Alibaba Cloud Model Studio:API da base de conhecimento

// This sample code is for reference only. Do not use it in a production environment.
import com.aliyun.bailian20231229.models.*;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.io.File;
import java.io.FileInputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.security.MessageDigest;
import java.util.*;
import java.util.concurrent.TimeUnit;

public class KnowledgeBaseCreate {

    /**
     * Checks for required environment variables and prompts for any that are missing.
     *
     * @return true if all required environment variables are set, false otherwise.
     */
    public static boolean checkEnvironmentVariables() {
        Map<String, String> requiredVars = new HashMap<>();
        requiredVars.put("ALIBABA_CLOUD_ACCESS_KEY_ID", "Alibaba Cloud AccessKey ID");
        requiredVars.put("ALIBABA_CLOUD_ACCESS_KEY_SECRET", "Alibaba Cloud AccessKey secret");
        requiredVars.put("WORKSPACE_ID", "Alibaba Cloud Model Studio workspace ID");

        List<String> missingVars = new ArrayList<>();
        for (Map.Entry<String, String> entry : requiredVars.entrySet()) {
            String value = System.getenv(entry.getKey());
            if (value == null || value.isEmpty()) {
                missingVars.add(entry.getKey());
                System.out.println("Error: Set the " + entry.getKey() + " environment variable (" + entry.getValue() + ")");
            }
        }

        return missingVars.isEmpty();
    }

    /**
     * Calculates the MD5 hash of a file.
     *
     * @param filePath The local path of the file.
     * @return The MD5 hash of the file.
     * @throws Exception if an error occurs.
     */
    public static String calculateMD5(String filePath) throws Exception {
        MessageDigest md = MessageDigest.getInstance("MD5");
        try (FileInputStream fis = new FileInputStream(filePath)) {
            byte[] buffer = new byte[4096];
            int bytesRead;
            while ((bytesRead = fis.read(buffer)) != -1) {
                md.update(buffer, 0, bytesRead);
            }
        }
        StringBuilder sb = new StringBuilder();
        for (byte b : md.digest()) {
            sb.append(String.format("%02x", b & 0xff));
        }
        return sb.toString();
    }

    /**
     * Gets the file size in bytes.
     *
     * @param filePath The local path of the file.
     * @return The file size in bytes.
     */
    public static String getFileSize(String filePath) {
        File file = new File(filePath);
        long fileSize = file.length();
        return String.valueOf(fileSize);
    }

    /**
     * Initializes the client.
     *
     * @return The configured client object.
     */
    public static com.aliyun.bailian20231229.Client createClient() throws Exception {
        com.aliyun.teaopenapi.models.Config config = new com.aliyun.teaopenapi.models.Config()
                .setAccessKeyId(System.getenv("ALIBABA_CLOUD_ACCESS_KEY_ID"))
                .setAccessKeySecret(System.getenv("ALIBABA_CLOUD_ACCESS_KEY_SECRET"));
        // The following endpoint is a public cloud endpoint. You can change the endpoint as needed.
        config.endpoint = "bailian.ap-southeast-1.aliyuncs.com";
        return new com.aliyun.bailian20231229.Client(config);
    }

    /**
     * Requests a file upload lease.
     *
     * @param client      The client object.
     * @param categoryId  The category ID.
     * @param fileName    The file name.
     * @param fileMd5     The MD5 hash of the file.
     * @param fileSize    The file size in bytes.
     * @param workspaceId The workspace ID.
     * @return The response from Alibaba Cloud Model Studio.
     */
    public static ApplyFileUploadLeaseResponse applyLease(com.aliyun.bailian20231229.Client client, String categoryId, String fileName, String fileMd5, String fileSize, String workspaceId) throws Exception {
        Map<String, String> headers = new HashMap<>();
        com.aliyun.bailian20231229.models.ApplyFileUploadLeaseRequest applyFileUploadLeaseRequest = new com.aliyun.bailian20231229.models.ApplyFileUploadLeaseRequest();
        applyFileUploadLeaseRequest.setFileName(fileName);
        applyFileUploadLeaseRequest.setMd5(fileMd5);
        applyFileUploadLeaseRequest.setSizeInBytes(fileSize);
        com.aliyun.teautil.models.RuntimeOptions runtime = new com.aliyun.teautil.models.RuntimeOptions();
        ApplyFileUploadLeaseResponse applyFileUploadLeaseResponse = null;
        applyFileUploadLeaseResponse = client.applyFileUploadLeaseWithOptions(categoryId, workspaceId, applyFileUploadLeaseRequest, headers, runtime);
        return applyFileUploadLeaseResponse;
    }

    /**
     * Uploads the file to temporary storage.
     *
     * @param preSignedUrl The URL from the upload lease.
     * @param headers      The request headers for the upload.
     * @param filePath     The local path of the file.
     * @throws Exception if an error occurs.
     */
    public static void uploadFile(String preSignedUrl, Map<String, String> headers, String filePath) throws Exception {
        File file = new File(filePath);
        if (!file.exists() || !file.isFile()) {
            throw new IllegalArgumentException("The file does not exist or is not a regular file: " + filePath);
        }

        try (FileInputStream fis = new FileInputStream(file)) {
            URL url = new URL(preSignedUrl);
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("PUT");
            conn.setDoOutput(true);

            // Set the upload request headers.
            conn.setRequestProperty("X-bailian-extra", headers.get("X-bailian-extra"));
            conn.setRequestProperty("Content-Type", headers.get("Content-Type"));

            // Read and upload the file in chunks.
            byte[] buffer = new byte[4096];
            int bytesRead;
            while ((bytesRead = fis.read(buffer)) != -1) {
                conn.getOutputStream().write(buffer, 0, bytesRead);
            }

            int responseCode = conn.getResponseCode();
            if (responseCode != 200) {
                throw new RuntimeException("Upload failed: " + responseCode);
            }
        }
    }

    /**
     * Adds the file to a category.
     *
     * @param client      The client object.
     * @param leaseId     The lease ID.
     * @param parser      The file parser.
     * @param categoryId  The category ID.
     * @param workspaceId The workspace ID.
     * @return The response from the Alibaba Cloud Model Studio service.
     */
    public static AddFileResponse addFile(com.aliyun.bailian20231229.Client client, String leaseId, String parser, String categoryId, String workspaceId) throws Exception {
        Map<String, String> headers = new HashMap<>();
        com.aliyun.bailian20231229.models.AddFileRequest addFileRequest = new com.aliyun.bailian20231229.models.AddFileRequest();
        addFileRequest.setLeaseId(leaseId);
        addFileRequest.setParser(parser);
        addFileRequest.setCategoryId(categoryId);
        com.aliyun.teautil.models.RuntimeOptions runtime = new com.aliyun.teautil.models.RuntimeOptions();
        return client.addFileWithOptions(workspaceId, addFileRequest, headers, runtime);
    }

    /**
     * Gets information about a file.
     *
     * @param client      The client object.
     * @param workspaceId The workspace ID.
     * @param fileId      The file ID.
     * @return The response from the Alibaba Cloud Model Studio service.
     */
    public static DescribeFileResponse describeFile(com.aliyun.bailian20231229.Client client, String workspaceId, String fileId) throws Exception {
        Map<String, String> headers = new HashMap<>();
        com.aliyun.teautil.models.RuntimeOptions runtime = new com.aliyun.teautil.models.RuntimeOptions();
        return client.describeFileWithOptions(workspaceId, fileId, headers, runtime);
    }

    /**
     * Creates a knowledge base (initializes an index) in Alibaba Cloud Model Studio.
     *
     * @param client        The client object.
     * @param workspaceId   The workspace ID.
     * @param fileId        The file ID.
     * @param name          The knowledge base name.
     * @param structureType The data structure of the knowledge base.
     * @param sourceType    The data source type. Supported types are category and file.
     * @param sinkType      The vector storage type for the knowledge base.
     * @return The response from the Alibaba Cloud Model Studio service.
     */
    public static CreateIndexResponse createIndex(com.aliyun.bailian20231229.Client client, String workspaceId, String fileId, String name, String structureType, String sourceType, String sinkType) throws Exception {
        Map<String, String> headers = new HashMap<>();
        com.aliyun.bailian20231229.models.CreateIndexRequest createIndexRequest = new com.aliyun.bailian20231229.models.CreateIndexRequest();
        createIndexRequest.setStructureType(structureType);
        createIndexRequest.setName(name);
        createIndexRequest.setSourceType(sourceType);
        createIndexRequest.setSinkType(sinkType);
        createIndexRequest.setDocumentIds(Collections.singletonList(fileId));
        com.aliyun.teautil.models.RuntimeOptions runtime = new com.aliyun.teautil.models.RuntimeOptions();
        return client.createIndexWithOptions(workspaceId, createIndexRequest, headers, runtime);
    }

    /**
     * Submits an indexing task to Alibaba Cloud Model Studio.
     *
     * @param client      The client object.
     * @param workspaceId The workspace ID.
     * @param indexId     The knowledge base ID.
     * @return The response from the Alibaba Cloud Model Studio service.
     */
    public static SubmitIndexJobResponse submitIndex(com.aliyun.bailian20231229.Client client, String workspaceId, String indexId) throws Exception {
        Map<String, String> headers = new HashMap<>();
        com.aliyun.bailian20231229.models.SubmitIndexJobRequest submitIndexJobRequest = new com.aliyun.bailian20231229.models.SubmitIndexJobRequest();
        submitIndexJobRequest.setIndexId(indexId);
        com.aliyun.teautil.models.RuntimeOptions runtime = new com.aliyun.teautil.models.RuntimeOptions();
        return client.submitIndexJobWithOptions(workspaceId, submitIndexJobRequest, headers, runtime);
    }

    /**
     * Gets the status of an indexing task.
     *
     * @param client      The client object.
     * @param workspaceId The workspace ID.
     * @param jobId       The task ID.
     * @param indexId     The knowledge base ID.
     * @return The response from the Alibaba Cloud Model Studio service.
     */
    public static GetIndexJobStatusResponse getIndexJobStatus(com.aliyun.bailian20231229.Client client, String workspaceId, String jobId, String indexId) throws Exception {
        Map<String, String> headers = new HashMap<>();
        com.aliyun.bailian20231229.models.GetIndexJobStatusRequest getIndexJobStatusRequest = new com.aliyun.bailian20231229.models.GetIndexJobStatusRequest();
        getIndexJobStatusRequest.setIndexId(indexId);
        getIndexJobStatusRequest.setJobId(jobId);
        com.aliyun.teautil.models.RuntimeOptions runtime = new com.aliyun.teautil.models.RuntimeOptions();
        GetIndexJobStatusResponse getIndexJobStatusResponse = null;
        getIndexJobStatusResponse = client.getIndexJobStatusWithOptions(workspaceId, getIndexJobStatusRequest, headers, runtime);
        return getIndexJobStatusResponse;
    }

    /**
     * Creates a knowledge base in Alibaba Cloud Model Studio.
     *
     * @param filePath    The local path of the file.
     * @param workspaceId The workspace ID.
     * @param name        The knowledge base name.
     * @return The knowledge base ID if successful; otherwise, null.
     */
    public static String createKnowledgeBase(String filePath, String workspaceId, String name) {
        // Set default values.
        String categoryId = "default";
        String parser = "DASHSCOPE_DOCMIND";
        String sourceType = "DATA_CENTER_FILE";
        String structureType = "unstructured";
        String sinkType = "DEFAULT";
        try {
            // Step 1: Initializing the client.
            System.out.println("Step 1: Initializing the client.");
            com.aliyun.bailian20231229.Client client = createClient();

            // Step 2: Preparing file information.
            System.out.println("Step 2: Preparing file information.");
            String fileName = new File(filePath).getName();
            String fileMd5 = calculateMD5(filePath);
            String fileSize = getFileSize(filePath);

            // Step 3: Requesting an upload lease from Alibaba Cloud Model Studio.
            System.out.println("Step 3: Requesting an upload lease from Alibaba Cloud Model Studio.");
            ApplyFileUploadLeaseResponse leaseResponse = applyLease(client, categoryId, fileName, fileMd5, fileSize, workspaceId);
            String leaseId = leaseResponse.getBody().getData().getFileUploadLeaseId();
            String uploadUrl = leaseResponse.getBody().getData().getParam().getUrl();
            Object uploadHeaders = leaseResponse.getBody().getData().getParam().getHeaders();

            // Step 4: Uploading the file to Alibaba Cloud Model Studio.
            System.out.println("Step 4: Uploading the file to Alibaba Cloud Model Studio.");
            // The jackson-databind dependency is required.
            // Convert the uploadHeaders from the previous step to a Map (key-value pairs).
            ObjectMapper mapper = new ObjectMapper();
            Map<String, String> uploadHeadersMap = (Map<String, String>) mapper.readValue(mapper.writeValueAsString(uploadHeaders), Map.class);
            uploadFile(uploadUrl, uploadHeadersMap, filePath);

            // Step 5: Adding the file to the Alibaba Cloud Model Studio server.
            System.out.println("Step 5: Adding the file to the Alibaba Cloud Model Studio server.");
            AddFileResponse addResponse = addFile(client, leaseId, parser, categoryId, workspaceId);
            String fileId = addResponse.getBody().getData().getFileId();

            // Step 6: Checking the file status in Alibaba Cloud Model Studio.
            System.out.println("Step 6: Checking the file status in Alibaba Cloud Model Studio.");
            while (true) {
                DescribeFileResponse describeResponse = describeFile(client, workspaceId, fileId);
                String status = describeResponse.getBody().getData().getStatus();
                System.out.println("Current file status: " + status);

                if (status.equals("INIT")) {
                    System.out.println("The file is pending parsing.");
                } else if (status.equals("PARSING")) {
                    System.out.println("The file is being parsed.");
                } else if (status.equals("PARSE_SUCCESS")) {
                    System.out.println("File parsed successfully.");
                    break;
                } else {
                    System.out.println("Unknown file status: " + status + ". Contact technical support.");
                    return null;
                }
                TimeUnit.SECONDS.sleep(5);
            }

            // Step 7: Creating the knowledge base in Alibaba Cloud Model Studio.
            System.out.println("Step 7: Creating the knowledge base in Alibaba Cloud Model Studio.");
            CreateIndexResponse indexResponse = createIndex(client, workspaceId, fileId, name, structureType, sourceType, sinkType);
            String indexId = indexResponse.getBody().getData().getId();

            // Step 8: Submitting an indexing task to Alibaba Cloud Model Studio.
            System.out.println("Step 8: Submitting an indexing task to Alibaba Cloud Model Studio.");
            SubmitIndexJobResponse submitResponse = submitIndex(client, workspaceId, indexId);
            String jobId = submitResponse.getBody().getData().getId();

            // Step 9: Getting the status of the indexing task from Alibaba Cloud Model Studio.
            System.out.println("Step 9: Getting the status of the indexing task from Alibaba Cloud Model Studio.");
            while (true) {
                GetIndexJobStatusResponse getStatusResponse = getIndexJobStatus(client, workspaceId, jobId, indexId);
                String status = getStatusResponse.getBody().getData().getStatus();
                System.out.println("Current indexing task status: " + status);

                if (status.equals("COMPLETED")) {
                    break;
                }
                TimeUnit.SECONDS.sleep(5);
            }

            System.out.println("The knowledge base was created successfully.");
            return indexId;

        } catch (Exception e) {
            System.out.println("An error occurred: " + e.getMessage());
            e.printStackTrace();
            return null;
        }
    }

    /**
     * The main entry point for the application.
     */
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        if (!checkEnvironmentVariables()) {
            return;
        }

        System.out.print("Enter the local path to the file to upload. For example, on Linux: /xxx/xxx/Alibaba_Cloud_Model_Studio_Phone_Series_Introduction.docx:");
        String filePath = scanner.nextLine();

        System.out.print("Enter a name for your knowledge base: ");
        String kbName = scanner.nextLine();

        String workspaceId = System.getenv("WORKSPACE_ID");
        String result = createKnowledgeBase(filePath, workspaceId, kbName);
        if (result != null) {
            System.out.println("Knowledge base ID: " + result);
        }
    }
}

<?php
// This sample code is for reference only. Do not use it in a production environment.
namespace AlibabaCloud\SDK\Sample;

use AlibabaCloud\Dara\Models\RuntimeOptions;
use AlibabaCloud\SDK\Bailian\V20231229\Bailian;
use AlibabaCloud\SDK\Bailian\V20231229\Models\AddFileRequest;
use \Exception;

use Darabonba\OpenApi\Models\Config;
use AlibabaCloud\SDK\Bailian\V20231229\Models\ApplyFileUploadLeaseRequest;
use AlibabaCloud\SDK\Bailian\V20231229\Models\CreateIndexRequest;
use AlibabaCloud\SDK\Bailian\V20231229\Models\SubmitIndexJobRequest;
use AlibabaCloud\SDK\Bailian\V20231229\Models\GetIndexJobStatusRequest;

class KnowledgeBaseCreate {

    /**
    * Checks for and prompts you to set the required environment variables.
    *
    * @return bool true if all required environment variables are set; otherwise, false.
    */
    public static function checkEnvironmentVariables() {
        $requiredVars = [
            'ALIBABA_CLOUD_ACCESS_KEY_ID' => 'Alibaba Cloud AccessKey ID',
            'ALIBABA_CLOUD_ACCESS_KEY_SECRET' => 'Alibaba Cloud AccessKey secret',
            'WORKSPACE_ID' => 'Alibaba Cloud Model Studio workspace ID'
        ];
        $missingVars = [];
        foreach ($requiredVars as $var => $description) {
            if (!getenv($var)) {
                $missingVars[] = $var;
                echo "Error: Set the $var environment variable ($description)\n";
            }
        }
        return count($missingVars) === 0;
    }

    /**
     * Calculates the MD5 hash of a file.
     *
     * @param string $filePath The local path of the file.
     * @return string The MD5 hash of the file.
     */
    public static function calculateMd5($filePath) {
        $md5Hash = hash_init("md5");
        $handle = fopen($filePath, "rb");
        while (!feof($handle)) {
            $chunk = fread($handle, 4096);
            hash_update($md5Hash, $chunk);
        }
        fclose($handle);
        return hash_final($md5Hash);
    }

    /**
     * Gets the file size in bytes.
     *
     * @param string $filePath The local path of the file.
     * @return int The file size in bytes.
     */
    public static function getFileSize($filePath) {
        return (string)filesize($filePath);
    }

    /**
     * Initializes the client.
     *
     * @return Bailian The configured client object.
     */
    public static function createClient(){
        $config = new Config([
            "accessKeyId" => getenv("ALIBABA_CLOUD_ACCESS_KEY_ID"), 
            "accessKeySecret" => getenv("ALIBABA_CLOUD_ACCESS_KEY_SECRET")
        ]);
        // The following endpoint is for the public cloud. You can change it as needed.
        $config->endpoint = 'bailian.ap-southeast-1.aliyuncs.com';
        return new Bailian($config);
    }

    /**
     * Applies for a file upload lease.
     *
     * @param Bailian $client The client.
     * @param string $categoryId The category ID.
     * @param string $fileName The file name.
     * @param string $fileMd5 The MD5 hash of the file.
     * @param int $fileSize The file size in bytes.
     * @param string $workspaceId The workspace ID.
     * @return ApplyFileUploadLeaseResponse The service response.
     */
    public static function applyLease($client, $categoryId, $fileName, $fileMd5, $fileSize, $workspaceId) {
        $headers = [];
        $applyFileUploadLeaseRequest = new ApplyFileUploadLeaseRequest([
            "fileName" => $fileName,
            "md5" => $fileMd5,
            "sizeInBytes" => $fileSize
        ]);
        $runtime = new RuntimeOptions([]);
        return $client->applyFileUploadLeaseWithOptions($categoryId, $workspaceId, $applyFileUploadLeaseRequest, $headers, $runtime);
    }

    /**
     * Uploads the file to temporary storage.
    *
    * @param string $preSignedUrl The URL from the upload lease.
    * @param array $headers The request headers for the upload.
    * @param string $filePath The local path of the file.
    */
    public static function uploadFile($preSignedUrl, $headers, $filePath) {
        $fileContent = file_get_contents($filePath);
        // Set the upload request headers.
        $uploadHeaders = [
            "X-bailian-extra" => $headers["X-bailian-extra"],
            "Content-Type" => $headers["Content-Type"]
        ];
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $preSignedUrl);
        curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "PUT");
        curl_setopt($ch, CURLOPT_POSTFIELDS, $fileContent);
        curl_setopt($ch, CURLOPT_HTTPHEADER, array_map(function($key, $value) {
            return "$key: $value";
        }, array_keys($uploadHeaders), $uploadHeaders));
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        $response = curl_exec($ch);
        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        if ($httpCode != 200) {
            throw new Exception("Upload failed: " . curl_error($ch));
        }
        curl_close($ch);
    }

    /**
     * Adds the file to a category.
     *
     * @param Bailian $client The client.
     * @param string $leaseId The lease ID.
     * @param string $parser The parser for the file.
     * @param string $categoryId The category ID.
     * @param string $workspaceId The workspace ID.
     * @return AddFileResponse The service response.
     */
    public static function addFile($client, $leaseId, $parser, $categoryId, $workspaceId) {
        $headers = [];
        $addFileRequest = new AddFileRequest([
            "leaseId" => $leaseId,
            "parser" => $parser,
            "categoryId" => $categoryId
        ]);
        $runtime = new RuntimeOptions([]);
        return $client->addFileWithOptions($workspaceId, $addFileRequest, $headers, $runtime);
    }

    /**
     * Gets the basic information of a file.
     *
     * @param Bailian $client The client.
     * @param string $workspaceId The workspace ID.
     * @param string $fileId The file ID.
     * @return DescribeFileResponse The service response.
     */
    public static function describeFile($client, $workspaceId, $fileId) {
        $headers = [];
        $runtime = new RuntimeOptions([]);
        return $client->describeFileWithOptions($workspaceId, $fileId, $headers, $runtime);
    }

    /**
     * Creates a knowledge base (initializes an index).
     *
     * @param Bailian $client The client.
     * @param string $workspaceId The workspace ID.
     * @param string $fileId The file ID.
     * @param string $name The knowledge base name.
     * @param string $structureType The data structure of the knowledge base.
     * @param string $sourceType The data type of the data source. Category and file types are supported.
     * @param string $sinkType The vector storage type for the knowledge base.
     * @return CreateIndexResponse The service response.
     */
    public static function createIndex($client, $workspaceId, $fileId, $name, $structureType, $sourceType, $sinkType) {
        $headers = [];
        $createIndexRequest = new CreateIndexRequest([
            "structureType" => $structureType,
            "name" => $name,
            "sourceType" => $sourceType,
            "documentIds" => [
                $fileId
            ],
            "sinkType" => $sinkType
        ]);
        $runtime = new RuntimeOptions([]);
        return $client->createIndexWithOptions($workspaceId, $createIndexRequest, $headers, $runtime);
    }

    /**
     * Submits an indexing task.
     *
     * @param Bailian $client The client.
     * @param string $workspaceId The workspace ID.
     * @param string $indexId The knowledge base ID.
     * @return SubmitIndexJobResponse The service response.
     */
    public static function submitIndex($client, $workspaceId, $indexId) {
        $headers = [];
        $submitIndexJobRequest = new SubmitIndexJobRequest([
            'indexId' => $indexId
        ]);
        $runtime = new RuntimeOptions([]);
        return $client->submitIndexJobWithOptions($workspaceId, $submitIndexJobRequest, $headers, $runtime);
    }

    /**
     * Queries the status of an indexing task.
     *
     * @param Bailian $client The client.
     * @param string $workspaceId The workspace ID.
     * @param string $indexId The knowledge base ID.
     * @param string $jobId The task ID.
     * @return GetIndexJobStatusResponse The service response.
     */
    public static function getIndexJobStatus($client, $workspaceId, $jobId, $indexId) {
        $headers = [];
        $getIndexJobStatusRequest = new GetIndexJobStatusRequest([
            'indexId' => $indexId,
            'jobId' => $jobId
        ]);
        $runtime = new RuntimeOptions([]);
        return $client->getIndexJobStatusWithOptions($workspaceId, $getIndexJobStatusRequest, $headers, $runtime);
    }

    /**
     * Creates a knowledge base.
     *
     * @param string $filePath The local path of the file.
     * @param string $workspaceId The workspace ID.
     * @param string $name The knowledge base name.
     * @return string|null The ID of the created knowledge base, or null on failure.
     */
    public static function createKnowledgeBase($filePath, $workspaceId, $name) {
        // Set default values.
        $categoryId = 'default';
        $parser = 'DASHSCOPE_DOCMIND';
        $sourceType = 'DATA_CENTER_FILE';
        $structureType = 'unstructured';
        $sinkType = 'DEFAULT';
        try {
            // Step 1: Initialize the client.
            echo "Step 1: Initialize the client\n";
            $client = self::createClient();

            // Step 2: Prepare file information.
            echo "Step 2: Prepare file information\n";
            $fileName = basename($filePath);
            echo "File name: $fileName\n";
            $fileMd5 = self::calculateMd5($filePath);
            $fileSize = self::getFileSize($filePath);

            // Step 3: Apply for an upload lease.
            echo "Step 3: Applying for an upload lease\n";
            $leaseResponse = self::applyLease($client, $categoryId, $fileName, $fileMd5, $fileSize, $workspaceId);
            $leaseId = $leaseResponse->body->data->fileUploadLeaseId;
            $uploadUrl = $leaseResponse->body->data->param->url;
            $uploadHeaders = $leaseResponse->body->data->param->headers;
            $uploadHeadersMap = json_decode(json_encode($uploadHeaders), true);

            // Step 4: Upload the file.
            echo "Step 4: Uploading the file\n";
            self::uploadFile($uploadUrl, $uploadHeadersMap, $filePath);

            // Step 5: Register the file with the service.
            echo "Step 5: Registering the file with the service\n";
            $addResponse = self::addFile($client, $leaseId, $parser, $categoryId, $workspaceId);
            $fileId = $addResponse->body->data->fileId;
            echo "File ID: $fileId\n";
            // Step 6: Check the file status.
            echo "Step 6: Checking file status\n";
            while (true) {
                $describeResponse = self::describeFile($client, $workspaceId, $fileId);
                $status = $describeResponse->body->data->status;
                echo "Current file status: $status\n";
                if ($status == 'INIT') {
                    echo "The file is pending parsing. Please wait...\n";
                } elseif ($status == 'PARSING') {
                    echo "The file is being parsed. Please wait...\n";
                } elseif ($status == 'PARSE_SUCCESS') {
                    echo "File parsed successfully.\n";
                    break;
                } else {
                    echo "Unknown file status: $status. Contact technical support.\n";
                    return null;
                }
                sleep(5);
            }

            // Step 7: Initialize the knowledge base.
            echo "Step 7: Initializing the knowledge base\n";
            $indexResponse = self::createIndex($client, $workspaceId, $fileId, $name, $structureType, $sourceType, $sinkType);
            $indexId = $indexResponse->body->data->id;

            // Step 8: Submit an indexing task.
            echo "Step 8: Submitting the indexing task\n";
            $submitResponse = self::submitIndex($client, $workspaceId, $indexId);
            $jobId = $submitResponse->body->data->id;

            // Step 9: Get the status of the indexing task.
            echo "Step 9: Checking indexing task status\n";
            while (true) {
                $getIndexJobStatusResponse = self::getIndexJobStatus($client, $workspaceId, $jobId, $indexId);
                $status = $getIndexJobStatusResponse->body->data->status;
                echo "Current indexing task status: $status\n";
                if ($status == 'COMPLETED') {
                    break;
                }
                sleep(5);
            }
            echo "Knowledge base created successfully!\n";
            return $indexId;
        } catch (Exception $e) {
            echo "An error occurred: {$e->getMessage()}\n";
            return null;
        }
    }

    /**
     * The main function.
     */
    public static function main($args){
        if (!self::checkEnvironmentVariables()) {
            echo "Environment variable check failed.\n";
            return;
        }
        $filePath = readline("Enter the local path of the file to upload (e.g., /path/to/your/file.docx): ");
        $kbName = readline("Enter a name for your knowledge base: ");
        $workspaceId = getenv('WORKSPACE_ID');
        $result = self::createKnowledgeBase($filePath, $workspaceId, $kbName);
       if ($result) {
           echo "Knowledge base ID: $result\n";
       } else {
           echo "Failed to create the knowledge base.\n";
       }
    }
}
// Assumes autoload.php is in the parent directory of the current file. Adjust the path according to your project's structure.
$path = __DIR__ . \DIRECTORY_SEPARATOR . '..' . \DIRECTORY_SEPARATOR . 'vendor' . \DIRECTORY_SEPARATOR . 'autoload.php';
if (file_exists($path)) {
    require_once $path;
}
KnowledgeBaseCreate::main(array_slice($argv, 1));

// This sample code is for reference only. Do not use it in a production environment.
'use strict';

const fs = require('fs');
const path = require('path');
const axios = require('axios');
const crypto = require('crypto');

const bailian20231229 = require('@alicloud/bailian20231229');
const OpenApi = require('@alicloud/openapi-client');
const Util = require('@alicloud/tea-util');
const Tea = require('@alicloud/tea-typescript');

class KbCreate {

  /**
   * Checks if the required environment variables are set.
   * @returns {boolean} - True if all required environment variables are set, false otherwise.
   */
  static checkEnvironmentVariables() {
    const requiredVars = {
      'ALIBABA_CLOUD_ACCESS_KEY_ID': 'Alibaba Cloud Access Key ID',
      'ALIBABA_CLOUD_ACCESS_KEY_SECRET': 'Alibaba Cloud Access Key Secret',
      'WORKSPACE_ID': 'Alibaba Cloud Model Studio workspace ID'
    };

    const missing = [];
    for (const [varName, desc] of Object.entries(requiredVars)) {
      if (!process.env[varName]) {
        console.error(`Error: Please set the ${varName} environment variable (${desc})`);
        missing.push(varName);
      }
    }
    return missing.length === 0;
  }

  /**
   * Calculates the MD5 hash of a file.
   * @param {string} filePath - The path to the local file.
   * @returns {Promise<string>} - The MD5 hash of the file.
   */
  static async calculateMD5(filePath) {
    const hash = crypto.createHash('md5');
    const stream = fs.createReadStream(filePath);

    return new Promise((resolve, reject) => {
      stream.on('data', chunk => hash.update(chunk));
      stream.on('end', () => resolve(hash.digest('hex')));
      stream.on('error', reject);
    });
  }

  /**
   * Gets the size of a file in bytes.
   * @param {string} filePath - The path to the local file.
   * @returns {string} - The file size as a string.
   */
  static getFileSize(filePath) {
    try {
      const stats = fs.statSync(filePath);
      return stats.size.toString();
    } catch (err) {
      console.error(`Failed to get file size: ${err.message}`);
      throw err;
    }
  }

  /**
   * Creates and configures the API client.
   * @returns {bailian20231229.default} A client instance.
   */
  static createClient() {
    const config = new OpenApi.Config({
      accessKeyId: process.env.ALIBABA_CLOUD_ACCESS_KEY_ID,
      accessKeySecret: process.env.ALIBABA_CLOUD_ACCESS_KEY_SECRET
    });
    // The endpoint below is for the public cloud. You can change the endpoint as needed.
    config.endpoint = `bailian.ap-southeast-1.aliyuncs.com`;
    return new bailian20231229.default(config);
  }

  /**
   * Requests a lease to upload a file.
   * @param {Bailian20231229Client} client - The client instance.
   * @param {string} categoryId - The category ID.
   * @param {string} fileName - The file name.
   * @param {string} fileMd5 - The MD5 hash of the file.
   * @param {string} fileSize - The file size in bytes.
   * @param {string} workspaceId - The workspace ID.
   * @returns {Promise<bailian20231229.ApplyFileUploadLeaseResponse>} - The response containing lease details.
   */
  static async applyLease(client, categoryId, fileName, fileMd5, fileSize, workspaceId) {
    const headers = {};
    const req = new bailian20231229.ApplyFileUploadLeaseRequest({
      md5: fileMd5,
      fileName,
      sizeInBytes: fileSize
    });
    const runtime = new Util.RuntimeOptions({});
    return await client.applyFileUploadLeaseWithOptions(
      categoryId,
      workspaceId,
      req,
      headers,
      runtime
    );
  }

  /**
   * Uploads a file to temporary storage.
   * @param {string} preSignedUrl - The presigned URL for the upload.
   * @param {Object} headers - The request headers for the upload.
   * @param {string} filePath - The path to the local file.
   */
  static async uploadFile(preSignedUrl, headers, filePath) {
    const uploadHeaders = {
      "X-bailian-extra": headers["X-bailian-extra"],
      "Content-Type": headers["Content-Type"]
    };
    const stream = fs.createReadStream(filePath);
    try {
      await axios.put(preSignedUrl, stream, { headers: uploadHeaders });
    } catch (e) {
      throw new Error(`Upload failed: ${e.message}`);
    }
  }

  /**
   * Adds a file to a category.
   * @param {Bailian20231229Client} client - The client instance.
   * @param {string} leaseId - The lease ID.
   * @param {string} parser - The parser for the file.
   * @param {string} categoryId - The category ID.
   * @param {string} workspaceId - The workspace ID.
   * @returns {Promise<bailian20231229.AddFileResponse>} - The response containing the file ID.
   */
  static async addFile(client, leaseId, parser, categoryId, workspaceId) {
    const headers = {};
    const req = new bailian20231229.AddFileRequest({
      leaseId,
      parser,
      categoryId
    });
    const runtime = new Util.RuntimeOptions({});
    return await client.addFileWithOptions(workspaceId, req, headers, runtime);
  }

  /**
   * Queries the parsing status of a file.
   * @param {Bailian20231229Client} client - The client instance.
   * @param {string} workspaceId - The workspace ID.
   * @param {string} fileId - The file ID.
   * @returns {Promise<bailian20231229.DescribeFileResponse>} - The response containing the file's status.
   */
  static async describeFile(client, workspaceId, fileId) {
    const headers = {};
    const runtime = new Util.RuntimeOptions({});
    return await client.describeFileWithOptions(workspaceId, fileId, headers, runtime);
  }

  /**
   * Initializes a knowledge base (index).
   * @param {Bailian20231229Client} client - The client instance.
   * @param {string} workspaceId - The workspace ID.
   * @param {string} fileId - The file ID.
   * @param {string} name - The name of the knowledge base.
   * @param {string} structureType - The data structure type of the knowledge base.
   * @param {string} sourceType - The data type of the source. Category and file types are supported.
   * @param {string} sinkType - The vector storage type for the knowledge base.
   * @returns {Promise<bailian20231229.CreateIndexResponse>} - The response containing the index ID.
   */
  static async createIndex(client, workspaceId, fileId, name, structureType, sourceType, sinkType) {
    const headers = {};
    const req = new bailian20231229.CreateIndexRequest({
      name,
      structureType,
      documentIds: [fileId],
      sourceType,
      sinkType
    });
    const runtime = new Util.RuntimeOptions({});
    return await client.createIndexWithOptions(workspaceId, req, headers, runtime);
  }

  /**
   * Submits an indexing job.
   * @param {Bailian20231229Client} client - The client instance.
   * @param {string} workspaceId - The workspace ID.
   * @param {string} indexId - The ID of the index (knowledge base) to process.
   * @returns {Promise<bailian20231229.SubmitIndexJobResponse>} - The response containing the job ID.
   */
  static async submitIndex(client, workspaceId, indexId) {
    const headers = {};
    const req = new bailian20231229.SubmitIndexJobRequest({ indexId });
    const runtime = new Util.RuntimeOptions({});
    return await client.submitIndexJobWithOptions(workspaceId, req, headers, runtime);
  }

  /**
   * Queries the status of an indexing job.
   * @param {Bailian20231229Client} client - The client instance.
   * @param {string} workspaceId - The workspace ID.
   * @param {string} jobId - The job ID.
   * @param {string} indexId - The ID of the index (knowledge base) to process.
   * @returns {Promise<bailian20231229.GetIndexJobStatusResponse>} - The response containing the indexing job status.
   */
  static async getIndexJobStatus(client, workspaceId, jobId, indexId) {
    const headers = {};
    const req = new bailian20231229.GetIndexJobStatusRequest({ jobId, indexId });
    const runtime = new Util.RuntimeOptions({});
    return await client.getIndexJobStatusWithOptions(workspaceId, req, headers, runtime);
  }

  /**
   * Creates a knowledge base.
   * @param {string} filePath - The path to the local file.
   * @param {string} workspaceId - The workspace ID.
   * @param {string} name - The name of the knowledge base.
   * @returns {Promise<string | null>} - The ID of the knowledge base if successful, otherwise null.
   */
  static async createKnowledgeBase(filePath, workspaceId, name) {
    const categoryId = 'default';
    const parser = 'DASHSCOPE_DOCMIND';
    const sourceType = 'DATA_CENTER_FILE';
    const structureType = 'unstructured';
    const sinkType = 'DEFAULT';

    try {
      console.log("Step 1: Initializing the client.");
      const client = this.createClient();

      console.log("Step 2: Preparing file information.");
      const fileName = path.basename(filePath);
      const fileMd5 = await this.calculateMD5(filePath);
      const fileSize = this.getFileSize(filePath);

      console.log("Step 3: Applying for an upload lease from Alibaba Cloud Model Studio");
      const leaseRes = await this.applyLease(client, categoryId, fileName, fileMd5, fileSize, workspaceId);
      const leaseId = leaseRes.body.data.fileUploadLeaseId;
      const uploadUrl = leaseRes.body.data.param.url;
      const uploadHeaders = leaseRes.body.data.param.headers;

      console.log("Step 4: Uploading the file to Alibaba Cloud Model Studio");
      await this.uploadFile(uploadUrl, uploadHeaders, filePath);

      console.log("Step 5: Adding the file to Alibaba Cloud Model Studio");
      const addRes = await this.addFile(client, leaseId, parser, categoryId, workspaceId);
      const fileId = addRes.body.data.fileId;

      console.log("Step 6: Checking the file status in Alibaba Cloud Model Studio");
      while (true) {
        const descRes = await this.describeFile(client, workspaceId, fileId);
        const status = descRes.body.data.status;
        console.log(`Current file status: ${status}`);

        if (status === 'INIT') console.log("The file is pending parsing. Please wait.");
        else if (status === 'PARSING') console.log("The file is being parsed. Please wait.");
        else if (status === 'PARSE_SUCCESS') break;
        else {
          console.error(`Unknown file status: ${status}. Please contact technical support.`);
          return null;
        }
        await this.sleep(5);
      }

      console.log("Step 7: Initializing the knowledge base in Alibaba Cloud Model Studio");
      const indexRes = await this.createIndex(client, workspaceId, fileId, name, structureType, sourceType, sinkType);
      const indexId = indexRes.body.data.id;

      console.log("Step 8: Submitting an indexing job to Alibaba Cloud Model Studio");
      const submitRes = await this.submitIndex(client, workspaceId, indexId);
      const jobId = submitRes.body.data.id;

      console.log("Step 9: Checking the status of the indexing job from Alibaba Cloud Model Studio");
      while (true) {
        const jobRes = await this.getIndexJobStatus(client, workspaceId, jobId, indexId);
        const status = jobRes.body.data.status;
        console.log(`Current indexing job status: ${status}`);
        if (status === 'COMPLETED') break;
        await this.sleep(5);
      }
      console.log("Alibaba Cloud Model Studio knowledge base created successfully!");
      return indexId;
    } catch (e) {
      console.error(`An error occurred: ${e.message}`);
      return null;
    }
  }

  /**
   * Waits for a specified number of seconds.
   * @param {number} seconds - The wait time in seconds.
   * @returns {Promise<void>}
   */
  static sleep(seconds) {
    return new Promise(resolve => setTimeout(resolve, seconds * 1000));
  }

  static async main(args) {
    if (!this.checkEnvironmentVariables()) {
      console.log("Environment variable check failed.");
      return;
    }

    const readline = require('readline').createInterface({
      input: process.stdin,
      output: process.stdout
    });

    try {
      const filePath = await new Promise((resolve, reject) => {
        readline.question("Enter the local path to the file to upload (e.g., on Linux: /path/to/Alibaba Cloud Model Studio Phone Series Introduction.docx):", (ans) => {
          ans.trim() ? resolve(ans) : reject(new Error("The path cannot be empty."));
        });
      });
      const kbName = await new Promise((resolve, reject) => {
        readline.question("Enter a name for your knowledge base:", (ans) => {
          ans.trim() ? resolve(ans) : reject(new Error("The knowledge base name cannot be empty."));
        });
      });
      const workspaceId = process.env.WORKSPACE_ID;

      const result = await KbCreate.createKnowledgeBase(filePath, workspaceId, kbName);
      if (result) console.log(`Knowledge base ID: ${result}`);
      else console.log("Failed to create the knowledge base.");
    } catch (err) {
      console.error(err.message);
    } finally {
      readline.close();
    }
  }
}

exports.KbCreate = KbCreate;
KbCreate.main(process.argv.slice(2));

// This sample code is for reference only. Do not use it in a production environment.
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Security.Cryptography;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

using Newtonsoft.Json;
using Tea;
using Tea.Utils;

namespace AlibabaCloud.SDK.KnowledgeBase
{
    public class KnowledgeBaseCreate
    {
        /// <summary>
        /// Verifies that required environment variables are set.
        /// </summary>
        /// <returns>Returns `true` if all required environment variables are set; otherwise, `false`.</returns>
        public static bool CheckEnvironmentVariables()
        {
            var requiredVars = new Dictionary<string, string>
            {
                { "ALIBABA_CLOUD_ACCESS_KEY_ID", "Alibaba Cloud AccessKey ID" },
                { "ALIBABA_CLOUD_ACCESS_KEY_SECRET", "Alibaba Cloud AccessKey secret" },
                { "WORKSPACE_ID", "Alibaba Cloud Model Studio workspace ID" }
            };

            var missingVars = new List<string>();
            foreach (var entry in requiredVars)
            {
                string value = Environment.GetEnvironmentVariable(entry.Key);
                if (string.IsNullOrEmpty(value))
                {
                    missingVars.Add(entry.Key);
                    Console.WriteLine($"Error: Please set the {entry.Key} environment variable ({entry.Value}).");
                }
            }

            return missingVars.Count == 0;
        }

        /// <summary>
        /// Calculates the MD5 hash of a file.
        /// </summary>
        /// <param name="filePath">The local path of the file.</param>
        /// <returns>The MD5 hash of the file.</returns>
        /// <exception cref="Exception">Thrown if an error occurs during calculation.</exception>
        public static string CalculateMD5(string filePath)
        {
            using (var md5 = MD5.Create())
            {
                using (var stream = new FileStream(filePath, FileMode.Open, FileAccess.Read))
                {
                    byte[] hashBytes = md5.ComputeHash(stream);
                    StringBuilder sb = new StringBuilder();
                    foreach (byte b in hashBytes)
                    {
                        sb.Append(b.ToString("x2"));
                    }
                    return sb.ToString();
                }
            }
        }

        /// <summary>
        /// Gets the file size in bytes.
        /// </summary>
        /// <param name="filePath">The local path of the file.</param>
        /// <returns>The file size in bytes.</returns>
        public static string GetFileSize(string filePath)
        {
            var file = new FileInfo(filePath);
            return file.Length.ToString();
        }

        /// <summary>
        /// Initializes the client.
        /// </summary>
        /// <returns>The configured client object.</returns>
        /// <exception cref="Exception">Thrown if an error occurs during initialization.</exception>
        public static AlibabaCloud.SDK.Bailian20231229.Client CreateClient()
        {
            var config = new AlibabaCloud.OpenApiClient.Models.Config
            {
                AccessKeyId = Environment.GetEnvironmentVariable("ALIBABA_CLOUD_ACCESS_KEY_ID"),
                AccessKeySecret = Environment.GetEnvironmentVariable("ALIBABA_CLOUD_ACCESS_KEY_SECRET"),
            };
            // This is an example public endpoint. Change it as needed.
            config.Endpoint = "bailian.ap-southeast-1.aliyuncs.com";
            return new AlibabaCloud.SDK.Bailian20231229.Client(config);
        }

        /// <summary>
        /// Requests a file upload lease.
        /// </summary>
        /// <param name="client">The client object.</param>
        /// <param name="categoryId">The category ID.</param>
        /// <param name="fileName">The file name.</param>
        /// <param name="fileMd5">The MD5 hash of the file.</param>
        /// <param name="fileSize">The file size in bytes.</param>
        /// <param name="workspaceId">The workspace ID.</param>
        /// <returns>The response from Alibaba Cloud Model Studio.</returns>
        /// <exception cref="Exception">Thrown if an error occurs during the API call.</exception>
        public static AlibabaCloud.SDK.Bailian20231229.Models.ApplyFileUploadLeaseResponse ApplyLease(
            AlibabaCloud.SDK.Bailian20231229.Client client,
            string categoryId,
            string fileName,
            string fileMd5,
            string fileSize,
            string workspaceId)
        {
            var headers = new Dictionary<string, string>() { };
            var applyFileUploadLeaseRequest = new AlibabaCloud.SDK.Bailian20231229.Models.ApplyFileUploadLeaseRequest
            {
                FileName = fileName,
                Md5 = fileMd5,
                SizeInBytes = fileSize
            };
            var runtime = new AlibabaCloud.TeaUtil.Models.RuntimeOptions();
            return client.ApplyFileUploadLeaseWithOptions(categoryId, workspaceId, applyFileUploadLeaseRequest, headers, runtime);
        }

        /// <summary>
        /// Uploads the file to temporary storage.
        /// </summary>
        /// <param name="preSignedUrl">The URL from the upload lease.</param>
        /// <param name="headers">The request headers for the upload.</param>
        /// <param name="filePath">The local path of the file.</param>
        /// <exception cref="Exception">Thrown if an error occurs during the upload.</exception>
        public static void UploadFile(string preSignedUrl, Dictionary<string, string> headers, string filePath)
        {
            var file = new FileInfo(filePath);
            if (!File.Exists(filePath))
            {
                throw new ArgumentException($"The file does not exist or is not a regular file: {filePath}");
            }

            using (var fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
            {
                var url = new Uri(preSignedUrl);
                var conn = (HttpWebRequest)WebRequest.Create(url);
                conn.Method = "PUT";
                conn.ContentType = headers["Content-Type"];
                conn.Headers.Add("X-bailian-extra", headers["X-bailian-extra"]);

                byte[] buffer = new byte[4096];
                int bytesRead;
                using (var requestStream = conn.GetRequestStream())
                {
                    while ((bytesRead = fs.Read(buffer, 0, buffer.Length)) > 0)
                    {
                        requestStream.Write(buffer, 0, bytesRead);
                    }
                }

                using (var response = (HttpWebResponse)conn.GetResponse())
                {
                    if (response.StatusCode != HttpStatusCode.OK)
                    {
                        throw new Exception($"Upload failed: {response.StatusCode}");
                    }
                }
            }
        }

        /// <summary>
        /// Adds the file to a category.
        /// </summary>
        /// <param name="client">The client object.</param>
        /// <param name="leaseId">The lease ID.</param>
        /// <param name="parser">The parser to use for the file.</param>
        /// <param name="categoryId">The category ID.</param>
        /// <param name="workspaceId">The workspace ID.</param>
        /// <returns>The response from Alibaba Cloud Model Studio.</returns>
        /// <exception cref="Exception">Thrown if an error occurs during the API call.</exception>
        public static AlibabaCloud.SDK.Bailian20231229.Models.AddFileResponse AddFile(
            AlibabaCloud.SDK.Bailian20231229.Client client,
            string leaseId,
            string parser,
            string categoryId,
            string workspaceId)
        {
            var headers = new Dictionary<string, string>() { };
            var addFileRequest = new AlibabaCloud.SDK.Bailian20231229.Models.AddFileRequest
            {
                LeaseId = leaseId,
                Parser = parser,
                CategoryId = categoryId
            };
            var runtime = new AlibabaCloud.TeaUtil.Models.RuntimeOptions();
            return client.AddFileWithOptions(workspaceId, addFileRequest, headers, runtime);
        }

        /// <summary>
        /// Queries basic file information.
        /// </summary>
        /// <param name="client">The client object.</param>
        /// <param name="workspaceId">The workspace ID.</param>
        /// <param name="fileId">The file ID.</param>
        /// <returns>The response from Alibaba Cloud Model Studio.</returns>
        /// <exception cref="Exception">Thrown if an error occurs during the API call.</exception>
        public static AlibabaCloud.SDK.Bailian20231229.Models.DescribeFileResponse DescribeFile(
            AlibabaCloud.SDK.Bailian20231229.Client client,
            string workspaceId,
            string fileId)
        {
            var headers = new Dictionary<string, string>() { };
            var runtime = new AlibabaCloud.TeaUtil.Models.RuntimeOptions();
            return client.DescribeFileWithOptions(workspaceId, fileId, headers, runtime);
        }

        /// <summary>
        /// Creates a knowledge base (initializes an index) in Alibaba Cloud Model Studio.
        /// </summary>
        /// <param name="client">The client object.</param>
        /// <param name="workspaceId">The workspace ID.</param>
        /// <param name="fileId">The file ID.</param>
        /// <param name="name">The name of the knowledge base.</param>
        /// <param name="structureType">The data structure of the knowledge base.</param>
        /// <param name="sourceType">The data source type. Supported types include `category` and `file`.</param>
        /// <param name="sinkType">The vector storage type for the knowledge base.</param>
        /// <returns>The response from Alibaba Cloud Model Studio.</returns>
        /// <exception cref="Exception">Thrown if an error occurs during the API call.</exception>
        public static AlibabaCloud.SDK.Bailian20231229.Models.CreateIndexResponse CreateIndex(
            AlibabaCloud.SDK.Bailian20231229.Client client,
            string workspaceId,
            string fileId,
            string name,
            string structureType,
            string sourceType,
            string sinkType)
        {
            var headers = new Dictionary<string, string>() { };
            var createIndexRequest = new AlibabaCloud.SDK.Bailian20231229.Models.CreateIndexRequest
            {
                StructureType = structureType,
                Name = name,
                SourceType = sourceType,
                SinkType = sinkType,
                DocumentIds = new List<string> { fileId }
            };
            var runtime = new AlibabaCloud.TeaUtil.Models.RuntimeOptions();
            return client.CreateIndexWithOptions(workspaceId, createIndexRequest, headers, runtime);
        }

        /// <summary>
        /// Submits an indexing task to Alibaba Cloud Model Studio.
        /// </summary>
        /// <param name="client">The client object.</param>
        /// <param name="workspaceId">The workspace ID.</param>
        /// <param name="indexId">The knowledge base ID.</param>
        /// <returns>The response from Alibaba Cloud Model Studio.</returns>
        /// <exception cref="Exception">Thrown if an error occurs during the API call.</exception>
        public static AlibabaCloud.SDK.Bailian20231229.Models.SubmitIndexJobResponse SubmitIndex(
            AlibabaCloud.SDK.Bailian20231229.Client client,
            string workspaceId,
            string indexId)
        {
            var headers = new Dictionary<string, string>() { };
            var submitIndexJobRequest = new AlibabaCloud.SDK.Bailian20231229.Models.SubmitIndexJobRequest
            {
                IndexId = indexId
            };
            var runtime = new AlibabaCloud.TeaUtil.Models.RuntimeOptions();
            return client.SubmitIndexJobWithOptions(workspaceId, submitIndexJobRequest, headers, runtime);
        }

        /// <summary>
        /// Queries the status of an indexing task.
        /// </summary>
        /// <param name="client">The client object.</param>
        /// <param name="workspaceId">The workspace ID.</param>
        /// <param name="jobId">The task ID.</param>
        /// <param name="indexId">The knowledge base ID.</param>
        /// <returns>The response from Alibaba Cloud Model Studio.</returns>
        /// <exception cref="Exception">Thrown if an error occurs during the API call.</exception>
        public static AlibabaCloud.SDK.Bailian20231229.Models.GetIndexJobStatusResponse GetIndexJobStatus(
            AlibabaCloud.SDK.Bailian20231229.Client client,
            string workspaceId,
            string jobId,
            string indexId)
        {
            var headers = new Dictionary<string, string>() { };
            var getIndexJobStatusRequest = new AlibabaCloud.SDK.Bailian20231229.Models.GetIndexJobStatusRequest
            {
                IndexId = indexId,
                JobId = jobId
            };
            var runtime = new AlibabaCloud.TeaUtil.Models.RuntimeOptions();
            return client.GetIndexJobStatusWithOptions(workspaceId, getIndexJobStatusRequest, headers, runtime);
        }

        /// <summary>
        /// Creates a knowledge base in Alibaba Cloud Model Studio.
        /// </summary>
        /// <param name="filePath">The local path of the file.</param>
        /// <param name="workspaceId">The workspace ID.</param>
        /// <param name="name">The name of the knowledge base.</param>
        /// <returns>The ID of the created knowledge base, or null if the operation fails.</returns>
        public static string CreateKnowledgeBase(string filePath, string workspaceId, string name)
        {
            // Set default values.
            string categoryId = "default";
            string parser = "DASHSCOPE_DOCMIND";
            string sourceType = "DATA_CENTER_FILE";
            string structureType = "unstructured";
            string sinkType = "DEFAULT";

            try
            {
                Console.WriteLine("Step 1: Initialize the client.");
                AlibabaCloud.SDK.Bailian20231229.Client client = CreateClient();

                Console.WriteLine("Step 2: Prepare file information.");
                var fileInfo = new FileInfo(filePath);
                string fileName = fileInfo.Name;
                string fileMd5 = CalculateMD5(filePath);
                string fileSize = GetFileSize(filePath);

                Console.WriteLine("Step 3: Request an upload lease from Alibaba Cloud Model Studio.");
                var leaseResponse = ApplyLease(client, categoryId, fileName, fileMd5, fileSize, workspaceId);
                string leaseId = leaseResponse.Body.Data.FileUploadLeaseId;
                string uploadUrl = leaseResponse.Body.Data.Param.Url;
                var uploadHeaders = leaseResponse.Body.Data.Param.Headers;

                Console.WriteLine("Step 4: Upload the file to Alibaba Cloud Model Studio.");
                // Requires the Newtonsoft.Json package.
                var uploadHeadersMap = JsonConvert.DeserializeObject<Dictionary<string, string>>(JsonConvert.SerializeObject(uploadHeaders));
                UploadFile(uploadUrl, uploadHeadersMap, filePath);

                Console.WriteLine("Step 5: Add the file to Alibaba Cloud Model Studio.");
                var addResponse = AddFile(client, leaseId, parser, categoryId, workspaceId);
                string fileId = addResponse.Body.Data.FileId;

                Console.WriteLine("Step 6: Check the file status in Alibaba Cloud Model Studio.");
                while (true)
                {
                    var describeResponse = DescribeFile(client, workspaceId, fileId);
                    string status = describeResponse.Body.Data.Status;
                    Console.WriteLine($"Current file status: {status}");

                    if (status == "INIT")
                    {
                        Console.WriteLine("The file is pending parsing. Please wait...");
                    }
                    else if (status == "PARSING")
                    {
                        Console.WriteLine("The file is being parsed. Please wait...");
                    }
                    else if (status == "PARSE_SUCCESS")
                    {
                        Console.WriteLine("File parsing complete.");
                        break;
                    }
                    else
                    {
                        Console.WriteLine($"Unknown file status: {status}. Please contact technical support.");
                        return null;
                    }
                    System.Threading.Thread.Sleep(5000);
                }

                Console.WriteLine("Step 7: Create the knowledge base in Alibaba Cloud Model Studio.");
                var indexResponse = CreateIndex(client, workspaceId, fileId, name, structureType, sourceType, sinkType);
                string indexId = indexResponse.Body.Data.Id;

                Console.WriteLine("Step 8: Submit an indexing task to Alibaba Cloud Model Studio.");
                var submitResponse = SubmitIndex(client, workspaceId, indexId);
                string jobId = submitResponse.Body.Data.Id;

                Console.WriteLine("Step 9: Check the status of the indexing task in Alibaba Cloud Model Studio.");
                while (true)
                {
                    var getStatusResponse = GetIndexJobStatus(client, workspaceId, jobId, indexId);
                    string status = getStatusResponse.Body.Data.Status;
                    Console.WriteLine($"Current indexing task status: {status}");

                    if (status == "COMPLETED")
                    {
                        break;
                    }
                    System.Threading.Thread.Sleep(5000);
                }

                Console.WriteLine("Knowledge base created successfully.");
                return indexId;

            }
            catch (Exception ex)
            {
                Console.WriteLine($"An error occurred: {ex.Message}");
                Console.WriteLine("Error details: " + ex.StackTrace);
                return null;
            }
        }

        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        public static void Main(string[] args)
        {
            if (!CheckEnvironmentVariables())
            {
                return;
            }

            Console.Write("Enter the local path of the file to upload (e.g., on Linux: /path/to/Product_Introduction_for_Model_Studio_Phone_Series.docx): ");
            string filePath = Console.ReadLine();

            Console.Write("Enter a name for your knowledge base: ");
            string kbName = Console.ReadLine();

            string workspaceId = Environment.GetEnvironmentVariable("WORKSPACE_ID");
            string result = CreateKnowledgeBase(filePath, workspaceId, kbName);
            if (result != null)
            {
                Console.WriteLine($"Knowledge base ID: {result}");
            }
        }
    }
}

// This sample code is for reference only. Do not use it directly in a production environment.
import com.aliyun.bailian20231229.models.RetrieveRequest;
import com.aliyun.bailian20231229.models.RetrieveResponse;
import com.aliyun.teautil.models.RuntimeOptions;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.util.*;

public class KnowledgeBaseRetrieve {

    /**
     * Checks for required environment variables and reports any that are missing.
     *
     * @return true if all required environment variables are set, false otherwise.
     */
    public static boolean checkEnvironmentVariables() {
        Map<String, String> requiredVars = new HashMap<>();
        requiredVars.put("ALIBABA_CLOUD_ACCESS_KEY_ID", "Your Alibaba Cloud AccessKey ID");
        requiredVars.put("ALIBABA_CLOUD_ACCESS_KEY_SECRET", "Your Alibaba Cloud AccessKey secret");
        requiredVars.put("WORKSPACE_ID", "Your Model Studio workspace ID");

        List<String> missingVars = new ArrayList<>();
        for (Map.Entry<String, String> entry : requiredVars.entrySet()) {
            String value = System.getenv(entry.getKey());
            if (value == null || value.isEmpty()) {
                missingVars.add(entry.getKey());
                System.out.println("Error: Set the " + entry.getKey() + " environment variable (" + entry.getValue() + ").");
            }
        }

        return missingVars.isEmpty();
    }

    /**
     * Initializes the client.
     *
     * @return The configured client object.
     */
    public static com.aliyun.bailian20231229.Client createClient() throws Exception {
        com.aliyun.teaopenapi.models.Config config = new com.aliyun.teaopenapi.models.Config()
                .setAccessKeyId(System.getenv("ALIBABA_CLOUD_ACCESS_KEY_ID"))
                .setAccessKeySecret(System.getenv("ALIBABA_CLOUD_ACCESS_KEY_SECRET"));
        // This is a public cloud endpoint. You can change it as needed.
        config.endpoint = "bailian.ap-southeast-1.aliyuncs.com";
        return new com.aliyun.bailian20231229.Client(config);
    }

    /**
     * Retrieves information from a specified knowledge base.
     *
     * @param client         The client object.
     * @param workspaceId    The workspace ID.
     * @param indexId        The knowledge base ID.
     * @param query          The search query.
     * @return               The response from the Model Studio service.
     */
    public static RetrieveResponse retrieveIndex(com.aliyun.bailian20231229.Client client, String workspaceId, String indexId, String query) throws Exception {
        RetrieveRequest retrieveRequest = new RetrieveRequest();
        retrieveRequest.setIndexId(indexId);
        retrieveRequest.setQuery(query);
        RuntimeOptions runtime = new RuntimeOptions();
        return client.retrieveWithOptions(workspaceId, retrieveRequest, null, runtime);
    }

    /**
     * Uses the Model Studio service to retrieve from a knowledge base.
     */
    public static void main(String[] args) {
        if (!checkEnvironmentVariables()) {
            System.out.println("Environment variable validation failed.");
            return;
        }

        try {
            // Step 1: Create a client.
            System.out.println("Step 1: Create a client.");
            com.aliyun.bailian20231229.Client client = createClient();

            // Step 2: Retrieve from the knowledge base.
            System.out.println("Step 2: Retrieve from the knowledge base.");
            Scanner scanner = new Scanner(System.in);
            System.out.print("Enter the knowledge base ID: "); // This is the Data.Id value returned by the CreateIndex operation. You can also obtain it from the knowledge base page in the Model Studio console.
            String indexId = scanner.nextLine();
            System.out.print("Enter the search query: ");
            String query = scanner.nextLine();
            String workspaceId = System.getenv("WORKSPACE_ID");
            RetrieveResponse resp = retrieveIndex(client, workspaceId, indexId, query);

            // Install jackson-databind to convert the response body to a JSON string.
            ObjectMapper mapper = new ObjectMapper();
            String result = mapper.writeValueAsString(resp.getBody());
            System.out.println(result);
        } catch (Exception e) {
            System.out.println("An error occurred: " + e.getMessage());
        }
    }
}

<?php
// This sample code is for reference only. Do not use it directly in a production environment.
namespace AlibabaCloud\SDK\Sample;

use AlibabaCloud\Dara\Models\RuntimeOptions;
use AlibabaCloud\SDK\Bailian\V20231229\Bailian;
use \Exception;

use Darabonba\OpenApi\Models\Config;
use AlibabaCloud\SDK\Bailian\V20231229\Models\RetrieveRequest;

class KnowledgeBaseRetrieve {

    /**
    * Checks for required environment variables and reports any that are missing.
    *
    * @return bool Returns true if all required environment variables are set, false otherwise.
    */
    public static function checkEnvironmentVariables() {
        $requiredVars = [
            'ALIBABA_CLOUD_ACCESS_KEY_ID' => 'Your Alibaba Cloud AccessKey ID',
            'ALIBABA_CLOUD_ACCESS_KEY_SECRET' => 'Your Alibaba Cloud AccessKey secret',
            'WORKSPACE_ID' => 'Your Model Studio workspace ID'
        ];
        $missingVars = [];
        foreach ($requiredVars as $var => $description) {
            if (!getenv($var)) {
                $missingVars[] = $var;
                echo "Error: Set the $var environment variable ($description).\n";
            }
        }
        return count($missingVars) === 0;
    }

    /**
     * Initializes the client.
     *
     * @return Bailian The configured client object.
     */
    public static function createClient(){
        $config = new Config([
            "accessKeyId" => getenv("ALIBABA_CLOUD_ACCESS_KEY_ID"), 
            "accessKeySecret" => getenv("ALIBABA_CLOUD_ACCESS_KEY_SECRET")
        ]);
        // This is a public cloud endpoint. You can change it as needed.
        $config->endpoint = 'bailian.ap-southeast-1.aliyuncs.com';
        return new Bailian($config);
    }

     /**
     * Retrieves information from a specified knowledge base.
     *
     * @param Bailian $client The client object.
     * @param string $workspaceId The workspace ID.
     * @param string $indexId The knowledge base ID.
     * @param string $query The search query.
     * @return RetrieveResponse The response from the Model Studio service.
     * @throws Exception
     */
    public static function retrieveIndex($client, $workspaceId, $indexId, $query) {
        $headers = [];
        $retrieveRequest = new RetrieveRequest([
            "query" => $query,
            "indexId" => $indexId
        ]);
        $runtime = new RuntimeOptions([]);
        return $client->retrieveWithOptions($workspaceId, $retrieveRequest, $headers, $runtime);
    }

    /**
     * Uses the Model Studio service to retrieve from a knowledge base.
     */
    public static function main($args){
        if (!self::checkEnvironmentVariables()) {
            echo "Environment variable validation failed.\n";
            return;
        }

        try {
            // Step 1: Create a client.
            echo "Step 1: Create a client.\n";
            $client = self::createClient();

            // Step 2: Retrieve from the knowledge base.
            echo "Step 2: Retrieve from the knowledge base.\n";
            $indexId = readline("Enter the knowledge base ID: "); // This is the Data.Id value returned by the CreateIndex operation. You can also obtain it from the knowledge base page in the Model Studio console.
            $query = readline("Enter the search query: "); 
            $workspaceId = getenv("WORKSPACE_ID");
            $resp = self::retrieveIndex($client, $workspaceId, $indexId, $query);
            $result = json_encode($resp->body, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT);
            echo $result . "\n";
        } catch (Exception $e) {
            echo "An error occurred: " . $e->getMessage() . "\n";
        }
    }
}
// Assume that autoload.php is in the parent directory of the current code file. Adjust the path based on your project structure.
$path = __DIR__ . \DIRECTORY_SEPARATOR . '..' . \DIRECTORY_SEPARATOR . 'vendor' . \DIRECTORY_SEPARATOR . 'autoload.php';
if (file_exists($path)) {
    require_once $path;
}
KnowledgeBaseRetrieve::main(array_slice($argv, 1));

// This sample code is for reference only. Do not use it directly in a production environment.
'use strict';

const bailian20231229 = require('@alicloud/bailian20231229');
const OpenApi = require('@alicloud/openapi-client');
const Util = require('@alicloud/tea-util');
const Tea = require('@alicloud/tea-typescript');

class KbRetrieve {

    /**
     * Checks for required environment variables and reports any that are missing.
     * @returns {boolean} - Returns true if all required environment variables are set, false otherwise.
     */
    static checkEnvironmentVariables() {
        const requiredVars = {
            'ALIBABA_CLOUD_ACCESS_KEY_ID': 'Your Alibaba Cloud AccessKey ID',
            'ALIBABA_CLOUD_ACCESS_KEY_SECRET': 'Your Alibaba Cloud AccessKey secret',
            'WORKSPACE_ID': 'Your Model Studio workspace ID'
        };

        const missing = [];
        for (const [varName, desc] of Object.entries(requiredVars)) {
            if (!process.env[varName]) {
                console.error(`Error: Set the ${varName} environment variable (${desc}).`);
                missing.push(varName);
            }
        }
        return missing.length === 0;
    }

    /**
     * Creates and configures a client.
     * @return Client
     * @throws Exception
     */
    static createClient() {
        const config = new OpenApi.Config({
            accessKeyId: process.env.ALIBABA_CLOUD_ACCESS_KEY_ID,
            accessKeySecret: process.env.ALIBABA_CLOUD_ACCESS_KEY_SECRET
        });
        // This is a public cloud endpoint. You can change it as needed.
        config.endpoint = 'bailian.ap-southeast-1.aliyuncs.com';
        return new bailian20231229.default(config);
    }

    /**
     * Retrieves information from a specified knowledge base.
     * @param {bailian20231229.Client} client The client.
     * @param {string} workspaceId The workspace ID.
     * @param {string} indexId The knowledge base ID.
     * @param {string} query The search query.
     * @returns {Promise<bailian20231229.RetrieveResponse>} The response from the Model Studio service.
     */
    static async retrieveIndex(client, workspaceId, indexId, query) {
        const headers = {};
        const req = new bailian20231229.RetrieveRequest({
            indexId,
            query
        });
        const runtime = new Util.RuntimeOptions({});
        return await client.retrieveWithOptions(workspaceId, req, headers, runtime);
    }

    /**
     * Uses the Model Studio service to retrieve from a knowledge base.
     */
    static async main(args) {
        if (!this.checkEnvironmentVariables()) {
            console.log("Environment variable validation failed.");
            return;
        }

        const readline = require('readline').createInterface({
            input: process.stdin,
            output: process.stdout
        });

        try {
            console.log("Step 1: Create a client.")
            const client = this.createClient();
            
            console.log("Step 2: Retrieve from the knowledge base.")
            const indexId = await new Promise((resolve, reject) => {
                // The knowledge base ID is the Data.Id value returned by the CreateIndex operation. You can also obtain it from the knowledge base page in the Model Studio console.
                readline.question("Enter the knowledge base ID: ", (ans) => {
                    ans.trim() ? resolve(ans) : reject(new Error("The knowledge base ID cannot be empty."));
                });
            });
            const query = await new Promise((resolve, reject) => {
                readline.question("Enter the search query: ", (ans) => {
                    ans.trim() ? resolve(ans) : reject(new Error("The search query cannot be empty."));
                });
            });
            const workspaceId = process.env.WORKSPACE_ID;
            const resp = await this.retrieveIndex(client, workspaceId, indexId, query);
            const result = JSON.stringify(resp.body);
            console.log(result);
        } catch (err) {
            console.error(`An error occurred: ${err.message}`);
            return;
        } finally {
            readline.close();
        }
    }
}

exports.KbRetrieve = KbRetrieve;
KbRetrieve.main(process.argv.slice(2));

// This sample code is for reference only. Do not use it directly in a production environment.
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;

using Newtonsoft.Json;
using Tea;
using Tea.Utils;

namespace AlibabaCloud.SDK.KnowledgeBase
{
    public class KnowledgeBaseRetrieve
    {
        /// <summary>
        /// Checks for required environment variables and reports any that are missing.
        /// </summary>
        /// <returns>Returns true if all required environment variables are set, false otherwise.</returns>
        public static bool CheckEnvironmentVariables()
        {
            var requiredVars = new Dictionary<string, string>
            {
                { "ALIBABA_CLOUD_ACCESS_KEY_ID", "Your Alibaba Cloud AccessKey ID" },
                { "ALIBABA_CLOUD_ACCESS_KEY_SECRET", "Your Alibaba Cloud AccessKey secret" },
                { "WORKSPACE_ID", "Your Model Studio workspace ID" }
            };

            var missingVars = new List<string>();
            foreach (var entry in requiredVars)
            {
                string value = Environment.GetEnvironmentVariable(entry.Key);
                if (string.IsNullOrEmpty(value))
                {
                    missingVars.Add(entry.Key);
                    Console.WriteLine($"Error: Set the {entry.Key} environment variable ({entry.Value}).");
                }
            }

            return missingVars.Count == 0;
        }

        /// <summary>
        /// Initializes the client.
        /// </summary>
        /// <returns>The configured client object.</returns>
        /// <exception cref="Exception">An exception is thrown if an error occurs during initialization.</exception>
        public static AlibabaCloud.SDK.Bailian20231229.Client CreateClient()
        {
            var config = new AlibabaCloud.OpenApiClient.Models.Config
            {
                AccessKeyId = Environment.GetEnvironmentVariable("ALIBABA_CLOUD_ACCESS_KEY_ID"),
                AccessKeySecret = Environment.GetEnvironmentVariable("ALIBABA_CLOUD_ACCESS_KEY_SECRET"),
            };
            // This is a public cloud endpoint. You can change it as needed.
            config.Endpoint = "bailian.ap-southeast-1.aliyuncs.com";
            return new AlibabaCloud.SDK.Bailian20231229.Client(config);
        }

        /// <summary>
        /// Retrieves information from a specified knowledge base.
        /// </summary>
        /// <param name="client">The client object.</param>
        /// <param name="workspaceId">The workspace ID.</param>
        /// <param name="indexId">The knowledge base ID.</param>
        /// <param name="query">The search query.</param>
        /// <returns>The response from the Model Studio service.</returns>
        /// <exception cref="Exception">An exception is thrown if the call fails.</exception>
        public static AlibabaCloud.SDK.Bailian20231229.Models.RetrieveResponse RetrieveIndex(
            AlibabaCloud.SDK.Bailian20231229.Client client,
            string workspaceId,
            string indexId,
            string query)
        {
            var headers = new Dictionary<string, string>() { };
            var retrieveRequest = new AlibabaCloud.SDK.Bailian20231229.Models.RetrieveRequest
            {
                IndexId = indexId,
                Query = query
            };
            var runtime = new AlibabaCloud.TeaUtil.Models.RuntimeOptions();
            return client.RetrieveWithOptions(workspaceId, retrieveRequest, headers, runtime);
        }

        /// <summary>
        /// Uses the Model Studio service to retrieve from a knowledge base.
        /// </summary>
        public static void Main(string[] args)
        {
            if (!CheckEnvironmentVariables())
            {
                Console.WriteLine("Environment variable validation failed.");
                return;
            }

            try
            {
                // Step 1: Create a client.
                Console.WriteLine("Step 1: Create a client.");
                AlibabaCloud.SDK.Bailian20231229.Client client = CreateClient();

                // Step 2: Retrieve from the knowledge base.
                Console.WriteLine("Step 2: Retrieve from the knowledge base.");
                Console.Write("Enter the knowledge base ID: "); // This is the Data.Id value returned by the CreateIndex operation. You can also obtain it from the knowledge base page in the Model Studio console.
                string indexId = Console.ReadLine();
                Console.Write("Enter the search query: ");
                string query = Console.ReadLine();
                string workspaceId = Environment.GetEnvironmentVariable("WORKSPACE_ID");
                AlibabaCloud.SDK.Bailian20231229.Models.RetrieveResponse resp = RetrieveIndex(client, workspaceId, indexId, query);

                // Install Newtonsoft.Json to convert the response body to a JSON string.
                var mapper = new JsonSerializerSettings { Formatting = Formatting.Indented };
                string result = JsonConvert.SerializeObject(resp.Body, mapper);
                Console.WriteLine(result);
            }
            catch (Exception e)
            {
                Console.WriteLine("An error occurred: " + e.Message);
            }
        }
    }
}

// This sample code is for reference only. Do not use it directly in a production environment.
package main

import (
	"bufio"
	"fmt"
	"os"
	"strings"

	bailian20231229 "github.com/alibabacloud-go/bailian-20231229/v2/client"
	openapi "github.com/alibabacloud-go/darabonba-openapi/v2/client"
	util "github.com/alibabacloud-go/tea-utils/v2/service"
	"github.com/alibabacloud-go/tea/tea"
)

// checkEnvironmentVariables checks for required environment variables and reports any that are missing.
func checkEnvironmentVariables() bool {
	// The required environment variables and their descriptions.
	requiredVars := map[string]string{
		"ALIBABA_CLOUD_ACCESS_KEY_ID":     "Your Alibaba Cloud AccessKey ID",
		"ALIBABA_CLOUD_ACCESS_KEY_SECRET": "Your Alibaba Cloud AccessKey secret",
		"WORKSPACE_ID":                    "Your Model Studio workspace ID",
	}

	var missingVars []string
	for varName, desc := range requiredVars {
		if os.Getenv(varName) == "" {
			fmt.Printf("Error: Set the %s environment variable (%s).\n", varName, desc)
			missingVars = append(missingVars, varName)
		}
	}

	return len(missingVars) == 0
}

// createClient creates and configures a client.
//
// Returns:
//   - *bailian20231229.Client: The configured client.
//   - error: The error message.
func createClient() (_result *bailian20231229.Client, _err error) {
	config := &openapi.Config{
		AccessKeyId:     tea.String(os.Getenv("ALIBABA_CLOUD_ACCESS_KEY_ID")),
		AccessKeySecret: tea.String(os.Getenv("ALIBABA_CLOUD_ACCESS_KEY_SECRET")),
	}
	// This is a public cloud endpoint. You can change it as needed.
	config.Endpoint = tea.String("bailian.ap-southeast-1.aliyuncs.com")
	_result = &bailian20231229.Client{}
	_result, _err = bailian20231229.NewClient(config)
	return _result, _err
}

// retrieveIndex retrieves information from a specified knowledge base.
//
// Parameters:
//   - client (*bailian20231229.Client): The client.
//   - workspaceId (string): The workspace ID.
//   - indexId (string): The knowledge base ID.
//   - query (string): The search query.
//
// Returns:
//   - *bailian20231229.RetrieveResponse: The response from the Model Studio service.
//   - error: The error message.
func retrieveIndex(client *bailian20231229.Client, workspaceId, indexId, query string) (*bailian20231229.RetrieveResponse, error) {
	headers := make(map[string]*string)
	request := &bailian20231229.RetrieveRequest{
		IndexId: tea.String(indexId),
		Query:   tea.String(query),
	}
	runtime := &util.RuntimeOptions{}
	return client.RetrieveWithOptions(tea.String(workspaceId), request, headers, runtime)
}

// main is the entry point of the program.
func main() {
	if !checkEnvironmentVariables() {
		fmt.Println("Environment variable validation failed.")
		return
	}

	// Step 1: Create a client.
	fmt.Println("Step 1: Create a client.")
	client, err := createClient()
	if err != nil {
		fmt.Println("Failed to create a client:", err)
		return
	}

	// Step 2: Retrieve from the knowledge base.
	fmt.Println("Step 2: Retrieve from the knowledge base.")
	reader := bufio.NewReader(os.Stdin)
	fmt.Print("Enter the knowledge base ID: ") // This is the Data.Id value returned by the CreateIndex operation. You can also obtain it from the knowledge base page in the Model Studio console.
	indexId, _ := reader.ReadString('\n')
	indexId = strings.TrimSpace(indexId)
	fmt.Print("Enter the search query: ")
	query, _ := reader.ReadString('\n')
	query = strings.TrimSpace(query)
	workspaceId := os.Getenv("WORKSPACE_ID")
	resp, err := retrieveIndex(client, workspaceId, indexId, query)
	if err != nil {
		fmt.Printf("Retrieval failed: %v\n", err)
		return
	}
        jsonStr, _ := util.ToJSONString(resp.Body)
        fmt.Println(tea.StringValue(jsonStr))
}

// This sample code is for reference only. Do not use it in a production environment.
import com.aliyun.bailian20231229.models.*;
import com.aliyun.teautil.models.RuntimeOptions;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.io.File;
import java.io.FileInputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.file.Paths;
import java.security.MessageDigest;
import java.util.*;

public class KnowledgeBaseUpdate {

    /**
     * Checks for required environment variables and prompts if any are missing.
     *
     * @return true if all required environment variables are set, false otherwise.
     */
    public static boolean checkEnvironmentVariables() {
        Map<String, String> requiredVars = new HashMap<>();
        requiredVars.put("ALIBABA_CLOUD_ACCESS_KEY_ID", "Alibaba Cloud AccessKey ID");
        requiredVars.put("ALIBABA_CLOUD_ACCESS_KEY_SECRET", "Alibaba Cloud AccessKey secret");
        requiredVars.put("WORKSPACE_ID", "Alibaba Cloud Model Studio workspace ID");

        List<String> missingVars = new ArrayList<>();
        for (Map.Entry<String, String> entry : requiredVars.entrySet()) {
            String value = System.getenv(entry.getKey());
            if (value == null || value.isEmpty()) {
                missingVars.add(entry.getKey());
                System.out.println("Error: Set the " + entry.getKey() + " environment variable (" + entry.getValue() + ")");
            }
        }

        return missingVars.isEmpty();
    }

    /**
     * Creates and configures a client.
     *
     * @return The configured client.
     */
    public static com.aliyun.bailian20231229.Client createClient() throws Exception {
        com.aliyun.teaopenapi.models.Config config = new com.aliyun.teaopenapi.models.Config()
                .setAccessKeyId(System.getenv("ALIBABA_CLOUD_ACCESS_KEY_ID"))
                .setAccessKeySecret(System.getenv("ALIBABA_CLOUD_ACCESS_KEY_SECRET"));
        // The following is a public endpoint. Change it to match your region.
        config.endpoint = "bailian.ap-southeast-1.aliyuncs.com";
        return new com.aliyun.bailian20231229.Client(config);
    }

    /**
     * Calculates the MD5 hash of a file.
     *
     * @param filePath The local path of the file.
     * @return The MD5 hash of the file.
     */
    public static String calculateMD5(String filePath) throws Exception {
        MessageDigest md = MessageDigest.getInstance("MD5");
        try (FileInputStream fis = new FileInputStream(filePath)) {
            byte[] buffer = new byte[4096];
            int bytesRead;
            while ((bytesRead = fis.read(buffer)) != -1) {
                md.update(buffer, 0, bytesRead);
            }
        }
        StringBuilder sb = new StringBuilder();
        for (byte b : md.digest()) {
            sb.append(String.format("%02x", b & 0xff));
        }
        return sb.toString();
    }

    /**
     * Gets the size of a file in bytes.
     *
     * @param filePath The local path of the file.
     * @return The file size in bytes.
     */
    public static String getFileSize(String filePath) {
        File file = new File(filePath);
        long fileSize = file.length();
        return String.valueOf(fileSize);
    }

    /**
     * Requests a file upload lease.
     *
     * @param client The client object.
     * @param categoryId The category ID.
     * @param fileName The file name.
     * @param fileMd5 The MD5 hash of the file.
     * @param fileSize The file size in bytes.
     * @param workspaceId The workspace ID.
     * @return The response containing the file upload lease.
     */
    public static ApplyFileUploadLeaseResponse applyLease(com.aliyun.bailian20231229.Client client, String categoryId, String fileName, String fileMd5, String fileSize, String workspaceId) throws Exception {
        Map<String, String> headers = new HashMap<>();
        com.aliyun.bailian20231229.models.ApplyFileUploadLeaseRequest applyFileUploadLeaseRequest = new com.aliyun.bailian20231229.models.ApplyFileUploadLeaseRequest();
        applyFileUploadLeaseRequest.setFileName(fileName);
        applyFileUploadLeaseRequest.setMd5(fileMd5);
        applyFileUploadLeaseRequest.setSizeInBytes(fileSize);
        com.aliyun.teautil.models.RuntimeOptions runtime = new com.aliyun.teautil.models.RuntimeOptions();
        ApplyFileUploadLeaseResponse applyFileUploadLeaseResponse = null;
        applyFileUploadLeaseResponse = client.applyFileUploadLeaseWithOptions(categoryId, workspaceId, applyFileUploadLeaseRequest, headers, runtime);
        return applyFileUploadLeaseResponse;
    }

    /**
     * Uploads a file to temporary storage.
     *
     * @param preSignedUrl The pre-signed URL from the upload lease.
     * @param headers The request headers for the upload.
     * @param filePath The local path of the file.
     * @throws Exception if an error occurs during the upload.
     */
    public static void uploadFile(String preSignedUrl, Map<String, String> headers, String filePath) throws Exception {
        File file = new File(filePath);
        if (!file.exists() || !file.isFile()) {
            throw new IllegalArgumentException("The file does not exist or is not a regular file: " + filePath);
        }

        try (FileInputStream fis = new FileInputStream(file)) {
            URL url = new URL(preSignedUrl);
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("PUT");
            conn.setDoOutput(true);

            // Set the upload request headers.
            conn.setRequestProperty("X-bailian-extra", headers.get("X-bailian-extra"));
            conn.setRequestProperty("Content-Type", headers.get("Content-Type"));

            // Read and upload the file in chunks.
            byte[] buffer = new byte[4096];
            int bytesRead;
            while ((bytesRead = fis.read(buffer)) != -1) {
                conn.getOutputStream().write(buffer, 0, bytesRead);
            }

            int responseCode = conn.getResponseCode();
            if (responseCode != 200) {
                throw new RuntimeException("Upload failed: " + responseCode);
            }
        }
    }

    /**
     * Adds a file to a category.
     *
     * @param client The client object.
     * @param leaseId The lease ID.
     * @param parser The parser for the file.
     * @param categoryId The category ID.
     * @param workspaceId The workspace ID.
     * @return The response containing the new file's ID.
     */
    public static AddFileResponse addFile(com.aliyun.bailian20231229.Client client, String leaseId, String parser, String categoryId, String workspaceId) throws Exception {
        Map<String, String> headers = new HashMap<>();
        com.aliyun.bailian20231229.models.AddFileRequest addFileRequest = new com.aliyun.bailian20231229.models.AddFileRequest();
        addFileRequest.setLeaseId(leaseId);
        addFileRequest.setParser(parser);
        addFileRequest.setCategoryId(categoryId);
        com.aliyun.teautil.models.RuntimeOptions runtime = new com.aliyun.teautil.models.RuntimeOptions();
        return client.addFileWithOptions(workspaceId, addFileRequest, headers, runtime);
    }

    /**
     * Gets the basic information of a file.
     *
     * @param client The client object.
     * @param workspaceId The workspace ID.
     * @param fileId The file ID.
     * @return The response containing the file's information.
     */
    public static DescribeFileResponse describeFile(com.aliyun.bailian20231229.Client client, String workspaceId, String fileId) throws Exception {
        Map<String, String> headers = new HashMap<>();
        com.aliyun.teautil.models.RuntimeOptions runtime = new com.aliyun.teautil.models.RuntimeOptions();
        return client.describeFileWithOptions(workspaceId, fileId, headers, runtime);
    }

    /**
     * Submits a job to add documents to a knowledge base index.
     *
     * @param client The client.
     * @param workspaceId The workspace ID.
     * @param indexId The knowledge base ID.
     * @param fileId The file ID.
     * @param sourceType The data type.
     * @return The response containing the job ID.
     */
    public static SubmitIndexAddDocumentsJobResponse submitIndexAddDocumentsJob(com.aliyun.bailian20231229.Client client, String workspaceId, String indexId, String fileId, String sourceType) throws Exception {
        Map<String, String> headers = new HashMap<>();
        SubmitIndexAddDocumentsJobRequest submitIndexAddDocumentsJobRequest = new SubmitIndexAddDocumentsJobRequest();
        submitIndexAddDocumentsJobRequest.setIndexId(indexId);
        submitIndexAddDocumentsJobRequest.setDocumentIds(Collections.singletonList(fileId));
        submitIndexAddDocumentsJobRequest.setSourceType(sourceType);
        RuntimeOptions runtime = new RuntimeOptions();
        return client.submitIndexAddDocumentsJobWithOptions(workspaceId, submitIndexAddDocumentsJobRequest, headers, runtime);
    }

    /**
     * Queries the status of an index job.
     *
     * @param client The client object.
     * @param workspaceId The workspace ID.
     * @param jobId The job ID.
     * @param indexId The knowledge base ID.
     * @return The response containing the index job's status.
     */
    public static GetIndexJobStatusResponse getIndexJobStatus(com.aliyun.bailian20231229.Client client, String workspaceId, String jobId, String indexId) throws Exception {
        Map<String, String> headers = new HashMap<>();
        com.aliyun.bailian20231229.models.GetIndexJobStatusRequest getIndexJobStatusRequest = new com.aliyun.bailian20231229.models.GetIndexJobStatusRequest();
        getIndexJobStatusRequest.setIndexId(indexId);
        getIndexJobStatusRequest.setJobId(jobId);
        com.aliyun.teautil.models.RuntimeOptions runtime = new com.aliyun.teautil.models.RuntimeOptions();
        GetIndexJobStatusResponse getIndexJobStatusResponse = null;
        getIndexJobStatusResponse = client.getIndexJobStatusWithOptions(workspaceId, getIndexJobStatusRequest, headers, runtime);
        return getIndexJobStatusResponse;
    }

    /**
     * Deletes documents from a knowledge base index.
     *
     * @param client The client.
     * @param workspaceId The workspace ID.
     * @param indexId The knowledge base ID.
     * @param fileId The file ID.
     * @return The response from the Alibaba Cloud Model Studio service.
     */
    public static DeleteIndexDocumentResponse deleteIndexDocument(com.aliyun.bailian20231229.Client client, String workspaceId, String indexId, String fileId) throws Exception {
        Map<String, String> headers = new HashMap<>();
        DeleteIndexDocumentRequest deleteIndexDocumentRequest = new DeleteIndexDocumentRequest();
        deleteIndexDocumentRequest.setIndexId(indexId);
        deleteIndexDocumentRequest.setDocumentIds(Collections.singletonList(fileId));
        com.aliyun.teautil.models.RuntimeOptions runtime = new com.aliyun.teautil.models.RuntimeOptions();
        return client.deleteIndexDocumentWithOptions(workspaceId, deleteIndexDocumentRequest, headers, runtime);
    }

    /**
     * Updates a knowledge base by using the Alibaba Cloud Model Studio service.
     *
     * @param filePath The local path of the updated file.
     * @param workspaceId The workspace ID.
     * @param indexId The ID of the knowledge base to update.
     * @param oldFileId The ID of the file to be replaced.
     * @return The indexId if the update is successful; otherwise, null. */ public static String updateKnowledgeBase(String filePath, String workspaceId, String indexId, String oldFileId) { // Set default values. String categoryId = "default"; String parser = "DASHSCOPE_DOCMIND"; String sourceType = "DATA_CENTER_FILE"; try { // Step 1: Initialize the client. System.out.println("Step 1: Create a client."); com.aliyun.bailian20231229.Client client = createClient(); // Step 2: Prepare file information for the updated file. System.out.println("Step 2: Prepare file information."); String fileName = Paths.get(filePath).getFileName().toString(); String fileMd5 = calculateMD5(filePath); String fileSize = getFileSize(filePath); // Step 3: Request an upload lease. System.out.println("Step 3: Request an upload lease from Alibaba Cloud Model Studio."); ApplyFileUploadLeaseResponse leaseResponse = applyLease(client, categoryId, fileName, fileMd5, fileSize, workspaceId); String leaseId = leaseResponse.getBody().getData().getFileUploadLeaseId(); String uploadUrl = leaseResponse.getBody().getData().getParam().getUrl(); Object uploadHeaders = leaseResponse.getBody().getData().getParam().getHeaders(); // Step 4: Upload the file to temporary storage. System.out.println("Step 4: Upload the file to temporary storage."); // Install the jackson-databind dependency. // Convert the uploadHeaders object to a Map. ObjectMapper mapper = new ObjectMapper(); Map<String, String> uploadHeadersMap = (Map<String, String>) mapper.readValue(mapper.writeValueAsString(uploadHeaders), Map.class); uploadFile(uploadUrl, uploadHeadersMap, filePath); // Step 5: Add the file to the category. System.out.println("Step 5: Add the file to the category."); AddFileResponse addResponse = addFile(client, leaseId, parser, categoryId, workspaceId); String fileId = addResponse.getBody().getData().getFileId(); // Step 6: Check the status of the updated file. System.out.println("Step 6: Check the file status in Alibaba Cloud Model Studio."); while (true) { DescribeFileResponse describeResponse = describeFile(client, workspaceId, fileId); String status = describeResponse.getBody().getData().getStatus(); System.out.println("Current file status: " + status); if ("INIT".equals(status)) { System.out.println("The file is pending parsing. Please wait..."); } else if ("PARSING".equals(status)) { System.out.println("The file is being parsed. Please wait..."); } else if ("PARSE_SUCCESS".equals(status)) { System.out.println("The file is parsed successfully."); break; } else { System.out.println("Unknown file status: " + status + ". Contact technical support."); return null; } Thread.sleep(5000); } // Step 7: Submit a job to add the file to the index. System.out.println("Step 7: Submit a job to add the file to the index."); SubmitIndexAddDocumentsJobResponse indexAddResponse = submitIndexAddDocumentsJob(client, workspaceId, indexId, fileId, sourceType); String jobId = indexAddResponse.getBody().getData().getId(); // Step 8: Wait for the job to complete. System.out.println("Step 8: Wait for the job to complete."); while (true) { GetIndexJobStatusResponse jobStatusResponse = getIndexJobStatus(client, workspaceId, jobId, indexId); String status = jobStatusResponse.getBody().getData().getStatus(); System.out.println("Current index job status: " + status); if ("COMPLETED".equals(status)) { break; } Thread.sleep(5000); } // Step 9: Delete the old document from the index. System.out.println("Step 9: Delete the old document from the index."); deleteIndexDocument(client, workspaceId, indexId, oldFileId); System.out.println("The Alibaba Cloud Model Studio knowledge base is updated successfully."); return indexId; } catch (Exception e) { System.out.println("An error occurred: " + e.getMessage()); return null; } } /** * The main method. */ public static void main(String[] args) { if (!checkEnvironmentVariables()) { System.out.println("Environment variable check failed."); return; } Scanner scanner = new Scanner(System.in); System.out.print("Enter the local path of the updated file to upload (for example, /home/user/Alibaba_Cloud_Model_Studio_Phone_Series_Introduction.docx on a Linux system):"); String filePath = scanner.nextLine(); System.out.print("Enter the ID of the knowledge base to update:"); // This is the Data.Id returned by the CreateIndex operation. You can also obtain the ID on the knowledge base page in the Alibaba Cloud Model Studio console. String indexId = scanner.nextLine(); System.out.print("Enter the FileID of the file to be replaced:"); // This is the FileId returned by the AddFile operation. You can also obtain the file ID by clicking the ID icon next to the file name on the application data page in the Alibaba Cloud Model Studio console. String oldFileId = scanner.nextLine(); String workspaceId = System.getenv("WORKSPACE_ID"); String result = updateKnowledgeBase(filePath, workspaceId, indexId, oldFileId); if (result != null) { System.out.println("Knowledge base updated successfully. Knowledge base ID: " + result); } else { System.out.println("Failed to update the knowledge base."); } } } 

<?php
// This sample code is for reference only. Do not use it in a production environment.
namespace AlibabaCloud\SDK\Sample;

use AlibabaCloud\Dara\Models\RuntimeOptions;
use AlibabaCloud\SDK\Bailian\V20231229\Bailian;
use AlibabaCloud\SDK\Bailian\V20231229\Models\AddFileRequest;
use \Exception;

use Darabonba\OpenApi\Models\Config;
use AlibabaCloud\SDK\Bailian\V20231229\Models\ApplyFileUploadLeaseRequest;
use AlibabaCloud\SDK\Bailian\V20231229\Models\DeleteIndexDocumentRequest;
use AlibabaCloud\SDK\Bailian\V20231229\Models\GetIndexJobStatusRequest;
use AlibabaCloud\SDK\Bailian\V20231229\Models\SubmitIndexAddDocumentsJobRequest;

class KnowledgeBaseUpdate {

    /**
    * Checks if the required environment variables are set.
    *
    * @return bool Returns true if all required environment variables are set, false otherwise.
    */
    public static function checkEnvironmentVariables() {
        $requiredVars = [
            'ALIBABA_CLOUD_ACCESS_KEY_ID' => 'Alibaba Cloud AccessKey ID',
            'ALIBABA_CLOUD_ACCESS_KEY_SECRET' => 'Alibaba Cloud AccessKey secret',
            'WORKSPACE_ID' => 'Alibaba Cloud Model Studio workspace ID'
        ];
        $missingVars = [];
        foreach ($requiredVars as $var => $description) {
            if (!getenv($var)) {
                $missingVars[] = $var;
                echo "Error: Please set the $var environment variable ($description)\n";
            }
        }
        return count($missingVars) === 0;
    }

    /**
     * Calculates the MD5 hash of a file.
     *
     * @param string $filePath The local path of the file.
     * @return string The MD5 hash of the file.
     */
    public static function calculateMd5($filePath) {
        $md5Hash = hash_init("md5");
        $handle = fopen($filePath, "rb");
        while (!feof($handle)) {
            $chunk = fread($handle, 4096);
            hash_update($md5Hash, $chunk);
        }
        fclose($handle);
        return hash_final($md5Hash);
    }

    /**
     * Gets the size of a file in bytes.
     *
     * @param string $filePath The local path of the file.
     * @return int The file size in bytes.
     */
    public static function getFileSize($filePath) {
        return (string)filesize($filePath);
    }

    /**
     * Initializes the client.
     *
     * @return Bailian The configured client object.
     */
    public static function createClient(){
        $config = new Config([
            "accessKeyId" => getenv("ALIBABA_CLOUD_ACCESS_KEY_ID"), 
            "accessKeySecret" => getenv("ALIBABA_CLOUD_ACCESS_KEY_SECRET")
        ]);
        // The following endpoint is for the Asia Pacific SE 1 (Singapore) region. You can change the endpoint as needed.
        $config->endpoint = 'bailian.ap-southeast-1.aliyuncs.com';
        return new Bailian($config);
    }

    /**
     * Requests a file upload lease.
     *
     * @param Bailian $client The client.
     * @param string $categoryId The category ID.
     * @param string $fileName The file name.
     * @param string $fileMd5 The MD5 hash of the file.
     * @param int $fileSize The file size in bytes.
     * @param string $workspaceId The workspace ID.
     * @return ApplyFileUploadLeaseResponse The response from the Alibaba Cloud Model Studio service.
     */
    public static function applyLease($client, $categoryId, $fileName, $fileMd5, $fileSize, $workspaceId) {
        $headers = [];
        $applyFileUploadLeaseRequest = new ApplyFileUploadLeaseRequest([
            "fileName" => $fileName,
            "md5" => $fileMd5,
            "sizeInBytes" => $fileSize
        ]);
        $runtime = new RuntimeOptions([]);
        return $client->applyFileUploadLeaseWithOptions($categoryId, $workspaceId, $applyFileUploadLeaseRequest, $headers, $runtime);
    }

    /**
     * Uploads the file to temporary storage.
    *
    * @param string $preSignedUrl The URL in the upload lease.
    * @param array $headers The request headers for the upload.
    * @param string $filePath The local path of the file.
    */
    public static function uploadFile($preSignedUrl, $headers, $filePath) {
        $fileContent = file_get_contents($filePath);
        // Set the upload request headers.
        $uploadHeaders = [
            "X-bailian-extra" => $headers["X-bailian-extra"],
            "Content-Type" => $headers["Content-Type"]
        ];
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $preSignedUrl);
        curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "PUT");
        curl_setopt($ch, CURLOPT_POSTFIELDS, $fileContent);
        curl_setopt($ch, CURLOPT_HTTPHEADER, array_map(function($key, $value) {
            return "$key: $value";
        }, array_keys($uploadHeaders), $uploadHeaders));
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        $response = curl_exec($ch);
        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        if ($httpCode != 200) {
            throw new Exception("Upload failed: " . curl_error($ch));
        }
        curl_close($ch);
    }

    /**
     * Adds the file to a category.
     *
     * @param Bailian $client The client.
     * @param string $leaseId The lease ID.
     * @param string $parser The parser for the file.
     * @param string $categoryId The category ID.
     * @param string $workspaceId The workspace ID.
     * @return AddFileResponse The response from the Alibaba Cloud Model Studio service.
     */
    public static function addFile($client, $leaseId, $parser, $categoryId, $workspaceId) {
        $headers = [];
        $addFileRequest = new AddFileRequest([
            "leaseId" => $leaseId,
            "parser" => $parser,
            "categoryId" => $categoryId
        ]);
        $runtime = new RuntimeOptions([]);
        return $client->addFileWithOptions($workspaceId, $addFileRequest, $headers, $runtime);
    }

    /**
     * Gets information about a file.
     *
     * @param Bailian $client The client.
     * @param string $workspaceId The workspace ID.
     * @param string $fileId The file ID.
     * @return DescribeFileResponse The response from the Alibaba Cloud Model Studio service.
     */
    public static function describeFile($client, $workspaceId, $fileId) {
        $headers = [];
        $runtime = new RuntimeOptions([]);
        return $client->describeFileWithOptions($workspaceId, $fileId, $headers, $runtime);
    }

    /**
     * Appends a parsed file to a knowledge base.
     *
     * @param Bailian $client The client object.
     * @param string $workspaceId The workspace ID.
     * @param string $indexId The knowledge base ID.
     * @param string $fileId The file ID.
     * @param string $sourceType The data type.
     * @return SubmitIndexAddDocumentsJobResponse The response from the Alibaba Cloud Model Studio service.
     * @throws Exception
     */
    public static function submitIndexAddDocumentsJob($client, $workspaceId, $indexId, $fileId, $sourceType) {
        $headers = [];
        $submitIndexAddDocumentsJobRequest = new SubmitIndexAddDocumentsJobRequest([
            "indexId" =>$indexId,
            "sourceType" => $sourceType,
            "documentIds" => [
                $fileId
            ]
        ]);
        $runtime = new RuntimeOptions([]);
        return $client->submitIndexAddDocumentsJobWithOptions($workspaceId, $submitIndexAddDocumentsJobRequest, $headers, $runtime);
    }

    /**
     * Queries the status of an index job.
     *
     * @param Bailian $client The client.
     * @param string $workspaceId The workspace ID.
     * @param string $indexId The knowledge base ID.
     * @param string $jobId The job ID.
     * @return GetIndexJobStatusResponse The response from the Alibaba Cloud Model Studio service.
     */
    public static function getIndexJobStatus($client, $workspaceId, $jobId, $indexId) {
        $headers = [];
        $getIndexJobStatusRequest = new GetIndexJobStatusRequest([
            'indexId' => $indexId,
            'jobId' => $jobId
        ]);
        $runtime = new RuntimeOptions([]);
        return $client->getIndexJobStatusWithOptions($workspaceId, $getIndexJobStatusRequest, $headers, $runtime);
    }

    /**
     * Permanently deletes a file from a knowledge base.
     *
     * @param Bailian $client The client object.
     * @param string $workspaceId The workspace ID.
     * @param string $indexId The knowledge base ID.
     * @param string $fileId The file ID.
     * @return mixed The response from the Alibaba Cloud Model Studio service.
     * @throws Exception
     */
    public static function deleteIndexDocument($client, $workspaceId, $indexId, $fileId) {
        $headers = [];
        $deleteIndexDocumentRequest = new DeleteIndexDocumentRequest([
            "indexId" => $indexId,
            "documentIds" => [
                $fileId
            ]
        ]);
        $runtime = new RuntimeOptions([]);
        return $client->deleteIndexDocumentWithOptions($workspaceId, $deleteIndexDocumentRequest, $headers, $runtime);
    }

    /**
     * Updates a knowledge base.
     *
     * @param string $filePath The local path of the updated file.
     * @param string $workspaceId The workspace ID.
     * @param string $indexId The ID of the knowledge base to update.
     * @param string $oldFileId The FileID of the file to update.
     * @return string| null The knowledge base ID on success, or null on failure.
     */
    public static function updateKnowledgeBase($filePath, $workspaceId, $indexId, $oldFileId) {
        $categoryId = "default";
        $parser = "DASHSCOPE_DOCMIND";
        $sourceType = "DATA_CENTER_FILE";

        try {
            // Step 1: Create a client.
            echo "Step 1: Create a client.\n";
            $client = self::createClient();

            // Step 2: Prepare file information.
            echo "Step 2: Prepare file information.\n";
            $fileName = basename($filePath);
            $fileMd5 = self::calculateMD5($filePath);
            $fileSize = self::getFileSize($filePath);

            // Step 3: Request an upload lease.
            echo "Step 3: Request an upload lease.\n";
            $leaseResponse = self::applyLease($client, $categoryId, $fileName, $fileMd5, $fileSize, $workspaceId);
            $leaseId = $leaseResponse->body->data->fileUploadLeaseId;
            $uploadUrl = $leaseResponse->body->data->param->url;
            $uploadHeaders = $leaseResponse->body->data->param->headers;
            $uploadHeadersMap = json_decode(json_encode($uploadHeaders), true);

            // Step 4: Upload the file to temporary storage.
            echo "Step 4: Upload the file to temporary storage.\n";
            self::uploadFile($uploadUrl, $uploadHeadersMap, $filePath);

            // Step 5: Add the file to the category.
            echo "Step 5: Add the file to the category.\n";
            $addResponse = self::addFile($client, $leaseId, $parser, $categoryId, $workspaceId);
            $fileId = $addResponse->body->data->fileId;

            // Step 6: Check the file status.
            echo "Step 6: Check the file status.\n";
            while (true) {
                $describeResponse = self::describeFile($client, $workspaceId, $fileId);
                $status = $describeResponse->body->data->status;
                echo "Current file status: " . $status . "\n";

                if ($status === "INIT") {
                    echo "The file is pending parsing. Please wait...\n";
                } elseif ($status === "PARSING") {
                    echo "The file is being parsed. Please wait...\n";
                } elseif ($status === "PARSE_SUCCESS") {
                    echo "File parsed successfully.\n";
                    break;
                } else {
                    echo "Unknown file status: " . $status . ". Please contact technical support.\n";
                    return null;
                }
                sleep(5);
            }

            // Step 7: Submit an index job to add the file.
            echo "Step 7: Submit an index job to add the file.\n";
            $indexAddResponse = self::submitIndexAddDocumentsJob($client, $workspaceId, $indexId, $fileId, $sourceType);
            $jobId = $indexAddResponse->body->data->id;

            // Step 8: Wait for the index job to complete.
            echo "Step 8: Wait for the index job to complete.\n";
            while (true) {
                $jobStatusResponse = self::getIndexJobStatus($client, $workspaceId, $jobId, $indexId);
                $status = $jobStatusResponse->body->data->status;
                echo "Current index job status: " . $status . "\n";

                if ($status === "COMPLETED") {
                    break;
                }
                sleep(5);
            }

            // Step 9: Delete the old file.
            echo "Step 9: Delete the old file.\n";
            self::deleteIndexDocument($client, $workspaceId, $indexId, $oldFileId);

            echo "Knowledge base updated successfully.\n";
            return $indexId;

        } catch (Exception $e) {
            echo "An error occurred: " . $e->getMessage() . "\n";
            return null;
        }
    }

    /**
     * Main function to orchestrate the knowledge base update process.
     */
    public static function main($args){
        if (!self::checkEnvironmentVariables()) {
            echo "The environment variable check failed.\n";
            return;
        }
        $filePath = readline("Enter the local path of the file to upload (e.g., /path/to/your_file.docx):");
        $indexId = readline("Enter the ID of the knowledge base to update:"); // This is the Data.Id returned by the CreateIndex operation. You can also get the ID on the knowledge base page in the Model Studio console.
        $oldFileId = readline("Enter the FileID of the file to update:"); // This is the FileId returned by the AddFile operation. You can also get the file ID by clicking the ID icon next to the file name on the application data page in the Model Studio console.
        $workspaceId = getenv('WORKSPACE_ID');
        $result = self::updateKnowledgeBase($filePath, $workspaceId, $indexId, $oldFileId);

        if ($result !== null) {
            echo "Knowledge base updated successfully. ID: " . $result . "\n";
        } else {
            echo "Failed to update the knowledge base.\n";
        }
    }
}
// This script assumes autoload.php is in the parent directory. Adjust the path for your project structure.
$path = __DIR__ . \DIRECTORY_SEPARATOR . '..' . \DIRECTORY_SEPARATOR . 'vendor' . \DIRECTORY_SEPARATOR . 'autoload.php';
if (file_exists($path)) {
    require_once $path;
}
KnowledgeBaseUpdate::main(array_slice($argv, 1));

// This sample code is for reference only. Do not use it in a production environment.
'use strict';

const fs = require('fs');
const path = require('path');
const axios = require('axios');
const crypto = require('crypto');

const bailian20231229 = require('@alicloud/bailian20231229');
const OpenApi = require('@alicloud/openapi-client');
const Util = require('@alicloud/tea-util');
const Tea = require('@alicloud/tea-typescript');

class KbUpdate {

    /**
     * Verifies that the required environment variables are set.
     * @returns {boolean} - Returns true if all required environment variables are set; otherwise, returns false.
     */
    static checkEnvironmentVariables() {
        const requiredVars = {
            'ALIBABA_CLOUD_ACCESS_KEY_ID': 'Alibaba Cloud AccessKey ID',
            'ALIBABA_CLOUD_ACCESS_KEY_SECRET': 'Alibaba Cloud AccessKey Secret',
            'WORKSPACE_ID': 'Alibaba Cloud Model Studio workspace ID'
        };

        const missing = [];
        for (const [varName, desc] of Object.entries(requiredVars)) {
            if (!process.env[varName]) {
                console.error(`Error: Please set the ${varName} environment variable (${desc}).`);
                missing.push(varName);
            }
        }
        return missing.length === 0;
    }

    /**
     * Calculates the MD5 hash of a file.
     * @param {string} filePath - The local path to the file.
     * @returns {Promise<string>} - The MD5 hash of the file.
     */
    static async calculateMD5(filePath) {
        const hash = crypto.createHash('md5');
        const stream = fs.createReadStream(filePath);

        return new Promise((resolve, reject) => {
            stream.on('data', chunk => hash.update(chunk));
            stream.on('end', () => resolve(hash.digest('hex')));
            stream.on('error', reject);
        });
    }

    /**
     * Gets the size of a file in bytes and returns it as a string.
     * @param {string} filePath - The local path to the file.
     * @returns {string} - The file size, for example, "123456".
     */
    static getFileSize(filePath) {
        try {
            const stats = fs.statSync(filePath);
            return stats.size.toString();
        } catch (err) {
            console.error(`Failed to get file size: ${err.message}`);
            throw err;
        }
    }

    /**
     * Creates and configures a client.
     * @return Client
     * @throws Exception
     */
    static createClient() {
        const config = new OpenApi.Config({
            accessKeyId: process.env.ALIBABA_CLOUD_ACCESS_KEY_ID,
            accessKeySecret: process.env.ALIBABA_CLOUD_ACCESS_KEY_SECRET
        });
        // This endpoint is for the public cloud in the Asia Pacific SE 1 (Singapore) region. Change it as needed.
        config.endpoint = `bailian.ap-southeast-1.aliyuncs.com`;
        return new bailian20231229.default(config);
    }

    /**
     * Requests a file upload lease.
     * @param {Bailian20231229Client} client - The client.
     * @param {string} categoryId - The category ID.
     * @param {string} fileName - The file name.
     * @param {string} fileMd5 - The MD5 hash of the file.
     * @param {string} fileSize - The file size in bytes.
     * @param {string} workspaceId - The workspace ID.
     * @returns {Promise<bailian20231229.ApplyFileUploadLeaseResponse>} - The response from the Alibaba Cloud Model Studio service.
     */
    static async applyLease(client, categoryId, fileName, fileMd5, fileSize, workspaceId) {
        const headers = {};
        const req = new bailian20231229.ApplyFileUploadLeaseRequest({
            md5: fileMd5,
            fileName,
            sizeInBytes: fileSize
        });
        const runtime = new Util.RuntimeOptions({});
        return await client.applyFileUploadLeaseWithOptions(
            categoryId,
            workspaceId,
            req,
            headers,
            runtime
        );
    }

    /**
     * Uploads the file to temporary storage.
     * @param {string} preSignedUrl - The pre-signed URL from the upload lease.
     * @param {Object} headers - The request headers for the upload.
     * @param {string} filePath - The local path to the file.
     */
    static async uploadFile(preSignedUrl, headers, filePath) {
        const uploadHeaders = {
            "X-bailian-extra": headers["X-bailian-extra"],
            "Content-Type": headers["Content-Type"]
        };
        const stream = fs.createReadStream(filePath);
        try {
            await axios.put(preSignedUrl, stream, { headers: uploadHeaders });
        } catch (e) {
            throw new Error(`Upload failed: ${e.message}`);
        }
    }

    /**
     * Adds a file to a category.
     * @param {Bailian20231229Client} client - The client.
     * @param {string} leaseId - The lease ID.
     * @param {string} parser - The parser for the file.
     * @param {string} categoryId - The category ID.
     * @param {string} workspaceId - The workspace ID.
     * @returns {Promise<bailian20231229.AddFileResponse>} - The response from the Alibaba Cloud Model Studio service.
     */
    static async addFile(client, leaseId, parser, categoryId, workspaceId) {
        const headers = {};
        const req = new bailian20231229.AddFileRequest({
            leaseId,
            parser,
            categoryId
        });
        const runtime = new Util.RuntimeOptions({});
        return await client.addFileWithOptions(workspaceId, req, headers, runtime);
    }

    /**
     * Queries the parsing status of a file.
     * @param {Bailian20231229Client} client - The client.
     * @param {string} workspaceId - The workspace ID.
     * @param {string} fileId - The file ID.
     * @returns {Promise<bailian20231229.DescribeFileResponse>} - The response from the Alibaba Cloud Model Studio service.
     */
    static async describeFile(client, workspaceId, fileId) {
        const headers = {};
        const runtime = new Util.RuntimeOptions({});
        return await client.describeFileWithOptions(workspaceId, fileId, headers, runtime);
    }

    /**
     * Submits a job to add documents to an index.
     * @param {Bailian20231229Client} client - The client.
     * @param {string} workspaceId - The workspace ID.
     * @param {string} indexId - The knowledge base ID.
     * @param {string} fileId - The file ID.
     * @param {string} sourceType - The data type.
     * @returns {Promise<bailian20231229.SubmitIndexAddDocumentsJobResponse>} - The response from the Alibaba Cloud Model Studio service.
     */
    static async submitIndexAddDocumentsJob(client, workspaceId, indexId, fileId, sourceType) {
        const headers = {};
        const req = new bailian20231229.SubmitIndexAddDocumentsJobRequest({
            indexId,
            documentIds: [fileId],
            sourceType,
        });
        const runtime = new Util.RuntimeOptions({});
        return await client.submitIndexAddDocumentsJobWithOptions(workspaceId, req, headers, runtime);
    }

    /**
     * Queries the status of an index job.
     * @param {Bailian20231229Client} client - The client.
     * @param {string} workspaceId - The workspace ID.
     * @param {string} jobId - The job ID.
     * @param {string} indexId - The knowledge base ID.
     * @returns {Promise<bailian20231229.GetIndexJobStatusResponse>} - The response from the Alibaba Cloud Model Studio service.
     */
    static async getIndexJobStatus(client, workspaceId, jobId, indexId) {
        const headers = {};
        const req = new bailian20231229.GetIndexJobStatusRequest({ jobId, indexId });
        const runtime = new Util.RuntimeOptions({});
        return await client.getIndexJobStatusWithOptions(workspaceId, req, headers, runtime);
    }

    /**
     * Deletes a document from the knowledge base index.
     * @param {Bailian20231229Client} client - The client.
     * @param {string} workspaceId - The workspace ID.
     * @param {string} indexId - The knowledge base ID.
     * @param {string} fileId - The ID of the document to delete.
     * @returns {Promise<bailian20231229.DeleteIndexDocumentResponse>} - The response from the Alibaba Cloud Model Studio service.
     */
    static async deleteIndexDocument(client, workspaceId, indexId, fileId) {
        const headers = {};
        const req = new bailian20231229.DeleteIndexDocumentRequest({
            indexId,
            documentIds: [fileId],
        });
        const runtime = new Util.RuntimeOptions({});
        return await client.deleteIndexDocumentWithOptions(workspaceId, req, headers, runtime);
    }

    /**
     * Updates a knowledge base in Alibaba Cloud Model Studio.
     * @param {string} filePath - The local path to the updated file.
     * @param {string} workspaceId - The workspace ID.
     * @param {string} indexId - The ID of the knowledge base to update.
     * @param {string} oldFileId - The ID of the file to replace.
     * @returns {Promise<string | null>} - The knowledge base ID if successful; otherwise, null.
     */
    static async updateKnowledgeBase(filePath, workspaceId, indexId, oldFileId) {
        const categoryId = 'default';
        const parser = 'DASHSCOPE_DOCMIND';
        const sourceType = 'DATA_CENTER_FILE';

        try {
            console.log("Step 1: Creating a client.");
            const client = this.createClient();

            console.log("Step 2: Preparing file information.");
            const fileName = path.basename(filePath);
            const fileMd5 = await this.calculateMD5(filePath);
            const fileSize = this.getFileSize(filePath);

            console.log("Step 3: Applying for a file upload lease from Alibaba Cloud Model Studio.");
            const leaseRes = await this.applyLease(client, categoryId, fileName, fileMd5, fileSize, workspaceId);
            const leaseId = leaseRes.body.data.fileUploadLeaseId;
            const uploadUrl = leaseRes.body.data.param.url;
            const uploadHeaders = leaseRes.body.data.param.headers;

            console.log("Step 4: Uploading the file to temporary storage.");
            await this.uploadFile(uploadUrl, uploadHeaders, filePath);

            console.log("Step 5: Adding the file to the category.");
            const addRes = await this.addFile(client, leaseId, parser, categoryId, workspaceId);
            const fileId = addRes.body.data.fileId;

            console.log("Step 6: Checking the file status in Alibaba Cloud Model Studio.");
            while (true) {
                const descRes = await this.describeFile(client, workspaceId, fileId);
                const status = descRes.body.data.status;
                console.log(`Current file status: ${status}`);

                if (status === 'INIT') {
                    console.log("File is awaiting parsing. Please wait...");
                } else if (status === 'PARSING') {
                    console.log("File is being parsed. Please wait...");
                } else if (status === 'PARSE_SUCCESS') {
                    console.log("File parsed successfully.");
                    break;
                } else {
                    console.error(`Unknown file status: ${status}. Please contact technical support.`);
                    return null;
                }
                await this.sleep(5);
            }

            console.log("Step 7: Submitting a job to add documents to the index.");
            const indexAddResponse = await this.submitIndexAddDocumentsJob(client, workspaceId, indexId, fileId, sourceType);
            const jobId = indexAddResponse.body.data.id;

            console.log("Step 8: Waiting for the indexing job to complete.");
            while (true) {
                const getJobStatusResponse = await this.getIndexJobStatus(client, workspaceId, jobId, indexId);
                const status = getJobStatusResponse.body.data.status;
                console.log(`Current indexing job status: ${status}`);
                if (status === 'COMPLETED') {
                    break;
                }
                await this.sleep(5);
            }

            console.log("Step 9: Deleting the old document from the index.");
            await this.deleteIndexDocument(client, workspaceId, indexId, oldFileId);

            console.log("Knowledge base updated successfully.");
            return indexId;
        } catch (e) {
            console.error(`An error occurred: ${e.message}`);
            return null;
        }
    }

    /**
     * Waits for a specified number of seconds.
     * @param {number} seconds - The wait time in seconds.
     * @returns {Promise<void>}
     */
    static sleep(seconds) {
        return new Promise(resolve => setTimeout(resolve, seconds * 1000));
    }

    static async main(args) {
        if (!this.checkEnvironmentVariables()) {
            console.log("Environment variable check failed.");
            return;
        }

        const readline = require('readline').createInterface({
            input: process.stdin,
            output: process.stdout
        });

        try {
            const filePath = await new Promise((resolve, reject) => {
                readline.question("Enter the local path to the updated file (e.g., on Linux: /home/user/Alibaba_Cloud_Model_Studio_Phone_Series_Introduction.docx):", (ans) => {
                    ans.trim() ? resolve(ans) : reject(new Error("The path cannot be empty."));
                });
            });
            const indexId = await new Promise((resolve, reject) => {
                // The knowledge base ID is the Data.Id returned by the CreateIndex operation. You can also find this ID on the knowledge base page in the Model Studio console.
                readline.question("Enter the knowledge base ID to update:", (ans) => {
                    ans.trim() ? resolve(ans) : reject(new Error("The knowledge base ID cannot be empty."));
                });
            });
            const oldFileId = await new Promise((resolve, reject) => {
                // The file ID is the FileId returned by the AddFile operation. You can also find the file ID by clicking the ID icon next to the file name on the application data page in the Model Studio console.
                readline.question("Enter the ID of the file to replace:", (ans) => {
                    ans.trim() ? resolve(ans) : reject(new Error("The file ID cannot be empty."));
                });
            });
            const workspaceId = process.env.WORKSPACE_ID;

            const result = await this.updateKnowledgeBase(filePath, workspaceId, indexId, oldFileId);
            if (result) console.log(`Knowledge base ID: ${result}`);
            else console.log("Failed to update the knowledge base.");
        } catch (err) {
            console.error(err.message);
        } finally {
            readline.close();
        }
    }
}

exports.KbUpdate = KbUpdate;
KbUpdate.main(process.argv.slice(2));

// This sample code is for reference only. Do not use it in a production environment.
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
using Newtonsoft.Json;

using Tea;
using Tea.Utils;

namespace AlibabaCloud.SDK.KnowledgeBase
{
    public class KnowledgeBaseUpdate
    {
        /// <summary>
        /// Checks if the required environment variables are set.
        /// </summary>
        /// <returns>Returns <see langword="true"/> if all required environment variables are set; otherwise, <see langword="false"/>.</returns>
        public static bool CheckEnvironmentVariables()
        {
            var requiredVars = new Dictionary<string, string>
            {
                { "ALIBABA_CLOUD_ACCESS_KEY_ID", "Alibaba Cloud AccessKey ID" },
                { "ALIBABA_CLOUD_ACCESS_KEY_SECRET", "Alibaba Cloud AccessKey Secret" },
                { "WORKSPACE_ID", "Alibaba Cloud Model Studio workspace ID" }
            };

            var missingVars = new List<string>();
            foreach (var entry in requiredVars)
            {
                string value = Environment.GetEnvironmentVariable(entry.Key);
                if (string.IsNullOrEmpty(value))
                {
                    missingVars.Add(entry.Key);
                    Console.WriteLine($"Error: Please set the {entry.Key} ({entry.Value}) environment variable.");
                }
            }

            return missingVars.Count == 0;
        }

        /// <summary>
        /// Calculates the MD5 hash of a file.
        /// </summary>
        /// <param name="filePath">The local path of the file.</param>
        /// <returns>The MD5 hash of the file.</returns>
        /// <exception cref="Exception">Thrown when an error occurs during calculation.</exception>
        public static string CalculateMD5(string filePath)
        {
            using (var md5 = MD5.Create())
            {
                using (var stream = new FileStream(filePath, FileMode.Open, FileAccess.Read))
                {
                    byte[] hashBytes = md5.ComputeHash(stream);
                    StringBuilder sb = new StringBuilder();
                    foreach (byte b in hashBytes)
                    {
                        sb.Append(b.ToString("x2"));
                    }
                    return sb.ToString();
                }
            }
        }

        /// <summary>
        /// Gets the size of a file in bytes.
        /// </summary>
        /// <param name="filePath">The local path of the file.</param>
        /// <returns>The file size in bytes.</returns>
        public static string GetFileSize(string filePath)
        {
            var file = new FileInfo(filePath);
            return file.Length.ToString();
        }

        /// <summary>
        /// Initializes the client.
        /// </summary>
        /// <returns>A configured client object.</returns>
        /// <exception cref="Exception">Thrown when an error occurs during initialization.</exception>
        public static AlibabaCloud.SDK.Bailian20231229.Client CreateClient()
        {
            var config = new AlibabaCloud.OpenApiClient.Models.Config
            {
                AccessKeyId = Environment.GetEnvironmentVariable("ALIBABA_CLOUD_ACCESS_KEY_ID"),
                AccessKeySecret = Environment.GetEnvironmentVariable("ALIBABA_CLOUD_ACCESS_KEY_SECRET"),
            };
            // The endpoint below is the public endpoint for the Asia Pacific SE 1 (Singapore) region. You can change it as needed.
            config.Endpoint = "bailian.ap-southeast-1.aliyuncs.com";
            return new AlibabaCloud.SDK.Bailian20231229.Client(config);
        }

        /// <summary>
        /// Requests a file upload lease.
        /// </summary>
        /// <param name="client">The client object.</param>
        /// <param name="categoryId">The category ID.</param>
        /// <param name="fileName">The name of the file.</param>
        /// <param name="fileMd5">The MD5 hash of the file.</param>
        /// <param name="fileSize">The file size in bytes.</param>
        /// <param name="workspaceId">The workspace ID.</param>
        /// <returns>The response from the service.</returns>
        /// <exception cref="Exception">Thrown when an error occurs during the API call.</exception>
        public static AlibabaCloud.SDK.Bailian20231229.Models.ApplyFileUploadLeaseResponse ApplyLease(
            AlibabaCloud.SDK.Bailian20231229.Client client,
            string categoryId,
            string fileName,
            string fileMd5,
            string fileSize,
            string workspaceId)
        {
            var headers = new Dictionary<string, string>() { };
            var applyFileUploadLeaseRequest = new AlibabaCloud.SDK.Bailian20231229.Models.ApplyFileUploadLeaseRequest
            {
                FileName = fileName,
                Md5 = fileMd5,
                SizeInBytes = fileSize
            };
            var runtime = new AlibabaCloud.TeaUtil.Models.RuntimeOptions();
            return client.ApplyFileUploadLeaseWithOptions(categoryId, workspaceId, applyFileUploadLeaseRequest, headers, runtime);
        }

        /// <summary>
        /// Uploads a file to temporary storage.
        /// </summary>
        /// <param name="preSignedUrl">The pre-signed URL from the upload lease.</param>
        /// <param name="headers">The request headers for the upload.</param>
        /// <param name="filePath">The local path of the file.</param>
        /// <exception cref="Exception">Thrown when an error occurs during the upload.</exception>
        public static void UploadFile(string preSignedUrl, Dictionary<string, string> headers, string filePath)
        {
            var file = new FileInfo(filePath);
            if (!File.Exists(filePath))
            {
                throw new ArgumentException($"File does not exist or is not a regular file: {filePath}");
            }

            using (var fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
            {
                var url = new Uri(preSignedUrl);
                var conn = (HttpWebRequest)WebRequest.Create(url);
                conn.Method = "PUT";
                conn.ContentType = headers["Content-Type"];
                conn.Headers.Add("X-bailian-extra", headers["X-bailian-extra"]);

                byte[] buffer = new byte[4096];
                int bytesRead;
                while ((bytesRead = fs.Read(buffer, 0, buffer.Length)) > 0)
                {
                    conn.GetRequestStream().Write(buffer, 0, bytesRead);
                }

                using (var response = (HttpWebResponse)conn.GetResponse())
                {
                    if (response.StatusCode != HttpStatusCode.OK)
                    {
                        throw new Exception($"Upload failed with status code: {response.StatusCode}");
                    }
                }
            }
        }

        /// <summary>
        /// Adds a file to a category.
        /// </summary>
        /// <param name="client">The client object.</param>
        /// <param name="leaseId">The lease ID.</param>
        /// <param name="parser">The parser to use for the file.</param>
        /// <param name="categoryId">The category ID.</param>
        /// <param name="workspaceId">The workspace ID.</param>
        /// <returns>The response from the service.</returns>
        /// <exception cref="Exception">Thrown when an error occurs during the API call.</exception>
        public static AlibabaCloud.SDK.Bailian20231229.Models.AddFileResponse AddFile(
            AlibabaCloud.SDK.Bailian20231229.Client client,
            string leaseId,
            string parser,
            string categoryId,
            string workspaceId)
        {
            var headers = new Dictionary<string, string>() { };
            var addFileRequest = new AlibabaCloud.SDK.Bailian20231229.Models.AddFileRequest
            {
                LeaseId = leaseId,
                Parser = parser,
                CategoryId = categoryId
            };
            var runtime = new AlibabaCloud.TeaUtil.Models.RuntimeOptions();
            return client.AddFileWithOptions(workspaceId, addFileRequest, headers, runtime);
        }

        /// <summary>
        /// Gets the basic information of a file.
        /// </summary>
        /// <param name="client">The client object.</param>
        /// <param name="workspaceId">The workspace ID.</param>
        /// <param name="fileId">The file ID.</param>
        /// <returns>The response from the service.</returns>
        /// <exception cref="Exception">Thrown when an error occurs during the API call.</exception>
        public static AlibabaCloud.SDK.Bailian20231229.Models.DescribeFileResponse DescribeFile(
            AlibabaCloud.SDK.Bailian20231229.Client client,
            string workspaceId,
            string fileId)
        {
            var headers = new Dictionary<string, string>() { };
            var runtime = new AlibabaCloud.TeaUtil.Models.RuntimeOptions();
            return client.DescribeFileWithOptions(workspaceId, fileId, headers, runtime);
        }

        /// <summary>
        /// Appends a parsed file to a document-retrieval knowledge base.
        /// </summary>
        /// <param name="client">The client object.</param>
        /// <param name="workspaceId">The workspace ID.</param>
        /// <param name="indexId">The index ID.</param>
        /// <param name="fileId">The file ID.</param>
        /// <param name="sourceType">The source type of the data.</param>
        /// <returns>The response from the service.</returns>
        public static AlibabaCloud.SDK.Bailian20231229.Models.SubmitIndexAddDocumentsJobResponse SubmitIndexAddDocumentsJob(
            AlibabaCloud.SDK.Bailian20231229.Client client,
            string workspaceId,
            string indexId,
            string fileId,
            string sourceType)
        {
            var headers = new Dictionary<string, string>() { };
            var submitIndexAddDocumentsJobRequest = new AlibabaCloud.SDK.Bailian20231229.Models.SubmitIndexAddDocumentsJobRequest
            {
                IndexId = indexId,
                DocumentIds = new List<string> { fileId },
                SourceType = sourceType
            };
            var runtime = new AlibabaCloud.TeaUtil.Models.RuntimeOptions();
            return client.SubmitIndexAddDocumentsJobWithOptions(workspaceId, submitIndexAddDocumentsJobRequest, headers, runtime);
        }

        /// <summary>
        /// Queries the status of an index job.
        /// </summary>
        /// <param name="client">The client object.</param>
        /// <param name="workspaceId">The workspace ID.</param>
        /// <param name="jobId">The job ID.</param>
        /// <param name="indexId">The index ID.</param>
        /// <returns>The response from the service.</returns>
        /// <exception cref="Exception">Thrown when an error occurs during the API call.</exception>
        public static AlibabaCloud.SDK.Bailian20231229.Models.GetIndexJobStatusResponse GetIndexJobStatus(
            AlibabaCloud.SDK.Bailian20231229.Client client,
            string workspaceId,
            string jobId,
            string indexId)
        {
            var headers = new Dictionary<string, string>() { };
            var getIndexJobStatusRequest = new AlibabaCloud.SDK.Bailian20231229.Models.GetIndexJobStatusRequest
            {
                IndexId = indexId,
                JobId = jobId
            };
            var runtime = new AlibabaCloud.TeaUtil.Models.RuntimeOptions();
            return client.GetIndexJobStatusWithOptions(workspaceId, getIndexJobStatusRequest, headers, runtime);
        }

        /// <summary>
        /// Deletes one or more documents from a knowledge base index.
        /// </summary>
        /// <param name="client">The client object.</param>
        /// <param name="workspaceId">The workspace ID.</param>
        /// <param name="indexId">The index ID.</param>
        /// <param name="fileId">The file ID.</param>
        /// <returns>The response from the service.</returns>
        public static AlibabaCloud.SDK.Bailian20231229.Models.DeleteIndexDocumentResponse DeleteIndexDocument(
            AlibabaCloud.SDK.Bailian20231229.Client client,
            string workspaceId,
            string indexId,
            string fileId)
        {
            var headers = new Dictionary<string, string>() { };
            var deleteIndexDocumentRequest = new AlibabaCloud.SDK.Bailian20231229.Models.DeleteIndexDocumentRequest
            {
                IndexId = indexId,
                DocumentIds = new List<string> { fileId }
            };
            var runtime = new AlibabaCloud.TeaUtil.Models.RuntimeOptions();
            return client.DeleteIndexDocumentWithOptions(workspaceId, deleteIndexDocumentRequest, headers, runtime);
        }

        /// <summary>
        /// Updates a knowledge base.
        /// </summary>
        /// <param name="filePath">The local path of the updated file.</param>
        /// <param name="workspaceId">The workspace ID.</param>
        /// <param name="indexId">The ID of the index to update.</param>
        /// <param name="oldFileId">The file ID of the file to be replaced.</param>
        /// <returns>The ID of the index if successful; otherwise, <see langword="null"/>.</returns>
        public static string UpdateKnowledgeBase(string filePath, string workspaceId, string indexId, string oldFileId)
        {
            // Set default values.
            string categoryId = "default";
            string parser = "DASHSCOPE_DOCMIND";
            string sourceType = "DATA_CENTER_FILE";

            try
            {
                Console.WriteLine("Step 1: Create a client.");
                var client = CreateClient();

                Console.WriteLine("Step 2: Prepare file information.");
                string fileName = Path.GetFileName(filePath);
                string fileMd5 = CalculateMD5(filePath);
                string fileSize = GetFileSize(filePath);

                Console.WriteLine("Step 3: Request an upload lease.");
                Bailian20231229.Models.ApplyFileUploadLeaseResponse leaseResponse = ApplyLease(client, categoryId, fileName, fileMd5, fileSize, workspaceId);
                string leaseId = leaseResponse.Body.Data.FileUploadLeaseId;
                string uploadUrl = leaseResponse.Body.Data.Param.Url;
                var uploadHeaders = leaseResponse.Body.Data.Param.Headers;

                Console.WriteLine("Step 4: Upload the file to temporary storage.");
                // Make sure the Newtonsoft.Json package is installed.
                var uploadHeadersMap = JsonConvert.DeserializeObject<Dictionary<string, string>>(JsonConvert.SerializeObject(uploadHeaders));
                UploadFile(uploadUrl, uploadHeadersMap, filePath);

                Console.WriteLine("Step 5: Add the file to the category.");
                Bailian20231229.Models.AddFileResponse addResponse = AddFile(client, leaseId, parser, categoryId, workspaceId);
                string fileId = addResponse.Body.Data.FileId;

                Console.WriteLine("Step 6: Check the file status.");
                while (true)
                {
                    Bailian20231229.Models.DescribeFileResponse describeResponse = DescribeFile(client, workspaceId, fileId);
                    string status = describeResponse.Body.Data.Status;
                    Console.WriteLine("Current file status: " + status);
                    if ("INIT".Equals(status))
                    {
                        Console.WriteLine("File is awaiting parsing. Please wait...");
                    }
                    else if ("PARSING".Equals(status))
                    {
                        Console.WriteLine("File parsing is in progress. Please wait...");
                    }
                    else if ("PARSE_SUCCESS".Equals(status))
                    {
                        Console.WriteLine("File parsing is complete!");
                        break;
                    }
                    else
                    {
                        Console.WriteLine("Unknown file status: " + status + ". Please contact technical support.");
                        return null;
                    }
                    System.Threading.Thread.Sleep(5000);
                }

                Console.WriteLine("Step 7: Submit a job to add the file to the index.");
                Bailian20231229.Models.SubmitIndexAddDocumentsJobResponse indexAddResponse = SubmitIndexAddDocumentsJob(client, workspaceId, indexId, fileId, sourceType);
                string jobId = indexAddResponse.Body.Data.Id;

                Console.WriteLine("Step 8: Wait for the indexing job to complete.");
                while (true)
                {
                    Bailian20231229.Models.GetIndexJobStatusResponse jobStatusResponse = GetIndexJobStatus(client, workspaceId, jobId, indexId);
                    string status = jobStatusResponse.Body.Data.Status;
                    Console.WriteLine("Current index job status: " + status);
                    if ("COMPLETED".Equals(status))
                    {
                        break;
                    }
                    System.Threading.Thread.Sleep(5000);
                }

                Console.WriteLine("Step 9: Delete the old file.");
                DeleteIndexDocument(client, workspaceId, indexId, oldFileId);

                Console.WriteLine("The knowledge base has been updated successfully!");
                return indexId;
            }
            catch (Exception e)
            {
                Console.WriteLine("An error occurred: " + e.Message);
                return null;
            }
        }

        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        public static void Main(string[] args)
        {
            if (!CheckEnvironmentVariables())
            {
                Console.WriteLine("Environment variable validation failed.");
                return;
            }

            Console.Write("Enter the local path of the file to upload (e.g., /path/to/YourDocument.docx): ");
            string filePath = Console.ReadLine();

            Console.Write("Enter the ID of the knowledge base to update: "); // This is the `Data.Id` returned by the `CreateIndex` API call. Alternatively, you can find it on the knowledge bases page in the Alibaba Cloud Model Studio console.
            string indexId = Console.ReadLine();

            Console.Write("Enter the file ID of the file to be replaced: "); // This is the `FileId` returned by the `AddFile` API call. Alternatively, you can find it by clicking the ID icon next to a file name on the application data page in the Alibaba Cloud Model Studio console.
            string oldFileId = Console.ReadLine();

            string workspaceId = Environment.GetEnvironmentVariable("WORKSPACE_ID");
            string result = UpdateKnowledgeBase(filePath, workspaceId, indexId, oldFileId);
            if (result != null)
            {
                Console.WriteLine("The knowledge base has been updated successfully. Knowledge base ID: " + result);
            }
            else
            {
                Console.WriteLine("Failed to update the knowledge base.");
            }
        }
    }
}

// This sample code is for reference only. Do not use it in a production environment.
package main

import (
	"bufio"
	"crypto/md5"
	"encoding/json"
	"fmt"
	"io"
	"os"
	"path/filepath"
	"strings"
	"time"

	bailian20231229 "github.com/alibabacloud-go/bailian-20231229/v2/client"
	openapi "github.com/alibabacloud-go/darabonba-openapi/v2/client"
	util "github.com/alibabacloud-go/tea-utils/v2/service"
	"github.com/alibabacloud-go/tea/tea"
	"github.com/go-resty/resty/v2"
)

// CheckEnvironmentVariables checks for and prompts you to set the required environment variables.
func CheckEnvironmentVariables() bool {
	// The required environment variables and their descriptions.
	requiredVars := map[string]string{
		"ALIBABA_CLOUD_ACCESS_KEY_ID":     "Alibaba Cloud AccessKey ID",
		"ALIBABA_CLOUD_ACCESS_KEY_SECRET": "Alibaba Cloud AccessKey Secret",
		"WORKSPACE_ID":                    "Alibaba Cloud Model Studio workspace ID",
	}

	var missingVars []string
	for varName, desc := range requiredVars {
		if os.Getenv(varName) == "" {
			fmt.Printf("Error: Set the %s environment variable (%s).\n", varName, desc)
			missingVars = append(missingVars, varName)
		}
	}

	return len(missingVars) == 0
}

// CalculateMD5 calculates the MD5 hash of a file.
//
// Parameters:
//   - filePath (string): The local path of the file.
//
// Returns:
//   - string: The MD5 hash of the file.
//   - error: The error message.
func CalculateMD5(filePath string) (_result string, _err error) {
	file, err := os.Open(filePath)
	if err != nil {
		return "", err
	}
	defer file.Close()

	md5Hash := md5.New()
	_, err = io.Copy(md5Hash, file)
	if err != nil {
		return "", err
	}

	return fmt.Sprintf("%x", md5Hash.Sum(nil)), nil
}

// GetFileSize gets the size of a file in bytes.
//
// Parameters:
//   - filePath (string): The local path of the file.
//
// Returns:
//   - string: The file size in bytes.
//   - error: The error message.
func GetFileSize(filePath string) (_result string, _err error) {
	info, err := os.Stat(filePath)
	if err != nil {
		return "", err
	}
	return fmt.Sprintf("%d", info.Size()), nil
}

// CreateClient creates and configures a client.
//
// Returns:
//   - *bailian20231229.Client: The configured client.
//   - error: The error message.
func CreateClient() (_result *bailian20231229.Client, _err error) {
	config := &openapi.Config{
		AccessKeyId:     tea.String(os.Getenv("ALIBABA_CLOUD_ACCESS_KEY_ID")),
		AccessKeySecret: tea.String(os.Getenv("ALIBABA_CLOUD_ACCESS_KEY_SECRET")),
	}
	// This example uses the public endpoint for the Asia Pacific SE 1 (Singapore) region. You can change the endpoint as needed.
	config.Endpoint = tea.String("bailian.ap-southeast-1.aliyuncs.com")
	_result = &bailian20231229.Client{}
	_result, _err = bailian20231229.NewClient(config)
	return _result, _err
}

// ApplyLease requests a file upload lease from the Alibaba Cloud Model Studio service.
//
// Parameters:
//   - client (*bailian20231229.Client): The client.
//   - categoryId (string): The category ID.
//   - fileName (string): The file name.
//   - fileMD5 (string): The MD5 hash of the file.
//   - fileSize (string): The file size in bytes.
//   - workspaceId (string): The workspace ID.
//
// Returns:
//   - *bailian20231229.ApplyFileUploadLeaseResponse: The response from the Alibaba Cloud Model Studio service.
//   - error: The error message.
func ApplyLease(client *bailian20231229.Client, categoryId, fileName, fileMD5 string, fileSize string, workspaceId string) (_result *bailian20231229.ApplyFileUploadLeaseResponse, _err error) {
	headers := make(map[string]*string)
	applyFileUploadLeaseRequest := &bailian20231229.ApplyFileUploadLeaseRequest{
		FileName:    tea.String(fileName),
		Md5:         tea.String(fileMD5),
		SizeInBytes: tea.String(fileSize),
	}
	runtime := &util.RuntimeOptions{}
	return client.ApplyFileUploadLeaseWithOptions(tea.String(categoryId), tea.String(workspaceId), applyFileUploadLeaseRequest, headers, runtime)
}

// UploadFile uploads a file to the Alibaba Cloud Model Studio service.
//
// Parameters:
//   - preSignedUrl (string): The URL in the upload lease.
//   - headers (map[string]string): The request headers for the upload.
//   - filePath (string): The local path of the file.
func UploadFile(preSignedUrl string, headers map[string]string, filePath string) error {
	file, err := os.Open(filePath)
	if err != nil {
		return err
	}
	defer file.Close()

	body, err := io.ReadAll(file)
	if err != nil {
		return err
	}

	client := resty.New()
	uploadHeaders := map[string]string{
		"X-bailian-extra": headers["X-bailian-extra"],
		"Content-Type":    headers["Content-Type"],
	}

	resp, err := client.R().
		SetHeaders(uploadHeaders).
		SetBody(body).
		Put(preSignedUrl)

	if err != nil {
		return err
	}

	if resp.IsError() {
		return fmt.Errorf("HTTP error: %d", resp.StatusCode())
	}

	return nil
}

// AddFile adds a file to a specified category in the Alibaba Cloud Model Studio service.
//
// Parameters:
//   - client (*bailian20231229.Client): The client.
//   - leaseId (string): The lease ID.
//   - parser (string): The parser for the file.
//   - categoryId (string): The category ID.
//   - workspaceId (string): The workspace ID.
//
// Returns:
//   - *bailian20231229.AddFileResponse: The response from the Alibaba Cloud Model Studio service.
//   - error: The error message.
func AddFile(client *bailian20231229.Client, leaseId, parser, categoryId, workspaceId string) (_result *bailian20231229.AddFileResponse, _err error) {
	headers := make(map[string]*string)
	addFileRequest := &bailian20231229.AddFileRequest{
		LeaseId:    tea.String(leaseId),
		Parser:     tea.String(parser),
		CategoryId: tea.String(categoryId),
	}
	runtime := &util.RuntimeOptions{}
	return client.AddFileWithOptions(tea.String(workspaceId), addFileRequest, headers, runtime)
}

// DescribeFile gets the basic information of a file.
//
// Parameters:
//   - client (*bailian20231229.Client): The client.
//   - workspaceId (string): The workspace ID.
//   - fileId (string): The file ID.
//
// Returns:
//   - *bailian20231229.DescribeFileResponse: The response from the Alibaba Cloud Model Studio service.
//   - error: The error message.
func DescribeFile(client *bailian20231229.Client, workspaceId, fileId string) (_result *bailian20231229.DescribeFileResponse, _err error) {
	headers := make(map[string]*string)
	runtime := &util.RuntimeOptions{}
	return client.DescribeFileWithOptions(tea.String(workspaceId), tea.String(fileId), headers, runtime)
}

// SubmitIndexAddDocumentsJob appends a parsed file to a knowledge base.
//
// Parameters:
//   - client (*bailian20231229.Client): The client.
//   - workspaceId (string): The workspace ID.
//   - indexId (string): The knowledge base ID.
//   - fileId (string): The file ID.
//   - sourceType (string): The data type.
//
// Returns:
//   - *bailian20231229.SubmitIndexAddDocumentsJobResponse: The response from the Alibaba Cloud Model Studio service.
//   - error: The error message.
func SubmitIndexAddDocumentsJob(client *bailian20231229.Client, workspaceId, indexId, fileId, sourceType string) (_result *bailian20231229.SubmitIndexAddDocumentsJobResponse, _err error) {
	headers := make(map[string]*string)
	submitIndexAddDocumentsJobRequest := &bailian20231229.SubmitIndexAddDocumentsJobRequest{
		IndexId:     tea.String(indexId),
		SourceType:  tea.String(sourceType),
		DocumentIds: []*string{tea.String(fileId)},
	}
	runtime := &util.RuntimeOptions{}
	return client.SubmitIndexAddDocumentsJobWithOptions(tea.String(workspaceId), submitIndexAddDocumentsJobRequest, headers, runtime)
}

// GetIndexJobStatus queries the status of an index job.
//
// Parameters:
//   - client (*bailian20231229.Client): The client.
//   - workspaceId (string): The workspace ID.
//   - jobId (string): The job ID.
//   - indexId (string): The knowledge base ID.
//
// Returns:
//   - *bailian20231229.GetIndexJobStatusResponse: The response from the Alibaba Cloud Model Studio service.
//   - error: The error message.
func GetIndexJobStatus(client *bailian20231229.Client, workspaceId, jobId, indexId string) (_result *bailian20231229.GetIndexJobStatusResponse, _err error) {
	headers := make(map[string]*string)
	getIndexJobStatusRequest := &bailian20231229.GetIndexJobStatusRequest{
		JobId:   tea.String(jobId),
		IndexId: tea.String(indexId),
	}
	runtime := &util.RuntimeOptions{}
	return client.GetIndexJobStatusWithOptions(tea.String(workspaceId), getIndexJobStatusRequest, headers, runtime)
}

// DeleteIndexDocument permanently deletes one or more files from a specified knowledge base.
//
// Parameters:
//   - client (*bailian20231229.Client): The client.
//   - workspaceId (string): The workspace ID.
//   - indexId (string): The knowledge base ID.
//   - fileId (string): The file ID.
//
// Returns:
//   - *bailian20231229.DeleteIndexDocumentResponse: The response from the Alibaba Cloud Model Studio service.
//   - error: The error message.
func DeleteIndexDocument(client *bailian20231229.Client, workspaceId, indexId, fileId string) (*bailian20231229.DeleteIndexDocumentResponse, error) {
	headers := make(map[string]*string)
	deleteIndexDocumentRequest := &bailian20231229.DeleteIndexDocumentRequest{
		IndexId:     tea.String(indexId),
		DocumentIds: []*string{tea.String(fileId)},
	}
	runtime := &util.RuntimeOptions{}
	return client.DeleteIndexDocumentWithOptions(tea.String(workspaceId), deleteIndexDocumentRequest, headers, runtime)
}

// UpdateKnowledgeBase updates a knowledge base.
//
// Parameters:
//   - filePath (string): The local path of the updated file.
//   - workspaceId (string): The workspace ID.
//   - indexId (string): The ID of the knowledge base to update.
//   - oldFileId (string): The file ID of the file to update.
//
// Returns:
//   - string: The ID of the knowledge base if the update is successful, or an empty string otherwise.
//   - error: The error message.
func UpdateKnowledgeBase(filePath, workspaceId, indexId, oldFileId string) (_result string, _err error) {
	// Set default values.
	categoryId := "default"
	parser := "DASHSCOPE_DOCMIND"
	sourceType := "DATA_CENTER_FILE"

	fmt.Println("Step 1: Create a client.")
	client, err := CreateClient()
	if err != nil {
		return "", err
	}

	fmt.Println("Step 2: Prepare file information.")
	fileName := filepath.Base(filePath)
	fileMD5, err := CalculateMD5(filePath)
	if err != nil {
		return "", err
	}
	fileSizeStr, err := GetFileSize(filePath)
	if err != nil {
		return "", err
	}

	fmt.Println("Step 3: Request an upload lease from Alibaba Cloud Model Studio.")
	leaseResponse, err := ApplyLease(client, categoryId, fileName, fileMD5, fileSizeStr, workspaceId)
	if err != nil {
		return "", err
	}

	leaseId := tea.StringValue(leaseResponse.Body.Data.FileUploadLeaseId)
	uploadURL := tea.StringValue(leaseResponse.Body.Data.Param.Url)
	uploadHeaders := leaseResponse.Body.Data.Param.Headers

	jsonData, err := json.Marshal(uploadHeaders)
	if err != nil {
		return "", err
	}

	var uploadHeadersMap map[string]string
	err = json.Unmarshal(jsonData, &uploadHeadersMap)
	if err != nil {
		return "", err
	}

	fmt.Println("Step 4: Upload the file to temporary storage.")
	err = UploadFile(uploadURL, uploadHeadersMap, filePath)
	if err != nil {
		return "", err
	}

	fmt.Println("Step 5: Add the file to the category.")
	addResponse, err := AddFile(client, leaseId, parser, categoryId, workspaceId)
	if err != nil {
		return "", err
	}
	fileId := tea.StringValue(addResponse.Body.Data.FileId)

	fmt.Println("Step 6: Check the file status in Alibaba Cloud Model Studio.")
	for {
		describeResponse, err := DescribeFile(client, workspaceId, fileId)
		if err != nil {
			return "", err
		}

		status := tea.StringValue(describeResponse.Body.Data.Status)
		fmt.Printf("Current file status: %s\n", status)

		if status == "INIT" {
			fmt.Println("The file is pending parsing. Please wait...")
		} else if status == "PARSING" {
			fmt.Println("The file is being parsed. Please wait...")
		} else if status == "PARSE_SUCCESS" {
			fmt.Println("The file was parsed successfully.")
			break
		} else {
			fmt.Printf("Unknown file status: %s. Contact technical support.\n", status)
			return "", fmt.Errorf("unknown file status: %s", status)
		}
		time.Sleep(5 * time.Second)
	}

	// Submit a task to append the file.
	fmt.Println("Step 7: Submit a task to append the file.")
	indexAddResponse, err := SubmitIndexAddDocumentsJob(client, workspaceId, indexId, fileId, sourceType)
	if err != nil {
		return "", err
	}
	jobId := tea.StringValue(indexAddResponse.Body.Data.Id)

	// Wait for the task to complete.
	fmt.Println("Step 8: Wait for the append task to complete.")
	for {
		getIndexJobStatusResponse, err := GetIndexJobStatus(client, workspaceId, jobId, indexId)
		if err != nil {
			return "", err
		}

		status := tea.StringValue(getIndexJobStatusResponse.Body.Data.Status)
		fmt.Printf("Current index job status: %s\n", status)

		if status == "COMPLETED" {
			break
		}
		time.Sleep(5 * time.Second)
	}

	// Delete the old file.
	fmt.Println("Step 9: Delete the old file.")
	_, err = DeleteIndexDocument(client, workspaceId, indexId, oldFileId)
	if err != nil {
		return "", err
	}

	fmt.Println("The Alibaba Cloud Model Studio knowledge base was updated successfully.")
	return indexId, nil
}

func main() {
	if !CheckEnvironmentVariables() {
		fmt.Println("The environment variable check failed.")
		return
	}
	// Create a scanner to read input.
	reader := bufio.NewReader(os.Stdin)
	fmt.Print("Enter the local path of the updated file to upload (for example, on a Linux system: /path/to/product_introduction.docx):")
	filePath, _ := reader.ReadString('\n')
	filePath = strings.TrimSpace(filePath)

	fmt.Print("Enter the ID of the knowledge base to update:") // This is the Data.Id returned by the CreateIndex operation. You can also obtain the ID on the knowledge base page in the Model Studio console.
	indexId, _ := reader.ReadString('\n')
	indexId = strings.TrimSpace(indexId)

	fmt.Print("Enter the file ID of the file to update:") // This is the FileId returned by the AddFile operation. You can also obtain the file ID by clicking the ID icon next to the file name on the application data page in the Model Studio console.
	oldFileId, _ := reader.ReadString('\n')
	oldFileId = strings.TrimSpace(oldFileId)

	workspaceId := os.Getenv("WORKSPACE_ID")
	result, err := UpdateKnowledgeBase(filePath, workspaceId, indexId, oldFileId)
	if err != nil {
		fmt.Printf("An error occurred: %v\n", err)
		return
	}

	if result != "" {
		fmt.Printf("The knowledge base was updated successfully. The knowledge base ID is: %s\n", result)
	} else {
		fmt.Println("Failed to update the knowledge base.")
	}
}

<?php
// This sample code is for reference only. Do not use it in a production environment.
namespace AlibabaCloud\SDK\KnowledgeBase;

use AlibabaCloud\Dara\Models\RuntimeOptions;
use AlibabaCloud\SDK\Bailian\V20231229\Bailian;
use AlibabaCloud\SDK\Bailian\V20231229\Models\DeleteIndexRequest;
use AlibabaCloud\SDK\Bailian\V20231229\Models\ListIndexDocumentsRequest;
use \Exception;

use Darabonba\OpenApi\Models\Config;

class KnowledgeBaseManage {

    /**
    * Verifies that the required environment variables are set.
    *
    * @return bool Returns true if all required environment variables are set, false otherwise.
    */
    public static function checkEnvironmentVariables() {
        $requiredVars = [
            'ALIBABA_CLOUD_ACCESS_KEY_ID' => 'Alibaba Cloud AccessKey ID',
            'ALIBABA_CLOUD_ACCESS_KEY_SECRET' => 'Alibaba Cloud AccessKey secret',
            'WORKSPACE_ID' => 'Alibaba Cloud Model Studio workspace ID'
        ];
        $missingVars = [];
        foreach ($requiredVars as $var => $description) {
            if (!getenv($var)) {
                $missingVars[] = $var;
                echo "Error: Set the $var environment variable ($description)\n";
            }
        }
        return count($missingVars) === 0;
    }

    /**
     * Initializes the client.
     *
     * @return Bailian The configured client object.
     */
    public static function createClient(){
        $config = new Config([
            "accessKeyId" => getenv("ALIBABA_CLOUD_ACCESS_KEY_ID"), 
            "accessKeySecret" => getenv("ALIBABA_CLOUD_ACCESS_KEY_SECRET")
        ]);
        // This is a public cloud endpoint. Change it if necessary.
        $config->endpoint = 'bailian.ap-southeast-1.aliyuncs.com';
        return new Bailian($config);
    }

     /**
     * Lists the knowledge bases in a specified workspace.
     *
     * @param Bailian $client The client object.
     * @param string $workspaceId The workspace ID.
     * @return ListIndicesResponse The response from the Model Studio service.
     * @throws Exception
     */
    public static function listIndices($client, $workspaceId) {
        $headers = [];
        $listIndexDocumentsRequest = new ListIndexDocumentsRequest([]);
        $runtime = new RuntimeOptions([]);
        return $client->listIndicesWithOptions($workspaceId, $listIndexDocumentsRequest, $headers, $runtime);
    }

    /**
     * Permanently deletes the specified knowledge base.
     *
     * @param Bailian $client The client object.
     * @param string $workspaceId The workspace ID.
     * @param string $indexId The knowledge base ID.
     * @return mixed The response from the Model Studio service.
     * @throws Exception
     */
    public static function deleteIndex($client, $workspaceId, $indexId) {
        $headers = [];
        $deleteIndexRequest = new DeleteIndexRequest([
            "indexId" => $indexId
        ]);
        $runtime = new RuntimeOptions([]);
        return $client->deleteIndexWithOptions($workspaceId, $deleteIndexRequest, $headers, $runtime);
    }

    /**
     * The main function.
     */
    public static function main($args) {
        if (!self::checkEnvironmentVariables()) {
            echo "The environment variable check failed.\n";
            return;
        }

        try {
            echo "Select an operation to perform:\n1. List knowledge bases\n2. Delete a knowledge base\nEnter an option (1 or 2):";
            $startOption = trim(fgets(STDIN));
            $client = self::createClient();
            if ($startOption === "1") {
                // List knowledge bases.
                echo "\nList knowledge bases\n";
                $workspaceId = getenv("WORKSPACE_ID");
                $response = self::listIndices($client, $workspaceId);
                // Convert the response to a JSON string.
                $result = json_encode($response->body->data, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT);
                echo $result . "\n";
            } elseif ($startOption === "2") {
                echo "\nDelete a knowledge base\n";
                $workspaceId = getenv("WORKSPACE_ID");
                $indexId = readline("Enter the knowledge base ID:"); // The ID is returned as `Data.Id` by the CreateIndex operation. You can also find it on the knowledge base page in the Model Studio console.
                // Confirm before deletion.
                while (true) {
                    $confirm = strtolower(trim(readline("Are you sure you want to permanently delete the knowledge base $indexId? (y/n): ")));
                    if ($confirm === 'y') {
                        break;
                    } elseif ($confirm === 'n') {
                        echo "Deletion canceled.\n";
                        return;
                    } else {
                        echo "Invalid input. Enter y or n.\n";
                    }
                }
                $response = self::deleteIndex($client, $workspaceId, $indexId);
                if ($response->body->status == "200")
                    echo "Knowledge base " . $indexId . " has been deleted.\n";
                else 
                    echo "An error occurred: " . json_encode($response->body) . "\n";
            } else {
                echo "Invalid option. Exiting.\n";
            }
        } catch (Exception $e) {
            echo "An error occurred: " . $e->getMessage() . "\n";
        }
    }
}
// Assumes autoload.php is in the parent directory of this file. Adjust the path according to your project structure.
$path = __DIR__ . \DIRECTORY_SEPARATOR . '..' . \DIRECTORY_SEPARATOR . 'vendor' . \DIRECTORY_SEPARATOR . 'autoload.php';
if (file_exists($path)) {
    require_once $path;
}
KnowledgeBaseManage::main(array_slice($argv, 1));

// This sample code is for reference only. Do not use it in a production environment.
'use strict';

const bailian20231229 = require('@alicloud/bailian20231229');
const OpenApi = require('@alicloud/openapi-client');
const Util = require('@alicloud/tea-util');
const Tea = require('@alicloud/tea-typescript');

class KbManage {

    /**
     * Verifies that required environment variables are set.
     * @returns {boolean} True if all required environment variables are set, false otherwise.
     */
    static checkEnvironmentVariables() {
        const requiredVars = {
            'ALIBABA_CLOUD_ACCESS_KEY_ID': 'Alibaba Cloud access key ID',
            'ALIBABA_CLOUD_ACCESS_KEY_SECRET': 'Alibaba Cloud access key secret',
            'WORKSPACE_ID': 'Alibaba Cloud Model Studio workspace ID'
        };

        const missing = [];
        for (const [varName, desc] of Object.entries(requiredVars)) {
            if (!process.env[varName]) {
                console.error(`Error: Set the ${varName} environment variable (${desc})`);
                missing.push(varName);
            }
        }

        return missing.length === 0;
    }

    /**
     * Creates and configures a client.
     * @returns {bailian20231229.default} The configured client.
     * @throws {Error} Throws an error if credentials are not configured.
     */
    static createClient() {
        const config = new OpenApi.Config({
            accessKeyId: process.env.ALIBABA_CLOUD_ACCESS_KEY_ID,
            accessKeySecret: process.env.ALIBABA_CLOUD_ACCESS_KEY_SECRET
        });
        // The following endpoint is for the public cloud. You can change the endpoint as needed.
        config.endpoint = 'bailian.ap-southeast-1.aliyuncs.com';
        return new bailian20231229.default(config);
    }

    /**
     * Lists the knowledge bases in a specified workspace.
     * @param {bailian20231229.Client} client The client instance to use for the request.
     * @param {string} workspaceId The ID of the workspace to query.
     * @returns {Promise<bailian20231229.ListIndicesResponse>} A promise that resolves with the service response.
     */
    static async listIndices(client, workspaceId) {
        const headers = {};
        const listIndicesRequest = new bailian20231229.ListIndicesRequest();
        const runtime = new Util.RuntimeOptions({});
        return await client.listIndicesWithOptions(workspaceId, listIndicesRequest, headers, runtime);
    }

    /**
     * Permanently deletes the specified knowledge base.
     * @param {bailian20231229.Client} client The client instance to use for the request.
     * @param {string} workspaceId The ID of the workspace containing the knowledge base.
     * @param {string} indexId The ID of the knowledge base to delete.
     * @returns {Promise<bailian20231229.DeleteIndexResponse>} A promise that resolves with the service response.
     */
    static async deleteIndex(client, workspaceId, indexId) {
        const headers = {};
        const deleteIndexRequest = new bailian20231229.DeleteIndexRequest({
            indexId
        });
        const runtime = new Util.RuntimeOptions({});
        return await client.deleteIndexWithOptions(workspaceId, deleteIndexRequest, headers, runtime);
    }

    /**
     * Provides a command-line interface to list or delete knowledge bases.
     */
    static async main(args) {
        if (!this.checkEnvironmentVariables()) {
            console.log("Environment variable check failed.");
            return;
        }

        const readline = require('readline').createInterface({
            input: process.stdin,
            output: process.stdout
        });

        try {
            const startOption = await new Promise((resolve) => {
                readline.question("Select an operation to perform:\n1. List knowledge bases\n2. Delete a knowledge base\nEnter an option (1 or 2):", (ans) => {
                    resolve(ans.trim());
                });
            });

            if (startOption === '1') {
                console.log("\nListing knowledge bases...");
                const workspaceId = process.env.WORKSPACE_ID;
                const client = this.createClient();
                const response = await this.listIndices(client, workspaceId);
                console.log(JSON.stringify(response.body.data));
            } else if (startOption === '2') {
                console.log("\nDeleting a knowledge base...");
                const workspaceId = process.env.WORKSPACE_ID;
                const indexId = await new Promise((resolve) => {
                    readline.question("Enter the knowledge base ID: ", (ans) => { // This ID corresponds to the `Data.Id` value from the `CreateIndex` API response. You can also find it on the knowledge base page in the Model Studio console.
                        resolve(ans.trim());
                    });
                });
                // Confirm before deletion.
                let confirm = '';
                while (confirm !== 'y' && confirm !== 'n') {
                    confirm = (await new Promise((resolve) => {
                        readline.question(`Are you sure you want to permanently delete the knowledge base ${indexId}? (y/n): `, (ans) => {
                            resolve(ans.trim().toLowerCase());
                        });
                    })).toLowerCase();
                    if (confirm === 'n') {
                        console.log("Deletion canceled.");
                        return;
                    } else if (confirm !== 'y') {
                        console.log("Invalid input. Please enter y or n.");
                    }
                }
                const client = this.createClient();
                const resp = await this.deleteIndex(client, workspaceId, indexId);
                if (resp.body.status == '200')
                    console.log(`Knowledge base ${indexId} deleted successfully.`);
                else {
                    const errInfo = JSON.stringify(resp.body);
                    console.error(`An error occurred: ${errInfo}`)
                }
            } else {
                console.log("Invalid option. Exiting.");
            }
        } catch (err) {
            console.error(`An error occurred: ${err.message}`);
        } finally {
            readline.close();
        }
    }
}

exports.KbManage = KbManage;
KbManage.main(process.argv.slice(2));

// This sample code is for reference only. Do not use it in a production environment.
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;

using Newtonsoft.Json;
using Tea;
using Tea.Utils;

namespace AlibabaCloud.SDK.KnowledgeBase
{
    public class KnowledgeBaseManage
    {
        /// <summary>
        /// Checks for required environment variables and prompts for missing ones.
        /// </summary>
        /// <returns>`true` if all required environment variables are set; otherwise, `false`.</returns>
        public static bool CheckEnvironmentVariables()
        {
            var requiredVars = new Dictionary<string, string>
            {
                { "ALIBABA_CLOUD_ACCESS_KEY_ID", "Alibaba Cloud AccessKey ID" },
                { "ALIBABA_CLOUD_ACCESS_KEY_SECRET", "Alibaba Cloud AccessKey secret" },
                { "WORKSPACE_ID", "Alibaba Cloud Model Studio workspace ID" }
            };

            var missingVars = new List<string>();
            foreach (var entry in requiredVars)
            {
                string value = Environment.GetEnvironmentVariable(entry.Key);
                if (string.IsNullOrEmpty(value))
                {
                    missingVars.Add(entry.Key);
                    Console.WriteLine($"Error: Please set the {entry.Key} environment variable ({entry.Value})");
                }
            }

            return missingVars.Count == 0;
        }

        /// <summary>
        /// Initializes a client.
        /// </summary>
        /// <returns>The configured client object.</returns>
        /// <exception cref="Exception">An exception is thrown if an error occurs during initialization.</exception>
        public static AlibabaCloud.SDK.Bailian20231229.Client CreateClient()
        {
            var config = new AlibabaCloud.OpenApiClient.Models.Config
            {
                AccessKeyId = Environment.GetEnvironmentVariable("ALIBABA_CLOUD_ACCESS_KEY_ID"),
                AccessKeySecret = Environment.GetEnvironmentVariable("ALIBABA_CLOUD_ACCESS_KEY_SECRET"),
            };
            // The following is an example public endpoint. You can change it as needed.
            config.Endpoint = "bailian.ap-southeast-1.aliyuncs.com";
            return new AlibabaCloud.SDK.Bailian20231229.Client(config);
        }

        /// <summary>
        /// Gets the details of knowledge bases in a specified workspace.
        /// </summary>
        /// <param name="client">The client.</param>
        /// <param name="workspaceId">The workspace ID.</param>
        /// <returns>The response from the Model Studio service.</returns>
        public static AlibabaCloud.SDK.Bailian20231229.Models.ListIndicesResponse ListIndices(AlibabaCloud.SDK.Bailian20231229.Client client, string workspaceId)
        {
            var headers = new Dictionary<string, string>() { };
            var listIndicesRequest = new Bailian20231229.Models.ListIndicesRequest();
            var runtime = new AlibabaCloud.TeaUtil.Models.RuntimeOptions();
            return client.ListIndicesWithOptions(workspaceId, listIndicesRequest, headers, runtime);
        }

        /// <summary>
        /// Permanently deletes the specified knowledge base.
        /// </summary>
        /// <param name="client">The client.</param>
        /// <param name="workspaceId">The workspace ID.</param>
        /// <param name="indexId">The knowledge base ID.</param>
        /// <returns>The response from the Model Studio service.</returns>
        public static AlibabaCloud.SDK.Bailian20231229.Models.DeleteIndexResponse DeleteIndex(AlibabaCloud.SDK.Bailian20231229.Client client, string workspaceId, string indexId)
        {
            var headers = new Dictionary<string, string>() { };
            var deleteIndexRequest = new Bailian20231229.Models.DeleteIndexRequest
            {
                IndexId = indexId
            };
            var runtime = new AlibabaCloud.TeaUtil.Models.RuntimeOptions();
            return client.DeleteIndexWithOptions(workspaceId, deleteIndexRequest, headers, runtime);
        }

        /// <summary>
        /// The main function.
        /// </summary>
        public static void Main(string[] args)
        {
            if (!CheckEnvironmentVariables())
            {
                Console.WriteLine("Environment variable check failed.");
                return;
            }
            try
            {
                Console.Write("Select an operation to perform:\n1. List knowledge bases\n2. Delete a knowledge base\nPlease enter an option (1 or 2):");
                string startOption = Console.ReadLine();
                if (startOption == "1")
                {
                    Console.WriteLine("\nListing knowledge bases...");
                    string workspaceId = Environment.GetEnvironmentVariable("WORKSPACE_ID");
                    Bailian20231229.Client client = CreateClient();
                    Bailian20231229.Models.ListIndicesResponse listIndicesResponse = ListIndices(client, workspaceId);
                    // Install Newtonsoft.Json to serialize the response object to a JSON string.
                    var json = JsonConvert.SerializeObject(listIndicesResponse.Body.Data, Formatting.Indented);
                    Console.WriteLine(json);
                }
                else if (startOption == "2")
                {
                    Console.WriteLine("\nDeleting a knowledge base...");
                    string workspaceId = Environment.GetEnvironmentVariable("WORKSPACE_ID");
                    Console.Write("Please enter the knowledge base ID: "); // The knowledge base ID (Data.Id) is returned by the CreateIndex operation or can be found on the knowledge base page in the Model Studio console.
                    string indexId = Console.ReadLine();
                    // Confirm before deletion.
                    while (true)
                    {
                        Console.Write($"Are you sure you want to permanently delete the knowledge base {indexId}? (y/n): ");
                        string confirm = Console.ReadLine()?.ToLower();
                        if (confirm == "y")
                        {
                            break;
                        }
                        else if (confirm == "n")
                        {
                            Console.WriteLine("Deletion canceled.");
                            return;
                        }
                        else
                        {
                            Console.WriteLine("Invalid input. Please enter y or n.");
                        }
                    }
                    Bailian20231229.Client client = CreateClient();
                    Bailian20231229.Models.DeleteIndexResponse resp = DeleteIndex(client, workspaceId, indexId);
                    if (resp.Body.Status == "200")
                    {
                        Console.WriteLine($"Knowledge base {indexId} was deleted successfully.");
                    }
                    else
                    {
                        var mapper = new JsonSerializerSettings { Formatting = Formatting.Indented };
                        string errInfo = JsonConvert.SerializeObject(resp.Body, mapper);
                        Console.WriteLine($"An error occurred: {errInfo}");
                    }
                }
                else
                {
                    Console.WriteLine("Invalid option. Exiting.");
                    return;
                }
            }
            catch (Exception e)
            {
                Console.WriteLine("An error occurred: " + e.Message);
            }
        }
    }
}

// This sample code is for reference only. Do not use it in a production environment.
package main

import (
	"bufio"
	"fmt"
	"os"
	"strings"

	bailian20231229 "github.com/alibabacloud-go/bailian-20231229/v2/client"
	openapi "github.com/alibabacloud-go/darabonba-openapi/v2/client"
	util "github.com/alibabacloud-go/tea-utils/v2/service"
	"github.com/alibabacloud-go/tea/tea"
)

// checkEnvironmentVariables verifies that the required environment variables are set and reports any that are missing.
func checkEnvironmentVariables() bool {
	// The required environment variables and their descriptions.
	requiredVars := map[string]string{
		"ALIBABA_CLOUD_ACCESS_KEY_ID":     "Alibaba Cloud AccessKey ID",
		"ALIBABA_CLOUD_ACCESS_KEY_SECRET": "Alibaba Cloud AccessKey secret",
		"WORKSPACE_ID":                    "Alibaba Cloud Model Studio workspace ID",
	}

	var missingVars []string
	for varName, desc := range requiredVars {
		if os.Getenv(varName) == "" {
			fmt.Printf("Error: Set the %s environment variable (%s)\n", varName, desc)
			missingVars = append(missingVars, varName)
		}
	}

	return len(missingVars) == 0
}

// createClient creates and configures a client.
//
// Returns:
//   - *bailian20231229.Client: The configured client.
func createClient() (_result *bailian20231229.Client, _err error) {
	config := &openapi.Config{
		AccessKeyId:     tea.String(os.Getenv("ALIBABA_CLOUD_ACCESS_KEY_ID")),
		AccessKeySecret: tea.String(os.Getenv("ALIBABA_CLOUD_ACCESS_KEY_SECRET")),
	}
	// This is a public cloud endpoint. Change this value to the endpoint for your region.
	config.Endpoint = tea.String("bailian.ap-southeast-1.aliyuncs.com")
	_result = &bailian20231229.Client{}
	_result, _err = bailian20231229.NewClient(config)
	return _result, _err
}

// listIndices lists the knowledge bases in a specified workspace.
//
// Parameters:
//   - client      *bailian20231229.Client: The client.
//   - workspaceId string: The workspace ID.
//
// Returns:
//   - *bailian20231229.ListIndicesResponse: The response from the Alibaba Cloud Model Studio service.
//   - error: An error, if one occurred.
func listIndices(client *bailian20231229.Client, workspaceId string) (_result *bailian20231229.ListIndicesResponse, _err error) {
	headers := make(map[string]*string)
	listIndicesRequest := &bailian20231229.ListIndicesRequest{}
	runtime := &util.RuntimeOptions{}
	return client.ListIndicesWithOptions(tea.String(workspaceId), listIndicesRequest, headers, runtime)
}

// deleteIndex permanently deletes the specified knowledge base.
//
// Parameters:
//   - client      *bailian20231229.Client: The client.
//   - workspaceId string: The workspace ID.
//   - indexId     string: The knowledge base ID.
//
// Returns:
//   - *bailian20231229.DeleteIndexResponse: The response from the Alibaba Cloud Model Studio service.
//   - error: An error, if one occurred.
func deleteIndex(client *bailian20231229.Client, workspaceId, indexId string) (_result *bailian20231229.DeleteIndexResponse, _err error) {
	headers := make(map[string]*string)
	deleteIndexRequest := &bailian20231229.DeleteIndexRequest{
		IndexId: tea.String(indexId),
	}
	runtime := &util.RuntimeOptions{}
	return client.DeleteIndexWithOptions(tea.String(workspaceId), deleteIndexRequest, headers, runtime)

}

func main() {
	if !checkEnvironmentVariables() {
		fmt.Println("The environment variable check failed.")
		return
	}

	scanner := bufio.NewScanner(os.Stdin)
	fmt.Print("Select an operation:\n1. List knowledge bases\n2. Delete a knowledge base\nEnter an option (1 or 2): ")

	if !scanner.Scan() {
		fmt.Println("Failed to read input.")
		return
	}
	startOption := scanner.Text()

	client, err := createClient()
	if err != nil {
		fmt.Println("Failed to create the client:", err)
		return
	}

	if strings.TrimSpace(startOption) == "1" {
		fmt.Println("\nListing knowledge bases...")
		workspaceId := os.Getenv("WORKSPACE_ID")
		resp, err := listIndices(client, workspaceId)
		if err != nil {
			fmt.Println("Failed to get the list of knowledge bases:", err)
			return
		}
		fmt.Printf("Knowledge bases:\n%+v\n", resp.Body.Data)
	} else if strings.TrimSpace(startOption) == "2" {
		fmt.Println("\nDeleting a knowledge base...")
		workspaceId := os.Getenv("WORKSPACE_ID")
		fmt.Print("Enter the knowledge base ID: ")
		if !scanner.Scan() {
			fmt.Println("Failed to read the knowledge base ID.")
			return
		}
		indexId := scanner.Text()
		for {
			fmt.Printf("Are you sure you want to permanently delete knowledge base %s? (y/n): ", indexId)
			if !scanner.Scan() {
				fmt.Println("Failed to read confirmation.")
				return
			}
			confirm := strings.ToLower(strings.TrimSpace(scanner.Text()))

			if confirm == "y" {
				break
			} else if confirm == "n" {
				fmt.Println("Deletion canceled.")
				return
			} else {
				fmt.Println("Invalid input. Enter y or n.")
			}
		}
		resp, err := deleteIndex(client, workspaceId, indexId)
		if err != nil {
			fmt.Println("Failed to delete the knowledge base:", err)
		} else {
			if tea.StringValue(resp.Body.Status) == "200" {
				fmt.Printf("Knowledge base %s deleted successfully.\n", indexId)
			} else {
				fmt.Println(resp.Body)
			}
		}
	} else {
		fmt.Println("Invalid option. Exiting program.")
	}
}