Object Storage Service:Configure symbolic links

import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.common.auth.*;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.model.*;

public class Demo {
    public static void main(String[] args) throws Exception {
        // In this example, the endpoint of the China (Hangzhou) region is used. Specify your actual endpoint. 
        String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
        // Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. 
        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
        // Specify the name of the bucket. Example: examplebucket. 
        String bucketName = "examplebucket";
        // Specify the name of the symbolic link that you want to create. 
        String symLink = "yourSymLink";
        // Specify the name of the object to which you want the symbolic link to point. 
        String destinationObjectName = "yourDestinationObjectName";

        // Create an OSSClient instance. 
        OSS ossClient = new OSSClientBuilder().build(endpoint, credentialsProvider);

        try {
            // Create metadata for the object that you want to upload. 
            ObjectMetadata metadata = new ObjectMetadata();
            metadata.setContentType("text/plain");
            // Set the property parameter for the user metadata to property-value. 
            metadata.addUserMetadata("property", "property-value");

            // Specify whether to overwrite the object that has the same name as the symbolic link. 
            // metadata.setHeader("x-oss-forbid-overwrite", "true");
            // Specify the access control list (ACL) of the object. 
            // metadata.setHeader(OSSHeaders.OSS_OBJECT_ACL, CannedAccessControlList.Default);
            // Specify the storage class of the object. 
            // metadata.setHeader(OSSHeaders.OSS_STORAGE_CLASS, StorageClass.Standard);

            // Create a CreateSymlinkRequest to create the symbolic link. 
            CreateSymlinkRequest createSymlinkRequest = new CreateSymlinkRequest(bucketName, symLink, destinationObjectName);

            // Configure the metadata. 
            createSymlinkRequest.setMetadata(metadata);

            // Create the symbolic link. 
            ossClient.createSymlink(createSymlinkRequest);

        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }
}            

<?php
if (is_file(__DIR__ . '/../autoload.php')) {
    require_once __DIR__ . '/../autoload.php';
}
if (is_file(__DIR__ . '/../vendor/autoload.php')) {
    require_once __DIR__ . '/../vendor/autoload.php';
}

use OSS\OssClient;
use OSS\Core\OssException;

// The AccessKey pair of an Alibaba Cloud account has permissions on all API operations. Using these credentials to perform operations in OSS is a high-risk operation. We recommend that you use a RAM user to call API operations or perform routine O&M. To create a RAM user, log on to the RAM console. 
$accessKeyId = "yourAccessKeyId";
$accessKeySecret = "yourAccessKeySecret";
// In this example, the endpoint of the China (Hangzhou) region is used. Specify your actual endpoint. 
$endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
// Specify the name of the bucket. Example: examplebucket. 
$bucket= "examplebucket";
// Specify the name of the object to which the symbolic link points. Example: exampleobject.txt. 
$object = "exampleobject.txt";
// Specify the name of the symbolic link. Example: examplesymlink.txt. 
$symlink = "examplesymlink.txt";

$options[OssClient::OSS_HEADERS] = array(
    // Specify whether to overwrite the object that has the same name when the symbolic link is created. In this example, x-oss-forbid-overwrite is set to true. This indicates that the object that has the same name cannot be overwritten. 
    'x-oss-forbid-overwrite'=>"true",
    // Specify the access control list (ACL) of the object. In this example, the ACL is set to private. Only the owner of the object and authorized users have read and write permissions on the object. 
    'x-oss-object-acl' =>"private",
    // Specify the storage class of the object. In this example, the storage class is set to Standard. 
    'x-oss-storage-class' =>"Standard"
);
try {
    $ossClient = new OssClient($accessKeyId, $accessKeySecret, $endpoint);
    $ossClient->putSymlink($bucket, $symlink, $object,$options);
} catch (OssException $e) {
    printf($e->getMessage() . "\n");
    return;
}

const OSS = require('ali-oss')

const client = new OSS({
  // Specify the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the region to oss-cn-hangzhou. 
  region: 'yourRegion',
  // The AccessKey pair of an Alibaba Cloud account has permissions on all API operations. Using these credentials to perform operations in OSS is a high-risk operation. We recommend that you use a RAM user to call API operations or perform routine O&M. To create a RAM user, log on to the RAM console. 
  accessKeyId: 'yourAccessKeyId',
  accessKeySecret: 'yourAccessKeySecret',
  // Specify the name of the bucket. 
  bucket: 'examplebucket',
});

const headers = {
   // Specify the storage class of the object. 
   'x-oss-storage-class':'Standard', 
   // Specify the ACL of the object. 
   'x-oss-object-acl':'private',
   // Specify whether to overwrite the object that has the same name when you create a symbolic link. In this example, this parameter is set to true, which indicates that the object that has the same name cannot be overwritten. 
   'x-oss-forbid-overwrite': 'true '
};

async function put () {
  try {
    // Specify symlinkobject.txt as the name of the symbolic link and exampleobject.txt as the name of the object to which you want the symbolic link to point.  
    const result = await client.putSymlink('symlinkobject.txt', 'exampleobject.txt'
    // ,{ headers }
    );
    console.log(result);
  } catch (e) {
    console.log(e);
  }
}

put();

# -*- coding: utf-8 -*-
import oss2
from oss2.credentials import EnvironmentVariableCredentialsProvider
# Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. 
auth = oss2.ProviderAuth(EnvironmentVariableCredentialsProvider())
# In this example, the endpoint of the China (Hangzhou) region is used. Specify your actual endpoint. For more information about the endpoints of other regions, see Regions and endpoints. 
# Specify the name of the bucket. Example: examplebucket. For more information about the naming conventions for buckets, see Bucket naming conventions. 
bucket = oss2.Bucket(auth, 'https://oss-cn-hangzhou.aliyuncs.com', 'examplebucket')
# Specify the name of the object to which you want the symbolic link to point. Example: exampleobject.txt. // For more information about the naming conventions for objects, see Object naming conventions. 
object_name = 'exampleobject.txt'
# Specify the name of the symbolic link. Example: examplesymlick.txt. 
symlink = 'examplesymlick.txt';

# headers = dict()
# Specify whether to overwrite the object that has the same name as the symbolic link. In this example, x-oss-forbid-overwrite is set to true. This indicates that the object that has the same name cannot be overwritten. 
# headers['x-oss-forbid-overwrite'] = 'true'
# Specify the access control list (ACL) of the object. In this example, this parameter is set to OBJECT_ACL_PRIVATE, which indicates that the ACL of the object is private. Only the owner of the object and authorized users have read and write permissions on the object. 
# headers[OSS_OBJECT_ACL] = oss2.OBJECT_ACL_PRIVATE
# Specify the storage class of the object. In this example, the storage class is set to Standard. 
# headers['x-oss-storage-class'] = oss2.BUCKET_STORAGE_CLASS_STANDARD
# bucket.put_symlink(object_name, symlink, headers=headers)
# Create the symbolic link. 
bucket.put_symlink(object_name, symlink)           

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <title>Document</title>
</head>

<body>
  <button id='upload'>Upload</button>
  <button id='symlink'>Create A Symbolic Link</button>  
  <!-- Import the SDK file -->
  <script type="text/javascript" src="https://gosspublic.alicdn.com/aliyun-oss-sdk-6.16.0.min.js"></script>
  <script type="text/javascript">
    const client = new OSS({
       // Specify the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the region to oss-cn-hangzhou. 
       region: 'yourRegion',
       // Specify the temporary AccessKey pair obtained from STS. An AccessKey pair consists of an AccessKey ID and an AccessKey secret. 
       accessKeyId: 'yourAccessKeyId',
       accessKeySecret: 'yourAccessKeySecret',
       // Specify the security token that you obtained from STS. 
       stsToken: 'yourSecurityToken',
       // Specify the name of the bucket. Example: examplebucket. 
       bucket: "examplebucket",
     });

    const upload = document.getElementById('upload')
    const symlink = document.getElementById('symlink')
    const getSymlink = document.getElementById("getSymlink")

    // Specify the content of the object to upload. 
    const file = new Blob(['examplecontent'])
    // Specify the name of the object to upload to the bucket. 
    const fileName = 'exampleobject.txt'

    // Upload the local file. 
    upload.addEventListener('click', () => {
      client.put(fileName, file).then(r => console.log(r))
    })
    
    // Create a symbolic link named symlink.txt. 
    sylink.addEventListener('click', () => {
      client.putSymlink('symlink.txt', fileName).then(r => console.log(r))
    })

  </script>
</body>

</html>

using Aliyun.OSS;
// Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. 
var endpoint = "yourEndpoint";
// The AccessKey pair of an Alibaba Cloud account has permissions on all API operations. Using these credentials to perform operations in OSS is a high-risk operation. We recommend that you use a RAM user to call API operations or perform routine O&M. To create a RAM user, log on to the RAM console. 
var accessKeyId = "yourAccessKeyId";
var accessKeySecret = "yourAccessKeySecret";
// Specify the name of the bucket. Example: examplebucket. 
var bucketName = "examplebucket";
var targetObjectName = "yourTargetObjectName";
var symlinkObjectName = "yourSymlinkObjectName";
var objectContent = "More than just cloud.";
// Create an OSSClient instance. 
var client = new OssClient(endpoint, accessKeyId, accessKeySecret);
try
{
    // Upload the object to which the symbolic link points. 
    byte[] binaryData = Encoding.ASCII.GetBytes(objectContent);
    MemoryStream requestContent = new MemoryStream(binaryData);
    client.PutObject(bucketName, targetObjectName, requestContent);
    // Create the symbolic link. 
    client.CreateSymlink(bucketName, symlinkObjectName, targetObjectName);
    // Obtain the name of the object to which the symbolic link points. 
    var ossSymlink = client.GetSymlink(bucketName, symlinkObjectName);
    Console.WriteLine("Target object is {0}", ossSymlink.Target);
}
catch (Exception ex)
{
    Console.WriteLine("Failed with error info: {0}", ex.Message);
}

// Construct a request. 
PutSymlinkRequest putSymlink = new PutSymlinkRequest();
// Specify the name of the bucket. 
putSymlink.setBucketName("yourBucketName");
// Specify the name of the symbolic link. 
putSymlink.setObjectKey("yourSymLink");
// Specify the name of the object to which the symbolic link points. 
putSymlink.setTargetObjectName("yourTargetObjectName");

ObjectMetadata metadata = new ObjectMetadata();
// Specify whether to overwrite the object with the same name. In this example, this parameter is set to true, which specifies that the object with the same name cannot be overwritten. 
//metadata.setHeader("x-oss-forbid-overwrite", "false");
// Specify the access control list (ACL) of the object. In this example, this parameter is set to private. 
//metadata.setHeader("x-oss-object-acl", "private");
// Specify the storage class of the object. In this example, this parameter is set to Standard. 
//metadata.setHeader("x-oss-storage-class", "Standard");
putSymlink.setMetadata(metadata);

OSSAsyncTask task = oss.asyncPutSymlink(putSymlink, new OSSCompletedCallback<PutSymlinkRequest, PutSymlinkResult>() {
    @Override
    public void onSuccess(PutSymlinkRequest request, PutSymlinkResult result) {
        Log.d("PutSymlink", "PutSymlink success");
    }

    @Override
    public void onFailure(PutSymlinkRequest request, ClientException clientException,
                          ServiceException serviceException) {
        // Handle request exceptions. 
        if (clientException != null) {
            // Handle client-side exceptions such as network errors. 
            clientException.printStackTrace();
        }
        if (serviceException != null) {
            // Handle server-side exceptions. 
            Log.e("ErrorCode", serviceException.getErrorCode());
            Log.e("RequestId", serviceException.getRequestId());
            Log.e("HostId", serviceException.getHostId());
            Log.e("RawMessage", serviceException.getRawMessage());
        }
    }
});
task.waitUntilFinished();

package main

import (
    "fmt"
    "github.com/aliyun/aliyun-oss-go-sdk/oss"
    "os"
    "strings"
)


func main() {
    // Create an OSSClient instance. 
    // Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. Specify your actual endpoint. 
    // The AccessKey pair of an Alibaba Cloud account has permissions on all API operations. Using these credentials to perform operations in OSS is a high-risk operation. We recommend that you use a RAM user to call API operations or perform routine O&M. To create a RAM user, log on to the RAM console. 
    client, err := oss.New("yourEndpoint", "yourAccessKeyId", "yourAccessKeySecret")
    if err != nil {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }

    // Specify the name of the bucket. Example: examplebucket. 
    bucketName := "examplebucket"
    // Specify the name of the symbolic link. Example: examplesymlink. 
    symObjectKey := "examplesymlink.txt"
    // Specify the name of the object to which you want the symbolic link to point. Example: exampleobject.txt. 
    objectName := "exampleobject.txt"

    bucket, err := client.Bucket(bucketName)
    if err != nil {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }

    // Create the symbolic link. 
    option := [] oss.Option{
        // Specify whether to overwrite the object that has the same name when you create a symbolic link. 
        oss.ForbidOverWrite(true),
        // Specify the ACL of the object. In this example, the ACL is set to private. 
        oss.ObjectACL(oss.ACLPrivate),
        // Specify the storage class of the object. In this example, the storage class is set to Standard. 
        oss.StorageClass(oss.StorageStandard),

    }
    err = bucket.PutSymlink(symObjectKey,objectName ,option...)

    if err != nil {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }

}

OSSPutSymlinkRequest *request = [OSSPutSymlinkRequest new];
// Specify the name of the bucket. Example: examplebucket. 
request.bucketName = @"examplebucket";
// Specify the name of the symbolic link. 
request.objectKey = @"examplesymlink";
// Specify the full path of the object. The full path cannot contain the bucket name. 
request.targetObjectName = @"exampleobject.txt";

OSSTask *putSymlinkTask = [client putSymlink:request];
[putSymlinkTask continueWithBlock:^id _Nullable(OSSTask * _Nonnull task) {
    if (!task.error) {
        NSLog(@"put symlink success");
    } else {
        NSLog(@"put symlink failed, error: %@", task.error);
    }
    return nil;
}];

#include <alibabacloud/oss/OssClient.h>
using namespace AlibabaCloud::OSS;

int main(void)
{
    /* The AccessKey pair of an Alibaba Cloud account has permissions on all API operations. Using these credentials to perform operations in OSS is a high-risk operation. We recommend that you use a RAM user to call API operations or perform routine O&M. To create a RAM user, log on to the RAM console. */
    std::string AccessKeyId = "yourAccessKeyId";
    std::string AccessKeySecret = "yourAccessKeySecret";
    /* Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. */
    std::string Endpoint = "yourEndpoint";
    /* Specify the name of the bucket. Example: examplebucket. */
    std::string BucketName = "examplebucket";
    /* Specify the full path of the object. Example: exampledir/exampleobject.txt. Do not include the bucket name in the full path. */
    std::string ObjectName = "exampledir/exampleobject.txt";
    /* Specify the full path of the symbolic link. Example: shortcut/myobject.txt. */
    std::string LinkName = "shortcut/myobject.txt";

    /* Initialize resources, such as network resources. */
    InitializeSdk();

    ClientConfiguration conf;
    OssClient client(Endpoint, AccessKeyId, AccessKeySecret, conf);



    /* Configure the HTTP headers. */
    auto meta = ObjectMetaData();
    meta.setContentType("text/plain");

    /* Configure user metadata. */
    meta.UserMetaData()["meta"] = "meta-value";

    /* Create the symbolic link. */
    CreateSymlinkRequest request(BucketName, ObjectName, meta);
    request.SetSymlinkTarget(LinkObjectName);
    auto outcome = client.CreateSymlink(request);

    if (!outcome.isSuccess()) {
        /* Handle exceptions. */
        std::cout << "CreateSymlink fail" <<
        ",code:" << outcome.error().Code() <<
        ",message:" << outcome.error().Message() <<
        ",requestId:" << outcome.error().RequestId() << std::endl;
        return -1;
    }

    /* Release resources, such as network resources. */
    ShutdownSdk();
    return 0;
}

#include "oss_api.h"
#include "aos_http_io.h"
/* Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. */
const char *endpoint = "yourEndpoint";
/* The AccessKey pair of an Alibaba Cloud account has permissions on all API operations. Using these credentials to perform operations in OSS is a high-risk operation. We recommend that you use a RAM user to call API operations or perform routine O&M. To create a RAM user, log on to the RAM console. */
const char *access_key_id = "yourAccessKeyId";
const char *access_key_secret = "yourAccessKeySecret";
/* Specify the name of the bucket. Example: examplebucket. */
const char *bucket_name = "examplebucket";
/* Specify the full path of the object. Do not include the bucket name in the full path. Example: exampledir/exampleobject.txt. */
const char *object_name = "exampledir/exampleobject.txt";
/* Specify the full path of the symbolic link that you want to create. */
const char *link_object_name = "yourLinkObjectName";
void init_options(oss_request_options_t *options)
{
    options->config = oss_config_create(options->pool);
    /* Use a char* string to initialize data of the aos_string_t type. */
    aos_str_set(&options->config->endpoint, endpoint);
    aos_str_set(&options->config->access_key_id, access_key_id);
    aos_str_set(&options->config->access_key_secret, access_key_secret);
    /* Specify whether to use CNAME. A value of 0 indicates that CNAME is not used. */
    options->config->is_cname = 0;
    /* Specify network parameters, such as the timeout period. */
    options->ctl = aos_http_controller_create(options->pool, 0);
}
int main(int argc, char *argv[])
{
    /* Call the aos_http_io_initialize method in main() to initialize global resources, such as network resources and memory resources. */
    if (aos_http_io_initialize(NULL, 0) != AOSE_OK) {
        exit(1);
    }
    /* Create a memory pool to manage memory. aos_pool_t is equivalent to apr_pool_t. The code that is used to create a memory pool is included in the APR library. */
    aos_pool_t *pool;
    /* Create a memory pool. The value of the second parameter is NULL. This value specifies that the pool does not inherit other memory pools. */
    aos_pool_create(&pool, NULL);
    /* Create and initialize options. This parameter includes global configuration information, such as endpoint, access_key_id, access_key_secret, is_cname, and curl. */
    oss_request_options_t *oss_client_options;
    /* Allocate the memory resources in the memory pool to the options. */
    oss_client_options = oss_request_options_create(pool);
    /* Initialize oss_client_options. */
    init_options(oss_client_options);
    /* Initialize the parameters. */
    aos_string_t bucket;
    aos_string_t object;
    aos_string_t sym_object;
    aos_table_t *resp_headers = NULL; 
    aos_status_t *resp_status = NULL; 
    aos_str_set(&bucket, bucket_name);
    aos_str_set(&object, object_name);
    aos_str_set(&sym_object, link_object_name);
    resp_status = oss_put_symlink(oss_client_options, &bucket, &sym_object, &object, &resp_headers);
    if (aos_status_is_ok(resp_status)) {
        printf("put symlink succeeded\n");
    } else {
        printf("put symlink failed\n");      
    }
    /* Release the memory pool. This operation releases memory resources that are allocated for the request. */
    aos_pool_destroy(pool);
    /* Release the allocated global resources. */
    aos_http_io_deinitialize();
    return 0;
}