Pago por solicitante (OSS SDK for Java 1.0) - Object Storage Service

Cuando se habilita el pago por solicitante para un bucket en Object Storage Service (OSS), los cargos por solicitudes y tráfico se facturan al solicitante en lugar del propietario del bucket. El propietario solo paga las tarifas de almacenamiento. Habilite esta función en un bucket para compartir datos sin asumir los costos de solicitud y tráfico que genera el acceso a su bucket.

Notas de uso

En este tema se utiliza el endpoint público de la región China (Hangzhou). Para acceder a OSS desde otros servicios de Alibaba Cloud en la misma región, utilice un endpoint interno. Para obtener más información sobre las regiones y los endpoints compatibles, consulte Regions and endpoints.
Las credenciales de acceso se obtienen de variables de entorno. Para obtener más información, consulte 配置访问凭证.
Este tema muestra cómo crear una instancia de OSSClient con un endpoint de OSS. Para conocer configuraciones alternativas, como usar un dominio personalizado o autenticarse con credenciales de Security Token Service (STS), consulte Client configuration.
Para habilitar el pago por solicitante, necesita el permiso oss:PutBucketRequestPayment. Para consultar la configuración de pago por solicitante, necesita el permiso oss:GetBucketRequestPayment. Para obtener más información, consulte Grant a custom policy.

Habilitar el pago por solicitante para un bucket

A continuación se muestra un ejemplo de código para habilitar el pago por solicitante en un bucket:

import com.aliyun.oss.ClientBuilderConfiguration;
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.common.comm.SignVersion;
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. Replace it with 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 set. 
        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
        // Specify the name of the bucket. Example: examplebucket. 
        String bucketName = "examplebucket";
        // 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 cn-hangzhou.
        String region = "cn-hangzhou";
        
        // Create an OSSClient instance. 
        // Call the shutdown method to release associated resources when the OSS Client is no longer in use.
        ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
        clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);        
        OSS ossClient = OSSClientBuilder.create()
        .endpoint(endpoint)
        .credentialsProvider(credentialsProvider)
        .clientConfiguration(clientBuilderConfiguration)
        .region(region)               
        .build();
        try {
            // Enable pay-by-requester for the bucket. 
            Payer payer = Payer.Requester;
            ossClient.setBucketRequestPayment(bucketName, payer);
        } 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 (Throwable 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 {
            // Shut down the OSSClient instance. 
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }
}

Consultar la configuración de pago por solicitante de un bucket

El siguiente código muestra cómo consultar la configuración de pago por solicitante de un bucket:

import com.aliyun.oss.ClientBuilderConfiguration;
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.common.comm.SignVersion;
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 region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou.
        String region = "cn-hangzhou";
        
        // Create an OSS Client instance. 
        // Call the shutdown method to release associated resources when the OSS Client is no longer in use.
        ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
        clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);        
        OSS ossClient = OSSClientBuilder.create()
        .endpoint(endpoint)
        .credentialsProvider(credentialsProvider)
        .clientConfiguration(clientBuilderConfiguration)
        .region(region)               
        .build();
        try {
            // Query the pay-by-requester configurations of the bucket. 
            GetBucketRequestPaymentResult result = ossClient.getBucketRequestPayment(bucketName);
            System.out.println("Payer:" + result.getPayer());
        } 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 (Throwable 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 {
            // Shut down the OSSClient instance. 
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }
}

Especificar que terceros asuman los cargos al acceder a objetos

Si establece que terceros asuman los cargos por acceder a los objetos de un bucket, los solicitantes deben incluir el encabezado x-oss-request-payer:requester en las solicitudes HTTP para ejecutar operaciones sobre sus objetos. Si no se incluye este encabezado, se devuelve un error.

El siguiente ejemplo de código muestra cómo especificar que terceros asuman los cargos al acceder a objetos mediante las operaciones PutObject, GetObject y DeleteObject. Utilice este mismo método para indicar que terceros paguen las operaciones de lectura y escritura con otras llamadas a la API.

A continuación se muestra un ejemplo de código para especificar que terceros asuman los cargos al acceder a objetos:

import com.aliyun.oss.ClientBuilderConfiguration;
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.common.comm.SignVersion;
import com.aliyun.oss.model.*;
import java.io.ByteArrayInputStream;

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. For more information about the endpoints of other regions, see Regions and endpoints. 
        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 full path of the object. Example: exampledir/exampleobject.txt. Do not include the bucket name in the full path. 
        String objectName = "exampledir/exampleobject.txt";
        Payer payer = Payer.Requester;
        // 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 cn-hangzhou.
        String region = "cn-hangzhou";
        
        // Create an OSS Client instance. 
        // Call the shutdown method to release associated resources when the OSS Client is no longer in use.
        ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
        clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);        
        OSS ossClient = OSSClientBuilder.create()
        .endpoint(endpoint)
        .credentialsProvider(credentialsProvider)
        .clientConfiguration(clientBuilderConfiguration)
        .region(region)               
        .build();
        try {
            // Specify the payer when a third party calls the PutObject operation. 
            String content = "hello";
            PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName, objectName, new ByteArrayInputStream(content.getBytes()));
            putObjectRequest.setRequestPayer(payer);
            ossClient.putObject(putObjectRequest);

            // Specify the payer when a third party calls the GetObject operation. 
            GetObjectRequest getObjectRequest = new GetObjectRequest(bucketName, objectName);
            getObjectRequest.setRequestPayer(payer);
            OSSObject ossObject = ossClient.getObject(getObjectRequest);
            ossObject.close();

            // Specify the payer when a third party calls the DeleteObject operation. 
            GenericRequest genericRequest = new GenericRequest(bucketName, objectName);
            genericRequest.setRequestPayer(payer);
            ossClient.deleteObject(genericRequest);
        } 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 (Throwable 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 {
            // Shut down the OSSClient instance. 
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }
}

Referencias

Para consultar el código de ejemplo completo que configura el pago por solicitante, visite GitHub.
Para obtener más información sobre la operación de API que permite habilitar el pago por solicitante, consulte PutBucketRequestPayment.
Para obtener más información sobre la operación de API que permite consultar la configuración de pago por solicitante, consulte GetBucketRequestPayment.