AWS S3请求者付费不与Transfermanager合作

Question

我正在尝试在我的Java程序中使用TransferManager类来从请求者支付存储桶中下载文件。我从Amazon AWS获得了"状态代码：403"例外。我编写了一个简单的程序来测试此功能，并比较它下载文件的单连接方式。这是我的代码：

import java.io.*;
import com.amazonaws.auth.*;
import com.amazonaws.services.s3.*;
import com.amazonaws.services.s3.model.*;
import com.amazonaws.services.s3.transfer.*;
import com.amazonaws.util.IOUtils;
public class RequesterPaysTest {
    final static AWSCredentials awsCredentials = new BasicAWSCredentials(MY IAMAccessKey,MY IAMSecretKey);
    final static String bucketName = "7268982505fe.mixnode.com";
    final static String fileName = "5379-7268982505fe-0-1496081968663.warc.gz";
    final static AWSCredentialsProvider awsCredentialsProvider =  new AWSStaticCredentialsProvider(awsCredentials);
    final static AmazonS3 s3client = AmazonS3ClientBuilder.standard().withCredentials(awsCredentialsProvider).withRegion(MY bucketRegion).build();
    final static GetObjectRequest getRequest = new GetObjectRequest(bucketName, fileName, true);
    static void testSimpleRequesterPays() {
        try {
        S3Object object = s3client.getObject(getRequest);
        InputStream objectData = object.getObjectContent();
        FileOutputStream out = new FileOutputStream (new File(fileName));
        IOUtils.copy(objectData, out);
        out.close();
        System.out.println(" Simple RequesterPays successful");
        } catch (Exception e) {
        System.out.println(" Simple RequesterPays unsuccessful: " + e.getMessage());
        }
    }
    static void testTransferManagerRequesterPays() {
        try {
            TransferManager tx = TransferManagerBuilder.standard().withS3Client(s3client).build();
            Download download = tx.download(getRequest, new File(fileName));
            while (download.isDone() == false)
                Thread.sleep(10);
            System.out.println(" TransferManager RequesterPays successful");
        } catch (Exception e) {
        System.out.println(" TransferManager RequesterPays unsuccessful: " + e.getMessage());
        }
    }
public static void main(String[] args) throws IOException {
    testSimpleRequesterPays();
    testTransferManagerRequesterPays();
}
}

这是输出：

Simple RequesterPays successful
 TransferManager RequesterPays unsuccessful: Forbidden (Service: Amazon S3; Status Code: 403; Error Code: 403 Forbidden; Request ID: 77D5EBF5EE195A7A)

您可以看到，可以使用简单方法下载相同的文件，但不能使用TransferManager下载。我试图创建自己的存储桶，并在权限方面玩耍，但它行不通。我想知道我是否错过了代码中的任何东西？或AWS S3是否不支持在请求者上使用TransferManager？

Answer 1

使用http head 方法而不是 get 用于下载对象(file(s((。您可以通过调试TransferManager SDK代码来找到它。如果您没有AWS API网关中的 HEAD 方法配置，则必须创建 head 方法配置才能与TransferManager SDK代码匹配。顺便说一句，如果找不到资源应该给出404，但您将获得403。原因是在这里https://forums.aws.amazon.com/thread.jspa?threadid=216684