通过 AWS 访问 S3 的问题 Java SDK

Question

I'm trying to get and S3 object size via Java AWS SDK (v2), and send it back via HTTP response (this is all inside a HTTP Server using com.sun.net.httpserver.HttpServer ). 但它不起作用并向我显示以下调试消息。

这里出了什么问题？ 我错过了什么吗？

        AwsBasicCredentials awsCreds = AwsBasicCredentials.create(
                AdapterMain.ACCESS_KEY,
                AdapterMain.SECRET_KEY);

        s3Client = S3Client.builder().region(region)
                                    .endpointOverride(URI.create(AdapterMain.S3server))
                                   .credentialsProvider(StaticCredentialsProvider.create(awsCreds))
                                   .build();
                    //TODO
                    HeadObjectRequest getObjectRequest = HeadObjectRequest.builder()
                            .bucket(bucketName).key("FILES/"+getMD5(id)+"/FILES/"+id+"/"+id+".txt").build();

                    HeadObjectResponse objectHead = s3Client.headObject(getObjectRequest);
                    long size = objectHead.contentLength();
                    System.out.println("=================================="+size);
                    response=size+"";
                    he.sendResponseHeaders(200, response.length());

这是日志：

18:44:14.898 [HTTP-Dispatcher] DEBUG software.amazon.awssdk.core.interceptor.ExecutionInterceptorChain - Creating an interceptor chain that will apply interceptors in the following order: [software.amazon.awssdk.core.internal.interceptor.HttpChecksumRequiredInterceptor@62ec69e1, software.amazon.awssdk.awscore.interceptor.HelpfulUnknownHostExceptionInterceptor@1d17dde7, software.amazon.awssdk.services.s3.internal.handlers.EnableChunkedEncodingInterceptor@339b31af, software.amazon.awssdk.services.s3.internal.handlers.DisableDoubleUrlEncodingInterceptor@3d96c2f6, software.amazon.awssdk.services.s3.internal.handlers.EnableTrailingChecksumInterceptor@3cb417c4, software.amazon.awssdk.services.s3.internal.handlers.CreateMultipartUploadRequestInterceptor@1f6f0d50, software.amazon.awssdk.services.s3.internal.handlers.GetObjectInterceptor@7513515b, software.amazon.awssdk.services.s3.internal.handlers.AsyncChecksumValidationInterceptor@7e99ac7d, software.amazon.awssdk.services.s3.internal.handlers.EndpointAddressInterceptor@620f9e5d, software.amazon.awssdk.services.s3.internal.handlers.ExceptionTranslationInterceptor@56d0ac1, software.amazon.awssdk.services.s3.internal.handlers.GetBucketPolicyInterceptor@6a1b0abe, software.amazon.awssdk.services.s3.internal.handlers.PutObjectInterceptor@5952b9c4, software.amazon.awssdk.services.s3.internal.handlers.SyncChecksumValidationInterceptor@473129c5, software.amazon.awssdk.services.s3.internal.handlers.DecodeUrlEncodedResponseInterceptor@2ae718e0, software.amazon.awssdk.services.s3.internal.handlers.CreateBucketInterceptor@181bb9f8]
18:44:14.939 [HTTP-Dispatcher] DEBUG software.amazon.awssdk.core.interceptor.ExecutionInterceptorChain - Interceptor 'software.amazon.awssdk.services.s3.internal.handlers.EndpointAddressInterceptor@620f9e5d' modified the message with its modifyHttpRequest method.
18:44:14.967 [HTTP-Dispatcher] DEBUG software.amazon.awssdk.request - Sending Request: DefaultSdkHttpFullRequest(httpMethod=HEAD, protocol=https, host=file-store.s3-server.dcstore.company.net, port=443, encodedPath=/FILES/f13e/FILES/id_1234/id_1234.txt, headers=[amz-sdk-invocation-id, User-Agent], queryParameters=[])
18:44:14.978 [HTTP-Dispatcher] DEBUG software.amazon.awssdk.auth.signer.Aws4Signer - AWS4 String to sign: AWS4-HMAC-SHA256
20210305T014414Z
20210305/us-east-1/s3/aws4_request
9bfed5fd14903f65ac34647985e2c8a4bbe0fbf311982cfbeb2e44b2b58a2390
18:44:14.991 [HTTP-Dispatcher] WARN software.amazon.awssdk.http.apache.internal.utils.ApacheUtils - NoSuchMethodException was thrown when disabling normalizeUri. This indicates you are using an old version (< 4.5.8) of Apache http client. It is recommended to use http client version >= 4.5.9 to avoid the breaking change introduced in apache client 4.5.7 and the latency in exception handling. See https://github.com/aws/aws-sdk-java/issues/1919 for more information
18:44:15.098 [HTTP-Dispatcher] DEBUG software.amazon.awssdk.http.apache.internal.conn.SdkTlsSocketFactory - socket.getSupportedProtocols(): [TLSv1.3, TLSv1.2, TLSv1.1, TLSv1, SSLv3, SSLv2Hello], socket.getEnabledProtocols(): [TLSv1.3, TLSv1.2, TLSv1.1, TLSv1]
18:44:15.099 [HTTP-Dispatcher] DEBUG software.amazon.awssdk.http.apache.internal.conn.SdkTlsSocketFactory - TLS protocol enabled for SSL handshake: [TLSv1.2, TLSv1.1, TLSv1, TLSv1.3]
18:44:15.506 [HTTP-Dispatcher] DEBUG software.amazon.awssdk.http.apache.internal.net.SdkSslSocket - created: file-store.s3-server.dcstore.company.net/10.111.111.20:443

Answer 1

在这种特殊情况下， warning消息有点误导，从技术上讲应该是error的，因为这是httpclinet库中的一项重大更改，可能导致程序出现意外行为。 这种依赖本身是来自aws-java-sdk的传递依赖。 因此，要修复它，只需遵循警告消息中提供的建议，并在项目 pom 文件中明确定义所需的httpclinet版本：

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.9</version>
</dependency>