Java 读取的数据长度与预期长度不同：dataLength=964481363；预期长度=964481376；

我试图从S3中读取一个加密对象，然后用不同的加密密钥将其上传到S3中的一个新bucket中。当我尝试读取对象时，使用getObject（）并尝试使用PutObject请求放置对象

当我打印源的内容长度时，它是964481376。那么，数据长度从何而来？是964481363

我的源文件的元数据如下所示：

内容类型

二进制/八位字节流

x-amz-meta-x-amz-unencrypt-content-length

964481363

x-amz-meta-x-amz-wrap-alg

kms

我无法共享KMS密钥

public boolean copyS3Object(AmazonS3Encryption sourceS3Client, AmazonS3URI sourceS3Uri,
            AmazonS3Encryption destS3Client, AmazonS3URI destS3Uri) throws AmazonServiceException, IOException {
        //String eTag;
        S3Object sourceS3Object = null;

        try {
            //Get the Source object stream
            sourceS3Object = sourceS3Client.getObject(sourceS3Uri.getBucket(), sourceS3Uri.getKey());
            ObjectMetadata objectMetadata = sourceS3Object.getObjectMetadata();
            System.out.println("content length " + objectMetadata.getContentLength());
            PutObjectRequest putRequest = new PutObjectRequest(destS3Uri.getBucket(), destS3Uri.getKey(),
                    sourceS3Object.getObjectContent(), sourceS3Object.getObjectMetadata());

            destS3Client.putObject(putRequest);
//
//            if (eTag.isEmpty()) {
//                System.out.println("Copy failed, New object in " + destS3Uri.toString() + " is empty");
//                return false;
//            }

        } catch (AmazonServiceException e) {
            throw e;
        } finally {
            if (sourceS3Object != null) {
                sourceS3Object.close();
            }
        }
        //System.out.println("Copied successfully to " + destS3Uri.toString() + " Etag:" + eTag);
        return true;
    }

但我得到了以下错误：

{ “errorMessage”：“读取的数据长度与预期长度不同：dataLength=964481363；expectedLength=964481376；IncludesChipped=false；in.getClass（）=class com.amazonaws.internal.ReleasableInputStream；markedSupported=false；marked=0；ResetSincellastMarked=false；markCount=0；resetCount=0”， “errorType”：“com.amazonaws.SdkClientException”， “stackTrace”：[ “com.amazonaws.util.LengthCheckInputStream.checkLength（LengthCheckInputStream.java:151）”， “com.amazonaws.util.LengthCheckInputStream.read（LengthCheckInputStream.java:109）”， “java.io.FilterInputStream.read（FilterInputStream.java:107）”， “com.amazonaws.services.s3.internal.crypto.CipherLiteInputStream.nextChunk（CipherLiteInputStream.java:225）”， “com.amazonaws.services.s3.internal.crypto.CipherLiteInputStream.read（CipherLiteInputStream.java:118）”， “com.amazonaws.services.s3.internal.crypto.RenewableCipherLiteInputStream.read（RenewableCipherLiteInputStream.java:112）”， “com.amazonaws.internal.SdkFilterInputStream.read（SdkFilterInputStream.java:90）”， “com.amazonaws.internal.SdkFilterInputStream.read（SdkFilterInputStream.java:90）”， “com.amazonaws.util.LengthCheckInputStream.read（LengthCheckInputStream.java:107）”， “com.amazonaws.internal.SdkFilterInputStream.read（SdkFilterInputStream.java:90）”， “com.amazonaws.services.s3.internal.MD5DigestCalculatingInputStream.read（MD5DigestCalculatingInputStream.java:128）”， “java.io.BufferedInputStream.fill（BufferedInputStream.java:246）”， “java.io.BufferedInputStream.read1（BufferedInputStream.java:286）”， “java.io.BufferedInputStream.read（BufferedInputStream.java:345）”， “com.amazonaws.internal.SdkBufferedInputStream.read（SdkBufferedInputStream.java:76）”， “com.amazonaws.internal.SdkFilterInputStream.read（SdkFilterInputStream.java:90）”， “com.amazonaws.event.ProgressInputStream.read（ProgressInputStream.java:180）”， “com.amazonaws.internal.SdkFilterInputStream.read（SdkFilterInputStream.java:90）”， “org.apache.http.entity.InputStreamEntity.writeTo（InputStreamEntity.java:140）”， “com.amazonaws.http.RepeatableInputStreamRequestEntity.writeTo（RepeatableInputStreamRequestEntity.java:160）”， “org.apache.http.impl.DefaultBHttpClientConnection.sendRequestEntity（DefaultBHttpClientConnection.java:156）”， “org.apache.http.impl.conn.CPoolProxy.sendRequestEntity（CPoolProxy.java:162）”， “org.apache.http.protocol.HttpRequestExecutor.doSendRequest（HttpRequestExecutor.java:238）”， “com.amazonaws.http.protocol.SdkHttpRequestExecutor.doSendRequest（SdkHttpRequestExecutor.java:63）”， “org.apache.http.protocol.HttpRequestExecutor.execute（HttpRequestExecutor.java:123）”， “org.apache.http.impl.execchain.MainClientExec.execute（MainClientExec.java:271）”， “org.apache.http.impl.execchain.ProtocolExec.execute（ProtocolExec.java:184）”， “org.apache.http.impl.client.InternalHttpClient.doExecute（InternalHttpClient.java:184）”， “org.apache.http.impl.client.CloseableHttpClient.execute（CloseableHttpClient.java:82）”， “org.apache.http.impl.client.CloseableHttpClient.execute（CloseableHttpClient.java:55）”， “com.amazonaws.http.apache.client.impl.SdkHttpClient.execute（SdkHttpClient.java:72）”， “com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeOneRequest（AmazonHttpClient.java:1297）”， “com.amazonaws.http.AmazonHttpClient$RequestExecutor.executehelp（AmazonHttpClient.java:1113）”， “com.amazonaws.http.AmazonHttpClient$RequestExecutor.doExecute（AmazonHttpClient.java:770）”， “com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeWithTimer（AmazonHttpClient.java:744）”， “com.amazonaws.http.AmazonHttpClient$RequestExecutor.execute（AmazonHttpClient.java:726）”， “com.amazonaws.http.AmazonHttpClient$RequestExecutor.access$500（AmazonHttpClient.java:686）”， “com.amazonaws.http.AmazonHttpClient$RequestExecutionBuilderImpl.execute（AmazonHttpClient.java:668）”， “com.amazonaws.http.AmazonHttpClient.execute（AmazonHttpClient.java:532）”， “com.amazonaws.http.AmazonHttpClient.execute（AmazonHttpClient.java:512）”， “com.amazonaws.services.s3.AmazonS3Client.invoke（AmazonS3Client.java:4914）”， “com.amazonaws.services.s3.AmazonS3Client.invoke（AmazonS3Client.java:4860）”， “com.amazonaws.services.s3.AmazonS3Client.access$300（AmazonS3Client.java:389）”， “com.amazonaws.services.s3.AmazonS3Client$PutObjectStrategy.invokeServiceCall（AmazonS3Client.java:5793）”， “com.amazonaws.services.s3.AmazonS3Client.uploadObject（AmazonS3Client.java:1786）”， “com.amazonaws.services.s3.AmazonS3Client.putObject（AmazonS3Client.java:1746）”， “com.amazonaws.services.s3.AmazonS3EncryptionClient.access$101（AmazonS3EncryptionClient.java:81）”， “com.amazonaws.services.s3.AmazonS3EncryptionClient$S3DirectImpl.putObject（AmazonS3EncryptionClient.java:690）”， “com.amazonaws.services.s3.internal.crypto.S3CryptoModuleBase.putObjectUsingMetadata（S3CryptoModuleBase.java:175）”， “com.amazonaws.services.s3.internal.crypto.S3CryptoModuleBase.putObjectSecurity（S3CryptoModuleBase.java:161）”， “com.amazonaws.services.s3.internal.crypto.CryptoModuleDispatcher.PutObjectSecurity（CryptoModuleDispatcher.java:108）”， “com.amazonaws.services.s3.AmazonS3EncryptionClient.putObject（Amazon

 try {
            //Get the Source object stream
            sourceS3Object = sourceS3Client.getObject(sourceS3Uri.getBucket(), sourceS3Uri.getKey());
            //For a decrypted object, the content length in metadata has the encrypted length
            //Set the content length to the unencrypted-data-length
            ObjectMetadata objectMetadata = sourceS3Object.getObjectMetadata();
            Map<String, String> modelMetaData = objectMetadata.getUserMetadata();
            Long unencryptedDataLength = Long.parseLong(modelMetaData.get(
                    "x-amz-unencrypted-content-length"));
            objectMetadata.setContentLength(unencryptedDataLength);
            PutObjectRequest putRequest = new PutObjectRequest(destS3Uri.getBucket(), destS3Uri.getKey(),
                    sourceS3Object.getObjectContent(), objectMetadata);

            eTag = destS3Client.putObject(putRequest).getETag();

            if (eTag.isEmpty()) {
                System.out.println("Copy failed, New object in " + destS3Uri.toString() + " is empty");
                return false;
            }