software.amazon.awssdk.services.s3.internal.handlers.SyncChecksumValidationInterceptor Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of s3 Show documentation
The AWS Java SDK for Amazon S3 module holds the client classes that are used for communicating with Amazon Simple Storage Service
There is a newer version: 2.29.39
Show newest version
/*
 * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file is distributed
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the License for the specific language governing
 * permissions and limitations under the License.
 */

package software.amazon.awssdk.services.s3.internal.handlers;

import static software.amazon.awssdk.core.ClientType.SYNC;
import static software.amazon.awssdk.services.s3.checksums.ChecksumConstant.CONTENT_LENGTH_HEADER;
import static software.amazon.awssdk.services.s3.checksums.ChecksumsEnabledValidator.CHECKSUM;
import static software.amazon.awssdk.services.s3.checksums.ChecksumsEnabledValidator.getObjectChecksumEnabledPerResponse;
import static software.amazon.awssdk.services.s3.checksums.ChecksumsEnabledValidator.responseChecksumIsValid;
import static software.amazon.awssdk.services.s3.checksums.ChecksumsEnabledValidator.shouldRecordChecksum;
import static software.amazon.awssdk.services.s3.checksums.ChecksumsEnabledValidator.validatePutObjectChecksum;
import static software.amazon.awssdk.utils.FunctionalUtils.invokeSafely;

import java.io.InputStream;
import java.util.Optional;
import software.amazon.awssdk.annotations.SdkInternalApi;
import software.amazon.awssdk.core.checksums.Md5Checksum;
import software.amazon.awssdk.core.checksums.SdkChecksum;
import software.amazon.awssdk.core.interceptor.Context;
import software.amazon.awssdk.core.interceptor.ExecutionAttribute;
import software.amazon.awssdk.core.interceptor.ExecutionAttributes;
import software.amazon.awssdk.core.interceptor.ExecutionInterceptor;
import software.amazon.awssdk.core.sync.RequestBody;
import software.amazon.awssdk.http.ContentStreamProvider;
import software.amazon.awssdk.services.s3.checksums.ChecksumCalculatingInputStream;
import software.amazon.awssdk.services.s3.checksums.ChecksumValidatingInputStream;
import software.amazon.awssdk.services.s3.model.PutObjectResponse;

@SdkInternalApi
public final class SyncChecksumValidationInterceptor implements ExecutionInterceptor {
    private static ExecutionAttribute SYNC_RECORDING_CHECKSUM = new ExecutionAttribute<>("syncRecordingChecksum");

    @Override
    public Optional modifyHttpContent(Context.ModifyHttpRequest context,
                                                   ExecutionAttributes executionAttributes) {
        if (shouldRecordChecksum(context.request(), SYNC, executionAttributes, context.httpRequest())
            && context.requestBody().isPresent()) {
            SdkChecksum checksum = new Md5Checksum();
            executionAttributes.putAttribute(CHECKSUM, checksum);
            executionAttributes.putAttribute(SYNC_RECORDING_CHECKSUM, true);

            RequestBody requestBody = context.requestBody().get();

            ChecksumCalculatingStreamProvider streamProvider =
                new ChecksumCalculatingStreamProvider(requestBody.contentStreamProvider(), checksum);

            return Optional.of(RequestBody.fromContentProvider(streamProvider,
                                                               requestBody.contentLength(),
                                                               requestBody.contentType()));
        }

        return context.requestBody();
    }

    @Override
    public Optional modifyHttpResponseContent(Context.ModifyHttpResponse context,
                                                           ExecutionAttributes executionAttributes) {
        if (getObjectChecksumEnabledPerResponse(context.request(), context.httpResponse())
            && context.responseBody().isPresent()) {

            SdkChecksum checksum = new Md5Checksum();

            long contentLength = context.httpResponse()
                                        .firstMatchingHeader(CONTENT_LENGTH_HEADER)
                                        .map(Long::parseLong)
                                        .orElse(0L);

            if (contentLength > 0) {
                return Optional.of(new ChecksumValidatingInputStream(context.responseBody().get(), checksum, contentLength));
            }
        }

        return context.responseBody();
    }

    @Override
    public void afterUnmarshalling(Context.AfterUnmarshalling context, ExecutionAttributes executionAttributes) {
        boolean recordingChecksum = Boolean.TRUE.equals(executionAttributes.getAttribute(SYNC_RECORDING_CHECKSUM));
        boolean responseChecksumIsValid = responseChecksumIsValid(context.httpResponse());

        if (recordingChecksum && responseChecksumIsValid) {
            validatePutObjectChecksum((PutObjectResponse) context.response(), executionAttributes);
        }
    }

    static final class ChecksumCalculatingStreamProvider implements ContentStreamProvider {
        private final SdkChecksum checksum;
        private InputStream currentStream;
        private final ContentStreamProvider underlyingInputStreamProvider;

        ChecksumCalculatingStreamProvider(ContentStreamProvider underlyingInputStreamProvider, SdkChecksum checksum) {
            this.underlyingInputStreamProvider = underlyingInputStreamProvider;
            this.checksum = checksum;
        }

        @Override
        public InputStream newStream() {
            closeCurrentStream();
            currentStream = invokeSafely(() -> new ChecksumCalculatingInputStream(underlyingInputStreamProvider.newStream(),
                                                                                  checksum));
            return currentStream;
        }

        private void closeCurrentStream() {
            checksum.reset();
            if (currentStream != null) {
                invokeSafely(currentStream::close);
                currentStream = null;
            }
        }
    }

}