Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License 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 org.jclouds.s3.handlers; import static org.jclouds.http.HttpUtils.closeClientButKeepContentStream; import static org.jclouds.http.Uris.uriBuilder; import java.net.URI; import javax.inject.Inject; import javax.inject.Singleton; import org.jclouds.aws.domain.AWSError; import org.jclouds.aws.util.AWSUtils; import org.jclouds.http.HttpCommand; import org.jclouds.http.HttpResponse; import org.jclouds.http.handlers.BackoffLimitedRetryHandler; import org.jclouds.http.handlers.RedirectionRetryHandler; import com.google.common.net.HttpHeaders; /** * Handles Retryable responses with error codes in the 3xx range */ @Singleton public class S3RedirectionRetryHandler extends RedirectionRetryHandler { private final AWSUtils utils; @Inject public S3RedirectionRetryHandler(BackoffLimitedRetryHandler backoffHandler, AWSUtils utils) { super(backoffHandler); this.utils = utils; } @Override public boolean shouldRetryRequest(HttpCommand command, HttpResponse response) { if (response.getFirstHeaderOrNull(HttpHeaders.LOCATION) == null && (response.getStatusCode() == 301 || response.getStatusCode() == 307)) { command.incrementRedirectCount(); closeClientButKeepContentStream(response); AWSError error = utils.parseAWSErrorFromContent(command.getCurrentRequest(), response); String host = error.getDetails().get("Endpoint"); if (host != null) { if (host.equals(command.getCurrentRequest().getEndpoint().getHost())) { // must be an amazon error related to // http://developer.amazonwebservices.com/connect/thread.jspa?messageID=72287𑩟 return backoffHandler.shouldRetryRequest(command, response); } else { URI newHost = uriBuilder(command.getCurrentRequest().getEndpoint()).host(host).build(); command.setCurrentRequest(command.getCurrentRequest().toBuilder().endpoint(newHost).build()); } return true; } else { return false; } } else { return super.shouldRetryRequest(command, response); } } }