apis/s3/src/main/java/org/jclouds/s3/handlers/S3RedirectionRetryHandler.java

/**
 * Licensed to jclouds, Inc. (jclouds) under one or more
 * contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  jclouds 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 javax.inject.Inject;
import javax.inject.Provider;
import javax.inject.Singleton;
import javax.ws.rs.HttpMethod;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.UriBuilder;

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;

/**
 * Handles Retryable responses with error codes in the 3xx range
 * 
 * @author Adrian Cole
 */
@Singleton
public class S3RedirectionRetryHandler extends RedirectionRetryHandler {
   private final AWSUtils utils;

   @Inject
   public S3RedirectionRetryHandler(Provider<UriBuilder> uriBuilderProvider,
         BackoffLimitedRetryHandler backoffHandler, AWSUtils utils) {
      super(uriBuilderProvider, backoffHandler);
      this.utils = utils;
   }

   @Override
   public boolean shouldRetryRequest(HttpCommand command, HttpResponse response) {
      if (response.getFirstHeaderOrNull(HttpHeaders.LOCATION) == null
            && (response.getStatusCode() == 301 || response.getStatusCode() == 307)) {
         if (command.getCurrentRequest().getMethod().equals(HttpMethod.HEAD)) {
            command.incrementRedirectCount();
            command.setCurrentRequest(command.getCurrentRequest().toBuilder().method("GET").build());
            return true;
         } else {
            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=72287&#72287
                  return backoffHandler.shouldRetryRequest(command, response);
               } else {
                  UriBuilder builder = uriBuilderProvider.get().uri(command.getCurrentRequest().getEndpoint());
                  builder.host(host);
                  command.setCurrentRequest(command.getCurrentRequest().toBuilder().endpoint(builder.build()).build());
               }
               return true;
            } else {
               return false;
            }
         }
      } else {
         return super.shouldRetryRequest(command, response);
      }
   }
}