google-cloud-storage/src/main/java/org/jclouds/googlecloudstorage/handlers/GoogleCloudStorageErrorHandler.java

/*
 * 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.googlecloudstorage.handlers;

import static org.jclouds.http.HttpUtils.closeClientButKeepContentStream;

import javax.inject.Singleton;

import org.jclouds.http.HttpCommand;
import org.jclouds.http.HttpErrorHandler;
import org.jclouds.http.HttpResponse;
import org.jclouds.http.HttpResponseException;
import org.jclouds.rest.AuthorizationException;
import org.jclouds.rest.ResourceNotFoundException;

/**
 * This will parse and set an appropriate exception on the command object.
 */
@Singleton
public class GoogleCloudStorageErrorHandler implements HttpErrorHandler {
   public void handleError(HttpCommand command, HttpResponse response) {
      // it is important to always read fully and close streams
      byte[] data = closeClientButKeepContentStream(response);
      String message = data != null ? new String(data) : null;

      Exception exception = message != null ? new HttpResponseException(command, response, message)
              : new HttpResponseException(command, response);
      message = message != null ? message : String.format("%s -> %s", command.getCurrentRequest().getRequestLine(),
              response.getStatusLine());

      String message411 = "MissingContentLength: You must provide the Content-Length HTTP header.\n";
      String message412 = "PreconditionFailed: At least one of the pre-conditions you specified did not hold.\n";

      switch (response.getStatusCode()) {
         case 308:
            return;
         case 400:
            if (message.indexOf("<Code>ExpiredToken</Code>") != -1) {
               exception = new AuthorizationException(message, exception);
            }
            break;
         case 401:
         case 403:
            exception = new AuthorizationException(message, exception);
            break;
         case 404:            
             exception = new ResourceNotFoundException(message, exception);           
             break;
         case 409:
            exception = new IllegalStateException(message, exception);
            break;
         case 411:
            exception = new IllegalStateException(message411 + message, exception);
            break;
         case 412:
            exception = new IllegalStateException(message412 + message, exception);
            break;
      }
      command.setException(exception);
   }
}