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Google API Client Library for Java. Supports Java 5 (or higher) desktop (SE) and web (EE), Android, and Google App Engine.

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/*
 * Copyright (c) 2010 Google Inc.
 * 
 * Licensed 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 com.google.api.client.http;

import java.io.IOException;

/**
 * Exception thrown when an error status code is detected in an HTTP response.
 * 
 * @since 1.0
 * @author Yaniv Inbar
 */
public final class HttpResponseException extends IOException {

  static final long serialVersionUID = 1;

  /** HTTP response. */
  public final HttpResponse response;

  /**
   * @param response HTTP response
   */
  public HttpResponseException(HttpResponse response) {
    super(computeMessage(response));
    this.response = response;
  }

  /** Returns an exception message to use for the given HTTP response. */
  public static String computeMessage(HttpResponse response) {
    String statusMessage = response.statusMessage;
    int statusCode = response.statusCode;
    if (statusMessage == null) {
      return String.valueOf(statusCode);
    }
    StringBuilder buf = new StringBuilder(4 + statusMessage.length());
    return buf.append(statusCode).append(' ').append(statusMessage).toString();
  }
}