content: /*
   * Copyright (C) 2011 The Android Open Source Project
   *
   * 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.cjj.volley.toolbox;
  
  import com.cjj.volley.AuthFailureError;
  import com.cjj.volley.Request;
  
  import org.apache.http.HttpResponse;
  
  import java.io.IOException;
  import java.util.Map;
  
  /**
   * An HTTP stack abstraction.
   */
  public interface HttpStack {
      /**
       * Performs an HTTP request with the given parameters.
       *
       * <p>A GET request is sent if request.getPostBody() == null. A POST request is sent otherwise,
       * and the Content-Type header is set to request.getPostBodyContentType().</p>
       *
       * @param request the request to perform
       * @param additionalHeaders additional headers to be sent together with
       *         {@link Request#getHeaders()}
       * @return the HTTP response
       */
      public HttpResponse performRequest(Request<?> request, Map<String, String> additionalHeaders)
          throws IOException, AuthFailureError;
  
  }
  