1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.volley.toolbox;
18
19import com.android.volley.AuthFailureError;
20import com.android.volley.Request;
21
22import org.apache.http.HttpResponse;
23
24import java.io.IOException;
25import java.util.Map;
26
27/**
28 * An HTTP stack abstraction.
29 */
30public interface HttpStack {
31    /**
32     * Performs an HTTP request with the given parameters.
33     *
34     * <p>A GET request is sent if request.getPostBody() == null. A POST request is sent otherwise,
35     * and the Content-Type header is set to request.getPostBodyContentType().</p>
36     *
37     * @param request the request to perform
38     * @param additionalHeaders additional headers to be sent together with
39     *         {@link Request#getHeaders()}
40     * @return the HTTP response
41     */
42    public HttpResponse performRequest(Request<?> request, Map<String, String> additionalHeaders)
43        throws IOException, AuthFailureError;
44
45}
46