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 */
16package com.squareup.okhttp;
17
18/** The source of an HTTP response. */
19public enum ResponseSource {
20
21  /** The response was returned from the local cache. */
22  CACHE,
23
24  /**
25   * The response is available in the cache but must be validated with the
26   * network. The cache result will be used if it is still valid; otherwise
27   * the network's response will be used.
28   */
29  CONDITIONAL_CACHE,
30
31  /** The response was returned from the network. */
32  NETWORK,
33
34  /**
35   * The request demanded a cached response that the cache couldn't satisfy.
36   * This yields a 504 (Gateway Timeout) response as specified by
37   * http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9.4.
38   */
39  NONE;
40
41  public boolean requiresConnection() {
42    return this == CONDITIONAL_CACHE || this == NETWORK;
43  }
44
45  public boolean usesCache() {
46    return this == CACHE || this == CONDITIONAL_CACHE;
47  }
48}
49