1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
/*
* 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.android.volley.toolbox;
import androidx.annotation.GuardedBy;
import androidx.annotation.Nullable;
import com.android.volley.NetworkResponse;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.Response.ErrorListener;
import com.android.volley.Response.Listener;
import com.android.volley.VolleyLog;
import java.io.UnsupportedEncodingException;
/**
* A request for retrieving a T type response body at a given URL that also optionally sends along a
* JSON body in the request specified.
*
* @param <T> JSON type of response expected
*/
public abstract class JsonRequest<T> extends Request<T> {
/** Default charset for JSON request. */
protected static final String PROTOCOL_CHARSET = "utf-8";
/** Content type for request. */
private static final String PROTOCOL_CONTENT_TYPE =
String.format("application/json; charset=%s", PROTOCOL_CHARSET);
/** Lock to guard mListener as it is cleared on cancel() and read on delivery. */
private final Object mLock = new Object();
@Nullable
@GuardedBy("mLock")
private Listener<T> mListener;
@Nullable private final String mRequestBody;
/**
* Deprecated constructor for a JsonRequest which defaults to GET unless {@link #getPostBody()}
* or {@link #getPostParams()} is overridden (which defaults to POST).
*
* @deprecated Use {@link #JsonRequest(int, String, String, Listener, ErrorListener)}.
*/
@Deprecated
public JsonRequest(
String url, String requestBody, Listener<T> listener, ErrorListener errorListener) {
this(Method.DEPRECATED_GET_OR_POST, url, requestBody, listener, errorListener);
}
public JsonRequest(
int method,
String url,
@Nullable String requestBody,
Listener<T> listener,
@Nullable ErrorListener errorListener) {
super(method, url, errorListener);
mListener = listener;
mRequestBody = requestBody;
}
@Override
public void cancel() {
super.cancel();
synchronized (mLock) {
mListener = null;
}
}
@Override
protected void deliverResponse(T response) {
Response.Listener<T> listener;
synchronized (mLock) {
listener = mListener;
}
if (listener != null) {
listener.onResponse(response);
}
}
@Override
protected abstract Response<T> parseNetworkResponse(NetworkResponse response);
/** @deprecated Use {@link #getBodyContentType()}. */
@Deprecated
@Override
public String getPostBodyContentType() {
return getBodyContentType();
}
/** @deprecated Use {@link #getBody()}. */
@Deprecated
@Override
public byte[] getPostBody() {
return getBody();
}
@Override
public String getBodyContentType() {
return PROTOCOL_CONTENT_TYPE;
}
@Override
public byte[] getBody() {
try {
return mRequestBody == null ? null : mRequestBody.getBytes(PROTOCOL_CHARSET);
} catch (UnsupportedEncodingException uee) {
VolleyLog.wtf(
"Unsupported Encoding while trying to get the bytes of %s using %s",
mRequestBody, PROTOCOL_CHARSET);
return null;
}
}
}
|