forked from OpenFeign/feign
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathResponse.java
More file actions
218 lines (183 loc) · 6.18 KB
/
Response.java
File metadata and controls
218 lines (183 loc) · 6.18 KB
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
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
/*
* Copyright 2013 Netflix, 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 feign;
import java.io.ByteArrayInputStream;
import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.nio.charset.Charset;
import java.util.Collection;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.Map;
import static feign.Util.UTF_8;
import static feign.Util.decodeOrDefault;
import static feign.Util.checkNotNull;
import static feign.Util.checkState;
import static feign.Util.valuesOrEmpty;
/**
* An immutable response to an http invocation which only returns string
* content.
*/
public final class Response {
private final int status;
private final String reason;
private final Map<String, Collection<String>> headers;
private final Body body;
public static Response create(int status, String reason, Map<String, Collection<String>> headers,
InputStream inputStream, Integer length) {
return new Response(status, reason, headers, InputStreamBody.orNull(inputStream, length));
}
public static Response create(int status, String reason, Map<String, Collection<String>> headers,
byte[] data) {
return new Response(status, reason, headers, ByteArrayBody.orNull(data));
}
public static Response create(int status, String reason, Map<String, Collection<String>> headers,
String text, Charset charset) {
return new Response(status, reason, headers, ByteArrayBody.orNull(text, charset));
}
private Response(int status, String reason, Map<String, Collection<String>> headers, Body body) {
checkState(status >= 200, "Invalid status code: %s", status);
this.status = status;
this.reason = checkNotNull(reason, "reason");
LinkedHashMap<String, Collection<String>> copyOf = new LinkedHashMap<String, Collection<String>>();
copyOf.putAll(checkNotNull(headers, "headers"));
this.headers = Collections.unmodifiableMap(copyOf);
this.body = body; //nullable
}
/**
* status code. ex {@code 200}
*
* See <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html" >rfc2616</a>
*/
public int status() {
return status;
}
public String reason() {
return reason;
}
public Map<String, Collection<String>> headers() {
return headers;
}
/**
* if present, the response had a body
*/
public Body body() {
return body;
}
public interface Body extends Closeable {
/**
* length in bytes, if known. Null if not.
* <br>
* <br><br><b>Note</b><br> This is an integer as most implementations cannot do
* bodies greater than 2GB. Moreover, the scope of this interface doesn't include
* large bodies.
*/
Integer length();
/**
* True if {@link #asInputStream()} and {@link #asReader()} can be called more than once.
*/
boolean isRepeatable();
/**
* It is the responsibility of the caller to close the stream.
*/
InputStream asInputStream() throws IOException;
/**
* It is the responsibility of the caller to close the stream.
*/
Reader asReader() throws IOException;
}
private static final class InputStreamBody implements Response.Body {
private static Body orNull(InputStream inputStream, Integer length) {
if (inputStream == null) {
return null;
}
return new InputStreamBody(inputStream, length);
}
private final InputStream inputStream;
private final Integer length;
private InputStreamBody(InputStream inputStream, Integer length) {
this.inputStream = inputStream;
this.length = length;
}
@Override public Integer length() {
return length;
}
@Override public boolean isRepeatable() {
return false;
}
@Override public InputStream asInputStream() throws IOException {
return inputStream;
}
@Override public Reader asReader() throws IOException {
return new InputStreamReader(inputStream, UTF_8);
}
@Override public void close() throws IOException {
inputStream.close();
}
}
private static final class ByteArrayBody implements Response.Body {
private static Body orNull(byte[] data) {
if (data == null) {
return null;
}
return new ByteArrayBody(data);
}
private static Body orNull(String text, Charset charset) {
if (text == null) {
return null;
}
checkNotNull(charset, "charset");
return new ByteArrayBody(text.getBytes(charset));
}
private final byte[] data;
public ByteArrayBody(byte[] data) {
this.data = data;
}
@Override public Integer length() {
return data.length;
}
@Override public boolean isRepeatable() {
return true;
}
@Override public InputStream asInputStream() throws IOException {
return new ByteArrayInputStream(data);
}
@Override public Reader asReader() throws IOException {
return new InputStreamReader(asInputStream(), UTF_8);
}
@Override public void close() throws IOException {
}
@Override public String toString() {
return decodeOrDefault(data, UTF_8, "Binary data");
}
}
@Override public String toString() {
StringBuilder builder = new StringBuilder();
builder.append("HTTP/1.1 ").append(status).append(' ').append(reason).append('\n');
for (String field : headers.keySet()) {
for (String value : valuesOrEmpty(headers, field)) {
builder.append(field).append(": ").append(value).append('\n');
}
}
if (body != null) {
builder.append('\n').append(body);
}
return builder.toString();
}
}