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
|
/*
* $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/entity/BasicHttpEntity.java $
* $Revision: 496070 $
* $Date: 2007-01-14 04:18:34 -0800 (Sun, 14 Jan 2007) $
*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.http.entity;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* A generic streamed entity being received on a connection.
*
* @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
*
* @version $Revision: 496070 $
*
* @since 4.0
*/
public class BasicHttpEntity extends AbstractHttpEntity {
private InputStream content;
private boolean contentObtained;
private long length;
/**
* Creates a new basic entity.
* The content is initially missing, the content length
* is set to a negative number.
*/
public BasicHttpEntity() {
super();
this.length = -1;
}
// non-javadoc, see interface HttpEntity
public long getContentLength() {
return this.length;
}
/**
* Obtains the content, once only.
*
* @return the content, if this is the first call to this method
* since {@link #setContent setContent} has been called
*
* @throws IllegalStateException
* if the content has been obtained before, or
* has not yet been provided
*/
public InputStream getContent()
throws IllegalStateException {
if (this.content == null) {
throw new IllegalStateException("Content has not been provided");
}
if (this.contentObtained) {
throw new IllegalStateException("Content has been consumed");
}
this.contentObtained = true;
return this.content;
} // getContent
/**
* Tells that this entity is not repeatable.
*
* @return <code>false</code>
*/
public boolean isRepeatable() {
return false;
}
/**
* Specifies the length of the content.
*
* @param len the number of bytes in the content, or
* a negative number to indicate an unknown length
*/
public void setContentLength(long len) {
this.length = len;
}
/**
* Specifies the content.
*
* @param instream the stream to return with the next call to
* {@link #getContent getContent}
*/
public void setContent(final InputStream instream) {
this.content = instream;
this.contentObtained = false;
}
// non-javadoc, see interface HttpEntity
public void writeTo(final OutputStream outstream) throws IOException {
if (outstream == null) {
throw new IllegalArgumentException("Output stream may not be null");
}
InputStream instream = getContent();
int l;
byte[] tmp = new byte[2048];
while ((l = instream.read(tmp)) != -1) {
outstream.write(tmp, 0, l);
}
}
// non-javadoc, see interface HttpEntity
public boolean isStreaming() {
return !this.contentObtained && this.content != null;
}
// non-javadoc, see interface HttpEntity
public void consumeContent() throws IOException {
if (content != null) {
content.close(); // reads to the end of the entity
}
}
} // class BasicHttpEntity
|
