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comparison: mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/entity/EntityDeserializer.java

mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/entity/EntityDeserializer.java

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TOR_BUG_3246
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-1:000000000000 0:a3fb749428ff
1 /*
2 * ====================================================================
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 * ====================================================================
20 *
21 * This software consists of voluntary contributions made by many
22 * individuals on behalf of the Apache Software Foundation. For more
23 * information on the Apache Software Foundation, please see
24 * <http://www.apache.org/>.
25 *
26 */
27
28 package ch.boye.httpclientandroidlib.impl.entity;
29
30 import java.io.IOException;
31
32 import ch.boye.httpclientandroidlib.Header;
33 import ch.boye.httpclientandroidlib.HttpEntity;
34 import ch.boye.httpclientandroidlib.HttpException;
35 import ch.boye.httpclientandroidlib.HttpMessage;
36 import ch.boye.httpclientandroidlib.entity.BasicHttpEntity;
37 import ch.boye.httpclientandroidlib.entity.ContentLengthStrategy;
38 import ch.boye.httpclientandroidlib.impl.io.ChunkedInputStream;
39 import ch.boye.httpclientandroidlib.impl.io.ContentLengthInputStream;
40 import ch.boye.httpclientandroidlib.impl.io.IdentityInputStream;
41 import ch.boye.httpclientandroidlib.io.SessionInputBuffer;
42 import ch.boye.httpclientandroidlib.protocol.HTTP;
43
44 /**
45 * HTTP entity deserializer.
46 * <p>
47 * This entity deserializer supports "chunked" and "identitiy" transfer-coding
48 * and content length delimited content.
49 * <p>
50 * This class relies on a specific implementation of
51 * {@link ContentLengthStrategy} to determine the content length or transfer
52 * encoding of the entity.
53 * <p>
54 * This class generates an instance of {@link HttpEntity} based on
55 * properties of the message. The content of the entity will be decoded
56 * transparently for the consumer.
57 *
58 * @since 4.0
59 */
60 public class EntityDeserializer {
61
62 private final ContentLengthStrategy lenStrategy;
63
64 public EntityDeserializer(final ContentLengthStrategy lenStrategy) {
65 super();
66 if (lenStrategy == null) {
67 throw new IllegalArgumentException("Content length strategy may not be null");
68 }
69 this.lenStrategy = lenStrategy;
70 }
71
72 /**
73 * Creates a {@link BasicHttpEntity} based on properties of the given
74 * message. The content of the entity is created by wrapping
75 * {@link SessionInputBuffer} with a content decoder depending on the
76 * transfer mechanism used by the message.
77 * <p>
78 * This method is called by the public
79 * {@link #deserialize(SessionInputBuffer, HttpMessage)}.
80 *
81 * @param inbuffer the session input buffer.
82 * @param message the message.
83 * @return HTTP entity.
84 * @throws HttpException in case of HTTP protocol violation.
85 * @throws IOException in case of an I/O error.
86 */
87 protected BasicHttpEntity doDeserialize(
88 final SessionInputBuffer inbuffer,
89 final HttpMessage message) throws HttpException, IOException {
90 BasicHttpEntity entity = new BasicHttpEntity();
91
92 long len = this.lenStrategy.determineLength(message);
93 if (len == ContentLengthStrategy.CHUNKED) {
94 entity.setChunked(true);
95 entity.setContentLength(-1);
96 entity.setContent(new ChunkedInputStream(inbuffer));
97 } else if (len == ContentLengthStrategy.IDENTITY) {
98 entity.setChunked(false);
99 entity.setContentLength(-1);
100 entity.setContent(new IdentityInputStream(inbuffer));
101 } else {
102 entity.setChunked(false);
103 entity.setContentLength(len);
104 entity.setContent(new ContentLengthInputStream(inbuffer, len));
105 }
106
107 Header contentTypeHeader = message.getFirstHeader(HTTP.CONTENT_TYPE);
108 if (contentTypeHeader != null) {
109 entity.setContentType(contentTypeHeader);
110 }
111 Header contentEncodingHeader = message.getFirstHeader(HTTP.CONTENT_ENCODING);
112 if (contentEncodingHeader != null) {
113 entity.setContentEncoding(contentEncodingHeader);
114 }
115 return entity;
116 }
117
118 /**
119 * Creates an {@link HttpEntity} based on properties of the given message.
120 * The content of the entity is created by wrapping
121 * {@link SessionInputBuffer} with a content decoder depending on the
122 * transfer mechanism used by the message.
123 * <p>
124 * The content of the entity is NOT retrieved by this method.
125 *
126 * @param inbuffer the session input buffer.
127 * @param message the message.
128 * @return HTTP entity.
129 * @throws HttpException in case of HTTP protocol violation.
130 * @throws IOException in case of an I/O error.
131 */
132 public HttpEntity deserialize(
133 final SessionInputBuffer inbuffer,
134 final HttpMessage message) throws HttpException, IOException {
135 if (inbuffer == null) {
136 throw new IllegalArgumentException("Session input buffer may not be null");
137 }
138 if (message == null) {
139 throw new IllegalArgumentException("HTTP message may not be null");
140 }
141 return doDeserialize(inbuffer, message);
142 }
143
144 }

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