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comparison: mobile/android/thirdparty/ch/boye/httpclientandroidlib/HttpMessage.java

mobile/android/thirdparty/ch/boye/httpclientandroidlib/HttpMessage.java

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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;
29
30 import ch.boye.httpclientandroidlib.params.HttpParams;
31
32 /**
33 * HTTP messages consist of requests from client to server and responses
34 * from server to client.
35 * <pre>
36 * HTTP-message = Request | Response ; HTTP/1.1 messages
37 * </pre>
38 * <p>
39 * HTTP messages use the generic message format of RFC 822 for
40 * transferring entities (the payload of the message). Both types
41 * of message consist of a start-line, zero or more header fields
42 * (also known as "headers"), an empty line (i.e., a line with nothing
43 * preceding the CRLF) indicating the end of the header fields,
44 * and possibly a message-body.
45 * </p>
46 * <pre>
47 * generic-message = start-line
48 * *(message-header CRLF)
49 * CRLF
50 * [ message-body ]
51 * start-line = Request-Line | Status-Line
52 * </pre>
53 *
54 * @since 4.0
55 */
56 public interface HttpMessage {
57
58 /**
59 * Returns the protocol version this message is compatible with.
60 */
61 ProtocolVersion getProtocolVersion();
62
63 /**
64 * Checks if a certain header is present in this message. Header values are
65 * ignored.
66 *
67 * @param name the header name to check for.
68 * @return true if at least one header with this name is present.
69 */
70 boolean containsHeader(String name);
71
72 /**
73 * Returns all the headers with a specified name of this message. Header values
74 * are ignored. Headers are orderd in the sequence they will be sent over a
75 * connection.
76 *
77 * @param name the name of the headers to return.
78 * @return the headers whose name property equals <code>name</code>.
79 */
80 Header[] getHeaders(String name);
81
82 /**
83 * Returns the first header with a specified name of this message. Header
84 * values are ignored. If there is more than one matching header in the
85 * message the first element of {@link #getHeaders(String)} is returned.
86 * If there is no matching header in the message <code>null</code> is
87 * returned.
88 *
89 * @param name the name of the header to return.
90 * @return the first header whose name property equals <code>name</code>
91 * or <code>null</code> if no such header could be found.
92 */
93 Header getFirstHeader(String name);
94
95 /**
96 * Returns the last header with a specified name of this message. Header values
97 * are ignored. If there is more than one matching header in the message the
98 * last element of {@link #getHeaders(String)} is returned. If there is no
99 * matching header in the message <code>null</code> is returned.
100 *
101 * @param name the name of the header to return.
102 * @return the last header whose name property equals <code>name</code>.
103 * or <code>null</code> if no such header could be found.
104 */
105 Header getLastHeader(String name);
106
107 /**
108 * Returns all the headers of this message. Headers are orderd in the sequence
109 * they will be sent over a connection.
110 *
111 * @return all the headers of this message
112 */
113 Header[] getAllHeaders();
114
115 /**
116 * Adds a header to this message. The header will be appended to the end of
117 * the list.
118 *
119 * @param header the header to append.
120 */
121 void addHeader(Header header);
122
123 /**
124 * Adds a header to this message. The header will be appended to the end of
125 * the list.
126 *
127 * @param name the name of the header.
128 * @param value the value of the header.
129 */
130 void addHeader(String name, String value);
131
132 /**
133 * Overwrites the first header with the same name. The new header will be appended to
134 * the end of the list, if no header with the given name can be found.
135 *
136 * @param header the header to set.
137 */
138 void setHeader(Header header);
139
140 /**
141 * Overwrites the first header with the same name. The new header will be appended to
142 * the end of the list, if no header with the given name can be found.
143 *
144 * @param name the name of the header.
145 * @param value the value of the header.
146 */
147 void setHeader(String name, String value);
148
149 /**
150 * Overwrites all the headers in the message.
151 *
152 * @param headers the array of headers to set.
153 */
154 void setHeaders(Header[] headers);
155
156 /**
157 * Removes a header from this message.
158 *
159 * @param header the header to remove.
160 */
161 void removeHeader(Header header);
162
163 /**
164 * Removes all headers with a certain name from this message.
165 *
166 * @param name The name of the headers to remove.
167 */
168 void removeHeaders(String name);
169
170 /**
171 * Returns an iterator of all the headers.
172 *
173 * @return Iterator that returns Header objects in the sequence they are
174 * sent over a connection.
175 */
176 HeaderIterator headerIterator();
177
178 /**
179 * Returns an iterator of the headers with a given name.
180 *
181 * @param name the name of the headers over which to iterate, or
182 * <code>null</code> for all headers
183 *
184 * @return Iterator that returns Header objects with the argument name
185 * in the sequence they are sent over a connection.
186 */
187 HeaderIterator headerIterator(String name);
188
189 /**
190 * Returns the parameters effective for this message as set by
191 * {@link #setParams(HttpParams)}.
192 */
193 HttpParams getParams();
194
195 /**
196 * Provides parameters to be used for the processing of this message.
197 * @param params the parameters
198 */
199 void setParams(HttpParams params);
200
201 }

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