1/*
2 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/protocol/HTTP.java $
3 * $Revision: 555989 $
4 * $Date: 2007-07-13 06:33:39 -0700 (Fri, 13 Jul 2007) $
5 *
6 * ====================================================================
7 * Licensed to the Apache Software Foundation (ASF) under one
8 * or more contributor license agreements.  See the NOTICE file
9 * distributed with this work for additional information
10 * regarding copyright ownership.  The ASF licenses this file
11 * to you under the Apache License, Version 2.0 (the
12 * "License"); you may not use this file except in compliance
13 * with the License.  You may obtain a copy of the License at
14 *
15 *   http://www.apache.org/licenses/LICENSE-2.0
16 *
17 * Unless required by applicable law or agreed to in writing,
18 * software distributed under the License is distributed on an
19 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
20 * KIND, either express or implied.  See the License for the
21 * specific language governing permissions and limitations
22 * under the License.
23 * ====================================================================
24 *
25 * This software consists of voluntary contributions made by many
26 * individuals on behalf of the Apache Software Foundation.  For more
27 * information on the Apache Software Foundation, please see
28 * <http://www.apache.org/>.
29 *
30 */
31
32package org.apache.http.protocol;
33
34/**
35 * Constants and static helpers related to the HTTP protocol.
36 *
37 * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
38 *
39 * @version $Revision: 555989 $
40 *
41 * @since 4.0
42 */
43public final class HTTP {
44
45    public static final int CR = 13; // <US-ASCII CR, carriage return (13)>
46    public static final int LF = 10; // <US-ASCII LF, linefeed (10)>
47    public static final int SP = 32; // <US-ASCII SP, space (32)>
48    public static final int HT = 9;  // <US-ASCII HT, horizontal-tab (9)>
49
50    /** HTTP header definitions */
51    public static final String TRANSFER_ENCODING = "Transfer-Encoding";
52    public static final String CONTENT_LEN  = "Content-Length";
53    public static final String CONTENT_TYPE = "Content-Type";
54    public static final String CONTENT_ENCODING = "Content-Encoding";
55    public static final String EXPECT_DIRECTIVE = "Expect";
56    public static final String CONN_DIRECTIVE = "Connection";
57    public static final String TARGET_HOST = "Host";
58    public static final String USER_AGENT = "User-Agent";
59    public static final String DATE_HEADER = "Date";
60    public static final String SERVER_HEADER = "Server";
61
62    /** HTTP expectations */
63    public static final String EXPECT_CONTINUE = "100-continue";
64
65    /** HTTP connection control */
66    public static final String CONN_CLOSE = "Close";
67    public static final String CONN_KEEP_ALIVE = "Keep-Alive";
68
69    /** Transfer encoding definitions */
70    public static final String CHUNK_CODING = "chunked";
71    public static final String IDENTITY_CODING = "identity";
72
73    /** Common charset definitions */
74    public static final String UTF_8 = "UTF-8";
75    public static final String UTF_16 = "UTF-16";
76    public static final String US_ASCII = "US-ASCII";
77    public static final String ASCII = "ASCII";
78    public static final String ISO_8859_1 = "ISO-8859-1";
79
80    /** Default charsets */
81    public static final String DEFAULT_CONTENT_CHARSET = ISO_8859_1;
82    public static final String DEFAULT_PROTOCOL_CHARSET = US_ASCII;
83
84    /** Content type definitions */
85    public final static String OCTET_STREAM_TYPE = "application/octet-stream";
86    public final static String PLAIN_TEXT_TYPE = "text/plain";
87    public final static String CHARSET_PARAM = "; charset=";
88
89    /** Default content type */
90    public final static String DEFAULT_CONTENT_TYPE = OCTET_STREAM_TYPE;
91
92    public static boolean isWhitespace(char ch) {
93        return ch == SP || ch == HT || ch == CR || ch == LF;
94    }
95
96    private HTTP() {
97    }
98
99}
100