1 /* 2 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/message/LineParser.java $ 3 * $Revision: 589374 $ 4 * $Date: 2007-10-28 09:25:07 -0700 (Sun, 28 Oct 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 32 package org.apache.http.message; 33 34 35 import org.apache.http.ProtocolVersion; 36 import org.apache.http.ParseException; 37 import org.apache.http.RequestLine; 38 import org.apache.http.StatusLine; 39 import org.apache.http.Header; 40 import org.apache.http.util.CharArrayBuffer; 41 42 43 /** 44 * Interface for parsing lines in the HEAD section of an HTTP message. 45 * There are individual methods for parsing a request line, a 46 * status line, or a header line. 47 * The lines to parse are passed in memory, the parser does not depend 48 * on any specific IO mechanism. 49 * Instances of this interface are expected to be stateless and thread-safe. 50 * 51 * @author <a href="mailto:rolandw AT apache.org">Roland Weber</a> 52 * 53 * 54 * <!-- empty lines above to avoid 'svn diff' context problems --> 55 * @version $Revision: 589374 $ $Date: 2007-10-28 09:25:07 -0700 (Sun, 28 Oct 2007) $ 56 * 57 * @since 4.0 58 * 59 * @deprecated Please use {@link java.net.URL#openConnection} instead. 60 * Please visit <a href="http://android-developers.blogspot.com/2011/09/androids-http-clients.html">this webpage</a> 61 * for further details. 62 */ 63 @Deprecated 64 public interface LineParser { 65 66 67 /** 68 * Parses the textual representation of a protocol version. 69 * This is needed for parsing request lines (last element) 70 * as well as status lines (first element). 71 * 72 * @param buffer a buffer holding the protocol version to parse 73 * @param cursor the parser cursor containing the current position and 74 * the bounds within the buffer for the parsing operation 75 * 76 * @return the parsed protocol version 77 * 78 * @throws ParseException in case of a parse error 79 */ 80 ProtocolVersion parseProtocolVersion( 81 CharArrayBuffer buffer, 82 ParserCursor cursor) throws ParseException; 83 84 85 /** 86 * Checks whether there likely is a protocol version in a line. 87 * This method implements a <i>heuristic</i> to check for a 88 * likely protocol version specification. It does <i>not</i> 89 * guarantee that {@link #parseProtocolVersion} would not 90 * detect a parse error. 91 * This can be used to detect garbage lines before a request 92 * or status line. 93 * 94 * @param buffer a buffer holding the line to inspect 95 * @param cursor the cursor at which to check for a protocol version, or 96 * negative for "end of line". Whether the check tolerates 97 * whitespace before or after the protocol version is 98 * implementation dependent. 99 * 100 * @return <code>true</code> if there is a protocol version at the 101 * argument index (possibly ignoring whitespace), 102 * <code>false</code> otherwise 103 */ 104 boolean hasProtocolVersion( 105 CharArrayBuffer buffer, 106 ParserCursor cursor); 107 108 109 /** 110 * Parses a request line. 111 * 112 * @param buffer a buffer holding the line to parse 113 * @param cursor the parser cursor containing the current position and 114 * the bounds within the buffer for the parsing operation 115 * 116 * @return the parsed request line 117 * 118 * @throws ParseException in case of a parse error 119 */ 120 RequestLine parseRequestLine( 121 CharArrayBuffer buffer, 122 ParserCursor cursor) throws ParseException; 123 124 125 /** 126 * Parses a status line. 127 * 128 * @param buffer a buffer holding the line to parse 129 * @param cursor the parser cursor containing the current position and 130 * the bounds within the buffer for the parsing operation 131 * 132 * @return the parsed status line 133 * 134 * @throws ParseException in case of a parse error 135 */ 136 StatusLine parseStatusLine( 137 CharArrayBuffer buffer, 138 ParserCursor cursor) throws ParseException; 139 140 141 /** 142 * Creates a header from a line. 143 * The full header line is expected here. Header continuation lines 144 * must be joined by the caller before invoking this method. 145 * 146 * @param buffer a buffer holding the full header line. 147 * This buffer MUST NOT be re-used afterwards, since 148 * the returned object may reference the contents later. 149 * 150 * @return the header in the argument buffer. 151 * The returned object MAY be a wrapper for the argument buffer. 152 * The argument buffer MUST NOT be re-used or changed afterwards. 153 * 154 * @throws ParseException in case of a parse error 155 */ 156 Header parseHeader(CharArrayBuffer buffer) 157 throws ParseException 158 ; 159 160 161 } 162
