1 /* 2 * Conditions Of Use 3 * 4 * This software was developed by employees of the National Institute of 5 * Standards and Technology (NIST), an agency of the Federal Government. 6 * Pursuant to title 15 Untied States Code Section 105, works of NIST 7 * employees are not subject to copyright protection in the United States 8 * and are considered to be in the public domain. As a result, a formal 9 * license is not needed to use the software. 10 * 11 * This software is provided by NIST as a service and is expressly 12 * provided "AS IS." NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED 13 * OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF 14 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT 15 * AND DATA ACCURACY. NIST does not warrant or make any representations 16 * regarding the use of the software or the results thereof, including but 17 * not limited to the correctness, accuracy, reliability or usefulness of 18 * the software. 19 * 20 * Permission to use this software is contingent upon your acceptance 21 * of the terms of this agreement 22 * 23 * . 24 * 25 */ 26 package gov.nist.javax.sip.parser; 27 import gov.nist.javax.sip.header.*; 28 import gov.nist.core.*; 29 import java.text.ParseException; 30 import javax.sip.*; 31 32 /** 33 * Accept-Encoding SIP (HTTP) Header parser. 34 * 35 * @version 1.2 $Revision: 1.7 $ $Date: 2009/07/17 18:57:56 $ 36 * 37 * @author Olivier Deruelle 38 * @author M. Ranganathan 39 * 40 * 41 * <pre> 42 * 43 * The Accept-Encoding request-header field is similar to Accept, but 44 * restricts the content-codings (section 3.5) that are acceptable in 45 * the response. 46 * 47 * 48 * Accept-Encoding = "Accept-Encoding" ":" 49 * ( encoding *( "," encoding) ) 50 * encoding = ( codings *[ ";" "q" "=" qvalue ] ) 51 * codings = ( content-coding | "*" ) 52 * 53 * Examples of its use are: 54 * 55 * Accept-Encoding: compress, gzip 56 * Accept-Encoding: 57 * Accept-Encoding: * 58 * Accept-Encoding: compress;q=0.5, gzip;q=1.0 59 * Accept-Encoding: gzip;q=1.0, identity; q=0.5, *;q=0 60 * </pre> 61 * 62 */ 63 public class AcceptEncodingParser extends HeaderParser { 64 65 /** 66 * Constructor 67 * @param acceptEncoding message to parse 68 */ AcceptEncodingParser(String acceptEncoding)69 public AcceptEncodingParser(String acceptEncoding) { 70 super(acceptEncoding); 71 } 72 73 /** 74 * Constructor 75 * @param lexer Lexer to set 76 */ AcceptEncodingParser(Lexer lexer)77 protected AcceptEncodingParser(Lexer lexer) { 78 super(lexer); 79 } 80 81 /** 82 * parse the String message 83 * @return SIPHeader (AcceptEncoding object) 84 * @throws ParseException if the message does not respect the spec. 85 */ parse()86 public SIPHeader parse() throws ParseException { 87 AcceptEncodingList acceptEncodingList = new AcceptEncodingList(); 88 if (debug) 89 dbg_enter("AcceptEncodingParser.parse"); 90 91 try { 92 headerName(TokenTypes.ACCEPT_ENCODING); 93 // empty body is fine for this header. 94 if (lexer.lookAhead(0) == '\n') { 95 AcceptEncoding acceptEncoding = new AcceptEncoding(); 96 acceptEncodingList.add(acceptEncoding); 97 } else { 98 while (lexer.lookAhead(0) != '\n') { 99 AcceptEncoding acceptEncoding = new AcceptEncoding(); 100 if (lexer.lookAhead(0) != ';') { 101 // Content-Coding: 102 lexer.match(TokenTypes.ID); 103 Token value = lexer.getNextToken(); 104 acceptEncoding.setEncoding(value.getTokenValue()); 105 } 106 107 while (lexer.lookAhead(0) == ';') { 108 this.lexer.match(';'); 109 this.lexer.SPorHT(); 110 this.lexer.match('q'); 111 this.lexer.SPorHT(); 112 this.lexer.match('='); 113 this.lexer.SPorHT(); 114 lexer.match(TokenTypes.ID); 115 Token value = lexer.getNextToken(); 116 try { 117 float qv = Float.parseFloat(value.getTokenValue()); 118 acceptEncoding.setQValue(qv); 119 } catch (NumberFormatException ex) { 120 throw createParseException(ex.getMessage()); 121 } catch (InvalidArgumentException ex) { 122 throw createParseException(ex.getMessage()); 123 } 124 this.lexer.SPorHT(); 125 } 126 127 acceptEncodingList.add(acceptEncoding); 128 if (lexer.lookAhead(0) == ',') { 129 this.lexer.match(','); 130 this.lexer.SPorHT(); 131 } 132 133 } 134 } 135 return acceptEncodingList; 136 } finally { 137 if (debug) 138 dbg_leave("AcceptEncodingParser.parse"); 139 } 140 } 141 } 142 /* 143 * $Log: AcceptEncodingParser.java,v $ 144 * Revision 1.7 2009/07/17 18:57:56 emcho 145 * Converts indentation tabs to spaces so that we have a uniform indentation policy in the whole project. 146 * 147 * Revision 1.6 2006/07/13 09:02:03 mranga 148 * Issue number: 149 * Obtained from: 150 * Submitted by: jeroen van bemmel 151 * Reviewed by: mranga 152 * Moved some changes from jain-sip-1.2 to java.net 153 * 154 * CVS: ---------------------------------------------------------------------- 155 * CVS: Issue number: 156 * CVS: If this change addresses one or more issues, 157 * CVS: then enter the issue number(s) here. 158 * CVS: Obtained from: 159 * CVS: If this change has been taken from another system, 160 * CVS: then name the system in this line, otherwise delete it. 161 * CVS: Submitted by: 162 * CVS: If this code has been contributed to the project by someone else; i.e., 163 * CVS: they sent us a patch or a set of diffs, then include their name/email 164 * CVS: address here. If this is your work then delete this line. 165 * CVS: Reviewed by: 166 * CVS: If we are doing pre-commit code reviews and someone else has 167 * CVS: reviewed your changes, include their name(s) here. 168 * CVS: If you have not had it reviewed then delete this line. 169 * 170 * Revision 1.3 2006/06/19 06:47:27 mranga 171 * javadoc fixups 172 * 173 * Revision 1.2 2006/06/16 15:26:28 mranga 174 * Added NIST disclaimer to all public domain files. Clean up some javadoc. Fixed a leak 175 * 176 * Revision 1.1.1.1 2005/10/04 17:12:35 mranga 177 * 178 * Import 179 * 180 * 181 * Revision 1.4 2004/01/22 13:26:31 sverker 182 * Issue number: 183 * Obtained from: 184 * Submitted by: sverker 185 * Reviewed by: mranga 186 * 187 * Major reformat of code to conform with style guide. Resolved compiler and javadoc warnings. Added CVS tags. 188 * 189 * CVS: ---------------------------------------------------------------------- 190 * CVS: Issue number: 191 * CVS: If this change addresses one or more issues, 192 * CVS: then enter the issue number(s) here. 193 * CVS: Obtained from: 194 * CVS: If this change has been taken from another system, 195 * CVS: then name the system in this line, otherwise delete it. 196 * CVS: Submitted by: 197 * CVS: If this code has been contributed to the project by someone else; i.e., 198 * CVS: they sent us a patch or a set of diffs, then include their name/email 199 * CVS: address here. If this is your work then delete this line. 200 * CVS: Reviewed by: 201 * CVS: If we are doing pre-commit code reviews and someone else has 202 * CVS: reviewed your changes, include their name(s) here. 203 * CVS: If you have not had it reviewed then delete this line. 204 * 205 */ 206