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.core.Debug; 28 import gov.nist.core.LexerCore; 29 import gov.nist.core.ParserCore; 30 import gov.nist.core.Token; 31 import java.text.ParseException; 32 33 /** 34 * Base parser class. 35 * 36 * @version 1.2 $Revision: 1.10 $ $Date: 2009/07/17 18:58:01 $ 37 * 38 * @author M. Ranganathan <br/> 39 * 40 * 41 */ 42 public abstract class Parser extends ParserCore implements TokenTypes { 43 44 protected ParseException createParseException(String exceptionString) { 45 return new ParseException( 46 lexer.getBuffer() + ":" + exceptionString, 47 lexer.getPtr()); 48 } 49 50 protected Lexer getLexer() { 51 return (Lexer) this.lexer; 52 } 53 54 protected String sipVersion() throws ParseException { 55 if (debug) 56 dbg_enter("sipVersion"); 57 try { 58 Token tok = lexer.match(SIP); 59 if (!tok.getTokenValue().equalsIgnoreCase("SIP")) 60 createParseException("Expecting SIP"); 61 lexer.match('/'); 62 tok = lexer.match(ID); 63 if (!tok.getTokenValue().equals("2.0")) 64 createParseException("Expecting SIP/2.0"); 65 66 return "SIP/2.0"; 67 } finally { 68 if (debug) 69 dbg_leave("sipVersion"); 70 } 71 } 72 73 /** 74 * parses a method. Consumes if a valid method has been found. 75 */ 76 protected String method() throws ParseException { 77 try { 78 if (debug) 79 dbg_enter("method"); 80 Token[] tokens = this.lexer.peekNextToken(1); 81 Token token = (Token) tokens[0]; 82 if (token.getTokenType() == INVITE 83 || token.getTokenType() == ACK 84 || token.getTokenType() == OPTIONS 85 || token.getTokenType() == BYE 86 || token.getTokenType() == REGISTER 87 || token.getTokenType() == CANCEL 88 || token.getTokenType() == SUBSCRIBE 89 || token.getTokenType() == NOTIFY 90 || token.getTokenType() == PUBLISH 91 || token.getTokenType() == MESSAGE 92 || token.getTokenType() == ID) { 93 lexer.consume(); 94 return token.getTokenValue(); 95 } else { 96 throw createParseException("Invalid Method"); 97 } 98 } finally { 99 if (Debug.debug) 100 dbg_leave("method"); 101 } 102 } 103 104 /** 105 * Verifies that a given string matches the 'token' production in RFC3261 106 * 107 * @param token 108 * @throws ParseException - if there are invalid characters 109 * 110 * @author JvB 111 */ 112 public static final void checkToken( String token ) throws ParseException { 113 114 if (token == null || token.length()==0 ) { 115 throw new ParseException("null or empty token", -1 ); 116 } else { 117 // JvB: check that it is a valid token 118 for ( int i=0; i<token.length(); ++i ) { 119 if ( !LexerCore.isTokenChar( token.charAt(i) )) { 120 throw new ParseException( "Invalid character(s) in string (not allowed in 'token')", i ); 121 } 122 } 123 } 124 } 125 } 126 /* 127 * $Log: Parser.java,v $ 128 * Revision 1.10 2009/07/17 18:58:01 emcho 129 * Converts indentation tabs to spaces so that we have a uniform indentation policy in the whole project. 130 * 131 * Revision 1.9 2008/01/18 11:19:24 jbemmel 132 * added a method to check strings for valid token characters 133 * 134 * Revision 1.8 2007/02/23 14:56:05 belangery 135 * Added performance improvement around header name lowercase conversion. 136 * 137 * Revision 1.7 2006/09/27 15:02:43 mranga 138 * Issue number: 139 * Obtained from: 140 * Submitted by: 141 * Reviewed by: mranga 142 * rfc 2543 transaction matching. fix for MESSAGE request type parsing. 143 * CVS: ---------------------------------------------------------------------- 144 * CVS: Issue number: 145 * CVS: If this change addresses one or more issues, 146 * CVS: then enter the issue number(s) here. 147 * CVS: Obtained from: 148 * CVS: If this change has been taken from another system, 149 * CVS: then name the system in this line, otherwise delete it. 150 * CVS: Submitted by: 151 * CVS: If this code has been contributed to the project by someone else; i.e., 152 * CVS: they sent us a patch or a set of diffs, then include their name/email 153 * CVS: address here. If this is your work then delete this line. 154 * CVS: Reviewed by: 155 * CVS: If we are doing pre-commit code reviews and someone else has 156 * CVS: reviewed your changes, include their name(s) here. 157 * CVS: If you have not had it reviewed then delete this line. 158 * 159 * Revision 1.6 2006/07/13 09:02:18 mranga 160 * Issue number: 161 * Obtained from: 162 * Submitted by: jeroen van bemmel 163 * Reviewed by: mranga 164 * Moved some changes from jain-sip-1.2 to java.net 165 * 166 * CVS: ---------------------------------------------------------------------- 167 * CVS: Issue number: 168 * CVS: If this change addresses one or more issues, 169 * CVS: then enter the issue number(s) here. 170 * CVS: Obtained from: 171 * CVS: If this change has been taken from another system, 172 * CVS: then name the system in this line, otherwise delete it. 173 * CVS: Submitted by: 174 * CVS: If this code has been contributed to the project by someone else; i.e., 175 * CVS: they sent us a patch or a set of diffs, then include their name/email 176 * CVS: address here. If this is your work then delete this line. 177 * CVS: Reviewed by: 178 * CVS: If we are doing pre-commit code reviews and someone else has 179 * CVS: reviewed your changes, include their name(s) here. 180 * CVS: If you have not had it reviewed then delete this line. 181 * 182 * Revision 1.5 2006/06/19 06:47:27 mranga 183 * javadoc fixups 184 * 185 * Revision 1.4 2006/06/16 15:26:28 mranga 186 * Added NIST disclaimer to all public domain files. Clean up some javadoc. Fixed a leak 187 * 188 * Revision 1.3 2005/11/21 23:24:49 jeroen 189 * "SIP" is case insensitive 190 * 191 * Revision 1.2 2005/10/27 20:49:00 jeroen 192 * added support for RFC3903 PUBLISH 193 * 194 * Revision 1.1.1.1 2005/10/04 17:12:35 mranga 195 * 196 * Import 197 * 198 * 199 * Revision 1.3 2004/01/22 13:26:31 sverker 200 * Issue number: 201 * Obtained from: 202 * Submitted by: sverker 203 * Reviewed by: mranga 204 * 205 * Major reformat of code to conform with style guide. Resolved compiler and javadoc warnings. Added CVS tags. 206 * 207 * CVS: ---------------------------------------------------------------------- 208 * CVS: Issue number: 209 * CVS: If this change addresses one or more issues, 210 * CVS: then enter the issue number(s) here. 211 * CVS: Obtained from: 212 * CVS: If this change has been taken from another system, 213 * CVS: then name the system in this line, otherwise delete it. 214 * CVS: Submitted by: 215 * CVS: If this code has been contributed to the project by someone else; i.e., 216 * CVS: they sent us a patch or a set of diffs, then include their name/email 217 * CVS: address here. If this is your work then delete this line. 218 * CVS: Reviewed by: 219 * CVS: If we are doing pre-commit code reviews and someone else has 220 * CVS: reviewed your changes, include their name(s) here. 221 * CVS: If you have not had it reviewed then delete this line. 222 * 223 */ 224
