224 lines
8.0 KiB
Java
224 lines
8.0 KiB
Java
/*
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* Conditions Of Use
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*
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* This software was developed by employees of the National Institute of
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* Standards and Technology (NIST), an agency of the Federal Government.
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* Pursuant to title 15 Untied States Code Section 105, works of NIST
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* employees are not subject to copyright protection in the United States
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* and are considered to be in the public domain. As a result, a formal
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* license is not needed to use the software.
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*
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* This software is provided by NIST as a service and is expressly
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* provided "AS IS." NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
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* OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
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* AND DATA ACCURACY. NIST does not warrant or make any representations
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* regarding the use of the software or the results thereof, including but
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* not limited to the correctness, accuracy, reliability or usefulness of
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* the software.
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*
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* Permission to use this software is contingent upon your acceptance
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* of the terms of this agreement
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*
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* .
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*
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*/
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package gov.nist.javax.sip.parser;
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import gov.nist.core.Debug;
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import gov.nist.core.LexerCore;
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import gov.nist.core.ParserCore;
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import gov.nist.core.Token;
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import java.text.ParseException;
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/**
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* Base parser class.
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*
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* @version 1.2 $Revision: 1.10 $ $Date: 2009/07/17 18:58:01 $
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*
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* @author M. Ranganathan <br/>
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*
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*
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*/
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public abstract class Parser extends ParserCore implements TokenTypes {
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protected ParseException createParseException(String exceptionString) {
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return new ParseException(
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lexer.getBuffer() + ":" + exceptionString,
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lexer.getPtr());
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}
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protected Lexer getLexer() {
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return (Lexer) this.lexer;
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}
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protected String sipVersion() throws ParseException {
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if (debug)
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dbg_enter("sipVersion");
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try {
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Token tok = lexer.match(SIP);
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if (!tok.getTokenValue().equalsIgnoreCase("SIP"))
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createParseException("Expecting SIP");
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lexer.match('/');
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tok = lexer.match(ID);
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if (!tok.getTokenValue().equals("2.0"))
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createParseException("Expecting SIP/2.0");
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return "SIP/2.0";
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} finally {
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if (debug)
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dbg_leave("sipVersion");
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}
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}
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/**
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* parses a method. Consumes if a valid method has been found.
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*/
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protected String method() throws ParseException {
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try {
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if (debug)
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dbg_enter("method");
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Token[] tokens = this.lexer.peekNextToken(1);
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Token token = (Token) tokens[0];
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if (token.getTokenType() == INVITE
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|| token.getTokenType() == ACK
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|| token.getTokenType() == OPTIONS
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|| token.getTokenType() == BYE
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|| token.getTokenType() == REGISTER
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|| token.getTokenType() == CANCEL
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|| token.getTokenType() == SUBSCRIBE
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|| token.getTokenType() == NOTIFY
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|| token.getTokenType() == PUBLISH
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|| token.getTokenType() == MESSAGE
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|| token.getTokenType() == ID) {
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lexer.consume();
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return token.getTokenValue();
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} else {
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throw createParseException("Invalid Method");
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}
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} finally {
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if (Debug.debug)
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dbg_leave("method");
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}
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}
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/**
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* Verifies that a given string matches the 'token' production in RFC3261
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*
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* @param token
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* @throws ParseException - if there are invalid characters
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*
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* @author JvB
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*/
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public static final void checkToken( String token ) throws ParseException {
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if (token == null || token.length()==0 ) {
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throw new ParseException("null or empty token", -1 );
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} else {
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// JvB: check that it is a valid token
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for ( int i=0; i<token.length(); ++i ) {
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if ( !LexerCore.isTokenChar( token.charAt(i) )) {
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throw new ParseException( "Invalid character(s) in string (not allowed in 'token')", i );
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}
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}
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}
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}
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}
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/*
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* $Log: Parser.java,v $
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* Revision 1.10 2009/07/17 18:58:01 emcho
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* Converts indentation tabs to spaces so that we have a uniform indentation policy in the whole project.
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*
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* Revision 1.9 2008/01/18 11:19:24 jbemmel
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* added a method to check strings for valid token characters
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*
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* Revision 1.8 2007/02/23 14:56:05 belangery
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* Added performance improvement around header name lowercase conversion.
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*
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* Revision 1.7 2006/09/27 15:02:43 mranga
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* Issue number:
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* Obtained from:
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* Submitted by:
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* Reviewed by: mranga
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* rfc 2543 transaction matching. fix for MESSAGE request type parsing.
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* CVS: ----------------------------------------------------------------------
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* CVS: Issue number:
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* CVS: If this change addresses one or more issues,
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* CVS: then enter the issue number(s) here.
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* CVS: Obtained from:
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* CVS: If this change has been taken from another system,
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* CVS: then name the system in this line, otherwise delete it.
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* CVS: Submitted by:
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* CVS: If this code has been contributed to the project by someone else; i.e.,
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* CVS: they sent us a patch or a set of diffs, then include their name/email
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* CVS: address here. If this is your work then delete this line.
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* CVS: Reviewed by:
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* CVS: If we are doing pre-commit code reviews and someone else has
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* CVS: reviewed your changes, include their name(s) here.
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* CVS: If you have not had it reviewed then delete this line.
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*
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* Revision 1.6 2006/07/13 09:02:18 mranga
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* Issue number:
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* Obtained from:
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* Submitted by: jeroen van bemmel
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* Reviewed by: mranga
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* Moved some changes from jain-sip-1.2 to java.net
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*
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* CVS: ----------------------------------------------------------------------
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* CVS: Issue number:
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* CVS: If this change addresses one or more issues,
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* CVS: then enter the issue number(s) here.
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* CVS: Obtained from:
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* CVS: If this change has been taken from another system,
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* CVS: then name the system in this line, otherwise delete it.
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* CVS: Submitted by:
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* CVS: If this code has been contributed to the project by someone else; i.e.,
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* CVS: they sent us a patch or a set of diffs, then include their name/email
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* CVS: address here. If this is your work then delete this line.
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* CVS: Reviewed by:
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* CVS: If we are doing pre-commit code reviews and someone else has
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* CVS: reviewed your changes, include their name(s) here.
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* CVS: If you have not had it reviewed then delete this line.
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*
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* Revision 1.5 2006/06/19 06:47:27 mranga
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* javadoc fixups
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*
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* Revision 1.4 2006/06/16 15:26:28 mranga
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* Added NIST disclaimer to all public domain files. Clean up some javadoc. Fixed a leak
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*
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* Revision 1.3 2005/11/21 23:24:49 jeroen
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* "SIP" is case insensitive
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*
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* Revision 1.2 2005/10/27 20:49:00 jeroen
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* added support for RFC3903 PUBLISH
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*
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* Revision 1.1.1.1 2005/10/04 17:12:35 mranga
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*
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* Import
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*
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*
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* Revision 1.3 2004/01/22 13:26:31 sverker
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* Issue number:
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* Obtained from:
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* Submitted by: sverker
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* Reviewed by: mranga
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*
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* Major reformat of code to conform with style guide. Resolved compiler and javadoc warnings. Added CVS tags.
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*
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* CVS: ----------------------------------------------------------------------
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* CVS: Issue number:
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* CVS: If this change addresses one or more issues,
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* CVS: then enter the issue number(s) here.
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* CVS: Obtained from:
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* CVS: If this change has been taken from another system,
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* CVS: then name the system in this line, otherwise delete it.
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* CVS: Submitted by:
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* CVS: If this code has been contributed to the project by someone else; i.e.,
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* CVS: they sent us a patch or a set of diffs, then include their name/email
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* CVS: address here. If this is your work then delete this line.
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* CVS: Reviewed by:
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* CVS: If we are doing pre-commit code reviews and someone else has
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* CVS: reviewed your changes, include their name(s) here.
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* CVS: If you have not had it reviewed then delete this line.
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*
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*/
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