/*
* Conditions Of Use
*
* This software was developed by employees of the National Institute of
* Standards and Technology (NIST), an agency of the Federal Government.
* Pursuant to title 15 Untied States Code Section 105, works of NIST
* employees are not subject to copyright protection in the United States
* and are considered to be in the public domain. As a result, a formal
* license is not needed to use the software.
*
* This software is provided by NIST as a service and is expressly
* provided "AS IS." NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
* OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
* AND DATA ACCURACY. NIST does not warrant or make any representations
* regarding the use of the software or the results thereof, including but
* not limited to the correctness, accuracy, reliability or usefulness of
* the software.
*
* Permission to use this software is contingent upon your acceptance
* of the terms of this agreement
*
* .
*
*/
package gov.nist.javax.sip.parser;
import gov.nist.javax.sip.header.*;
import gov.nist.core.*;
import java.text.ParseException;
import javax.sip.*;
/**
* Accept-Encoding SIP (HTTP) Header parser.
*
* @version 1.2 $Revision: 1.7 $ $Date: 2009-07-17 18:57:56 $
*
* @author Olivier Deruelle
* @author M. Ranganathan
*
*
* <pre>
*
* The Accept-Encoding request-header field is similar to Accept, but
* restricts the content-codings (section 3.5) that are acceptable in
* the response.
*
*
* Accept-Encoding = "Accept-Encoding" ":"
* ( encoding *( "," encoding) )
* encoding = ( codings *[ ";" "q" "=" qvalue ] )
* codings = ( content-coding | "*" )
*
* Examples of its use are:
*
* Accept-Encoding: compress, gzip
* Accept-Encoding:
* Accept-Encoding: *
* Accept-Encoding: compress;q=0.5, gzip;q=1.0
* Accept-Encoding: gzip;q=1.0, identity; q=0.5, *;q=0
* </pre>
*
*/
public class AcceptEncodingParser extends HeaderParser {
/**
* Constructor
* @param acceptEncoding message to parse
*/
public AcceptEncodingParser(String acceptEncoding) {
super(acceptEncoding);
}
/**
* Constructor
* @param lexer Lexer to set
*/
protected AcceptEncodingParser(Lexer lexer) {
super(lexer);
}
/**
* parse the String message
* @return SIPHeader (AcceptEncoding object)
* @throws ParseException if the message does not respect the spec.
*/
public SIPHeader parse() throws ParseException {
AcceptEncodingList acceptEncodingList = new AcceptEncodingList();
if (debug)
dbg_enter("AcceptEncodingParser.parse");
try {
headerName(TokenTypes.ACCEPT_ENCODING);
// empty body is fine for this header.
if (!lexer.startsId()) {
AcceptEncoding acceptEncoding = new AcceptEncoding();
acceptEncodingList.add(acceptEncoding);
} else {
do {
AcceptEncoding acceptEncoding = new AcceptEncoding();
if (lexer.startsId()) {
Token value = lexer.match(TokenTypes.ID);
acceptEncoding.setEncoding(value.getTokenValue());
while (lexer.lookAhead(0) == ';') {
this.lexer.match(';');
this.lexer.SPorHT();
Token pname = lexer.match(TokenTypes.ID); // JvB Also allows generic param!
this.lexer.SPorHT();
if ( lexer.lookAhead() == '=' ) {
this.lexer.match('=');
this.lexer.SPorHT();
value = lexer.match(TokenTypes.ID);
if ( pname.getTokenValue().equalsIgnoreCase("q")) {
try {
float qv = Float.parseFloat(value.getTokenValue());
acceptEncoding.setQValue(qv);
} catch (NumberFormatException ex) {
throw createParseException(ex.getMessage());
} catch (InvalidArgumentException ex) {
throw createParseException(ex.getMessage());
}
} else {
acceptEncoding.setParameter( pname.getTokenValue(), value.getTokenValue() );
}
this.lexer.SPorHT();
} else acceptEncoding.setParameter( pname.getTokenValue(), "" );
}
}
acceptEncodingList.add(acceptEncoding);
if (lexer.lookAhead(0) == ',') {
this.lexer.match(',');
this.lexer.SPorHT();
} else break;
} while (true);
}
return acceptEncodingList;
} finally {
if (debug)
dbg_leave("AcceptEncodingParser.parse");
}
}
}
/*
* $Log: not supported by cvs2svn $
* Revision 1.6 2006/07/13 09:02:03 mranga
* Issue number:
* Obtained from:
* Submitted by: jeroen van bemmel
* Reviewed by: mranga
* Moved some changes from jain-sip-1.2 to java.net
*
* CVS: ----------------------------------------------------------------------
* CVS: Issue number:
* CVS: If this change addresses one or more issues,
* CVS: then enter the issue number(s) here.
* CVS: Obtained from:
* CVS: If this change has been taken from another system,
* CVS: then name the system in this line, otherwise delete it.
* CVS: Submitted by:
* CVS: If this code has been contributed to the project by someone else; i.e.,
* CVS: they sent us a patch or a set of diffs, then include their name/email
* CVS: address here. If this is your work then delete this line.
* CVS: Reviewed by:
* CVS: If we are doing pre-commit code reviews and someone else has
* CVS: reviewed your changes, include their name(s) here.
* CVS: If you have not had it reviewed then delete this line.
*
* Revision 1.3 2006/06/19 06:47:27 mranga
* javadoc fixups
*
* Revision 1.2 2006/06/16 15:26:28 mranga
* Added NIST disclaimer to all public domain files. Clean up some javadoc. Fixed a leak
*
* Revision 1.1.1.1 2005/10/04 17:12:35 mranga
*
* Import
*
*
* Revision 1.4 2004/01/22 13:26:31 sverker
* Issue number:
* Obtained from:
* Submitted by: sverker
* Reviewed by: mranga
*
* Major reformat of code to conform with style guide. Resolved compiler and javadoc warnings. Added CVS tags.
*
* CVS: ----------------------------------------------------------------------
* CVS: Issue number:
* CVS: If this change addresses one or more issues,
* CVS: then enter the issue number(s) here.
* CVS: Obtained from:
* CVS: If this change has been taken from another system,
* CVS: then name the system in this line, otherwise delete it.
* CVS: Submitted by:
* CVS: If this code has been contributed to the project by someone else; i.e.,
* CVS: they sent us a patch or a set of diffs, then include their name/email
* CVS: address here. If this is your work then delete this line.
* CVS: Reviewed by:
* CVS: If we are doing pre-commit code reviews and someone else has
* CVS: reviewed your changes, include their name(s) here.
* CVS: If you have not had it reviewed then delete this line.
*
*/