/* * 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 * * *
 *
 *   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
 * 
* */ 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.lookAhead(0) == '\n') { AcceptEncoding acceptEncoding = new AcceptEncoding(); acceptEncodingList.add(acceptEncoding); } else { while (lexer.lookAhead(0) != '\n') { AcceptEncoding acceptEncoding = new AcceptEncoding(); if (lexer.lookAhead(0) != ';') { // Content-Coding: lexer.match(TokenTypes.ID); Token value = lexer.getNextToken(); acceptEncoding.setEncoding(value.getTokenValue()); } while (lexer.lookAhead(0) == ';') { this.lexer.match(';'); this.lexer.SPorHT(); this.lexer.match('q'); this.lexer.SPorHT(); this.lexer.match('='); this.lexer.SPorHT(); lexer.match(TokenTypes.ID); Token value = lexer.getNextToken(); try { float qv = Float.parseFloat(value.getTokenValue()); acceptEncoding.setQValue(qv); } catch (NumberFormatException ex) { throw createParseException(ex.getMessage()); } catch (InvalidArgumentException ex) { throw createParseException(ex.getMessage()); } this.lexer.SPorHT(); } acceptEncodingList.add(acceptEncoding); if (lexer.lookAhead(0) == ',') { this.lexer.match(','); this.lexer.SPorHT(); } } } return acceptEncodingList; } finally { if (debug) dbg_leave("AcceptEncodingParser.parse"); } } } /* * $Log: AcceptEncodingParser.java,v $ * Revision 1.7 2009/07/17 18:57:56 emcho * Converts indentation tabs to spaces so that we have a uniform indentation policy in the whole project. * * 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. * */