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 28 import gov.nist.javax.sip.header.*; 29 import java.util.*; 30 import java.text.ParseException; 31 32 /** 33 * Generic header parser class. The parsers for various headers extend this 34 * class. To create a parser for a new header, extend this class and change 35 * the createParser class. 36 * 37 * @version 1.2 $Revision: 1.9 $ $Date: 2009/07/17 18:58:00 $ 38 * 39 * @author M. Ranganathan <br/> 40 * 41 * 42 */ 43 public class HeaderParser extends Parser { 44 45 /** 46 * Parse the weekday field 47 * @return an integer with the calendar content for wkday. 48 */ 49 protected int wkday() throws ParseException { 50 dbg_enter("wkday"); 51 try { 52 String tok = lexer.ttoken(); 53 String id = tok.toLowerCase(); 54 55 if (TokenNames.MON.equalsIgnoreCase(id)) 56 return Calendar.MONDAY; 57 else if (TokenNames.TUE.equalsIgnoreCase(id)) 58 return Calendar.TUESDAY; 59 else if (TokenNames.WED.equalsIgnoreCase(id)) 60 return Calendar.WEDNESDAY; 61 else if (TokenNames.THU.equalsIgnoreCase(id)) 62 return Calendar.THURSDAY; 63 else if (TokenNames.FRI.equalsIgnoreCase(id)) 64 return Calendar.FRIDAY; 65 else if (TokenNames.SAT.equalsIgnoreCase(id)) 66 return Calendar.SATURDAY; 67 else if (TokenNames.SUN.equalsIgnoreCase(id)) 68 return Calendar.SUNDAY; 69 else 70 throw createParseException("bad wkday"); 71 } finally { 72 dbg_leave("wkday"); 73 } 74 75 } 76 77 /** 78 * parse and return a date field. 79 * @return a date structure with the parsed value. 80 */ 81 protected Calendar date() throws ParseException { 82 try { 83 Calendar retval = Calendar.getInstance(TimeZone.getTimeZone("GMT")); 84 String s1 = lexer.number(); 85 int day = Integer.parseInt(s1); 86 if (day <= 0 || day > 31) 87 throw createParseException("Bad day "); 88 retval.set(Calendar.DAY_OF_MONTH, day); 89 lexer.match(' '); 90 String month = lexer.ttoken().toLowerCase(); 91 if (month.equals("jan")) { 92 retval.set(Calendar.MONTH, Calendar.JANUARY); 93 } else if (month.equals("feb")) { 94 retval.set(Calendar.MONTH, Calendar.FEBRUARY); 95 } else if (month.equals("mar")) { 96 retval.set(Calendar.MONTH, Calendar.MARCH); 97 } else if (month.equals("apr")) { 98 retval.set(Calendar.MONTH, Calendar.APRIL); 99 } else if (month.equals("may")) { 100 retval.set(Calendar.MONTH, Calendar.MAY); 101 } else if (month.equals("jun")) { 102 retval.set(Calendar.MONTH, Calendar.JUNE); 103 } else if (month.equals("jul")) { 104 retval.set(Calendar.MONTH, Calendar.JULY); 105 } else if (month.equals("aug")) { 106 retval.set(Calendar.MONTH, Calendar.AUGUST); 107 } else if (month.equals("sep")) { 108 retval.set(Calendar.MONTH, Calendar.SEPTEMBER); 109 } else if (month.equals("oct")) { 110 retval.set(Calendar.MONTH, Calendar.OCTOBER); 111 } else if (month.equals("nov")) { 112 retval.set(Calendar.MONTH, Calendar.NOVEMBER); 113 } else if (month.equals("dec")) { 114 retval.set(Calendar.MONTH, Calendar.DECEMBER); 115 } 116 lexer.match(' '); 117 String s2 = lexer.number(); 118 int yr = Integer.parseInt(s2); 119 retval.set(Calendar.YEAR, yr); 120 return retval; 121 122 } catch (Exception ex) { 123 throw createParseException("bad date field"); 124 } 125 126 } 127 128 /** 129 * Set the time field. This has the format hour:minute:second 130 */ 131 protected void time(Calendar calendar) throws ParseException { 132 try { 133 String s = lexer.number(); 134 int hour = Integer.parseInt(s); 135 calendar.set(Calendar.HOUR_OF_DAY, hour); 136 lexer.match(':'); 137 s = lexer.number(); 138 int min = Integer.parseInt(s); 139 calendar.set(Calendar.MINUTE, min); 140 lexer.match(':'); 141 s = lexer.number(); 142 int sec = Integer.parseInt(s); 143 calendar.set(Calendar.SECOND, sec); 144 } catch (Exception ex) { 145 throw createParseException("error processing time "); 146 147 } 148 149 } 150 151 /** 152 * Creates new HeaderParser 153 * @param String to parse. 154 */ 155 protected HeaderParser(String header) { 156 this.lexer = new Lexer("command_keywordLexer", header); 157 } 158 159 protected HeaderParser(Lexer lexer) { 160 this.lexer = lexer; 161 this.lexer.selectLexer("command_keywordLexer"); 162 } 163 164 /** 165 * Parse the SIP header from the buffer and return a parsed 166 * structure. 167 * @throws ParseException if there was an error parsing. 168 */ 169 public SIPHeader parse() throws ParseException { 170 String name = lexer.getNextToken(':'); 171 lexer.consume(1); 172 String body = lexer.getLine().trim(); 173 // we dont set any fields because the header is 174 // ok 175 ExtensionHeaderImpl retval = new ExtensionHeaderImpl(name); 176 retval.setValue(body); 177 return retval; 178 179 } 180 181 /** 182 * Parse the header name until the colon and chew WS after that. 183 */ 184 protected void headerName(int tok) throws ParseException { 185 this.lexer.match(tok); 186 this.lexer.SPorHT(); 187 this.lexer.match(':'); 188 this.lexer.SPorHT(); 189 } 190 } 191
