001/* 002 * ==================================================================== 003 * Licensed to the Apache Software Foundation (ASF) under one 004 * or more contributor license agreements. See the NOTICE file 005 * distributed with this work for additional information 006 * regarding copyright ownership. The ASF licenses this file 007 * to you under the Apache License, Version 2.0 (the 008 * "License"); you may not use this file except in compliance 009 * with the License. You may obtain a copy of the License at 010 * 011 * http://www.apache.org/licenses/LICENSE-2.0 012 * 013 * Unless required by applicable law or agreed to in writing, 014 * software distributed under the License is distributed on an 015 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 016 * KIND, either express or implied. See the License for the 017 * specific language governing permissions and limitations 018 * under the License. 019 * ==================================================================== 020 * 021 * This software consists of voluntary contributions made by many 022 * individuals on behalf of the Apache Software Foundation. For more 023 * information on the Apache Software Foundation, please see 024 * <http://www.apache.org/>. 025 * 026 */ 027 028package org.apache.http.impl.cookie; 029 030import java.util.ArrayList; 031import java.util.BitSet; 032import java.util.List; 033 034import org.apache.http.HeaderElement; 035import org.apache.http.NameValuePair; 036import org.apache.http.ParseException; 037import org.apache.http.annotation.Contract; 038import org.apache.http.annotation.ThreadingBehavior; 039import org.apache.http.message.BasicHeaderElement; 040import org.apache.http.message.BasicNameValuePair; 041import org.apache.http.message.ParserCursor; 042import org.apache.http.message.TokenParser; 043import org.apache.http.util.Args; 044import org.apache.http.util.CharArrayBuffer; 045 046/** 047 * 048 * @since 4.0 049 */ 050@Contract(threading = ThreadingBehavior.IMMUTABLE) 051public class NetscapeDraftHeaderParser { 052 053 public final static NetscapeDraftHeaderParser DEFAULT = new NetscapeDraftHeaderParser(); 054 055 private final static char PARAM_DELIMITER = ';'; 056 057 // IMPORTANT! 058 // These private static variables must be treated as immutable and never exposed outside this class 059 private static final BitSet TOKEN_DELIMS = TokenParser.INIT_BITSET('=', PARAM_DELIMITER); 060 private static final BitSet VALUE_DELIMS = TokenParser.INIT_BITSET(PARAM_DELIMITER); 061 062 private final TokenParser tokenParser; 063 064 public NetscapeDraftHeaderParser() { 065 super(); 066 this.tokenParser = TokenParser.INSTANCE; 067 } 068 069 public HeaderElement parseHeader( 070 final CharArrayBuffer buffer, 071 final ParserCursor cursor) throws ParseException { 072 Args.notNull(buffer, "Char array buffer"); 073 Args.notNull(cursor, "Parser cursor"); 074 final NameValuePair nvp = parseNameValuePair(buffer, cursor); 075 final List<NameValuePair> params = new ArrayList<NameValuePair>(); 076 while (!cursor.atEnd()) { 077 final NameValuePair param = parseNameValuePair(buffer, cursor); 078 params.add(param); 079 } 080 return new BasicHeaderElement( 081 nvp.getName(), 082 nvp.getValue(), params.toArray(new NameValuePair[params.size()])); 083 } 084 085 private NameValuePair parseNameValuePair( 086 final CharArrayBuffer buffer, final ParserCursor cursor) { 087 final String name = tokenParser.parseToken(buffer, cursor, TOKEN_DELIMS); 088 if (cursor.atEnd()) { 089 return new BasicNameValuePair(name, null); 090 } 091 final int delim = buffer.charAt(cursor.getPos()); 092 cursor.updatePos(cursor.getPos() + 1); 093 if (delim != '=') { 094 return new BasicNameValuePair(name, null); 095 } 096 final String value = tokenParser.parseToken(buffer, cursor, VALUE_DELIMS); 097 if (!cursor.atEnd()) { 098 cursor.updatePos(cursor.getPos() + 1); 099 } 100 return new BasicNameValuePair(name, value); 101 } 102 103}