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Micro Distribution of the Payara Project for IBM JDK
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2011 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
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* enclosed by brackets [] replaced by your own identifying information:
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* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.enterprise.web.util;
/**
* Parse a Cookie: header into individual tokens according to RFC 2109.
*/
public class CookieTokenizer
{
/**
* Upper bound on the number of cookie tokens to accept. The limit is
* based on the 4 different attributes (4.3.4) and the 20 cookie minimum
* (6.3) given in RFC 2109 multiplied by 2 to accomodate the 2 tokens in
* each name=value pair ("JSESSIONID=1234" is 2 tokens).
*/
private static final int MAX_COOKIE_TOKENS = 4 * 20 * 2;
/**
* Array of cookie tokens. Even indices contain name tokens while odd
* indices contain value tokens (or null).
*/
private String tokens[] = new String[MAX_COOKIE_TOKENS];
/**
* Number of cookie tokens currently in the tokens[] array.
*/
private int numTokens = 0;
/**
* Parse a name=value pair from the Cookie: header.
*
* @param cookies The Cookie: header to parse
* @param beginIndex The index in cookies to begin parsing from, inclusive
*/
private int parseNameValue(String cookies, int beginIndex) {
int length = cookies.length();
int index = beginIndex;
while (index < length) {
switch (cookies.charAt(index)) {
case ';':
case ',':
// Found end of name token without value
tokens[numTokens] = cookies.substring(beginIndex, index).trim();
if (tokens[numTokens].length() > 0) {
numTokens++;
tokens[numTokens] = null;
numTokens++;
}
return index + 1;
case '=':
// Found end of name token with value
tokens[numTokens] = cookies.substring(beginIndex, index).trim();
numTokens++;
return parseValue(cookies, index + 1);
case '"':
// Skip past quoted span
do index++; while (cookies.charAt(index) != '"');
break;
default:
break;
}
index++;
}
if (index > beginIndex) {
// Found end of name token without value
tokens[numTokens] = cookies.substring(beginIndex, index).trim();
if (tokens[numTokens].length() > 0) {
numTokens++;
tokens[numTokens] = null;
numTokens++;
}
}
return index;
}
/**
* Parse the name=value tokens from a Cookie: header.
*
* @param cookies The Cookie: header to parse
*/
public int tokenize(String cookies) {
numTokens = 0;
if (cookies != null) {
try {
// Advance through cookies, parsing name=value pairs
int length = cookies.length();
int index = 0;
while (index < length)
index = parseNameValue(cookies, index);
}
catch (ArrayIndexOutOfBoundsException e) {
// Filled up the tokens[] array
}
catch (IndexOutOfBoundsException e) {
// Walked off the end of the cookies header
}
}
return numTokens;
}
/**
* Return the number of cookie tokens parsed from the Cookie: header.
*/
public int getNumTokens() {
return numTokens;
}
/**
* Returns a given cookie token from the Cookie: header.
*
* @param index The index of the cookie token to return
*/
public String tokenAt(int index) {
return tokens[index];
}
/**
* Parse the value token from a name=value pair.
*
* @param cookies The Cookie: header to parse
* @param beginIndex The index in cookies to begin parsing from, inclusive
*/
private int parseValue(String cookies, int beginIndex) {
int length = cookies.length();
int index = beginIndex;
while (index < length) {
switch (cookies.charAt(index)) {
case ';':
case ',':
// Found end of value token
tokens[numTokens] = cookies.substring(beginIndex, index).trim();
numTokens++;
return index + 1;
case '"':
// Skip past quoted span
do index++; while (cookies.charAt(index) != '"');
break;
default:
break;
}
index++;
}
// Found end of value token
tokens[numTokens] = cookies.substring(beginIndex, index).trim();
numTokens++;
return index;
}
}
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