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//
// ========================================================================
// Copyright (c) 1995-2012 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.server;
import java.util.Locale;
import javax.servlet.http.Cookie;
import org.eclipse.jetty.util.LazyList;
import org.eclipse.jetty.util.QuotedStringTokenizer;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
/* ------------------------------------------------------------ */
/** Cookie parser
* <p>Optimized stateful cookie parser. Cookies fields are added with the
* {@link #addCookieField(String)} method and parsed on the next subsequent
* call to {@link #getCookies()}.
* If the added fields are identical to those last added (as strings), then the
* cookies are not re parsed.
*
*
*/
public class CookieCutter
{
private static final Logger LOG = Log.getLogger(CookieCutter.class);
private Cookie[] _cookies;
private Cookie[] _lastCookies;
Object _lazyFields;
int _fields;
public CookieCutter()
{
}
public Cookie[] getCookies()
{
if (_cookies!=null)
return _cookies;
if (_lastCookies!=null &&
_lazyFields!=null &&
_fields==LazyList.size(_lazyFields))
_cookies=_lastCookies;
else
parseFields();
_lastCookies=_cookies;
return _cookies;
}
public void setCookies(Cookie[] cookies)
{
_cookies=cookies;
_lastCookies=null;
_lazyFields=null;
_fields=0;
}
public void reset()
{
_cookies=null;
_fields=0;
}
public void addCookieField(String f)
{
if (f==null)
return;
f=f.trim();
if (f.length()==0)
return;
if (LazyList.size(_lazyFields)>_fields)
{
if (f.equals(LazyList.get(_lazyFields,_fields)))
{
_fields++;
return;
}
while (LazyList.size(_lazyFields)>_fields)
_lazyFields=LazyList.remove(_lazyFields,_fields);
}
_cookies=null;
_lastCookies=null;
_lazyFields=LazyList.add(_lazyFields,_fields++,f);
}
protected void parseFields()
{
_lastCookies=null;
_cookies=null;
Object cookies = null;
int version = 0;
// delete excess fields
while (LazyList.size(_lazyFields)>_fields)
_lazyFields=LazyList.remove(_lazyFields,_fields);
// For each cookie field
for (int f=0;f<_fields;f++)
{
String hdr = LazyList.get(_lazyFields,f);
// Parse the header
String name = null;
String value = null;
Cookie cookie = null;
boolean invalue=false;
boolean quoted=false;
boolean escaped=false;
int tokenstart=-1;
int tokenend=-1;
for (int i = 0, length = hdr.length(), last=length-1; i < length; i++)
{
char c = hdr.charAt(i);
// Handle quoted values for name or value
if (quoted)
{
if (escaped)
{
escaped=false;
continue;
}
switch (c)
{
case '"':
tokenend=i;
quoted=false;
// handle quote as last character specially
if (i==last)
{
if (invalue)
value = hdr.substring(tokenstart, tokenend+1);
else
{
name = hdr.substring(tokenstart, tokenend+1);
value = "";
}
}
break;
case '\\':
escaped=true;
continue;
default:
continue;
}
}
else
{
// Handle name and value state machines
if (invalue)
{
// parse the value
switch (c)
{
case ' ':
case '\t':
continue;
case '"':
if (tokenstart<0)
{
quoted=true;
tokenstart=i;
}
tokenend=i;
if (i==last)
{
value = hdr.substring(tokenstart, tokenend+1);
break;
}
continue;
case ';':
// case ',':
if (tokenstart>=0)
value = hdr.substring(tokenstart, tokenend+1);
else
value="";
tokenstart = -1;
invalue=false;
break;
default:
if (tokenstart<0)
tokenstart=i;
tokenend=i;
if (i==last)
{
value = hdr.substring(tokenstart, tokenend+1);
break;
}
continue;
}
}
else
{
// parse the name
switch (c)
{
case ' ':
case '\t':
continue;
case '"':
if (tokenstart<0)
{
quoted=true;
tokenstart=i;
}
tokenend=i;
if (i==last)
{
name = hdr.substring(tokenstart, tokenend+1);
value = "";
break;
}
continue;
case ';':
// case ',':
if (tokenstart>=0)
{
name = hdr.substring(tokenstart, tokenend+1);
value = "";
}
tokenstart = -1;
break;
case '=':
if (tokenstart>=0)
name = hdr.substring(tokenstart, tokenend+1);
tokenstart = -1;
invalue=true;
continue;
default:
if (tokenstart<0)
tokenstart=i;
tokenend=i;
if (i==last)
{
name = hdr.substring(tokenstart, tokenend+1);
value = "";
break;
}
continue;
}
}
}
// If after processing the current character we have a value and a name, then it is a cookie
if (value!=null && name!=null)
{
// TODO handle unquoting during parsing! But quoting is uncommon
name=QuotedStringTokenizer.unquote(name);
value=QuotedStringTokenizer.unquote(value);
try
{
if (name.startsWith("$"))
{
String lowercaseName = name.toLowerCase(Locale.ENGLISH);
if ("$path".equals(lowercaseName))
{
if (cookie!=null)
cookie.setPath(value);
}
else if ("$domain".equals(lowercaseName))
{
if (cookie!=null)
cookie.setDomain(value);
}
else if ("$port".equals(lowercaseName))
{
if (cookie!=null)
cookie.setComment("$port="+value);
}
else if ("$version".equals(lowercaseName))
{
version = Integer.parseInt(value);
}
}
else
{
cookie = new Cookie(name, value);
if (version > 0)
cookie.setVersion(version);
cookies = LazyList.add(cookies, cookie);
}
}
catch (Exception e)
{
LOG.debug(e);
}
name = null;
value = null;
}
}
}
_cookies = (Cookie[]) LazyList.toArray(cookies,Cookie.class);
_lastCookies=_cookies;
}
}
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