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CookieCutter
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LOG: Logger
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_complianceMode: CookieCompliance
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_complianceListener: Listener
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CookieCutter(CookieCompliance, Listener): void
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parseFields(List<String>): void
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reportComplianceViolation(Violation, String): void
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addCookie(String, String, String, String, int, String): void
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isRFC6265RejectedCharacter(boolean, char): boolean
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https://eclipse.org/jetty/jetty-http: The Eclipse Jetty Project
(Webtide)
- Greg Wilkins (Webtide, LLC)
- Jan Bartel (Webtide, LLC)
- Jesse McConnell (Webtide, LLC)
- Joakim Erdfelt (Webtide, LLC)
- Simone Bordet (Webtide, LLC)
- David Jencks (IBM)
- Olivier Lamy (Webtide, LLC)
- Ludovic Orban (Webtide, LLC)
//
// ========================================================================
// Copyright (c) 1995-2020 Mort Bay Consulting Pty Ltd and others.
//
// This program and the accompanying materials are made available under
// the terms of the Eclipse Public License 2.0 which is available at
// https://www.eclipse.org/legal/epl-2.0
//
// This Source Code may also be made available under the following
// Secondary Licenses when the conditions for such availability set
// forth in the Eclipse Public License, v. 2.0 are satisfied:
// the Apache License v2.0 which is available at
// https://www.apache.org/licenses/LICENSE-2.0
//
// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
// ========================================================================
//
package org.eclipse.jetty.http;
import java.util.List;
import java.util.Locale;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static org.eclipse.jetty.http.CookieCompliance.Violation.COMMA_NOT_VALID_OCTET;
import static org.eclipse.jetty.http.CookieCompliance.Violation.RESERVED_NAMES_NOT_DOLLAR_PREFIXED;
Cookie parser
/**
* Cookie parser
*/
public abstract class CookieCutter
{
protected static final Logger LOG = LoggerFactory.getLogger(CookieCutter.class);
protected final CookieCompliance _complianceMode;
private final ComplianceViolation.Listener _complianceListener;
protected CookieCutter(CookieCompliance compliance, ComplianceViolation.Listener complianceListener)
{
_complianceMode = compliance;
_complianceListener = complianceListener;
}
protected void parseFields(List<String> rawFields)
{
StringBuilder unquoted = null;
// For each cookie field
for (String hdr : rawFields)
{
// Parse the header
String name = null;
String cookieName = null;
String cookieValue = null;
String cookiePath = null;
String cookieDomain = null;
String cookieComment = null;
int cookieVersion = 0;
boolean invalue = false;
boolean inQuoted = false;
boolean quoted = false;
boolean escaped = false;
boolean reject = false;
int tokenstart = -1;
int tokenend = -1;
for (int i = 0, length = hdr.length(); i <= length; i++)
{
char c = i == length ? 0 : hdr.charAt(i);
// Handle quoted values for value
if (inQuoted)
{
if (escaped)
{
escaped = false;
if (c > 0)
unquoted.append(c);
else
{
unquoted.setLength(0);
inQuoted = false;
i--;
}
continue;
}
switch (c)
{
case '"':
inQuoted = false;
quoted = true;
tokenstart = i;
tokenend = -1;
break;
case '\\':
escaped = true;
continue;
case 0:
// unterminated quote, let's ignore quotes
unquoted.setLength(0);
inQuoted = false;
i--;
continue;
default:
unquoted.append(c);
continue;
}
}
else
{
// Handle name and value state machines
if (invalue)
{
// parse the cookie-value
switch (c)
{
case ' ':
case '\t':
break;
case ',':
if (COMMA_NOT_VALID_OCTET.isAllowedBy(_complianceMode))
reportComplianceViolation(COMMA_NOT_VALID_OCTET, "Cookie " + cookieName);
else
{
if (quoted)
{
// must have been a bad internal quote. let's fix as best we can
unquoted.append(hdr, tokenstart, i--);
inQuoted = true;
quoted = false;
continue;
}
if (tokenstart < 0)
tokenstart = i;
tokenend = i;
continue;
}
// fall through
case 0:
case ';':
{
String value;
if (quoted)
{
value = unquoted.toString();
unquoted.setLength(0);
quoted = false;
}
else if (tokenstart >= 0)
value = tokenend >= tokenstart ? hdr.substring(tokenstart, tokenend + 1) : hdr.substring(tokenstart);
else
value = "";
try
{
if (name.startsWith("$"))
{
if (RESERVED_NAMES_NOT_DOLLAR_PREFIXED.isAllowedBy(_complianceMode))
{
reportComplianceViolation(RESERVED_NAMES_NOT_DOLLAR_PREFIXED, "Cookie " + cookieName + " field " + name);
String lowercaseName = name.toLowerCase(Locale.ENGLISH);
switch (lowercaseName)
{
case "$path":
cookiePath = value;
break;
case "$domain":
cookieDomain = value;
break;
case "$port":
cookieComment = "$port=" + value;
break;
case "$version":
cookieVersion = Integer.parseInt(value);
break;
default:
break;
}
}
}
else
{
// This is a new cookie, so add the completed last cookie if we have one
if (cookieName != null)
{
if (!reject)
{
addCookie(cookieName, cookieValue, cookieDomain, cookiePath, cookieVersion, cookieComment);
reject = false;
}
cookieDomain = null;
cookiePath = null;
cookieComment = null;
}
cookieName = name;
cookieValue = value;
}
}
catch (Exception e)
{
LOG.debug("Unable to process Cookie", e);
}
name = null;
tokenstart = -1;
invalue = false;
break;
}
case '"':
if (tokenstart < 0)
{
tokenstart = i;
inQuoted = true;
if (unquoted == null)
unquoted = new StringBuilder();
break;
}
// fall through to default case
default:
if (quoted)
{
// must have been a bad internal quote. let's fix as best we can
unquoted.append(hdr, tokenstart, i--);
inQuoted = true;
quoted = false;
continue;
}
if (_complianceMode == CookieCompliance.RFC6265)
{
if (isRFC6265RejectedCharacter(inQuoted, c))
{
reject = true;
}
}
if (tokenstart < 0)
tokenstart = i;
tokenend = i;
continue;
}
}
else
{
// parse the cookie-name
switch (c)
{
case 0:
case ' ':
case '\t':
continue;
case '"':
// Quoted name is not allowed in any version of the Cookie spec
reject = true;
break;
case ';':
// a cookie terminated with no '=' sign.
tokenstart = -1;
invalue = false;
reject = false;
continue;
case '=':
if (quoted)
{
name = unquoted.toString();
unquoted.setLength(0);
quoted = false;
}
else if (tokenstart >= 0)
name = tokenend >= tokenstart ? hdr.substring(tokenstart, tokenend + 1) : hdr.substring(tokenstart);
tokenstart = -1;
invalue = true;
break;
default:
if (quoted)
{
// must have been a bad internal quote. let's fix as best we can
unquoted.append(hdr, tokenstart, i--);
inQuoted = true;
quoted = false;
continue;
}
if (_complianceMode == CookieCompliance.RFC6265)
{
if (isRFC6265RejectedCharacter(inQuoted, c))
{
reject = true;
}
}
if (tokenstart < 0)
tokenstart = i;
tokenend = i;
continue;
}
}
}
}
if (cookieName != null && !reject)
addCookie(cookieName, cookieValue, cookieDomain, cookiePath, cookieVersion, cookieComment);
}
}
protected void reportComplianceViolation(CookieCompliance.Violation violation, String reason)
{
if (_complianceListener != null)
{
_complianceListener.onComplianceViolation(_complianceMode, violation, reason);
}
}
protected abstract void addCookie(String cookieName, String cookieValue, String cookieDomain, String cookiePath, int cookieVersion, String cookieComment);
protected boolean isRFC6265RejectedCharacter(boolean inQuoted, char c)
{
if (inQuoted)
{
// We only reject if a Control Character is encountered
if (Character.isISOControl(c))
{
return true;
}
}
else
{
/* From RFC6265 - Section 4.1.1 - Syntax
* cookie-octet = %x21 / %x23-2B / %x2D-3A / %x3C-5B / %x5D-7E
* ; US-ASCII characters excluding CTLs,
* ; whitespace DQUOTE, comma, semicolon,
* ; and backslash
*/
return Character.isISOControl(c) || // control characters
c > 127 || // 8-bit characters
c == ',' || // comma
c == ';'; // semicolon
}
return false;
}
}