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org.eclipse.jetty.http.RFC6265CookieParser Maven / Gradle / Ivy
//
// ========================================================================
// Copyright (c) 1995 Mort Bay Consulting Pty Ltd and others.
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License v. 2.0 which is available at
// https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
// 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.Locale;
import org.eclipse.jetty.util.StringUtil;
import static org.eclipse.jetty.http.CookieCompliance.Violation.ATTRIBUTES;
import static org.eclipse.jetty.http.CookieCompliance.Violation.ATTRIBUTE_VALUES;
import static org.eclipse.jetty.http.CookieCompliance.Violation.COMMA_NOT_VALID_OCTET;
import static org.eclipse.jetty.http.CookieCompliance.Violation.COMMA_SEPARATOR;
import static org.eclipse.jetty.http.CookieCompliance.Violation.ESCAPE_IN_QUOTES;
import static org.eclipse.jetty.http.CookieCompliance.Violation.INVALID_COOKIES;
import static org.eclipse.jetty.http.CookieCompliance.Violation.OPTIONAL_WHITE_SPACE;
import static org.eclipse.jetty.http.CookieCompliance.Violation.SPACE_IN_VALUES;
import static org.eclipse.jetty.http.CookieCompliance.Violation.SPECIAL_CHARS_IN_QUOTES;
/**
* Cookie parser
*/
public class RFC6265CookieParser implements CookieParser
{
private final CookieParser.Handler _handler;
private final CookieCompliance _complianceMode;
private final ComplianceViolation.Listener _complianceListener;
protected RFC6265CookieParser(CookieParser.Handler handler, CookieCompliance compliance, ComplianceViolation.Listener complianceListener)
{
_handler = handler;
_complianceMode = compliance;
_complianceListener = complianceListener;
}
private enum State
{
START,
IN_NAME,
AFTER_NAME,
VALUE,
IN_VALUE,
SPACE_IN_VALUE,
IN_QUOTED_VALUE,
ESCAPED_VALUE,
AFTER_QUOTED_VALUE,
END,
INVALID_COOKIE
}
@Override
public void parseField(String field)
{
State state = State.START;
String attributeName = null;
String value = null;
String cookieName = null;
String cookieValue = null;
String cookiePath = null;
String cookieDomain = null;
String cookieComment = null;
int cookieVersion = 0;
boolean cookieInvalid = false;
int spaces = 0;
int length = field.length();
StringBuilder string = new StringBuilder();
for (int i = 0; i <= length; i++)
{
char c = i == length ? ';' : field.charAt(i);
HttpTokens.Token token = HttpTokens.getToken(c);
if (token == null)
{
if (!_complianceMode.allows(INVALID_COOKIES))
throw new InvalidCookieException("Invalid Cookie character");
state = State.INVALID_COOKIE;
continue;
}
switch (state)
{
case START:
if (c == ' ' || c == '\t' || c == ';')
continue;
string.setLength(0);
if (token.isRfc2616Token())
{
if (!StringUtil.isBlank(cookieName) && !(c == '$' && (_complianceMode.allows(ATTRIBUTES) || _complianceMode.allows(ATTRIBUTE_VALUES))))
{
_handler.addCookie(cookieName, cookieValue, cookieVersion, cookieDomain, cookiePath, cookieComment);
cookieName = null;
cookieValue = null;
cookieDomain = null;
cookiePath = null;
cookieComment = null;
}
string.append(c);
state = State.IN_NAME;
}
else if (_complianceMode.allows(INVALID_COOKIES))
{
reportComplianceViolation(INVALID_COOKIES, field);
state = State.INVALID_COOKIE;
}
else
{
throw new InvalidCookieException("Bad Cookie name");
}
break;
case IN_NAME:
if (c == '=')
{
if (string.charAt(0) == '$')
attributeName = string.toString();
else
cookieName = string.toString();
state = State.VALUE;
continue;
}
if ((c == ' ' || c == '\t') && _complianceMode.allows(OPTIONAL_WHITE_SPACE))
{
reportComplianceViolation(OPTIONAL_WHITE_SPACE, field);
if (string.charAt(0) == '$')
attributeName = string.toString();
else
cookieName = string.toString();
state = State.AFTER_NAME;
continue;
}
if (token.isRfc2616Token())
{
string.append(c);
}
else if (_complianceMode.allows(INVALID_COOKIES))
{
reportComplianceViolation(INVALID_COOKIES, field);
state = c == ';' ? State.START : State.INVALID_COOKIE;
}
else
{
throw new InvalidCookieException("Bad Cookie name");
}
break;
case AFTER_NAME:
if (c == '=')
{
state = State.VALUE;
continue;
}
if (c == ';' || c == ',')
{
state = State.START;
continue;
}
if (_complianceMode.allows(INVALID_COOKIES))
{
reportComplianceViolation(INVALID_COOKIES, field);
state = State.INVALID_COOKIE;
}
else
{
throw new InvalidCookieException("Bad Cookie");
}
break;
case VALUE:
if (c == ' ' && _complianceMode.allows(OPTIONAL_WHITE_SPACE))
{
reportComplianceViolation(OPTIONAL_WHITE_SPACE, field);
continue;
}
string.setLength(0);
if (c == '"')
{
state = State.IN_QUOTED_VALUE;
}
else if (c == ';')
{
value = "";
i--;
state = State.END;
}
else if (token.isRfc6265CookieOctet())
{
string.append(c);
state = State.IN_VALUE;
}
else if (_complianceMode.allows(INVALID_COOKIES))
{
reportComplianceViolation(INVALID_COOKIES, field);
state = State.INVALID_COOKIE;
}
else
{
throw new InvalidCookieException("Bad Cookie value");
}
break;
case IN_VALUE:
if (c == ' ' && _complianceMode.allows(SPACE_IN_VALUES))
{
reportComplianceViolation(SPACE_IN_VALUES, field);
spaces = 1;
state = State.SPACE_IN_VALUE;
}
else if (c == ' ' || c == ';' || c == ',' || c == '\t')
{
value = string.toString();
i--;
state = State.END;
}
else if (token.isRfc6265CookieOctet())
{
string.append(c);
}
else if (_complianceMode.allows(INVALID_COOKIES))
{
reportComplianceViolation(INVALID_COOKIES, field);
state = State.INVALID_COOKIE;
}
else
{
throw new InvalidCookieException("Bad Cookie value");
}
break;
case SPACE_IN_VALUE:
if (c == ' ')
{
spaces++;
}
else if (c == ';' || c == ',' || c == '\t')
{
value = string.toString();
i--;
state = State.END;
}
else if (token.isRfc6265CookieOctet())
{
string.append(" ".repeat(spaces)).append(c);
state = State.IN_VALUE;
}
else if (_complianceMode.allows(INVALID_COOKIES))
{
reportComplianceViolation(INVALID_COOKIES, field);
state = State.INVALID_COOKIE;
}
else
{
throw new InvalidCookieException("Bad Cookie value");
}
break;
case IN_QUOTED_VALUE:
if (c == '"')
{
value = string.toString();
state = State.AFTER_QUOTED_VALUE;
}
else if (c == '\\' && _complianceMode.allows(ESCAPE_IN_QUOTES))
{
state = State.ESCAPED_VALUE;
}
else if (token.isRfc6265CookieOctet())
{
string.append(c);
}
else if (_complianceMode.allows(SPECIAL_CHARS_IN_QUOTES))
{
reportComplianceViolation(SPECIAL_CHARS_IN_QUOTES, field);
string.append(c);
}
else if (c == ',' && _complianceMode.allows(COMMA_NOT_VALID_OCTET))
{
reportComplianceViolation(COMMA_NOT_VALID_OCTET, field);
string.append(c);
}
else if (c == ' ' && _complianceMode.allows(SPACE_IN_VALUES))
{
reportComplianceViolation(SPACE_IN_VALUES, field);
string.append(c);
}
else if (_complianceMode.allows(INVALID_COOKIES))
{
string.append(c);
if (!cookieInvalid)
{
cookieInvalid = true;
reportComplianceViolation(INVALID_COOKIES, field);
}
// Try to find the closing double quote by staying in the current state.
}
else
{
throw new InvalidCookieException("Bad Cookie quoted value");
}
break;
case ESCAPED_VALUE:
string.append(c);
state = State.IN_QUOTED_VALUE;
break;
case AFTER_QUOTED_VALUE:
if (c == ';' || c == ',' || c == ' ' || c == '\t')
{
i--;
state = cookieInvalid ? State.INVALID_COOKIE : State.END;
}
else if (_complianceMode.allows(INVALID_COOKIES))
{
reportComplianceViolation(INVALID_COOKIES, field);
state = State.INVALID_COOKIE;
}
else
{
throw new InvalidCookieException("Bad Cookie quoted value");
}
break;
case END:
if (c == ';')
{
state = State.START;
}
else if (c == ',')
{
if (_complianceMode.allows(COMMA_SEPARATOR))
{
reportComplianceViolation(COMMA_SEPARATOR, field);
state = State.START;
}
else if (_complianceMode.allows(INVALID_COOKIES))
{
reportComplianceViolation(INVALID_COOKIES, field);
state = State.INVALID_COOKIE;
continue;
}
else
{
throw new InvalidCookieException("Comma cookie separator");
}
}
else if ((c == ' ' || c == '\t') && _complianceMode.allows(OPTIONAL_WHITE_SPACE))
{
reportComplianceViolation(OPTIONAL_WHITE_SPACE, field);
continue;
}
if (StringUtil.isBlank(attributeName))
{
cookieValue = value;
}
else
{
// We have an attribute.
if (_complianceMode.allows(ATTRIBUTE_VALUES))
{
reportComplianceViolation(ATTRIBUTES, field);
switch (attributeName.toLowerCase(Locale.ENGLISH))
{
case "$path":
cookiePath = value;
break;
case "$domain":
cookieDomain = value;
break;
case "$port":
cookieComment = "$port=" + value;
break;
case "$version":
cookieVersion = Integer.parseInt(value);
break;
default:
if (!_complianceMode.allows(INVALID_COOKIES))
throw new IllegalArgumentException("Invalid Cookie attribute");
reportComplianceViolation(INVALID_COOKIES, field);
state = State.INVALID_COOKIE;
break;
}
}
else if (_complianceMode.allows(ATTRIBUTES))
{
reportComplianceViolation(ATTRIBUTES, field);
}
else
{
cookieName = attributeName;
cookieValue = value;
}
attributeName = null;
}
value = null;
if (state == State.END)
throw new InvalidCookieException("Invalid cookie");
break;
case INVALID_COOKIE:
attributeName = null;
value = null;
cookieName = null;
cookieValue = null;
cookiePath = null;
cookieDomain = null;
cookieComment = null;
cookieInvalid = false;
if (c == ';')
state = State.START;
break;
}
}
if (!cookieInvalid && !StringUtil.isBlank(cookieName))
_handler.addCookie(cookieName, cookieValue, cookieVersion, cookieDomain, cookiePath, cookieComment);
}
protected void reportComplianceViolation(CookieCompliance.Violation violation, String reason)
{
if (_complianceListener != null)
_complianceListener.onComplianceViolation(new ComplianceViolation.Event(_complianceMode, violation, reason));
}
}
