Hi,
we are facing problems with cookies containing umplaut (or other special
characters), causing the request processing beeing stopped and returning a
blank page.
I know that umlaut characters are forbidden within cookies, except when they
are urlencoded, but the problem arises from third-parties createing cookies
with the correct domain but containing invalid characters. Due to the request
processing abort, we are unable to mark such cookies as invalid and beeing
dropped next time by the client.
Apr 13, 2013 9:19:41 AM org.apache.coyote.http11.AbstractHttp11Processor process
SEVERE: Error processing request
java.lang.IllegalArgumentException: Control character in cookie value or
attribute.
at
org.apache.tomcat.util.http.CookieSupport.isHttpSeparator(CookieSupport.java:193)
at
org.apache.tomcat.util.http.Cookies.getTokenEndPosition(Cookies.java:502)
at
org.apache.tomcat.util.http.Cookies.processCookieHeader(Cookies.java:349)
at org.apache.tomcat.util.http.Cookies.processCookies(Cookies.java:168)
at org.apache.tomcat.util.http.Cookies.getCookieCount(Cookies.java:106)
at
org.apache.catalina.connector.CoyoteAdapter.parseSessionCookiesId(CoyoteAdapter.java:931)
at
org.apache.catalina.connector.CoyoteAdapter.postParseRequest(CoyoteAdapter.java:688)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:402)
at
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
Is there a possibility to ignore such cookies? Setting
CookieSupport.ALLOW_HTTP_SEPARATORS_IN_V0=true does not help because in
org.apache.tomcat.util.http.Cookies.processCookieHeader first
org.apache.tomcat.util.http.CookieSupport.isHttpSeparator is called and only
than ALLOW_HTTP_SEPARATORS_IN_V0 examined:
// Skip whitespace and non-token characters (separators)
while (pos < end &&
(CookieSupport.isHttpSeparator((char) bytes[pos]) &&
!CookieSupport.ALLOW_HTTP_SEPARATORS_IN_V0 ||
CookieSupport.isV0Separator((char) bytes[pos]) ||
isWhiteSpace(bytes[pos])))
{pos++; }
Maybe changing the evaluation order within the while condition could solve the
problem.
Why is it better throwing an exception, causing the request processing beeing
aborted and returning a blank page, than ignoring the invalid cookie? In my
opinion this is a serious possibility to prevent site accessing by the client
through third-parties.
Pls help us/me out.
Thanks.
Laszlo
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