https://bz.apache.org/bugzilla/show_bug.cgi?id=58836
Bug ID: 58836
Summary: Query string parameters w/o values are not sent to
dest servlet via
request.getRequestDispatcher().forward()
Product: Tomcat 8
Version: 8.0.28
Hardware: PC
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
Assignee: dev@tomcat.apache.org
Reporter: safepassi...@gmail.com
URL / query string parameters with no value (technically keyless values) are
not received by the destination servlet when using
request.getRequestDispatcher().forward().
Example:
request.getRequestDispatcher("/newpage?P1=1&P2").forward(request,response);
The servlet handling /newpage will have P1 in the request parameter list but
not P2 even though both parameters are in the query string verified with
request.getQueryString(). The order and quantity of parameters doesn't seem to
make a difference, those without values are not seen by the servlet, while
those with values (or even with just an = but no value) are.
I believe the cause may be in ApplicationHttpRequest.mergeParameters().
Possibly the line "if (value == null)" should be replaced with if
(queryParameters.containsKey(key)) (among other things), but I'm not 100% on
that, building and debugging Tomcat is beyond my capabilities at this point.
I have a pair of test servlets that show this behavior on my development server
if somebody wants to see it in action. Email me safepassing2/gmail_com and
I'll provide the address.
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