PI81569: INTRODUCE SWITCH FOR GETQUERYSTRING() TO RETURN ORIGINAL QUERY STRING IN FORWARDED SERVLET

Fixes are available

APAR status

Closed as program error.

Error description

WAS behaviour is compliance with servlet specification out of
the box. This switch is facilitate migration of applications
from few other application server that behaves differently.

Local fix

request.getAttribute("javax.servlet.forward,query_string") will
return  same response

Problem summary

****************************************************************
* USERS AFFECTED:  IBM WebSphere Application Server            *
*                  Traditional versions 8.5.5 and 9.0, and     *
*                  Websphere Application Server Liberty users  *
*                  of WebContainer.                            *
****************************************************************
* PROBLEM DESCRIPTION: Invoking                                *
*                      javax.servlet.HttpServletRequest.getQue *
*                      ryString() returns null after           *
*                      dispatching forward.                    *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
If the path used when invoking
javax.servlet.ServletRequest.getRequestDispatcher() does not
contain a query string, HttpServletRequest.getQueryString()
returns null even if the original request URI contained a
query string.
The following is an example of this scenario:
A request submitted to "/ServletA?a=b" gets matched to
ServletA:
ServletA:
...
request.getRequestDispatcher("/ServletB").forward();
...
ServletB:
...
String qs = request.getQueryString();
...
The "qs" variable in ServletB will have a null value. This is
correct according to the Servlet Specification. However, some
pre-existing applications might expect a different behavior
which might cause issues during migration.

Problem conclusion

The WebContainer has been modified to return the original
query string when invoking HttpServletRequest.getQueryString()
after dispatching if the path used to obtain the dispatcher
does not contain a query string.

A new WebContainer custom property needs to be set to true to
enable this behavior.

Name: com.ibm.ws.webcontainer.useOriginalQSInForwardIfNull
values: true/false(default)

After enabling the fix the "qs" variable in the example above
will have the following value:

"a=b"

If the path used when invoking
ServletRequest.getRequestDispatcher() contains a query string
and this fix is enabled the "qs" variable will contain the new
query string from the path used to obtain the dispatcher.


Please refer to the following technote for instructions on
enabling WebContainer custom properties:


Full profile:
http://www.ibm.com/support/docview.wss?rss=180&uid=swg21284395

Liberty profile:
http://www-01.ibm.com/support/docview.wss?uid=swg2159775


The fix for this APAR is currently targeted for inclusion in
fixpacks 8.5.5.13, 9.0.0.5 and 17.0.0.3. Please refer to the
recommended updates page for delivery information:

http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Temporary fix

Comments

APAR Information

APAR number
PI81569
Reported component name
WEBSPHERE APP S
Reported component ID
5724J0800
Reported release
850
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-05-12
Closed date
2017-09-18
Last modified date
2017-09-18

APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name
WEBSPHERE APP S
Fixed component ID
5724J0800

Applicable component levels

R850 PSY
UP
R900 PSY
UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.5","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
03 May 2022

Tips

PI81569: INTRODUCE SWITCH FOR GETQUERYSTRING() TO RETURN ORIGINAL QUERY STRING IN FORWARDED SERVLET

Fixes are available

Subscribe

APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name

Fixed component ID

Applicable component levels

R850 PSY

R900 PSY

Document Information

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