Intercepting request parameters in JSP.

[Amit Shanker]

Hi All,

I need to modify/scan the request parameters and set them to different values. I've heard that it is possible through filters. Can it be achieved in iPlanet 6.5 application server and are there any known problems, say of performance in using the filter class?

Is there a simpler solution by which deployment can be avoided? Because for implementing filters the web.xml file will require changes and will call for redeployment.

Awaiting responses.

Cheers,
Amit.

[Lasse Koskela]

Originally posted by Amit Shanker:
I need to modify/scan the request parameters and set them to different values. I've heard that it is possible through filters. Can it be achieved in iPlanet 6.5 application server and are there any known problems, say of performance in using the filter class?

It can be achieved with iPlanet 6.5 if iPlanet 6.5 supports the Java Servlet 2.3 specification (filters were introduced in 2.3, if I remember correctly).
Regarding performance, it shouldn't be a problem if you're not doing anything "big" inside the filter. If you're worried about performance, you should test it yourself and see how it affects your particular architecture and application profile.

Originally posted by Amit Shanker:
Is there a simpler solution by which deployment can be avoided? Because for implementing filters the web.xml file will require changes and will call for redeployment.

If you want to avoid redeployment of the application, the only other option is to intercept the raw network packets between the client and the web server. It is waaaaay better to just redeploy the application.

[Dirk Schreckmann]

Moving this to the Servlets forum...