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From "Januski, Ken" <>
Subject RE: RequestDispatcher.forward to cgi?
Date Fri, 05 Dec 2003 18:54:26 GMT
Thanks Tim,

I'll keep working on it then and see where it gets me.


-----Original Message-----
From: Tim Funk []
Sent: Friday, December 05, 2003 12:54 PM
To: Tomcat Users List
Subject: Re: RequestDispatcher.forward to cgi?

I would think that the CGI servlet would work on a forward but you must be 
sure that:
1) No input streams were open (or that they are compatible with the
2) On a POST, you do not call or look at request parameters or the input 
stream since it looks like the CGIServlet wants to pass the Inputstream
to the servlet.
3) I am unsure of how the CGI servlet goes to look for the exe with respect 
to a forward. (But I think you should be ok)


Januski, Ken wrote:

> Tim,
> Now that I look at them closely I see that most of them are due to a
> problem in my program. So it just logs over and over that it's forwarding
> the request. I'll investigate to see if the loop is due to an error in my
> progamming (certainly possible since I've had to tinker with a very large
> controller servlet in order to incorporate this cgi page) or due to a
> failure in forwarding.
> What I was hoping in asking the question though was to find out whether
> anyone had done this successfully or not. I'm happy to troubleshoot the
> problem if I think there's a chance of success. But I hate to spend the
> on it if I'm just trying to do the impossible or the dumb.
> Ken
> -----Original Message-----
> From: Tim Funk []
> Sent: Thursday, December 04, 2003 9:21 PM
> To: Tomcat Users List
> Subject: Re: RequestDispatcher.forward to cgi?
> Just curious ... what are the errors?
> -Tim
> Januski, Ken wrote:
>>I've finally managed to get cgi working in Tomcat. Now I need to forward
>>from a servlet to a cgi page. But both RequestDispatcher.forward and
>>RequestDispatcher.include are failing. I'm not surprised that include does
>>but I thought it might be possible with forward.
>>Since this is part of a large application that keeps track of the session
>>I'd like to be able to include the cgi page in the application. But I'm
>>beginning to think that's not possible. So I wonder if anyone knows
> whether
>>it's possible to forward to a cgi page within the same Tomcat webapp. If
> not
>>I'll save myself a lot of trouble and just make it a separate webapp with
>>just a cgi component.
>>Thanks for any advice.
>>P.S. I'm using cgi with perl because I can't find a class to add IPTC
>>information to a Jpg and I don't have time to write it myself. Such a
> module
>>does already exist in Perl.
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