From: Hugo C. <hug...@ya...> - 2007-08-01 15:08:47
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I use two independent debugging techniques when developing webmin/apache modules: 1. The first one is a kind of logging, complementary to what webmin already does. Webmin logs to a single file for all requests, I log to a set of rotating files, each file contains a information of the execution of cgi script. The implementation of this can be found in the sesa scripts, a small application framework on top of webmin (available on sourceforge.net/projects/sesa, the specific files that implement the feature are Sems.pm and Persistency.pm). The advantage of these log files is that they don't fill your disk (they are rotating), and give you a good history of what a user has done in the recent past. The disadvantage is obviously performance. 2. From CPAN, there is a module Devel::ptkdb that allows to do source code debugging, also for cgi scripts running on a remote server. To do this, you set the DISPLAY variable to your display (where your browser is runnning), in a very first _BEGIN_ block in your cgi script. Then, second, you use the interpreter sequence '#!/usr/bin/perl -d:ptkdb' to call the debugger. Then, make a request to the server, such that it executes your cgi script. Perhaps small changes are required to the webmin configuration, I am not entirely sure about it (e.g. to fork cgi scripts ?). I have used this technique a lot for debugging complicated cgi scripts. Hugo Paul Gear <pa...@ge...> wrote: Hi folks, I've made a few useful (i think) changes to the Shorewall module, and i plan to make a few more before i send in the patches. However, i would like to do some more testing & debugging, and i'd like to know what sort of debugging tools are at my disposal. >From what i can tell, the Perl errors from my module actually go nowhere at all. Is this correct/intended? What is the preferred mechanism to capture Perl errors and produce debug output? I've experimented with saving temporary files using a technique i borrowed from another module, and that seems to work sometimes, but not always (and possibly is dependent upon the actual path used). I'm confused! :-( Thanks in advance, Paul -- Did you know? It is illegal to use your copy of Microsoft Office on multiple computers without multiple licenses. Why not try the free alternative OpenOffice.org? ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/- Forwarded by the Webmin development list at web...@we... To remove yourself from this list, go to http://lists.sourceforge.net/lists/listinfo/webadmin-devel --------------------------------- Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos & more. |