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Posts Tagged ‘python

My mod_python 101

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After having built mod_python.so and doing a LoadModule modules/mod_python.so I expected everything to work fine, assuming I did a SetHandler python-program and a PythonHandler helloworld within an Apache virtualhost.

I could get Hello World! on the page then, with this following snippet:

$cat helloworld.py
from mod_python import apache
def handler(req):
req.content_type = “text/plain”
req.write(”Hello World!”)
return apache.OK

That’s when the problems began.

1. I couldn’t put in another .py file in the same directory that could run successfully – 404 returned
2. All HTML files returned a 404 as well
3. There was nothing on the error logs

After much reading around, here’s the final configuration that worked:

--snip--
LoadModule modules/mod_python.so
--snip--
PythonDebug On
AddHandler python-program .py
PythonHandler mod_python.publisher
PythonPath "['/appl/python2.5/lib/','/appl/webdocs/','/appl/python2.5/bin/python/','/appl/python2.5/lib/python2.5/site-packages/mod_python/','/appl/python2.5/lib/python2.5/site-packages/'] + sys.path"
--snip--

And the URL that worked was http://myhost/helloworld.py/handler

Apparently, mod_python (also) has three kinds of default handlers – cgi, publisher and PSP.

cgihandler – to work with existing CGI scripts by creating a false environment
psp – Python Server Pages, just like JSP
publisher – The preferred way to handle python pages, using page/method

publisher is recommended for newer applications, and as you move forward and your application increases in complexity and entry points, you can make your own handlers.

Like I said, 101 and basics, but what the heck, I get to write something here. Itchy fingers.

More later.

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Written by mohitsuley

July 31, 2008 at 1:28 am

Posted in code, linux

Tagged with ,