I wrote a WSGI application which I need to deploy to a server, however I've been given a server that already has mod_python installed.
I am not allowed to remove mod_python since there are some mod_python applications running on it already.
One option I considered was installing mod_wsgi alongside mod_python, however I went through sources and found that was a bad idea. Apparently mod_wsgi and mod_python don't mix well.
Another option I considered was installing mod_fastcgi and deploying it using fastcgi.
I would love to hear if someone has a better idea which doesn't break the current mod_python applications running on the server.
You can use mod_python and mod_wsgi together so long as same Python version and mod_python not linked against a static Python library.
Run the 'ldd' command on the mod_python.so file:
ldd mod_python.so
to find out if it links to libpythonX.Y.so. Build mod_wsgi to use same Python version, ensuring it is similarly linked against same libpythonX.Y.so.
UPDATE
Version 4.X of mod_wsgi now explicitly refuses to start if mod_python is also loaded. In order for mod_python and mod_wsgi to be used together, certain features of mod_wsgi had to be crippled. As mod_python is now very old, not meaningfully updated, has various problems with it and should not be used for anything new, no longer trying to support them being used together.
Here's an idea (that needs fleshing out, and that maybe won't work):
Here's what I would start with:
from mod_python import apache
from wsgiref.handlers import BaseHandler
class MyWSGIHandler(BaseHandler):
def __init__(self, apachereq):
BaseHandler.__init__(self)
self.apachereq = apachereq
def _write(self, data):
self.apachereq.write(data)
# override the other required methods of BaseHandler, see
# http://docs.python.org/library/wsgiref.html#wsgiref.handlers.BaseHandler
wsgi_app = create_your_wsgi_app()
def handler(req):
wsgi_handler = MyWSGIHandler(req)
wsgi_handler.run(wsgi_app)
return apache.OK
IDEA 2 (pretty hackish):
You could in your handler code also use the werkzeug wsgi testing module to pass a request to the WSGI app, get a werkzeug response back and then write that response to apache.
Something like:
from mod_python import apache
from werkzeug.test import Client
from werkzeug.wrappers import BaseResponse
wsgi_app = create_your_wsgi_app()
def handler(req):
c = Client(wsgi_app, BaseResponse)
resp = c.get(somehow_get_the_url_from(req)) # or c.post if it's a POST request
req.write(resp.data) # ... and find a way to write the headers as well
return apache.OK
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With