We have some error with mod_wsgi but can't solve.

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Tin Tun Naing

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Nov 3, 2021, 12:52:11 AM11/3/21
to modwsgi
We installed python version 3.6 and apache 2.4 on CentOS 8 and connect with postgresql. 
And then installed mod_wsgi for run python code.
After we make some configuration in /etc/httpd/conf.d/wsgi.conf  as follows -

--------------------------------------------------------------------------------
LoadModule wsgi_module /etc/httpd/modules/mod_wsgi_python3.so
Alias /map /var/www/map/

<Directory /var/www/orikomap/>
Options ExecCGI MultiViews Indexes
MultiViewsMatch Handlers

AddHandler wsgi-script .py
AddHandler wsgi-script .wsgi
DirectoryIndex index.html index.php index.py app.wsgi

Order allow,deny
Allow from all
</Directory>
----------------------------------------------------------------------------------------

And then we add python code to target directory -> /var/www/map/index.py as follow

-------------------------------------------------------------------------------------------
import sys

def application(environ, start_response):
status = '200 OK'
output = u'mod_wsgi.process_group = %s' % repr(environ['mod_wsgi.process_group'])
response_headers = [('Content-type', 'text/plain'),
('Content-Length', str(len(output)))]
start_response(status, response_headers)

return [output.encode('UTF-8')]
----------------------------------------------------------------------------------------

we got follow result -

After we add a new python file on the same directory -> /var/www/map/map.py .


but we can't call another python file as follow.
http//:ipaddress/polygon.py

----------------------------------------------------------------------------------------------
[Fri Oct 29 03:56:35.064042 2021] [wsgi:error] [pid 2840:tid 140610811930368] [client 192.168.1.8:53246] mod_wsgi (pid=2840): Target WSGI script '/var/www/map/polygon.py' does not contain WSGI application 'application'.


So how can we solve this problem, how to run other Python files on the same directory using wsgi.

Thank you.


Graham Dumpleton

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Nov 3, 2021, 12:56:28 AM11/3/21
to mod...@googlegroups.com
Every file would need to have a WSGI application entry point called "application". The error says you don't have one in that file.

Overall this sort of approach of using AddHandler with separate WSGI files in a directory to handle different routes is generally regarded as bad practice these days. Instead of this approach you are much better off using a WSGI framework. A lightweight example of a WSGI framework is Flask. I strongly recommend you go look at Flask and how it works rather than pursuing your current path.


Graham

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