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Environment: Ubuntu 16, Apache 2.4

The last three times I tried to setup Apache to serve up Python I run into the same problem: Apache wants to let me download the script instead of running it and serving the html in the browser. Each time I figure it out, it turns out to be a combination of things I can never quite figure out.

For Simplicity:

I have the following shebang at the top of my file: #!/usr/bin/env python2.7

Ran sudo apt-get install libapache2-mod-python

Running a2enmod python returns Module python already enabled

Added all sorts of apache2.conf directives, none of them work:

<Directory /var/www/html>
     Options Indexes FollowSymLinks
     Options ExecCGI
     AllowOverride None
     Order allow,deny
     Allow from all
     AddHandler cgi-script .cgi
</Directory>

According to this link, this is all that should be required:

<Directory /srv/www/yoursite/public_html>
     Options +ExecCGI
     AddHandler cgi-script .py
</Directory>

And, this one works on another machine but not the present:

<Directory /var/www/>
     Options +ExecCGI
     AddHandler cgi-script .py
     PythonHandler mod_python.publisher
     Options Indexes FollowSymLinks
     AllowOverride None
     Require all granted
</Directory>

<Directory /var/www/html/index.py>
     Options +ExecCGI
</Directory>

*Sorry if these apache2.conf's look like a mess, or have redundant lines, I was trying anything and everything.

Running sudo a2enmod cgi returns:

Your MPM seems to be threaded. Selecting cgid instead of cgi. Module cgid already enabled

The .py scripts are executable and are owned by www-data.

Please HELP! This is so frustrating. What have I not tried? I want this to be the last time I have to do this. Every time I approach Apache, I approach it with fear; maybe it can smell it.



FYI: I have tried all of the (troubleshooting) steps at these sites (and many others):

https://www.linux.com/blog/configuring-apache2-run-python-scripts

https://stackoverflow.com/questions/28138997/cgi-script-downloads-instead-of-running?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa

Why do I get error, Invalid command 'PythonHandler'?

https://superuser.com/questions/174071/apache-serves-py-as-downloadable-file-instead-of-executing-it?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa (returns errror with their solution)

Apache not handling python scripts (*.py) via browser



UPDATE

So, here it is. I used test.py in /var/www/html/ so as not to change the source directory. Maybe something is wrong with my browser or the way I am accessing it?

$ ls -ltr /var/www/html/test.py
-rwxr-xr-x 1 www-data www-data    71 Mar 31 17:29 test.py

$ cat /var/www/html/test.py 
#!/usr/bin/python2

print("Content-type:text/html\n\n")
print("hello")

$ grep -A 3 '<Directory /var/www/html/>'  /etc/apache2/apache2.conf
<Directory /var/www/html/>
     Options +ExecCGI
     AddHandler cgi-script .py
</Directory>

$ ./test.py
Content-type:text/html


hello

I looked in the log files. Nothing odd in access.log, but error.log had an error about mismatched Python versions. According to this link, it shouldn't be a problem. Regardless, I resolved the error by running:

$ apt-get remove libapache2-mod-python libapache2-mod-wsgi
$ apt-get build-dep libapache2-mod-python libapache2-mod-wsgi

Proof: Script downloading

Still no luck. I noticed there was an apache2 service running even after it was stopped. Thinking it may be a zombie process, I terminated all processes (it kept popping up), uninstalled and purged apache2, restarted and tried again.

  • what is the output of the script when run locally? what does access.log and error.log say? – jouell Mar 31 '18 at 21:18
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You're probably close.

Here's the only thing I added to my stock Apache2 setup on Ubuntu

Note the perms

#ls -ltr  /var/www/html/python/char.py 
    -rwxr-xr-x 1 www-data www-data 71 Mar 31 17:16 /var/www/html/python/char.py

Simple python2 script - make sure you do set the content-type

# cat  /var/www/html/python/char.py 
#!/usr/bin/python2

print("Content-type:text/html\n\n")
print("hello")

Runs fine locally

#/var/www/html/python/char.py 
Content-type:text/html


hello

Config

# grep -A 3 '<Directory /var/www/html/python/>'  /etc/apache2/apache2.conf
<Directory /var/www/html/python/>
     Options +ExecCGI
     AddHandler cgi-script .py
</Directory>

Pic of Cgi running

  • Thank you very much for your feedback and time. Please see update. It's not looking good :( – user58446 Apr 1 '18 at 1:02
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I was having the same issue and tried all the troubleshooting steps that you did. The issue in my case was that I had the link to the cgi script in my php file and while my php server was running (using php -S localhost:8000), the cgi script was getting downloaded from the browser. But when I stopped the php server and then accessed the php script from browser using localhost/myScript.php (and hence the cgi from there on a button click), it worked.

So, if you are also running the php server, try stopping it and then run the php file from browser.

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