CGI script downloads instead of running

I'm running apache2 server. CGIHTTPServer is running in directory /mnt/hgfs/wind/BTech_BTP/BTP/code/final_code/ . I'm using the url http://localhost:8000/test/www/adder.html .

I have three file in ../final_code/test/www directory.

adder.html contains:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>Adder</title>
  </head>
  <body>
    <h1>Fantastic Adder - Sum Two Numbers<br></h1>
    <br>
    <form action="adder.cgi" method="get" enctype="multipart/form-data">Number
      1:<input maxlength="60" size="60" value="0" name="x"> <br>
      <br>
      Number 2:<input name="y" value="0" maxlength="60" size="60"><br>
      <br>
      &nbsp; <input value="Find Sum" type="submit">
    </form>
  </body>
</html>

adder.cgi contains

#!/usr/bin/env python3

import cgi   # NEW

def main(): # NEW except for the call to processInput
    form = cgi.FieldStorage()      # standard cgi script lines to here!

    # use format of next two lines with YOUR names and default data
    numStr1 = form.getfirst("x", "0") # get the form value associated with form
                                   # name 'x'.  Use default "0" if there is none. 
    numStr2 = form.getfirst("y", "0") # similarly for name 'y'
    contents = processInput(numStr1, numStr2)   # process input into a page
    print(contents)

def processInput(numStr1, numStr2):  
    '''Process input parameters and return the final page as a string.'''
    num1 = int(numStr1) # transform input to output data
    num2 = int(numStr2)
    total = num1+num2
    return fileToStr('additionTemplate.html').format(**locals())

# standard code for future cgi scripts from here on
def fileToStr(fileName): 
    """Return a string containing the contents of the named file."""
    fin = open(fileName); 
    contents = fin.read();  
    fin.close() 
    return contents

try:   # NEW
    print("Content-type: text/htmlnn")   # say generating html
    main() 
except:
    cgi.print_exception()                 # catch and print errors

When i hit the submit button in browser, it downloads the adder.cgi file instead of executing it???

Also, if you need to see any configuration file, please do let me know.

Edit1: this is my apache2.conf file after editing.

# This is the main Apache server configuration file.  It contains the
# configuration directives that give the server its instructions.
# See http://httpd.apache.org/docs/2.4/ for detailed information about
# the directives and /usr/share/doc/apache2/README.Debian about Debian specific
# hints.
#
#
# Summary of how the Apache 2 configuration works in Debian:
# The Apache 2 web server configuration in Debian is quite different to
# upstream's suggested way to configure the web server. This is because Debian's
# default Apache2 installation attempts to make adding and removing modules,
# virtual hosts, and extra configuration directives as flexible as possible, in
# order to make automating the changes and administering the server as easy as
# possible.

# It is split into several files forming the configuration hierarchy outlined
# below, all located in the /etc/apache2/ directory:
#
#   /etc/apache2/
#   |-- apache2.conf
#   |   `--  ports.conf
#   |-- mods-enabled
#   |   |-- *.load
#   |   `-- *.conf
#   |-- conf-enabled
#   |   `-- *.conf
#   `-- sites-enabled
#       `-- *.conf
#
#
# * apache2.conf is the main configuration file (this file). It puts the pieces
#   together by including all remaining configuration files when starting up the
#   web server.
#
# * ports.conf is always included from the main configuration file. It is
#   supposed to determine listening ports for incoming connections which can be
#   customized anytime.
#
# * Configuration files in the mods-enabled/, conf-enabled/ and sites-enabled/
#   directories contain particular configuration snippets which manage modules,
#   global configuration fragments, or virtual host configurations,
#   respectively.
#
#   They are activated by symlinking available configuration files from their
#   respective *-available/ counterparts. These should be managed by using our
#   helpers a2enmod/a2dismod, a2ensite/a2dissite and a2enconf/a2disconf. See
#   their respective man pages for detailed information.
#
# * The binary is called apache2. Due to the use of environment variables, in
#   the default configuration, apache2 needs to be started/stopped with
#   /etc/init.d/apache2 or apache2ctl. Calling /usr/bin/apache2 directly will not
#   work with the default configuration.


# Global configuration
#

#
# ServerRoot: The top of the directory tree under which the server's
# configuration, error, and log files are kept.
#
# NOTE!  If you intend to place this on an NFS (or otherwise network)
# mounted filesystem then please read the Mutex documentation (available
# at <URL:http://httpd.apache.org/docs/2.4/mod/core.html#mutex>);
# you will save yourself a lot of trouble.
#
# Do NOT add a slash at the end of the directory path.
#
#ServerRoot "/etc/apache2"

#
# The accept serialization lock file MUST BE STORED ON A LOCAL DISK.
#
Mutex file:${APACHE_LOCK_DIR} default

#RemoveHandler cgi-script .cgi .pl .plx .ppl .perl .py

#
# PidFile: The file in which the server should record its process
# identification number when it starts.
# This needs to be set in /etc/apache2/envvars
#
PidFile ${APACHE_PID_FILE}

#
# Timeout: The number of seconds before receives and sends time out.
#
Timeout 300

#
# KeepAlive: Whether or not to allow persistent connections (more than
# one request per connection). Set to "Off" to deactivate.
#
KeepAlive On

#
# MaxKeepAliveRequests: The maximum number of requests to allow
# during a persistent connection. Set to 0 to allow an unlimited amount.
# We recommend you leave this number high, for maximum performance.
#
MaxKeepAliveRequests 100

#
# KeepAliveTimeout: Number of seconds to wait for the next request from the
# same client on the same connection.
#
KeepAliveTimeout 5


# These need to be set in /etc/apache2/envvars
User ${APACHE_RUN_USER}
Group ${APACHE_RUN_GROUP}

#
# HostnameLookups: Log the names of clients or just their IP addresses
# e.g., www.apache.org (on) or 204.62.129.132 (off).
# The default is off because it'd be overall better for the net if people
# had to knowingly turn this feature on, since enabling it means that
# each client request will result in AT LEAST one lookup request to the
# nameserver.
#
HostnameLookups Off

# ErrorLog: The location of the error log file.
# If you do not specify an ErrorLog directive within a <VirtualHost>
# container, error messages relating to that virtual host will be
# logged here.  If you *do* define an error logfile for a <VirtualHost>
# container, that host's errors will be logged there and not here.
#
ErrorLog ${APACHE_LOG_DIR}/error.log

#
# LogLevel: Control the severity of messages logged to the error_log.
# Available values: trace8, ..., trace1, debug, info, notice, warn,
# error, crit, alert, emerg.
# It is also possible to configure the log level for particular modules, e.g.
# "LogLevel info ssl:warn"
#
LogLevel warn

# Include module configuration:
IncludeOptional mods-enabled/*.load
IncludeOptional mods-enabled/*.conf

# Include list of ports to listen on
Include ports.conf


# Sets the default security model of the Apache2 HTTPD server. It does
# not allow access to the root filesystem outside of /usr/share and /var/www.
# The former is used by web applications packaged in Debian,
# the latter may be used for local directories served by the web server. If
# your system is serving content from a sub-directory in /srv you must allow
# access here, or in any related virtual host.
<Directory />
    Options FollowSymLinks
    AllowOverride None
    Require all denied
</Directory>

<Directory /usr/share>
    AllowOverride None
    Require all granted
</Directory>

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

#<Directory /srv/>
#   Options Indexes FollowSymLinks
#   AllowOverride None
#   Require all granted
#</Directory>




# AccessFileName: The name of the file to look for in each directory
# for additional configuration directives.  See also the AllowOverride
# directive.
#
AccessFileName .htaccess

#
# The following lines prevent .htaccess and .htpasswd files from being
# viewed by Web clients.
#
<FilesMatch "^.ht">
    Require all denied
</FilesMatch>


#
# The following directives define some format nicknames for use with
# a CustomLog directive.
#
# These deviate from the Common Log Format definitions in that they use %O
# (the actual bytes sent including headers) instead of %b (the size of the
# requested file), because the latter makes it impossible to detect partial
# requests.
#
# Note that the use of %{X-Forwarded-For}i instead of %h is not recommended.
# Use mod_remoteip instead.
#
LogFormat "%v:%p %h %l %u %t "%r" %>s %O "%{Referer}i" "%{User-Agent}i"" vhost_combined
LogFormat "%h %l %u %t "%r" %>s %O "%{Referer}i" "%{User-Agent}i"" combined
LogFormat "%h %l %u %t "%r" %>s %O" common
LogFormat "%{Referer}i -> %U" referer
LogFormat "%{User-agent}i" agent

# Include of directories ignores editors' and dpkg's backup files,
# see README.Debian for details.

# Include generic snippets of statements
IncludeOptional conf-enabled/*.conf

# Include the virtual host configurations:
IncludeOptional sites-enabled/*.conf

# vim: syntax=apache ts=4 sw=4 sts=4 sr noet
Include /etc/phpmyadmin/apache.conf

Still not working?


You need to teach your Apache installation how to deal with CGI scripts by modifying your .conf file. Check this link out. If your Apache server doesn't have instructions on how to deal with a .cgi extension then it will treat it as any other plain file on the server (which is to serve the file as a client-side file and not server-side code that should be executed/parsed).

An example configuration:

DocumentRoot /var/www

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

I note you have a CGI with python.

First: you must install the python module for apache:
In ubuntu for example is:

sudo apt-get install libapache2-mod-python

Next you must configure apache so it can read python files:
Edit /etc/apache2/apache2.conf and add this lines to end of file: (change /var/www to your document root)

<Directory /var/www/>
    AddHandler mod_python .py
    PythonHandler mod_python.publisher
</Directory>

And finally restart apache:

sudo /etc/init.d/apache2 restart
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