Execute legacy CGI in modern web app

cgiexec.py

#!/usr/bin/python
# Execute a cgi script
# Created in order to allow legacy cgi to be used in modern web apps

# Main cgiexec module
from subprocess import Popen, PIPE
import re

# CGI must be dead, i can't get hold of a standard
# For now i am referenceing Apache mod_cgi
# http://httpd.apache.org/docs/current/mod/mod_cgi.html
# Got it: http://graphcomp.com/info/specs/cgi11.html

defaults = {
    'GATEWAY_INTERFACE': 'CGI/1.1',
#    'PATH_INFO': '',
#    'PATH_TRANSLATED': '',
    'QUERY_STRING': '',
    'REMOTE_ADDR': '127.0.0.1',
    'SERVER_NAME': 'localhost',
    'SERVER_PORT': '80',
    'SERVER_PROTOCOL': 'HTTP/1.1',
    'SERVER_SOFTWARE': 'CGIExec'
}

class CGIExec(object):
    """Execute a file as a CGI script
    
    Setup a CGI environment
    """
    def __init__(self, path, env={}, eol='\r\n'):
        self.path = path
        self.env = dict(defaults).update(env)
        self.eol = eol # Output newline, defaults to standard
    
    def run(self, *args):
        """Run the command with the given arguments"""
        if args:
            args = list(args).insert(0, self.path)
        else:
            args = [self.path]
        p = Popen(args, stdout=PIPE, shell=True, env=self.env)
        data = p.communicate()[0]
        # Maybe just return this? So the object remains mostly stateless
        return self.parse_response(data)
        #return page
        
    def parse_response(self, output):
        """Seperate headers from body content"""
        lines = re.split(r'\r\n|\n', output)
        headers = {}
        for idx, opt in enumerate(lines):
            if len(opt.strip()) == 0: break # End of headers
            res = opt.split(':')
            headers[res[0]] = res[1]
        page = self.eol.join(lines[idx+1:])
        return (page, headers)


if __name__ == '__main__':
    c = CGIExec('./test.sh',{})
    print c.run()[0]

test.sh

#!/bin/sh
# Sample CGI script for testing

echo "Content-Type: text/plain"
echo
echo "Hello, World!"