#!/usr/bin/env python

"""
.. module:: fastagi
   :synopsis: FastAGI service for Asterisk

Requires modified pyst2 to support reading stdin/out/err
 
 Copyright 2011 VOICE1, LLC
 By: Ben Davis <ben@voice1-dot-me>

Specification
-------------
"""

import sys
import SocketServer
import asterisk.agi
# import pkg_resources
# PYST_VERSION = pkg_resources.get_distribution("pyst2").version

__verison__ = 0.1

#TODO: Read options from config file.
HOST, PORT = "127.0.0.1", 4573

class FastAGI(SocketServer.StreamRequestHandler):
    # Close connections not finished in 5seconds.
    timeout = 5
    def handle(self):
        try:
            agi=asterisk.agi.AGI(stdin=self.rfile, stdout=self.wfile, stderr=sys.stderr)
            agi.verbose("pyst2: FastAGI on: {}:{}".format(HOST, PORT))
        except TypeError as e:
            sys.stderr.write('Unable to connect to agi://{} {}\n'.format(self.client_address[0], str(e)))
        except SocketServer.socket.timeout as e:
            sys.stderr.write('Timeout receiving data from {}\n'.format(self.client_address))
        except SocketServer.socket.error as e:
            sys.stderr.write('Could not open the socket. Is someting else listening on this port?\n')
        except Exception as e:
            sys.stderr.write('An unknown error: {}\n'.format(str(e)))

if __name__ == "__main__":
    # server = SocketServer.TCPServer((HOST, PORT), FastAGI)
    server = SocketServer.ForkingTCPServer((HOST, PORT), FastAGI)

    # Keep server running until CTRL-C is pressed.
    server.serve_forever()