[Asterisk-Users] RE: AGI Flakyness *sigh*

[Douglas Garstang]

Freddi,

Ok... sure... here's the code. It's about as basic as you can get.

#!/usr/bin/python

import time
import string
import sys

class AGI:

    def __init__(self):
        self.env = {}
        while 1:
            line = string.strip(sys.stdin.readline())
            if line == '':
                break
            key,data = string.split(line,':')
            key = string.strip(key)
            data = string.strip(data)
            if key <> '':
                self.env[key] = data

class Call:

    def __init__(self):
        pass

    def route(self):

        self.agi = AGI()
        sys.stdout.write("EXEC " + "\"" + "DIAL" + "\" \"" + "SIP/3250072|5|tr" + "\" " + "\n")
        sys.stdout.flush()
        resMsg = sys.stdin.readline()
        sys.stderr.write('[' + resMsg + "]\n")
        sys.stderr.flush()


def main():

    newCall = Call()
    newCall.route()


main()


Now, here's my Asterisk console output for when a call is connected, and the CALLEE hangs up the call.

*CLI> 
    -- Executing AGI("SIP/10000-3a38", "python/iptrouter2.py|3250072") in new stack
    -- Launched AGI Script /var/lib/asterisk/agi-bin/python/iptrouter2.py
    -- AGI Script Executing Application: (DIAL) Options: (SIP/3250072|5|tr)
    -- Called 3250072
    -- SIP/3250072-7730 is ringing
    -- SIP/3250072-7730 answered SIP/10000-3a38
    -- Attempting native bridge of SIP/10000-3a38 and SIP/3250072-7730
[200 result=-1
]
    -- AGI Script python/iptrouter2.py completed, returning 0
  == Auto fallthrough, channel 'SIP/10000-3a38' status is 'ANSWER'

And here's the console output for when a call is connected, and the CALLER hangs up the call.

*CLI> 
    -- Executing AGI("SIP/10000-6e7b", "python/iptrouter2.py|3250072") in new stack
    -- Launched AGI Script /var/lib/asterisk/agi-bin/python/iptrouter2.py
    -- AGI Script Executing Application: (DIAL) Options: (SIP/3250072|5|tr)
    -- Called 3250072
    -- SIP/3250072-1ee2 is ringing
    -- SIP/3250072-1ee2 answered SIP/10000-6e7b
    -- Attempting native bridge of SIP/10000-6e7b and SIP/3250072-1ee2
  == Spawn extension (OnNet_Outgoing, 3250072, 1) exited non-zero on 'SIP/10000-6e7b'

As you can quite clearly see, Asterisk sends no return code back to the AGI script. I really want to understand why this happens. I also don't like the fact that you don't get a return code from Asterisk for a Dial command until after the call is Hung up. Also, another annoyance. Why can't asterisk send back a return code once the dial is initiated, but before the call is connected? If you don't get a return code until after the call is hung up (and you script has to wait for the result from stdin), how are you supposed to a) perform post call processing and b) check the status of an open call with CHANNEL STATUS?

Doug



-----Original Message-----
From: Freddi Hansen [mailto:fh at danovation.dk]
Sent: Thursday, February 16, 2006 10:00 AM
To: asterisk-users at lists.digium.com
Subject: [Asterisk-Users] RE: AGI Flakyness *sigh*


>
> Subject:
> [Asterisk-Users] AGI Flakyness *sigh*
> From:
> "Douglas Garstang" <dgarstang at oneeighty.com>
> Date:
> Thu, 16 Feb 2006 09:24:26 -0700
>
> To:
> "Asterisk Users Mailing List - Non-Commercial Discussion" 
> <asterisk-users at lists.digium.com>
>
>
> Well, I'm about ready to throw Asterisk across the room.
>
> Can someone tell me WHY, when you've sent a Dial command to Asterisk via AGI, if the callee hangs up the call, Asterisk sends a return code, but if the caller hangs up, it does not???
>
> This means if an agi script services a call, and after the two parties have finished speaking, the person who initiated the call hangs up, the agi script is still waiting for a result from stdin.... waiting.... waiting..... and it never gets anything because Asterisk didn't send a result code. Good grief!
>
> Doug.
>   
Hi,
stop sounding like those people that blame their c-compiler whenever 
they can't compile their 'Hello world'.
I you want help from this list then you shouldn't suggest that all the 
help full people on this list aren't telling the truth when they tell 
you that AGI actually works.
Start reading the wiki pages on requirements for writing our own python 
program and then if it doesn't work: post the script involved and not 
just a few lines from an error output.
Freddi


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