asterisk users - Sep 2004 - AGI Python Clear or Channel Failure?

On Fri, 2004-09-17 at 09:01, Martyn Russell wrote:
> Is there any way to know if the return code (-1) is a clear or channel
> failure?
Does it matter. If you receive a -1 you know the line is no longer
available and no other commands will be accepted. So all that is left
for your app is to clean itself up and exit.

-- 
Steven Critchfield <critch@basesys.com>

Hi All,

When I call the stream_file function all goes well if the user doesn't
clear the call.  But if I do clear the call (on the handset for
example), I get the following exception:

            -- Channel 0/31, span 1 got hangup
            RESULT_LINE: 200 result=-1 endpos=28000
          == Spawn extension (default, 600006, 1) exited non-zero on
        'Zap/31-1'
            RESULT_DICT: {'result': ('-1', ''),
'endpos': ('28000', '')}
        Traceback (most recent call last):
          File "/var/lib/asterisk/agi-bin/clickdial.py", line 450, in
?
            d = agi.stream_file("bt_clickdial_welcome",
"0123456789");
          File "/var/lib/asterisk/agi-bin/clickdial.py", line 179, in
        stream_file
            -- Hungup 'Zap/31-1'
            raise AGIException('Channel falure on channel %s' %
        self.env.get('agi_channel','UNKNOWN'))
        __main__.AGIException: Channel falure on channel Zap/31-1


This is easily managed by using exception handling, AND I can look for
the return code (which for all the functions I am using returns) -1 to
know if it was a channel failure or hang up. From the output (above),
Asterisk knows the call has hung up, I assume it does anyway because of
the line:

	    -- Hungup 'Zap/31-1'
        
Is there any way to know if the return code (-1) is a clear or channel
failure?

Thanks,

-- 
Regards,
Martyn