598 lines
19 KiB
Python
598 lines
19 KiB
Python
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#!/usr/bin/env python
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# vim: set expandtab shiftwidth=4:
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"""
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Python Interface for Asterisk Manager
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This module provides a Python API for interfacing with the asterisk manager.
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import asterisk.manager
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import sys
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def handle_shutdown(event, manager):
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print "Recieved shutdown event"
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manager.close()
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# we could analize the event and reconnect here
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def handle_event(event, manager):
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print "Recieved event: %s" % event.name
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manager = asterisk.manager.Manager()
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try:
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# connect to the manager
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try:
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manager.connect('host')
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manager.login('user', 'secret')
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# register some callbacks
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manager.register_event('Shutdown', handle_shutdown) # shutdown
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manager.register_event('*', handle_event) # catch all
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# get a status report
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response = manager.status()
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manager.logoff()
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except asterisk.manager.ManagerSocketException, (errno, reason):
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print "Error connecting to the manager: %s" % reason
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sys.exit(1)
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except asterisk.manager.ManagerAuthException, reason:
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print "Error logging in to the manager: %s" % reason
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sys.exit(1)
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except asterisk.manager.ManagerException, reason:
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print "Error: %s" % reason
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sys.exit(1)
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finally:
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# remember to clean up
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manager.close()
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Remember all header, response, and event names are case sensitive.
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Not all manager actions are implmented as of yet, feel free to add them
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and submit patches.
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"""
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import sys,os
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import socket
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import threading
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import Queue
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import re
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from cStringIO import StringIO
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from types import *
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from time import sleep
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EOL = '\r\n'
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class ManagerMsg(object):
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"""A manager interface message"""
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def __init__(self, response):
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self.response = response # the raw response, straight from the horse's mouth
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self.data = ''
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self.headers = {}
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# parse the response
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self.parse(response)
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if not self.headers:
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# Bad app not returning any headers. Let's fake it
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# this could also be the inital greeting
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self.headers['Response'] = 'Generated Header'
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# 'Response:'
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def parse(self, response):
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"""Parse a manager message"""
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response.seek(0)
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data = []
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# read the response line by line
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for line in response.readlines():
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line = line.rstrip() # strip trailing whitespace
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if not line: continue # don't process if this is not a message
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# locate the ':' in our message, if there is one
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if line.find(':') > -1:
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item = [x.strip() for x in line.split(':',1)]
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# if this is a header
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if len(item) == 2:
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# store the header
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self.headers[item[0]] = item[1]
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# otherwise it is just plain data
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else:
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data.append(line)
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# if there was no ':', then we have data
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else:
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data.append(line)
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# store the data
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self.data = '%s\n' % '\n'.join(data)
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def has_header(self, hname):
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"""Check for a header"""
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return self.headers.has_key(hname)
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def get_header(self, hname):
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"""Return the specfied header"""
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return self.headers[hname]
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def __getitem__(self, hname):
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"""Return the specfied header"""
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return self.headers[hname]
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def __repr__(self):
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return self.headers['Response']
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class Event(object):
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"""Manager interface Events, __init__ expects and 'Event' message"""
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def __init__(self, message):
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# store all of the event data
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self.message = message
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self.data = message.data
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self.headers = message.headers
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# if this is not an event message we have a problem
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if not message.has_header('Event'):
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raise ManagerException('Trying to create event from non event message')
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# get the event name
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self.name = message.get_header('Event')
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def has_header(self, hname):
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"""Check for a header"""
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return self.headers.has_key(hname)
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def get_header(self, hname):
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"""Return the specfied header"""
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return self.headers[hname]
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def __getitem__(self, hname):
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"""Return the specfied header"""
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return self.headers[hname]
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def __repr__(self):
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return self.headers['Event']
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def get_action_id(self):
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return self.headers.get('ActionID',0000)
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class Manager(object):
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def __init__(self):
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self._sock = None # our socket
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self._connected = threading.Event()
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self._running = threading.Event()
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# our hostname
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self.hostname = socket.gethostname()
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# our queues
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self._message_queue = Queue.Queue()
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self._response_queue = Queue.Queue()
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self._event_queue = Queue.Queue()
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# callbacks for events
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self._event_callbacks = {}
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self._reswaiting = [] # who is waiting for a response
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# sequence stuff
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self._seqlock = threading.Lock()
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self._seq = 0
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# some threads
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self.message_thread = threading.Thread(target=self.message_loop)
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self.event_dispatch_thread = threading.Thread(target=self.event_dispatch)
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self.message_thread.setDaemon(True)
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self.event_dispatch_thread.setDaemon(True)
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def __del__(self):
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self.close()
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def connected(self):
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"""
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Check if we are connected or not.
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"""
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return self._connected.isSet()
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def next_seq(self):
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"""Return the next number in the sequence, this is used for ActionID"""
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self._seqlock.acquire()
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try:
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return self._seq
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finally:
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self._seq += 1
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self._seqlock.release()
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def send_action(self, cdict={}, **kwargs):
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"""
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Send a command to the manager
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If a list is passed to the cdict argument, each item in the list will
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be sent to asterisk under the same header in the following manner:
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cdict = {"Action": "Originate",
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"Variable": ["var1=value", "var2=value"]}
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send_action(cdict)
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...
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Action: Originate
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Variable: var1=value
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Variable: var2=value
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"""
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if not self._connected.isSet():
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raise ManagerException("Not connected")
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# fill in our args
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cdict.update(kwargs)
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# set the action id
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if not cdict.has_key('ActionID'): cdict['ActionID'] = '%s-%08x' % (self.hostname, self.next_seq())
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clist = []
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# generate the command
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for key, value in cdict.items():
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if isinstance(value, list):
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for item in value:
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item = tuple([key, item])
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clist.append('%s: %s' % item)
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else:
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item = tuple([key, value])
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clist.append('%s: %s' % item)
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clist.append(EOL)
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command = EOL.join(clist)
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# lock the soket and send our command
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try:
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self._sock.sendall(command)
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except socket.error, (errno, reason):
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raise ManagerSocketException(errno, reason)
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self._reswaiting.insert(0,1)
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response = self._response_queue.get()
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self._reswaiting.pop(0)
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if not response:
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raise ManagerSocketException(0, 'Connection Terminated')
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return response
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def _receive_data(self):
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"""
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Read the response from a command.
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"""
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# loop while we are sill running and connected
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while self._running.isSet() and self._connected.isSet():
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lines = []
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try:
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try:
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# if there is data to be read
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# read a message
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while self._connected.isSet():
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line = []
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# read a line, one char at a time
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while self._connected.isSet():
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c = self._sock.recv(1)
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if not c: # the other end closed the connection
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self._sock.close()
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self._connected.clear()
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break
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line.append(c) # append the character to our line
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# is this the end of a line?
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if c == '\n':
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line = ''.join(line)
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break
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# if we are no longer connected we probably did not
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# recieve a full message, don't try to handle it
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if not self._connected.isSet(): break
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# make sure our line is a string
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assert type(line) in StringTypes
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lines.append(line) # add the line to our message
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# if the line is our EOL marker we have a complete message
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if line == EOL:
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break
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# check to see if this is the greeting line
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if line.find('/') >= 0 and line.find(':') < 0:
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self.title = line.split('/')[0].strip() # store the title of the manager we are connecting to
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self.version = line.split('/')[1].strip() # store the version of the manager we are connecting to
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break
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#sleep(.001) # waste some time before reading another line
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except socket.error:
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self._sock.close()
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self._connected.clear()
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break
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finally:
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# if we have a message append it to our queue
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if lines and self._connected.isSet():
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self._message_queue.put(StringIO(''.join(lines)))
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else:
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self._message_queue.put(None)
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def register_event(self, event, function):
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"""
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Register a callback for the specfied event.
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If a callback function returns True, no more callbacks for that
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event will be executed.
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"""
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# get the current value, or an empty list
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# then add our new callback
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current_callbacks = self._event_callbacks.get(event, [])
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current_callbacks.append(function)
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self._event_callbacks[event] = current_callbacks
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def unregister_event(self, event, function):
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"""
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Unregister a callback for the specified event.
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"""
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current_callbacks = self._event_callbacks.get(event, [])
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current_callbacks.remove(function)
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self._event_callbacks[event] = current_callbacks
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def message_loop(self):
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"""
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The method for the event thread.
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This actually recieves all types of messages and places them
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in the proper queues.
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"""
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# start a thread to recieve data
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t = threading.Thread(target=self._receive_data)
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t.setDaemon(True)
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t.start()
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try:
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# loop getting messages from the queue
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while self._running.isSet():
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# get/wait for messages
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data = self._message_queue.get()
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# if we got None as our message we are done
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if not data:
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# notify the other queues
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self._event_queue.put(None)
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for waiter in self._reswaiting:
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self._response_queue.put(None)
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break
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# parse the data
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message = ManagerMsg(data)
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# check if this is an event message
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if message.has_header('Event'):
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self._event_queue.put(Event(message))
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# check if this is a response
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elif message.has_header('Response'):
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self._response_queue.put(message)
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# this is an unknown message
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else:
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print 'No clue what we got\n%s' % message.data
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finally:
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# wait for our data receiving thread to exit
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t.join()
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def event_dispatch(self):
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"""This thread is responsible fore dispatching events"""
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# loop dispatching events
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while self._running.isSet():
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# get/wait for an event
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ev = self._event_queue.get()
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# if we got None as an event, we are finished
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if not ev:
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break
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# dispatch our events
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# first build a list of the functions to execute
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callbacks = self._event_callbacks.get(ev.name, [])
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callbacks.extend(self._event_callbacks.get('*', []))
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# now execute the functions
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for callback in callbacks:
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|
|
if callback(ev, self):
|
||
|
|
break
|
||
|
|
|
||
|
|
def connect(self, host, port=5038):
|
||
|
|
"""Connect to the manager interface"""
|
||
|
|
|
||
|
|
if self._connected.isSet():
|
||
|
|
raise ManagerException('Already connected to manager')
|
||
|
|
|
||
|
|
# make sure host is a string
|
||
|
|
assert type(host) in StringTypes
|
||
|
|
|
||
|
|
port = int(port) # make sure port is an int
|
||
|
|
|
||
|
|
# create our socket and connect
|
||
|
|
try:
|
||
|
|
self._sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
|
||
|
|
self._sock.connect((host,port))
|
||
|
|
except socket.error, (errno, reason):
|
||
|
|
raise ManagerSocketException(errno, reason)
|
||
|
|
|
||
|
|
# we are connected and running
|
||
|
|
self._connected.set()
|
||
|
|
self._running.set()
|
||
|
|
|
||
|
|
# start the event thread
|
||
|
|
self.message_thread.start()
|
||
|
|
|
||
|
|
# start the event dispatching thread
|
||
|
|
self.event_dispatch_thread.start()
|
||
|
|
|
||
|
|
# get our initial connection response
|
||
|
|
return self._response_queue.get()
|
||
|
|
|
||
|
|
def close(self):
|
||
|
|
"""Shutdown the connection to the manager"""
|
||
|
|
|
||
|
|
# if we are still running, logout
|
||
|
|
if self._running.isSet() and self._connected.isSet():
|
||
|
|
self.logoff()
|
||
|
|
|
||
|
|
if self._running.isSet():
|
||
|
|
# put None in the message_queue to kill our threads
|
||
|
|
self._message_queue.put(None)
|
||
|
|
|
||
|
|
# wait for the event thread to exit
|
||
|
|
self.message_thread.join()
|
||
|
|
|
||
|
|
# make sure we do not join our self (when close is called from event handlers)
|
||
|
|
if threading.currentThread() != self.event_dispatch_thread:
|
||
|
|
# wait for the dispatch thread to exit
|
||
|
|
self.event_dispatch_thread.join()
|
||
|
|
|
||
|
|
self._running.clear()
|
||
|
|
|
||
|
|
|
||
|
|
def login(self, username, secret):
|
||
|
|
"""Login to the manager, throws ManagerAuthException when login falis"""
|
||
|
|
|
||
|
|
cdict = {'Action':'Login'}
|
||
|
|
cdict['Username'] = username
|
||
|
|
cdict['Secret'] = secret
|
||
|
|
response = self.send_action(cdict)
|
||
|
|
|
||
|
|
if response.get_header('Response') == 'Error':
|
||
|
|
raise ManagerAuthException(response.get_header('Message'))
|
||
|
|
|
||
|
|
return response
|
||
|
|
|
||
|
|
def ping(self):
|
||
|
|
"""Send a ping action to the manager"""
|
||
|
|
cdict = {'Action':'Ping'}
|
||
|
|
response = self.send_action(cdict)
|
||
|
|
return response
|
||
|
|
|
||
|
|
def logoff(self):
|
||
|
|
"""Logoff from the manager"""
|
||
|
|
|
||
|
|
cdict = {'Action':'Logoff'}
|
||
|
|
response = self.send_action(cdict)
|
||
|
|
|
||
|
|
return response
|
||
|
|
|
||
|
|
def hangup(self, channel):
|
||
|
|
"""Hanup the specfied channel"""
|
||
|
|
|
||
|
|
cdict = {'Action':'Hangup'}
|
||
|
|
cdict['Channel'] = channel
|
||
|
|
response = self.send_action(cdict)
|
||
|
|
|
||
|
|
return response
|
||
|
|
|
||
|
|
def status(self, channel = ''):
|
||
|
|
"""Get a status message from asterisk"""
|
||
|
|
|
||
|
|
cdict = {'Action':'Status'}
|
||
|
|
cdict['Channel'] = channel
|
||
|
|
response = self.send_action(cdict)
|
||
|
|
|
||
|
|
return response
|
||
|
|
|
||
|
|
def redirect(self, channel, exten, priority='1', extra_channel='', context=''):
|
||
|
|
"""Redirect a channel"""
|
||
|
|
|
||
|
|
cdict = {'Action':'Redirect'}
|
||
|
|
cdict['Channel'] = channel
|
||
|
|
cdict['Exten'] = exten
|
||
|
|
cdict['Priority'] = priority
|
||
|
|
if context: cdict['Context'] = context
|
||
|
|
if extra_channel: cdict['ExtraChannel'] = extra_channel
|
||
|
|
response = self.send_action(cdict)
|
||
|
|
|
||
|
|
return response
|
||
|
|
|
||
|
|
def originate(self, channel, exten, context='', priority='', timeout='', caller_id='', async=False, account='', variables={}):
|
||
|
|
"""Originate a call"""
|
||
|
|
|
||
|
|
cdict = {'Action':'Originate'}
|
||
|
|
cdict['Channel'] = channel
|
||
|
|
cdict['Exten'] = exten
|
||
|
|
if context: cdict['Context'] = context
|
||
|
|
if priority: cdict['Priority'] = priority
|
||
|
|
if timeout: cdict['Timeout'] = timeout
|
||
|
|
if caller_id: cdict['CallerID'] = caller_id
|
||
|
|
if async: cdict['Async'] = 'yes'
|
||
|
|
if account: cdict['Account'] = account
|
||
|
|
# join dict of vairables together in a string in the form of 'key=val|key=val'
|
||
|
|
# with the latest CVS HEAD this is no longer necessary
|
||
|
|
# if variables: cdict['Variable'] = '|'.join(['='.join((str(key), str(value))) for key, value in variables.items()])
|
||
|
|
if variables: cdict['Variable'] = ['='.join((str(key), str(value))) for key, value in variables.items()]
|
||
|
|
|
||
|
|
response = self.send_action(cdict)
|
||
|
|
|
||
|
|
return response
|
||
|
|
|
||
|
|
def mailbox_status(self, mailbox):
|
||
|
|
"""Get the status of the specfied mailbox"""
|
||
|
|
|
||
|
|
cdict = {'Action':'MailboxStatus'}
|
||
|
|
cdict['Mailbox'] = mailbox
|
||
|
|
response = self.send_action(cdict)
|
||
|
|
|
||
|
|
return response
|
||
|
|
|
||
|
|
def command(self, command):
|
||
|
|
"""Execute a command"""
|
||
|
|
|
||
|
|
cdict = {'Action':'Command'}
|
||
|
|
cdict['Command'] = command
|
||
|
|
response = self.send_action(cdict)
|
||
|
|
|
||
|
|
return response
|
||
|
|
|
||
|
|
def extension_state(self, exten, context):
|
||
|
|
"""Get the state of an extension"""
|
||
|
|
|
||
|
|
cdict = {'Action':'ExtensionState'}
|
||
|
|
cdict['Exten'] = exten
|
||
|
|
cdict['Context'] = context
|
||
|
|
response = self.send_action(cdict)
|
||
|
|
|
||
|
|
return response
|
||
|
|
|
||
|
|
def absolute_timeout(self, channel, timeout):
|
||
|
|
"""Set an absolute timeout on a channel"""
|
||
|
|
|
||
|
|
cdict = {'Action':'AbsoluteTimeout'}
|
||
|
|
cdict['Channel'] = channel
|
||
|
|
cdict['Timeout'] = timeout
|
||
|
|
response = self.send_action(cdict)
|
||
|
|
|
||
|
|
return response
|
||
|
|
|
||
|
|
def mailbox_count(self, mailbox):
|
||
|
|
cdict = {'Action':'MailboxCount'}
|
||
|
|
cdict['Mailbox'] = mailbox
|
||
|
|
response = self.send_action(cdict)
|
||
|
|
|
||
|
|
return response
|
||
|
|
|
||
|
|
class ManagerException(Exception): pass
|
||
|
|
class ManagerSocketException(ManagerException): pass
|
||
|
|
class ManagerAuthException(ManagerException): pass
|
||
|
|
|