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# -*- coding: utf-8 -*-
# MonAMI Asterisk Manger Interface server
# FreeSWITCH event socket interface
# (c) AMOOMA GmbH 2012
from threading import Thread, Lock
from log import ldebug, linfo, lwarn, lerror, lcritic
from collections import deque
from time import sleep, time
from random import random
from helper import to_hash
from traceback import format_exc
import socket
import sys
import hashlib
class FreeswitchEventSocket(Thread):
def __init__(self, host, port, password):
Thread.__init__(self)
self.LINE_SEPARATOR = "\n"
self.SOCKET_TIMEOUT = 1
self.MESSAGE_PIPE_MAX_LENGTH = 128
self.write_lock = Lock()
self.host = host
self.port = port
self.password = password
self.runthread = True
self.fs = None
self.client_queues = {}
def stop(self):
ldebug('thread stop', self)
self.runthread = False
def run(self):
ldebug('starting FreeSWITCH event_socket thread', self)
while self.runthread:
if not self.connect():
ldebug('could not connect to FreeSWITCH - retry', self)
sleep(self.SOCKET_TIMEOUT)
continue
ldebug('opening event_socket connection', self)
data = ''
while self.runthread and self.fs:
try:
recv_buffer = self.fs.recv(128)
except socket.timeout as exception:
# Socket timeout occured
continue
except:
lerror(format_exc(), self)
self.runthread = False
break
if not recv_buffer:
ldebug('event_socket connection lost', self)
break
data += recv_buffer
messages = data.split(self.LINE_SEPARATOR * 2)
data = messages.pop()
for message_str in messages:
if not message_str:
continue
message_body = None
message = to_hash(message_str.split(self.LINE_SEPARATOR))
if not 'Content-Type' in message:
ldebug('message without Content-Type', self)
continue
if 'Content-Length' in message and int(message['Content-Length']) > 0:
content_length = int(message['Content-Length'])
while len(data) < int(message['Content-Length']):
try:
data += self.fs.recv(content_length - len(data))
except socket.timeout as exception:
ldebug('Socket timeout in message body', self)
continue
except:
lerror(format_exc(), self)
break
message_body = data.strip()
data = ''
else:
content_length = 0
self.process_message(message['Content-Type'], message, content_length, message_body)
ldebug('closing event_socket connection', self)
if self.fs:
self.fs.close()
def connect(self):
fs = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
try:
fs.connect((self.host, self.port))
except:
lerror(format_exc(), self)
return False
fs.settimeout(self.SOCKET_TIMEOUT)
self.fs = fs
return True
def authenticate(self):
ldebug('send authentication to FreeSWITCH', self)
self.send_message("auth %s" % self.password)
def send(self, send_buffer):
try:
self.write_lock.acquire()
self.fs.send(send_buffer)
self.write_lock.release()
return True
except:
return False
def send_message(self, *message):
if len(message) == 1 and type(message[0]) == list:
self.send(self.LINE_SEPARATOR.join(message[0]) + (self.LINE_SEPARATOR * 2))
else:
self.send(self.LINE_SEPARATOR.join(message) + (self.LINE_SEPARATOR * 2))
def process_message(self, content_type, message_head, content_length, message_body):
if content_type == 'auth/request':
self.authenticate()
if content_type == 'command/reply':
if 'Reply-Text' in message_head:
ldebug('FreeSWITCH command reply: %s' % message_head['Reply-Text'], self)
elif content_type == 'text/event-plain':
event = to_hash(message_body.split(self.LINE_SEPARATOR))
if 'Event-Name' in event and event['Event-Name'] in self.client_queues:
event_type = event['Event-Name']
for entry_id, message_pipe in self.client_queues[event_type].items():
if type(message_pipe) == deque:
if len(message_pipe) < self.MESSAGE_PIPE_MAX_LENGTH:
message_pipe.appendleft({'type': 'freeswitch_event', 'body': event})
else:
lwarn("event queue %d full" % entry_id)
else:
ldebug("force-deregister event queue %d for event type %s" % (entry_id, event_type), self)
del self.client_queues[event_type][entry_id]
def register_client_queue(self, queue, event_type):
if not event_type in self.client_queues:
self.client_queues[event_type] = {}
self.send_message("event plain all %s" % event_type)
ldebug("we are listening now to events of type: %s" % event_type, self)
self.client_queues[event_type][id(queue)] = queue
ldebug("event queue %d registered for event type: %s" % (id(queue), event_type), self)
def deregister_client_queue(self, queue, event_type):
ldebug("deregister event queue %d for event type %s" % (id(queue), event_type), self)
del self.client_queues[event_type][id(queue)]
def deregister_client_queue_all(self, queue):
for event_type, event_queues in self.client_queues.items():
if id(queue) in event_queues:
ldebug("deregister event queue %d for all registered event types - event type %s" % (id(queue), event_type), self)
del self.client_queues[event_type][id(queue)]
def hangup(self, uuid, hangup_cause = 'NORMAL_CLEARING'):
ldebug('hangup channel: %s' % uuid, self)
self.send_message('SendMsg %s' % uuid, 'call-command: hangup', 'hangup-cause: %s' % hangup_cause)
return True
def originate(self, sip_account, extension, action_id = ''):
uuid = hashlib.md5('%s%f' % (sip_account, random() * 65534)).hexdigest()
ldebug('originate call - from: %s, to: %s, uuid: %s' % (sip_account, extension, uuid), self)
self.send_message('bgapi originate {origination_uuid=%s,origination_action=%s,origination_caller_id_number=%s}user/%s %s' % (uuid, action_id, sip_account, sip_account, extension))
return uuid
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