SIP SIMPLE Client SDK

= Developer Guide =

[[TOC(WikiStart, Sip*, depth=2)]]

This sample code implements a minimalist VoIP client.

{{{

from threading import Event

from application.notification import NotificationCenter

from sipsimple.core import SIPURI, ToHeader

from sipsimple.account import AccountManager

from sipsimple.application import SIPApplication

from sipsimple.configuration.backend.file import FileBackend

from sipsimple.lookup import DNSLookup, DNSLookupError

from sipsimple.session import Session

from sipsimple.streams import AudioStream

from sipsimple.util import Route, run_in_green_thread

class SimpleCallApplication(SIPApplication):

    def __init__(self):

        SIPApplication.__init__(self)

        self.ended = Event()

        self.callee = None

        self.session = None

        notification_center = NotificationCenter()

        notification_center.add_observer(self)

    def call(self, callee):

        self.callee = callee

        self.start(FileBackend('config'))

    @run_in_green_thread

    def _NH_SIPApplicationDidStart(self, notification):

        self.callee = ToHeader(SIPURI.parse(self.callee))

        try:

            routes = DNSLookup().lookup_sip_proxy(self.callee.uri, ['udp']).wait()

        except DNSLookupError, e:

            print 'DNS lookup failed: %s' % str(e)

        else:

            account = AccountManager().default_account

            self.session = Session(account)

            self.session.connect(self.callee, routes, [AudioStream(account)])

    def _NH_SIPSessionGotRingIndication(self, notification):

        print 'Ringing!'

    def _NH_SIPSessionDidStart(self, notification):

        print 'Session started!'

    def _NH_SIPSessionDidFail(self, notification):

        print 'Failed to connect'

        self.stop()

    def _NH_SIPSessionDidEnd(self, notification):

        print 'Session ended'

        self.stop()

    def _NH_SIPApplicationDidEnd(self, notification):

        self.ended.set()

# place an audio call to the specified URI

application = SimpleCallApplication()

application.call("sip:3333@ag-projects.com")

print "Placing call, press Enter to quit the program"

raw_input()

application.session.end()

application.ended.wait()

}}}