Develop Reference

PJSUA2 python swig module

I'm trying to write a simple SIP agent to receive a call using PJSUA2 python swig module, but can't see how this swig module works. I've got the following code
import pjsua2 as pj
import time
class Endpoint(pj.Endpoint):
"""
This is high level Python object inherited from pj.Endpoint
"""
instance = None
def __init__(self):
pj.Endpoint.__init__(self)
Endpoint.instance = self
def validateUri(uri):
return Endpoint.instance.utilVerifyUri(uri) == pj.PJ_SUCCESS
def validateSipUri(uri):
return Endpoint.instance.utilVerifySipUri(uri) == pj.PJ_SUCCESS
# Call class
class Call(pj.Call):
"""
High level Python Call object, derived from pjsua2's Call object.
"""
def __init__(self, acc, peer_uri='', call_id=pj.PJSUA_INVALID_ID):
pj.Call.__init__(self, acc, call_id)
self.acc = acc
self.peerUri = peer_uri
self.connected = False
self.onhold = False
def onCallState(self, prm):
ci = self.getInfo()
self.connected = ci.state == pj.PJSIP_INV_STATE_CONFIRMED
def onCallMediaState(self, prm):
ci = self.getInfo()
for mi in ci.media:
if mi.type == pj.PJMEDIA_TYPE_AUDIO and \
(mi.status == pj.PJSUA_CALL_MEDIA_ACTIVE or
mi.status == pj.PJSUA_CALL_MEDIA_REMOTE_HOLD):
m = self.getMedia(mi.index)
am = pj.AudioMedia.typecastFromMedia(m)
# connect ports
Endpoint.instance.audDevManager().getCaptureDevMedia().startTransmit(am)
am.startTransmit(Endpoint.instance.audDevManager().getPlaybackDevMedia())
if mi.status == pj.PJSUA_CALL_MEDIA_REMOTE_HOLD and not self.onhold:
print("'%s' sets call onhold" % self.peerUri)
self.onhold = True
elif mi.status == pj.PJSUA_CALL_MEDIA_ACTIVE and self.onhold:
print("'%s' sets call active" % self.peerUri)
self.onhold = False
def onDtmfDigit(self, prm):
# print("Got DTMF:" + prm.digit)
pass
def onCallMediaTransportState(self, prm):
# print("Media transport state")
pass
class Account(pj.Account):
def onRegState(self, prm):
print("***OnRegState: " + prm.reason)
def onMwiInfo(self, prm):
print("OnMwiState: " + prm.reason)
def onBuddyState(self, prm):
print("OnBuddyState: " + prm.reason)
def onIncommingSubscribe(self, prm):
print("OnSubscribeState: " + prm.reason)
def OnIncomingCall(self, prm):
c = Call(self, call_id=prm.callId)
call_prm = pj.CallOpParam()
call_prm.statusCode = 180
c.answer(call_prm)
ci = c.getInfo()
if input(f"Accept call from {ci.remoteUri}?") == u'yes':
call_prm.statusCode = 200
c.answer(call_prm)
else:
c.hangup(call_prm)
def initalise_sip_stack():
ep_cfg = pj.EpConfig()
ep = Endpoint()
ep.libCreate()
ep.libInit(ep_cfg)
sip_tp_config = pj.TransportConfig()
sip_tp_config.port = 5060
ep.transportCreate(pj.PJSIP_TRANSPORT_UDP, sip_tp_config)
ep.libStart()
acfg = pj.AccountConfig()
acfg.idUri = "sip:056004#172.20.1.8"
acfg.regConfig.registrarUri = "sip:172.20.1.8"
creds = pj.AuthCredInfo("digest", "*", "056004", 0, "somepass")
acfg.sipConfig.authCreds.append(creds)
acc = Account()
acc.create(acfg)
return ep
if __name__ == "__main__":
endpoint = initalise_sip_stack()
time.sleep(600)
endpoint.libDestroy()
This little client is able to register in my asterisk server as you can see
raspberrypi*CLI> pjsip show contacts
Contact: <Aor/ContactUri..............................> <Hash....> <Status> <RTT(ms)..>
==========================================================================================
Contact: 056003/sip:056003#172.20.1.13:5060 058bca1427 Avail 41.057
Contact: 056004/sip:056004#172.20.1.2:5060;ob e8ff0c4e2b Avail 2.358
Objects found: 2
However, when I place a call from 056003 contact, I can see the following trace from pjsua2:
16:52:37.918 pjsua_core.c .RX 947 bytes Request msg INVITE/cseq=23923 (rdata0x7f5f6c001c48) from UDP 172.20.1.8:5060:
INVITE sip:056004#172.20.1.2:5060;ob SIP/2.0
Via: SIP/2.0/UDP 0.0.0.0:5060;rport;branch=z9hG4bKPjada6202d-813b-499c-9b5c-2ad5abf6706e
From: "MI 3" <sip:056003#172.20.1.8>;tag=91efaf53-e6fb-45dc-b2d4-ddc99a6c3c36
To: <sip:056004#172.20.1.2;ob>
Contact: <sip:056003#0.0.0.0:5060>
Call-ID: 1bf35bec-1a88-468e-bd17-dfa99086c457
CSeq: 23923 INVITE
Allow: OPTIONS, REGISTER, SUBSCRIBE, NOTIFY, PUBLISH, INVITE, ACK, BYE, CANCEL, UPDATE, PRACK, MESSAGE, REFER
Supported: 100rel, timer, replaces, norefersub, histinfo
Session-Expires: 1800
Min-SE: 90
P-Asserted-Identity: "MI 3" <sip:056003#172.20.1.8>
Max-Forwards: 70
User-Agent: FPBX-15.0.23(16.16.1)
Content-Type: application/sdp
Content-Length: 231
v=0
o=- 519853527 519853527 IN IP4 172.20.1.8
s=Asterisk
c=IN IP4 172.20.1.8
t=0 0
m=audio 14490 RTP/AVP 9 101
a=rtpmap:9 G722/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=ptime:20
a=maxptime:150
a=sendrecv
--end msg--
16:52:37.918 pjsua_call.c .Incoming Request msg INVITE/cseq=23923 (rdata0x7f5f6c001c48)
16:52:37.919 pjsua_acc.c ..No available account to handle Request msg INVITE/cseq=23923 (rdata0x7f5f6c001c48)
16:52:37.919 pjsua_core.c ..TX 402 bytes Response msg 480/INVITE/cseq=23923 (tdta0x7f5f6c006b78) to UDP 172.20.1.8:5060:
SIP/2.0 480 Temporarily Unavailable
Via: SIP/2.0/UDP 0.0.0.0:5060;rport=5060;received=172.20.1.8;branch=z9hG4bKPjada6202d-813b-499c-9b5c-2ad5abf6706e
Call-ID: 1bf35bec-1a88-468e-bd17-dfa99086c457
From: "MI 3" <sip:056003#172.20.1.8>;tag=91efaf53-e6fb-45dc-b2d4-ddc99a6c3c36
To: <sip:056004#172.20.1.2;ob>;tag=z9hG4bKPjada6202d-813b-499c-9b5c-2ad5abf6706e
CSeq: 23923 INVITE
Content-Length: 0
--end msg--
16:52:37.919 pjsua_call.c ..Unable to accept incoming call (no available account)
16:52:37.921 pjsua_core.c .RX 433 bytes Request msg ACK/cseq=23923 (rdata0x7f5f6c001c48) from UDP 172.20.1.8:5060:
ACK sip:056004#172.20.1.2:5060;ob SIP/2.0
Via: SIP/2.0/UDP 0.0.0.0:5060;rport;branch=z9hG4bKPjada6202d-813b-499c-9b5c-2ad5abf6706e
From: "MI 3" <sip:056003#172.20.1.8>;tag=91efaf53-e6fb-45dc-b2d4-ddc99a6c3c36
To: <sip:056004#172.20.1.2;ob>;tag=z9hG4bKPjada6202d-813b-499c-9b5c-2ad5abf6706e
Call-ID: 1bf35bec-1a88-468e-bd17-dfa99086c457
CSeq: 23923 ACK
Max-Forwards: 70
User-Agent: FPBX-15.0.23(16.16.1)
Content-Length: 0
--end msg--
16:52:41.382 pjsua_core.c .RX 419 bytes Request msg OPTIONS/cseq=9130 (rdata0x7f5f6c001c48) from UDP 172.20.1.8:5060:
OPTIONS sip:056004#172.20.1.2:5060;ob SIP/2.0
Via: SIP/2.0/UDP 0.0.0.0:5060;rport;branch=z9hG4bKPj54cf9751-5357-4887-91d3-b8d97ea6d2f4
From: <sip:056004#172.20.1.8>;tag=9a799201-1424-418d-b5c4-44997fc40829
To: <sip:056004#172.20.1.2;ob>
Contact: <sip:056004#0.0.0.0:5060>
Call-ID: 84c421ff-ae98-475f-b11e-ac7cd27caa66
CSeq: 9130 OPTIONS
Max-Forwards: 70
User-Agent: FPBX-15.0.23(16.16.1)
Content-Length: 0
--end msg--
16:52:41.382 pjsua_core.c .TX 760 bytes Response msg 200/OPTIONS/cseq=9130 (tdta0x7f5f6c003c18) to UDP 172.20.1.8:5060:
SIP/2.0 200 OK
Via: SIP/2.0/UDP 0.0.0.0:5060;rport=5060;received=172.20.1.8;branch=z9hG4bKPj54cf9751-5357-4887-91d3-b8d97ea6d2f4
Call-ID: 84c421ff-ae98-475f-b11e-ac7cd27caa66
From: <sip:056004#172.20.1.8>;tag=9a799201-1424-418d-b5c4-44997fc40829
To: <sip:056004#172.20.1.2;ob>;tag=z9hG4bKPj54cf9751-5357-4887-91d3-b8d97ea6d2f4
CSeq: 9130 OPTIONS
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS
Accept: application/sdp, application/pidf+xml, application/xpidf+xml, application/simple-message-summary, message/sipfrag;version=2.0, application/im-iscomposing+xml, text/plain
Supported: replaces, 100rel, timer, norefersub, trickle-ice
Allow-Events: presence, message-summary, refer
Content-Length: 0
--end msg--
And not sure why it says pjsua_acc.c ..No available account to handle Request msg INVITE/cseq=23923 (rdata0x7f5f6c001c48)
Some idea? what part is bad implemented in my code? Maybe should I handle the initalise_sip_stack() function as a thread/process?
Thank you very much!

python extract few lines from the output

I've created a python class to execute a curl command which in turn generates a token. The code works as expected.The script generates the expected output.Now, need few lines from the below mentioned output and not the entire output.
How do I extract the following lines from the output.
lines starting after
Set-Cookie: SESSION= till =;
. How do I extract these lines.
import requests
import json
from akamai.edgegrid import EdgeGridAuth, EdgeRc
from tabulate import tabulate
import os
import re
import base64
class generate_token(object):
"""
This library is to generate token for the test application
"""
def __init__(self,kwargs):
self.username = 'user'
self.password = 'abcdef'
self.contractName = kwargs.get("Names")
self.contractType = kwargs.get("Type")
self.accountId = kwargs.get("Id")
self.env = kwargs.get("env")
def requestSession(self):
if self.env == "test":
ping = os.popen('ping -c 1 hostname.com').read()
ip_addr = re.findall(r"\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b",ping)[0]
else:
ping = os.popen('ping -c 1 different_hostname.com').read()
ip_addr = re.findall(r"\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b",ping)[0]
url = "https://%s/EdgeAuth/asyncUserLogin" %(ip_addr)
command = "curl -is -v -k -d username=%s -d password=%s --request POST '%s' " %(self.username,self.password,url)
self.session = os.popen(command).read()
if __name__ == "__main__":
initData = {
'Names': 'names',
'Type': 'type',
'Id': 'ID',
'env' : 'test'
}
c = generate_token(kwargs=initData)
result = c.requestSession()
Entire output :
* TCP_NODELAY set
* WARNING: disabling hostname validation also disables SNI.
> POST /EdgeAuth/asyncUserLogin HTTP/1.1
> Host: 143.111.112.202
> User-Agent: curl/7.54.0
> Accept: */*
> Content-Length: 33
> Content-Type: application/x-www-form-urlencoded
>
} [33 bytes data]
* upload completely sent off: 33 out of 33 bytes
< HTTP/1.1 302 Moved Temporarily
< Date: Thu, 26 Jul 2018 15:54:07 GMT
< Server: Apache-Coyote/1.1
< Location: https://192.168.93.201/homeng/view/main
< Content-Length: 0
< Set-Cookie: SESSION=1-7FOmRFhEcci+8fAfh+DvLg==-1bk61eksykUHbWc9kx3LzL0KdkaxyDodxsEsu6siMR/1cpR7yLaD7HtTjXEr+XDowzpYcug4bfKIMjk2/T0aqJiHg5BrbRbnBeZnTcAUIpdyKGvtnmEQkSADoaxvgfYGrxqQctrVPdqJtPziqvIbjO1X8xh0Xtj/ZNvJXaSFs//w9ISNZ5hvIDBygUo+0EuYT8PSTYVPrcBCLaJUkC8ACg==-jdN937gosTsMx8fdaJqP5sA7wKPRgqv1RxRkX65SWeE=;
Path=/; Secure
< Via: 1.1 %{HTTP_HOST}
< X-Content-Type-Options: nosniff
< Content-Type: text/plain
Required output :
17FOmRFhEcci+8fAfh+DvLg==-1bk61eksykUHbWc9kx3LzL0KdkaxyDodxsEsu6siMR/1cpR7yLaD7HtTjXEr+XDowzpYcug4bfKIMjk2/T0aqJiHg5BrbRbnBeZnTcAUIpdyKGvtnmEQkSADoaxvgfYGrxqQctrVPdqJtPziqvIbjO1X8xh0Xtj/ZNvJXaSFs//w9ISNZ5hvIDBygUo+0EuYT8PSTYVPrcBCLaJUkC8ACg==-jdN937gosTsMx8fdaJqP5sA7wKPRgqv1RxRkX65SWeE=;

Don't use os.popen and friends to execute external programs - use the subprocess module for that:
ping = subprocess.check_output(['ping', '-c', '1', 'hostname.com'])
In the same way, don't execute a subprocess just to get a cookie from a url - you're already importing the excellent requests library in your code, why not use it!
r = requests.post(url, data={'username': self.username, 'password': self.password})
print (r.cookies['SESSION'])

Python HTTP/1.1 400 Bad Request. Easy textbook example

Do you know what is going on?
With this code...
import socket
mysock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
mysock.connect(('www.py4inf.com', 80))
mysock.send('GET http://www.py4inf.com/code/romeo.txt HTTP/1.0\n\n')
while True:
data = mysock.recv(512)
if ( len(data) < 1 ) :
break
print data;
mysock.close()
I get the correct answer:
%run "c:\users\miguel~1\appdata\local\temp\tmp6uahvi.py"
HTTP/1.1 200 OK
Content-Type: text/plain
Content-Length: 167
Connection: close
Date: Tue, 30 Aug 2016 14:20:52 GMT
Server: Apache
Last-Modified: Fri, 04 Dec 2015 19:05:04 GMT
ETag: "a7-526172f5b5d89"
Accept-Ranges: bytes
Cache-Control: max-age=604800, public
Access-Control-Allow-Origin: *
Access-Control-Allow-Headers: origin, x-requested-with, content-type
Access-Control-Allow-Methods: GET
[... Some random text ...]
The exercise now says to modify the example to be able to connect to pythonlearn.com and read a text file. I don't understand why I get a Bad Request error now...
import socket
mysock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
mysock.connect(('www.pythonlearn.com', 80))
mysock.send('GET http://www.pythonlearn.com/code/intro-short.txt HTTP/1.0\n\n')
while True:
data = mysock.recv(512)
if ( len(data) < 1 ) :
break
print data;
mysock.close()
I get a HTTP/1.1 400 Bad Request
HTTP/1.1 400 Bad Request
Date: Tue, 30 Aug 2016 14:31:19 GMT
Connection: close
Set-Cookie: __cfduid=d8fbb6ce8ae7a7163f9bcdb6ffd3c7c681472567479; expires=Wed, 30-Aug-17 14:31:19 GMT; path=/; domain=.pythonlearn.com; HttpOnly
Server: cloudflare-nginx
CF-RAY: 2da8f21c332550fe-MIA
Why? Thanks!

Python MJPEG stream don't work outside VLC

I'm creating a streaming mjpeg from some IP cameras,the streaming with VLC works perfectly, just do not work inside a web page and other enterprise devices where other MJPEG streams taken from the internet work perfectly
here is my code:
class Streamer(Thread):
def __init__(self, *args, **kwargs):
self.container = kwargs.pop("container", None)
# self.q = kwargs.pop("queue", None)
# self.stream = kwargs.pop("stream", None)
super(Streamer, self).__init__(*args, **kwargs)
def run(self):
try:
print("dichiarazione handler")
server = ThreadedHTTPServer(('192.168.1.182', 8080), HandlerArguments(self.container))
print('started httpserver...')
server.serve_forever()
except KeyboardInterrupt:
print('^C received, shutting down server')
server.socket.close()
def HandlerArguments(init_args):
class MyHandler(BaseHTTPRequestHandler):
def __init__(self, *args, **kwargs):
self.container = init_args
super(MyHandler, self).__init__(*args, **kwargs)
def do_GET(self):
print("GET")
if self.path.endswith('.mjpeg'):
self.container.stream = True
self.send_response(200)
self.send_header('Pragma:', 'no-cache')
self.send_header('Cache-Control:', 'no-cache')
self.send_header('Content-type:', 'multipart/x-mixed-replace;boundary=--myboundary')
self.end_headers()
try:
while self.container.stream == True:
# print(self.queue.qsize())
print("ciclo")
img = self.container.finalq.get()
ret, img_jpg = cv2.imencode(".jpeg", img, (cv2.IMWRITE_JPEG_QUALITY, 90))
self.wfile.write('--myboundary'.encode('utf-8'))
self.send_header('Content-type:','image/jpeg')
# self.send_header('Content-length:', str(len(img_jpg)))
self.end_headers()
img_str = img_jpg.tostring()
self.wfile.write(img_str)
# self.wfile.write('--myboundary\r\n'.encode('utf-8'))
# self.send_response(200)
# time.sleep(0.05)
except:
self.container.stream = False
while not self.container.finalq.empty():
self.container.finalq.get()
elif self.path.endswith('.jpg'):
self.send_response(200)
self.send_header('Pragma:', 'no-cache')
self.send_header('Cache-Control:', 'no-cache')
self.send_header('Content-type:','image/jpeg')
self.end_headers()
img = self.container.finalq.get()
ret, img_jpg = cv2.imencode(".jpeg", img, (cv2.IMWRITE_JPEG_QUALITY, 90))
# self.send_header('Content-length:', str(len(img_jpg)))
img_str = img_jpg.tostring()
self.wfile.write(img_str)
return MyHandler
class ThreadedHTTPServer(ThreadingMixIn, HTTPServer):
#class ThreadedHTTPServer(HTTPServer):
"""Handle requests in a separate thread."""
I think the problem is in the request header, in particular this is a stream taken from the internet compared with my stream
curl -I http://85.90.40.19/mjpg/video.mjpg
HTTP/1.0 200 OK
Cache-Control: no-cache
Pragma: no-cache
Expires: Thu, 01 Dec 1994 16:00:00 GMT
Connection: close
Content-Type: multipart/x-mixed-replace; boundary=--myboundary
///////
curl -I http://192.168.1.182:8080/stream.mjpeg
HTTP/1.0 501 Unsupported method ('HEAD')
Server: BaseHTTP/0.6 Python/3.4.0
Date: Mon, 20 Jul 2015 10:00:54 GMT
Content-Type: text/html;charset=utf-8
Connection: close
Content-Length: 474
Especially in my request i see:
Content-Type: text/html;charset=utf-8
while in my code i run
self.send_header('Content-type:','image/jpeg')
Thanks in advance guys :)

curl -I sends a HTTP HEAD request.
In your code you're handling only the HTTP GET requests:
def do_GET(self):
See the error message: HTTP/1.0 501 Unsupported method ('HEAD')
Handle HEAD requests too:
def do_HEAD(self):
and output the expected headers since the clients may issue a HEAD before a GET.

Making HTTP HEAD request with urllib2 from Python 2

I'm trying to do a HEAD request of a page using Python 2.
I am trying
import misc_urllib2
.....
opender = urllib2.build_opener([misc_urllib2.MyHTTPRedirectHandler(), misc_urllib2.HeadRequest()])
with misc_urllib2.py containing
class HeadRequest(urllib2.Request):
def get_method(self):
return "HEAD"
class MyHTTPRedirectHandler(urllib2.HTTPRedirectHandler):
def __init__ (self):
self.redirects = []
def http_error_301(self, req, fp, code, msg, headers):
result = urllib2.HTTPRedirectHandler.http_error_301(
self, req, fp, code, msg, headers)
result.redirect_code = code
return result
http_error_302 = http_error_303 = http_error_307 = http_error_301
But I am getting
TypeError: __init__() takes at least 2 arguments (1 given)
If I just do
opender = urllib2.build_opener(misc_urllib2.MyHTTPRedirectHandler())
then it works fine

This works just fine:
import urllib2
request = urllib2.Request('http://localhost:8080')
request.get_method = lambda : 'HEAD'
response = urllib2.urlopen(request)
print response.info()
Tested with quick and dirty HTTPd hacked in python:
Server: BaseHTTP/0.3 Python/2.6.6
Date: Sun, 12 Dec 2010 11:52:33 GMT
Content-type: text/html
X-REQUEST_METHOD: HEAD
I've added a custom header field X-REQUEST_METHOD to show it works :)
Here is HTTPd log:
Sun Dec 12 12:52:28 2010 Server Starts - localhost:8080
localhost.localdomain - - [12/Dec/2010 12:52:33] "HEAD / HTTP/1.1" 200 -
Edit: there is also httplib2
import httplib2
h = httplib2.Http()
resp = h.request("http://www.google.com", 'HEAD')

Try httplib
>>> import httplib
>>> conn = httplib.HTTPConnection("www.google.com")
>>> conn.request("HEAD", "/index.html")
>>> res = conn.getresponse()
>>> print res.status, res.reason
200 OK
>>> print res.getheaders()
[('content-length', '0'), ('expires', '-1'), ('server', 'gws'), ('cache-control', 'private, max-age=0'), ('date', 'Sat, 20 Sep 2008 06:43:36 GMT'), ('content-type', 'text/html; charset=ISO-8859-1')]
See How do you send a HEAD HTTP request in Python 2?

The problem lies with your class HeadRequest, which inherits from urllib2.Request. According to doc, urllib2.Request.__init__ signature is
__init__(self, url, data=None, headers={}, origin_req_host=None, unverifiable=False)
so you must pass an url argument to it. In your second try, you just do not use HeadRequest, this is why it works.

you shoud not add HeadRequest to build_opener or add_handler it should be called like this
opener = urllib2.build_opener(MyHTTPRedirectHandler)
response = opener.open(HeadRequest(url))
print response.getheaders()