Apprtc with coturn STUN/TURN server - webrtc

Question

Simply, I am going run locally popular example of WEBRTC app:
github.com/webrtc/apprtc
The apprtc installed, and even works locally without turn server ( "Same origin policy" don't allow use Google TURN server, which works only from apprtc.appspot.com: access-control-allow-origin:"https://apprtc.appspot.com").
But I know that in real internet world (nats and firewalls) I need turn server. So I have decided to use own STUN/TURN server:
code.google.com/p/coturn/
I am trying integrate my apprtc with coturn:
+apprtc: http://localhost:8080/?wstls=false
+coturn: http://localhost: 3478
and I have questions:
a) Do I need execute some turnadmin commands, which are described in INSTALL guide?
Or it will be enaugh to run turnserver from example:
my_name#my_machine:~/WEBRTC/turnserver-4.4.5.2/examples/scripts/restapi$ ./secure_relay_secret.sh
which contains:
if [ -d examples ] ; then
cd examples
fi
export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/usr/local/lib/:/usr/local/mysql/lib/
export DYLD_LIBRARY_PATH=${DYLD_LIBRARY_PATH}:/usr/local/lib/:/usr/local/mysql/lib/
PATH="./bin/:../bin/:../../bin/:${PATH}" turnserver -v --syslog -a -L 127.0.0.1 -L ::1 -E 127.0.0.1 -E ::1 --max-bps=3000000 -f -m 3 --min-port=32355 --max-port=65535 --use-auth-secret --static-auth-secret=logen --realm=north.gov --cert=turn_server_cert.pem --pkey=turn_server_pkey.pem --log-file=stdout -q 100 -Q 300 --cipher-list=ALL $#
b) When I open localhost: 3478 in browser I see:
"TURN Server
use https connection for the admin session:
What uri is for rest API?
c) In rest API I need pass some parameters: username and key. Is it enough?
Will be enough to simply add extra -u switch to turnserver command? Need I some extra configurations?
e) How solve "Same origin policy"? I am not going experiment with the same ports and nginx, but simply set "access-control-allow-origin" header to turnserver response. How do it without nginx proxy? Or maby some others solutions?
d) Are some other important issues, which person running apprtc app and coturn server should know?
edit
For me the most problem was thinking that Coturn has own api method which return TURN servers - but has not. So it is requird to do it myself - on own http server. Below is example in python/django:
from hashlib import sha1
import hmac
TURN_SERVER_SECRET_KEY = 'my_pass'
def get_turn_servers(request):
if 'username' not in request.GET.keys():
return HttpResponseForbidden()
unix_timestamp_tomorrow = int(time()) + (24*60*60)
new_username = str(unix_timestamp_tomorrow)+':'+request.GET['username']
hashed = hmac.new(TURN_SERVER_SECRET_KEY, new_username, sha1)
password = hashed.digest().encode("base64").rstrip('\n')
turn_udp_uri = 'turn:%s:3478?transport=udp' % settings.DOMAIN.split(':')[0] #bez portu
turn_tcp_uri = 'turn:%s:3478?transport=tcp' % settings.DOMAIN.split(':')[0]
return JsonResponse({
'username':new_username,
'password':password,
'uris':[turn_udp_uri,
turn_tcp_uri,
]
})
Helpful will be groups:
https://groups.google.com/forum/#!forum/turn-server-project-rfc5766-turn-server
https://groups.google.com/forum/#!forum/discuss-webrtc
If sombody needs webrtc in django code, please write to me.