CODEWITHSUNDEEP
androidwebrtcapprtcdemoapprtcopenwebrtc
Casus Knacktus
Casus Knacktus

Reputation: 31

Native android app for appr.tc

Since I few weeks I'm trying to establish a websession between a native android app (https://github.com/njovy/AppRTCDemo) and a browser by using apprtc. The app worked perfectly when using appr.tc as room-server url. I already set up the apprtc project on Ubuntu and I'm able to create a conference between a browser on the Ubuntu machine and for example the browser of my mobile device. But when I try to establish the connection between the browser on ubuntu and the app I always receive the following error: 

Room IO error: java.io.IOException:
Non-200 response when requesting 
TURN server from https://
networktraversal.googleapis.com/
v1alpha/iceconfig?key=none : HTTP/
1.1 400 Bad Request

Error-Screenshot

The URL mentioned in the error message is defined in src/app_engine/constants.py (https://github.com/webrtc/apprtc/blob/master/src/app_engine/constants.py). But I have no clue what to do with it

# TODO(jansson): Remove once AppRTCDemo on iOS supports ICE_SERVER.
TURN_BASE_URL = 'https://computeengineondemand.appspot.com'
TURN_URL_TEMPLATE = '%s/turn?username=%s&key=%s'
CEOD_KEY = '4080218913'

ICE_SERVER_BASE_URL = 'https://networktraversal.googleapis.com'
ICE_SERVER_URL_TEMPLATE = '%s/v1alpha/iceconfig?key=%s'
ICE_SERVER_API_KEY = os.environ.get('ICE_SERVER_API_KEY')

CALLSTATS_PARAMS = {
  'appId': os.environ.get('CALLSTATS_APP_ID'),
  'appSecret': os.environ.get('CALLSTATS_APP_SECRET')
}

So what did I do so far? (It's almost the deployment process of apprtc https://github.com/webrtc/apprtc#deployment)

  1. Downloaded the latest verion of apprtc from git
  2. Installed npm, nodejs and grunt
  3. Building sources by using grunt build
  4. Downloaded, installed and configured collider (collider runs on rtc:8089)
    • 4.1 I had to change my main.go in workspace/src/collidermain
      from: var roomSrv = flag.String("room-server", "hxxps://appr.tc", "The origin of the room server")
      to: var roomSrv = flag.String("room-server", "hxxp://rtc", "The origin of the room server")
    • 4.2 Also changed WS_INSTANCE_HOST_KEY to colliders adresse rtc:8089 in src/app_engine/constants.py
  5. I installed CoTurn and added a turnserver.conf that looks like
    listening-port=3478
    listening-ip=192.168.178.20
    user=rtc:webrtc
    cert=/home/rtc/work/src/collider/cert/cert.pem
    pkey=/home/rtc/work/src/collider/cert/key.pem

Collider runs on 192.168.178.20:8089 (or rtc:8089) and the turnserver on 192.168.178.20:3478. Credentials defined in turnserver.conf: Username = rtc, Password = webrtc

After the setup I added the requestIceServers-Method into src/web_app/js/util.js (https://github.com/webrtc/apprtc/blob/master/src/web_app/js/util.js)

function requestIceServers(iceServerRequestUrl, iceTransports) {
  return new Promise(function(resolve, reject) {
    var servers = [{
        credential: "webrtc",
        username: "rtc",
        urls: [
          "turn:192.168.178.20:3478?transport=udp",
          "turn:192.168.178.20:3478?transport=tcp"
        ]
    }];
    resolve(servers);
  });
}

and commented out the standard method:

//function requestIceServers(iceServerRequestUrl, iceTransports) {
  //return new Promise(function(resolve, reject) {
    //sendAsyncUrlRequest('POST', iceServerRequestUrl).then(function(response) {
      //var iceServerRequestResponse = parseJSON(response);
      //if (!iceServerRequestResponse) {
        //reject(Error('Error parsing response JSON: ' + response));
        //return;
      //}
      //if (iceTransports !== '') {
        //filterIceServersUrls(iceServerRequestResponse, iceTransports);
      //}
      //trace('Retrieved ICE server information.');
      //resolve(iceServerRequestResponse.iceServers);
    //}).catch(function(error) {
      //reject(Error('ICE server request error: ' + error.message));
      //return;
    //});
  //});
//}

When I now start my GAE, my turnserver and collider 

python ~/google_appengine/dev_appserver.py ~/google_projects/apprtc-master/out/app_engine --host=0.0.0.0
sudo turnserver -a -r 192.168.178.20
$GOPATH/bin/collidermain -port=8089 -tls=false

I'm able to establish a connection between two browser clients (log from collider-terminal)

rtc@rtc:~$ $GOPATH/bin/collidermain -port=8089 -tls=false
2016/11/05 00:07:32 Starting collider: tls = false, port = 8089, room-server=http://rtc
2016/11/05 00:10:24 Created room stackoverflow
2016/11/05 00:10:24 Added client 97869213 to room stackoverflow
2016/11/05 00:10:24 Client 97869213 registered in room stackoverflow
2016/11/05 00:10:57 Added client 96368166 to room stackoverflow
2016/11/05 00:10:57 Client 96368166 registered in room stackoverflow
2016/11/05 00:10:57 Sent queued messages from 97869213 to 96368166
2016/11/05 00:11:09 Deregistered client 96368166 from room stackoverflow
2016/11/05 00:11:09 Removed client 96368166 from room stackoverflow
2016/11/05 00:11:19 Removing client 96368166 from room stackoverflow due to timeout

When I now try to connect via native app, I always receive the error mentioned above.

After investigation I found the following link on git but it didn't help me that much: https://github.com/webrtc/apprtc/issues/366

So I decided to play around with the constants.py (https://github.com/webrtc/apprtc/blob/master/src/app_engine/constants.py) and found a place where to override the Turn/Stun server

# Turn/Stun server override. This allows AppRTC to connect to turn servers
# directly rather than retrieving them from an ICE server provider.
TURN_SERVER_OVERRIDE = []
# Enable by uncomment below and comment out above, then specify turn and stun
# servers below.
#TURN_SERVER_OVERRIDE = [
#  {
#    "urls": [
#      "turn:192.168.178.20:3478?transport=udp",
#      "turn:192.168.178.20:3478?transport=tcp"
#    ],
#    "username": "rtc",
#    "credential": "webrtc"
#  },
#  {
#    "urls": [
#      "stun:stun.l.google.com:19305"
#    ]
#  }
#]

so I commented the TURN_SERVER_OVERRIDE = [] out, commented the the other lines in and filled in the IP of my turnserver and my credentials, configured in turnserver.conf

GAE is recognizing that there is a new request coming the app. It logs

INFO     2016-11-05 00:06:31,649 apprtc.py:408] Added client 50600142 in room stackoverflow, retries = 0
INFO     2016-11-05 00:06:31,650 apprtc.py:92] Applying media constraints: {'video': True, 'audio': True}
WARNING  2016-11-05 00:06:31,653 apprtc.py:136] Invalid or no value returned from memcache, using fallback: null
INFO     2016-11-05 00:06:31,653 apprtc.py:551] User 50600142 joined room stackoverflow
INFO     2016-11-05 00:06:31,653 apprtc.py:552] Room stackoverflow has state ['50600142']
INFO     2016-11-05 00:06:31,658 module.py:788] default: "POST /join/stackoverflow?wstls=false HTTP/1.1" 200 1175

but still throws the same error.

Since this doesn't do the trick aswell I tried to insert turn-server adresse into the ICE_SERVER_BASE_URL (still in constants.py)

ICE_SERVER_BASE_URL = 'https://networktraversal.googleapis.com'
ICE_SERVER_URL_TEMPLATE = '%s/v1alpha/iceconfig?key=%s'
ICE_SERVER_API_KEY = os.environ.get('ICE_SERVER_API_KEY')

Changed to

ICE_SERVER_BASE_URL = '192.168.178.20:3478'
ICE_SERVER_URL_TEMPLATE = ''
ICE_SERVER_API_KEY = os.environ.get('ICE_SERVER_API_KEY')

This changed the error to:

Connection error
Non-200 response to POST to URL:
http://rtc:8080/join/stackoverflow=wstls=false : HTTP/1.1 500 Internal 
Server Error

Error Screenshot 2

But now I'm no longer able to open the host from a browser. Therefore I guess it's might be completly wrong.

Thanks in advance!

Upvotes: 3

Views: 2635

Answers (1)

nobjta_9x_tq
nobjta_9x_tq

Reputation: 1241

set all of them to empty string:

ICE_SERVER_BASE_URL = ''
ICE_SERVER_URL_TEMPLATE = ''
ICE_SERVER_API_KEY = ''

did you set collinder url? and your turnserver should using oauth config. Check all log of: apprtc, chrome console log, turnserver log, collinder log.. for more details.

Upvotes: 0

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