NS_ERROR_UNEXPECTED in FireFox on mozRTCPeerConnec

问题:

I am using adapter.js in my webrtc 1-1 video call application. It works fine on Google Chrome and both peers see each other's video and can hear audio. However, when I run the same application on FireFox, I get the following error on console which comes from adapter.js.

NS_ERROR_UNEXPECTED

This is the function from adapter.js which gives the above error on return statement:

var RTCPeerConnection = function(pcConfig, pcConstraints) {
  // .urls is not supported in FF yet.
  maybeFixConfiguration(pcConfig);
  return new mozRTCPeerConnection(pcConfig, pcConstraints);
};

This is what is inside pcConfig:

{"iceServers":[{"url":"stun:stun.l.google.com:19302"}]}

This is what is inside pcConstraints:

{"optional":[{"DtlsSrtpKeyAgreement":true},{"RtpDataChannels":true}],"mandatory":{}}

This is how the function maybeFixConfiguration(pcConfig) looks like:

function maybeFixConfiguration(pcConfig) {
  if (pcConfig == null) {
    return;
  }
  for (var i = 0; i < pcConfig.iceServers.length; i++) {
    if (pcConfig.iceServers[i].hasOwnProperty('urls')){
      pcConfig.iceServers[i]['url'] = pcConfig.iceServers[i]['urls'];
      delete pcConfig.iceServers[i]['urls'];
    }
  }
}

I don't understand what mistake I am doing here. Is something wrong with pcConfig and pcConstraints structure. I am using the latest FireFox I downloaded today.

回答1:

This may be outdated but it may be of some help. I had the same NS_ERROR_UNEXPECTED when creating the new RTCPeerConnection(config).

My problem was that my iceServers array had an invalid urls part that was giving problems to Firefox, specifically i had urls: 'turn:someUsername@ipAddress:port'

I found out after some time that someUsername@ was not acceptable to FF although it works on Chrome.

Removing the username@ part of the string fixed the issue for me, hope it helps.

回答2:

I found the mistake, it was in how we specify the iceServers.

Correction is :

{'iceServers': [
  createIceServer(isChrome
    ? 'stun:stun.l.google.com:19302'
    : 'stun:23.21.150.121', null, null)
]}

回答3:

Update your browser. Fully qualified domain names in iceServer URLs have been supported since Firefox 22 (circa March 2013), and adapter.js does not generally cover browsers that old.

Also, note that createIceServer is no longer needed - and unavailable - in the latest version of adapter.js. There's still a polyfill in there for some changes in syntax, but it is handled transparently now, without needing to use this special function.