Chrome中出现OpenTok accessDenied问题

问题描述

我在使用 OpenTok 2 API 。当我开始发布流并提示允许或拒绝网站使用我的摄像头和麦克风时，如果允许允许（）应该运行，但是如果拒绝拒绝（）应该运行。

I'm having some trouble with the OpenTok 2 API. When I start to publish a stream and I'm prompted to allow or deny the website to use my webcam and microphone, if I allow allowed() should run, but if I deny denied() should run.

publisher.addEventListener('accessAllowed', allowed);
publisher.addEventListener('accessDenied', denied);

function allowed() {
    console.log('Allowed');
}

function denied() {
    console.log('Denied');
}

它在Firefox中按预期工作。然而，在Chrome accessAllowed的作品中，accessDenied并没有。相反，我得到以下错误：

It works as expected in Firefox. In Chrome accessAllowed works, however, accessDenied doesn't. Instead I get the following error:

OT.Publisher.onStreamAvailableError PermissionDeniedError:
TB.exception :: title: Internal Error (2000) msg: Publisher failed to access camera/mic:

有什么想法？

推荐答案

这是OpenTok当前JS库中的一个错误。我有一个解决方法，应该让你去，当bug修复时，我会回来更新。

This is a bug in the current JS library at OpenTok. I do have a workaround that should get you going and I'll come back with an update when the bug is fixed.

var waiting = false;
publisher.addEventListener('accessAllowed', function() {
  waiting = false;
  allowed();
});
publisher.addEventListener('accessDenied', function() {
  waiting = false;
  denied();
});
publisher.addEventListener('accessDialogOpened', function() {
  waiting = true;
});
publisher.addEventListener('accessDialogClosed', function() {
  setTimeout(function() {
    if (waiting) {
      waiting = false;
      denied();
    }
  }, 0);
});

这个解决方法略有限制，因为Chrome在拒绝访问一次，然后访问页面。如果用户没有更改他/她有关媒体权限的偏好，则视频将继续被拒绝，并且'accessDialogOpened'甚至不会触发。我会通知团队并继续研究。

This workaround is slightly limited because Chrome has some weirdness when it comes to denying access once and then visiting the page again. If the user hasn't changed his/her preferences regarding the media permissions, the video will continue to be denied and the 'accessDialogOpened' won't even fire. I'll inform the team and continue to look into this.

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