Channel URL Facebook

Question

I'm implementing the Facebook login in my website which is in the form of mysite.anotherdomain.org. I did all explained in the Documentation of the JavaScript SDK but, since I have some problems, I'm wondering if the error comes from the channel URL.

What should I exactly write for the channel file?

Solution

The channel file basically fixes certain cross-domain issues for certain browsers. The following are the three that Facebook has identified:

Pages that include code to communicate across frames may cause Social Plugins to show up as blank without a channelUrl.

if no channelUrl is provided and a page includes auto-playing audio or video, the user may hear two streams of audio because the page has been loaded a second time in the background for cross domain communication.

a channel file will prevent inclusion of extra hits in your server-side logs. If you do not specify a channelUrl, you should remove page views containing fb_xd_bust or fb_xd_fragment parameters from your logs to ensure proper counts.

All you need inside the file is

<script src="//connect.facebook.net/en_US/all.js"></script>

You can find out more from https://developers.facebook.com/docs/reference/javascript/#channel

Comments

[ScottB]

This fixed it for me as well, though I also had to change IE to enable protected mode: IE -> Internet Options -> Security tab -> Local intranet -> (check) Enable protected mode. (assuming your site is in the local intranet)