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Editorial Team
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Asked: 2026-05-24T03:15:22+00:00

I’m building a facebook iFrame application that uses facebook comments. When a user leaves

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I’m building a facebook iFrame application that uses facebook comments. When a user leaves a comment the default action is that this comment will be posted to their wall. The wall post is something along the lines of

UserX commented on example.com
# the comment text goes here

http://example.com
apps.facebook.com

You should be able to include an image, a description, and set the link to be the title of the page (where it says http://example.com above the apps.facebook.com), but I’m having no luck getting this to work.

I thought it would grab the information from my meta tags (as long as they included the appropriate ‘og’ tags), but that isn’t working. Nor am I able to define values for title, url, image etc. in the same way that you can for normal wall posts.

Anyone have any idea how to get this working??

EDIT:

Here are the meta tags I currently am using.

<meta property="og:title" content="USERNAME'S PAGE" /> 
<meta property="og:type" content="website" /> 
<meta property="og:url" content="http://example.com"/> 
<meta property="og:image" content="http://example.com/images/wall-post.png" /> 
<meta property="og:description" content="Some description goes here." />
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1 Answer

  1. Editorial Team

    OK, after a lot of stumbling around I figured this out.

    My iFrame application requires facebook authentication before accessing the application (as I believe all facebook apps do). This means that the facebook crawlers were unable to crawl my homepage and pick up the og: meta tags.

    To solve this I first had to figure out what the facebook crawler looks like. I logged the HTTP_USER_AGENT for all requests and then used the facebook URL Linter (http://developers.facebook.com/tools/lint/) to ping my site.

    The facebook crawler identifies itself as “facebookexternalhit/1.1 (+http://www.facebook.com/externalhit_uatext.php)”

    Once I had that I was able to just add a little conditional logic to let the crawler bypass authentication and access my site. I hope this helps others.

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