Question

I have the following code for the like button:

<fb:like data-href="http://foobar.com/Home/View/@Model.News.Id/" send="true" width="320" show_faces="true" font=""></fb:like>

When I try to debug this in Facebook Linter. It’s failing:

Can't Download: Could not retrieve data from URL.

When I look at what Facebook returns as a response I see that it’s redirecting to authentication page.

This is a canvas app and I have to authenticate the users right. So I have it in every action within controller.

All I want to do is a like button per page which are dynamic.

How can i fix this ? any ideas?

Answer 1

FYI: https://developers.facebook.com/blog/post/407/

Enabling the Like button for canvas URLs on Facebook Based on feedback
from the developer community, we’re making it possible to like content
within an application on Facebook. Now your users can like pages
within your application just as they’ve been doing with Facebook
Pages, and other pages on the web.

The resulting News Feed story will link directly back to the
application, giving users more opportunities for liking content on
Facebook.

To implement this feature, add Open Graph protocol tags in the
of the IFramed page or the canvas endpoint. Your canvas
application’s ID will be automatically added as the fb:app_id. The
og:url automatically points to your apps.facebook.com URL, and the
og:site_name will be filled in as your application’s name.

For example, if you’re interested in gaining distribution for content
or giving users the ability to like a virtual good, add the following
pieces of the Open Graph protocol:

og:title – The title of your object og:image – An image URL which
should represent your object. The image must be at least 50px by 50px
and have a maximum aspect ratio of 3:1. If you have a real-world
object that expects to publish updates to users (e.g., a cause, movie,
product), include the og:type tag with the appropriate type. You can
verify that the Open Graph tags have been entered correctly by using
the URL Linter.

For this

Can’t Download: Could not retrieve data from URL.

You should allow linter to access the page to read the og tags. If you page is under user authentication, you should some how allow facebook

Facebook needs to scrape your page to know how to display it around
the site.

The user agent of the scraper is: “facebookexternalhit/1.1 (+http://www.facebook.com/externalhit_uatext.php)”