I have a web-based news app that runs on Heroku. When users post a comment to a news story on my app, my app forwards the comment to the user's facebook wall using fb_graph. Everything worked perfectly until a couple of weeks ago. For no reason that I can explain I am now seeing some baffling behavior.
Now, when a user submits a comment to a story the FB API responds with, OAuthException :: (#1500) The url you supplied is invalid. If, the same user then submits additional comments to the same story those comments are posted to the user's FB feed just fine.
I have used the FB Graph API explorer to confirm that I have valid access tokens, and that my app does accept posts to the token-owner's FB feed.
To make things even more baffling, when running my web app in development on localhost all of the posts go through just fine to my development FB app.
def post_to_facebook(story, post)
auth = Authentication.find_by_provider_and_user_id("facebook", current_user.id)
if auth
me = FbGraph::User.me(auth.token)
if me.permissions.include?(:publish_stream)
begin
me.feed!(
:message => "#{best_name(current_user)} made the following post to NewsWick: #{post.contents}",
:name => story.title,
:link => "https://www.newswick.com/stories/"+story.id.to_s,
:description => "Story posted to the NewsWick world-wide news service" ,
:picture => best_photo(story)[:photo_url]
)
rescue => e
@msg = "Facebook posting error: "+ e.to_s
puts "Facebook feed posting error: #{e.message}"
end
else
@msg = "No longer authorized to post to Facebook."
end
end
return @msg
end
One last thing to note, the only thing that I have changed w/r/t how my app interacts with FB in the last two weeks was that i accepted FB's July Breaking Changes.
Anyone have any clues. This is driving me bonkers!!!
I'm having the same issue only difference is I'm using the javascript api.
Seems like it's a facebook bug, which is already reported here: https://developers.facebook.com/bugs/136768399829531