[web-devel] Yesod: facebook plugin

Tue May 17 09:11:42 CEST 2011

I am currently transferring my website from using the client side flow
version of facebook to using the server side flow (with the facebookauth
helper) using Yesod and I am having issues getting the facebook plugin
working.

One of the interesting things I noticed is that the redirect_uri that Yesod
outputs for my website is
https://graph.facebook.com/oauth/authorize?client_id=
<REMOVED>&amp;redirect_uri=http%3a%2f%2flocalhost%2fauth%2fpage%2ffacebook&amp;scope=userEmail%2cuserName%2cuserPasswordHash%2cuserCountryCode%2cuserActivated"

Now the way I read this, the field in your facebook app should be
localhost/auth/page/faceboook/ however putting this gives the error that
redirect_uri is not the same as specified in the application, so I changed
this to the same as the destination route which is defined in YesodAuth
as loginDest _ = RootR (so in this case its just localhost), however when
doing this I get an error (from facebook) stating "Invalid Arguments" (I
retrieve a HTML page with the following in the body)

<body><h1>Invalid Arguments</h1><ul><li>No input found</li></ul></body>

Is there a trivial example lying around implementing simple facebook login
using Yesod
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