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#64: facebook feed update complains about img objects

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on August 27, 2009, 06:20 PM UTC   —   from   148c663fd665c53518538e093ce3c2ab_small kueda    ( 178 views )
When posting an update to Facebook through their API, were occasionally getting

Application response error img objects must have valid 'src' and 'href' attributes. You can see this because you are one of the developers of the app.
Tags: facebook API
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Facebook doesn't like % in URLs

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- 148c663fd665c53518538e093ce3c2ab_small kueda on August 27, 2009, 06:27 PM UTC

This took some time to debug: apparently Facebook doesn't like percent-encoded URLs, so if you sent it some feed template code that looks like

   1  {
   2    "body":"blah blah",
   3    "images":[{
   4      "src":"http://img.awsomeness.com/8484%2B9087453jpg",
   5      "href":"http://awsomeness.com"
   6    }],
   7  }


it will complain about the percent-encoded "+" in the img src. You can easily unescape in ruby:

   1  >> URI.unescape("http://img.awsomeness.com/8484%2B9087453jpg")
   2  => "http://img.awsomeness.com/8484+9087453jpg"
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