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POFacebook: OAuthException: This authorization code has been used
 

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  1. POFacebook: OAuthException: This authorization code has been used
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    <p><strong>Background:</strong></p> <p>I know that this question has been asked before, I have gone through all answers I have found, but it seems that no one have given a satisfying answer to it yet. I have seen that Facebook had a bug open about this but closed it due to lack of info. Thats why I ask again to see if someone out there now have found any good solution. </p> <p>I'm trying to get a short-lived access token to be able to get a users profile. This worked fine up until some time ago and now I only get "OAuthException: This authorization code has been used." back from the api call.</p> <p><strong>Technologies used:</strong></p> <ul> <li>PHP (no third part libraries or Facebook SDKs for Facebook API interaction) </li> <li>cURL </li> <li>Graph API</li> <li>https</li> </ul> <p><strong>Logical Flow</strong></p> <ol> <li><p>Get the url for the login dialogue looking similar to this:</p> <p>https://graph.facebook.com/oauth/authorize?client_id=[APP_ID]&amp;redirect_uri=[URLENCODED_REDIRECT_URI]&amp;display=popup&amp;scope=publish_stream</p></li> <li><p>Login through the Facebook login dialogue. On success redirect the user to the specified callback URI and add the "code" quersy-string variable.</p></li> <li><p>When the user is redirected to the specified callback URI it immediately try to get get a short-lived accesstoken with the "code" variable provided by the Facebook login dialogue. I do that by calling this url:</p> <p>https://graph.facebook.com/oauth/access_token?client_id=[APP_ID]&amp;redirect_uri=[URLENCODED_REDIRECT_URI]&amp;client_secret=[APP_SECRET]&amp;code=[CODE_SENT_FROM_FACEBOOK]</p></li> </ol> <p>I receive the following response EVERY TIME: {"error":{"message":"This authorization code has expired.","type":"OAuthException","code":100}}</p> <p><strong>I already know that:</strong> </p> <ol> <li>I shall get a short-lived access token</li> <li>the code is only valid for 10 minutes</li> <li>I can only use the code once (my logging confirm that I only call the access_token request just once)</li> </ol> <p>What have I missed? Why has it suddenly stopped working? Any answer, tip or trick is very appreciated! Thanks in advance. </p>
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    1. COHave you tried exchanging the short-lived token for the long-lived token and use that instead? It should just be one extra step to insert into your code.
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      1. POFacebook: OAuthException: This authorization code has been used
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    2. COyou're sure you don't have a redirect loop somewhere? That error comes when you've already used the code to get an access token or when the code has expired...Post some of your PHP maybe.
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