Facebook (OAuthException) This authorization code has been used.

Hello all,

Since a few days I receive the following error when a user tries to login with the facebook plugin.

(OAuthException) This authorization code has been used.

I have found some info about this error on http://developers.facebook.com/bugs/121266004701942?browse=search_50c0a727cd8bd6850038373

Can it be fixed without code change?

Many thanks in advance,

Derck

I have same problem too. Does anyone know the cause?

As mentioned, the bug is documented here https://developers.facebook.com/bugs/121266004701942?browse=search_50c0a727cd8bd6850038373

To get the plugin working again for me, I adjusted FacebookProviderAuthorizer.cs to avoid calling GetAccessToken twice in the TranslateResponseState method.

From

 private AuthorizeState TranslateResponseState(string returnUrl, FacebookOAuthResult oAuthResult)
        {
            if (oAuthResult.IsSuccess)
            {
                var parameters = new OAuthAuthenticationParameters(Provider.SystemName)
                {
                    ExternalIdentifier = GetAccessToken(oAuthResult.Code),
                    OAuthToken = oAuthResult.Code,
                    OAuthAccessToken = GetAccessToken(oAuthResult.Code)
                };
...

To

private AuthorizeState TranslateResponseState(string returnUrl, FacebookOAuthResult oAuthResult)
        {
            if (oAuthResult.IsSuccess)
            {
                var accessToken = GetAccessToken(oAuthResult.Code);
                var parameters = new OAuthAuthenticationParameters(Provider.SystemName)
                {
                    ExternalIdentifier = accessToken,
                    OAuthToken = oAuthResult.Code,
                    OAuthAccessToken = accessToken
                };
...

Seems to fix the issue

It worked for me. Thanks

Sorry for the delay, but it also worked for me. Thanks!

Great but i have no source ... how can i fix it in an existing installation ?

Thx

I've updated the code to the code above and I still get the error. What is the error actually trying to say?

Doesn't it mess with the facebook login authentication,
I change the code as you show

first time when associate accounts in login everything is ok
but then when I try to login with my facebook again it request my again to create a nopcommerce account
It's supposed to log me in isn't it? because I already associate with an account

Best regards