Question

I have a facebook login button on my website and I include data in it.
So my callback url looks like http://my.domain/callback/facebook/?my_param=my_data.

Once the user goes on the application permissions page and either accept or reject my app, it would always come back as

http://my.domain/callback/facebook/?code=code&my_param=my_data #accepted

or

http://my.domain/callback/facebook/?error=error_data&my_param=my_data #rejected

And I just noticed today that Facebook now renamed my my_param to 0 when the application is rejected. (i.e. http://my.domain/callback/facebook/?error=error_data&0=my_data)

I did not find anything in the developers.facebook.com documentation.

• Does someone know why it changed?
• What are the rules applied to rename the parameters?
• Is there any documentation about this change?

Answer 1

Bug has been fixed by facebook.

https://developers.facebook.com/bugs/292294647538649