iOS Client Library throws exception while extending access token- Facebook Developers

Created By

Austin Shoemaker

06/07/2012 5:01pm

Subscribers (1)

BugsiOS Client Library throws exception while extending access token

Status: Fixed
Priority: None
Updated: July 5, 2012 at 2:54pm

Latest response from Facebook

Eric Osgood

This should now be resolved. Thanks for your patience.

Status changed to Fixed · July 5, 2012 at 2:54pm

If the Facebook service returns an error string instead of a valid JSON dictionary, the client library throws an exception when invoking objectForKey: on the object.

Steps to Reproduce:

Depends on an error response from the server, so not easily reproducible. The problem is evident from code inspection though.

1. Use the Facebook iOS Client Library to authenticate a user.
2. If the server sends an invalid response, which apparently can happen, this line in Facebook.m throws an exception:
NSString* accessToken = [result objectForKey:@"access_token"];

Expected Behavior:

It should check that the result is an NSDictionary before proceeding.

Actual Behavior:

Throws an exception:
-[__NSCFString objectForKey:]: unrecognized selector sent to instance 0xf894580
Exception "NSInvalidArgumentException": -[__NSCFString objectForKey:]: unrecognized selector sent to instance 0xf894580

API/SDK:

iOS SDK

App IDs:

153426168085342 (Cooliris)

1 person can reproduce this issue by following these steps

Repro