Storing facebook token for offline access

I am looking for a way to save the access token to allow the user to post on facebook without having to log in for each call to the graph API :

I require an offline_access token, i store it in the NSUserDefaults, but when i try to use it again i get a FacebookErrDomain error 10000

Here is what i do :

In the fbDidLogin i get the access_token and save it in the user defaults

- (void)fbDidLogin {
    NSString *token = self.facebook.accessToken;
    [[NSUserDefaults standardUserDefaults] setObject:token forKey:@"facebookToken"];

}

After that when i run the app again i just get the token from the user defaults, and assign them to the facebook object :

NSString *token = [[NSUserDefaults standardUserDefaults] objectForKey:@"facebookToken"];
[_facebook setAccessToken:token];

But it doesn't work..

Has anybody any idea what i could开发者_Go百科 be doing wrong ?

Thanks, Vincent.

EDIT : If i do a NSlog after [[NSUserDefaults standardUserDefaults] objectForKey:@"facebookToken"]; i can see that the token was saved.

---

I was having the same problem and I found out that the issue is you are not storing expiration date.

If you do that, it will allow you to relogin in fine.

Sample code:

 [[NSUserDefaults standardUserDefaults] setObject:_facebook.accessToken forKey:@"fb_access_token"];
 [[NSUserDefaults standardUserDefaults] setObject:_facebook.expirationDate forKey:@"fb_exp_date"];

Retrieving is the same, just set the _facebook.expirationDate.

---

Ok it seems that it's the facebook iOS SDK which is buggy.

Using the token stored in the user defaults, i can perform a post on my wall using curl :

curl -F 'access_token=br69pK_lh0Xbj....plDRUdG97a55KIHzlaiw' \
     -F 'message=TEST API.' \
     https://graph.facebook.com/ME/feed

So i just perform a HTTPS POST, so using ASIHTTPRequest this code works like a charm :

NSURL* faceboobUrl = [NSURL URLWithString:@"https://graph.facebook.com/ME/feed"];
self.request = [ASIFormDataRequest requestWithURL:faceboobUrl];
[request setRequestMethod:@"POST"];
[request setPostValue:token forKey:@"access_token"];
[request setPostValue:msg forKey:@"message"];
[request setDelegate:self];
[request setTimeOutSeconds:TIMEOUT];
[request startAsynchronous];

No thanks facebook ;)

Vincent

---

Make sure to call :

[[NSUserDefaults standardUserDefaults] synchronize];

This will "save" your preferences to disk/flash.

Also do an NSLog on the token before you save it to make sure it's not nil.