I am creating a web app and I need to make a call like this one:
https://graph.facebook.com/639339682906611?access_token={my_access_token_here}
When I obtain an access_token through the Graph API Explorer, it works fine. But after a while (some days I think) the token expires and I have to go to manually go to the Graph API Explorer again to renew it.
The web app requires no login for the users.
Is there a way to update my access_token automatically?
If not, is there a way to make my access_token last longer?
No, there is no way. You can only extend User or Page Tokens. Extended User Tokens are valid for 60 days, Extended Page Tokens are valid forever.
You can also try using an App Token, it is just a combination of App ID and App Secret. It is the only Token you don´t need authorization for: access_token=app_id|app_secret
More information:
https://developers.facebook.com/docs/facebook-login/access-tokens
http://www.devils-heaven.com/facebook-access-tokens/
I have this code:
$facebook->api("/oauth/access_token?grant_type=fb_exchange_token&client_id=".$facebook->getAppId()."&client_secret=".$facebook->getAppSecret()."&fb_exchange_token=".$user->getFacebookAccessToken());
it does not throw any exception, but it returns null. I am trying to extend a short-lived Facebook User Access Token to be a long-lived Facebook User Access Token. However, after I have generated a new token and calling this request while the new token was still alive, I have waited for a few hours and started a browser where I was not logged in with my facebook account. Then I have logged in with a test user (to the application, not to Facebook), but unfortunately it was directing me to the Facebook login, which means that the Facebook User Access Token was somehow invalidated.
I was working based on the doc found here.
So, can someone enlighten me how should I send the request so Facebook will really extend the token's life cycle? Also, I am not sure how can I determine whether I have successfully extended the life cycle of a Facebook User Access Token. (I am not a Facebook fan, to say the least and I am new to the Facebook API too).
Thanks, guys.
EDIT:
I have read this article and copied the setExtendedAccessToken method into my class with a few modifications to support my logic. Now the code which tries to extend the life cycle of the User Facebook Access Token is as follows:
$facebook->setExtendedAccessToken($user->getFacebookAccessToken());
Now it returns an array of two elements, the token and the expiry date. The expiry date is "5174078". I believe I am on the right track to solve this problem, am I?
Here's what I think you should be doing:
An FB user, logged in, comes to your site and you get a short-lived token for them via the client side flow in the Javascript SDK or a long-lived token via the server-side flow with the PHP or some other SDK (it appears you are doing the first of these already)
If it was a short-lived token, extend it and get a long-lived token via the API call to exchange the token (it appears you're doing this too)
Save long-lived token to your database (not sure if you're doing this)
When the user comes back to your app at some other point, logs in to your app via your own login system, but is not logged in to Facebook, you use the cached token from your database in ->setAccessToken() and then make calls to the Facebook API on their behalf
i think step 4 is your problem; I suspect you're seeing the user is logged-out of Facebook and sending them through the Facebook auth process again instead of having them log into your app via your own login mechanism, and reusing the token you stored before.
This is perfectly fine, but in that case there's no need for you to store the tokens, and you could do this all 'live' and require your users to be still logged into Facebook to fetch a new token 'live' instead of caching the token you obtained on their previous visit to your app.
Just as an FYI cause I've been stumbling around with access token for the last 45 minutes. Via facebook's documentation:
https://developers.facebook.com/docs/roadmap/completed-changes/offline-access-removal/
which seems to be a little dated, I was able to manually extend my existing short lived access token with:
https://graph.facebook.com/oauth/access_token?
client_id=APP_ID&
client_secret=APP_SECRET&
grant_type=fb_exchange_token&
fb_exchange_token=EXISTING_ACCESS_TOKEN
I go to https://developers.facebook.com/tools/explorer to get my photo in facebook, I use this code:
$json = file_get_contents('https://graph.facebook.com/me?access_token=AAAGRD7DAWfgBAEhuOpVW9OhUg8JVvylV5uA9dB7VCWP5IFfTUg6ktBZCPpsmdf3hBJtxbOsdWFzrCEwFZCMUSdKTCGBZBPdZCIuzbfoOyqW8PC8R6cZCB&fields=photos.limit(14).fields(name,source,picture,link)');
to get json, but it's always expired in 2 hours.
Is there any way to set access token never expire?
There is no way to get a user token that doesn't expire. Facebook has made this intentional so that users who forget about their installs have them automatically removed from getting access.
You can extend it to two months maximum.
See: https://developers.facebook.com/docs/howtos/login/extending-tokens/
I use the Facebook PHP SDK to log in users on my website.
I was experimenting with the "long-lived" access token that expires after 2 months instead of 2 hours. Now I can't get rid of it. It is a problem for me, since it gives me access to the graph API even when the user is logged out of Facebook. I use that to determine if a user is logged in on my site, so it becomes impossible to log out.
I have tried changing the app ID and app secret, as well as deleting my facebook and app cookies, using other accounts, but nothing helps.
How can I get the 2 hour access token back, so I can't use the graph API when the user is not logged in?
The server-side authentication flow will always give you a long-lived access token.
If you want a short-lived one, then you have to use the client-side flow (FB.login from the JavaScript SDK).
I am playing around with the Oauth 2.0 authorization in Facebook and was wondering if the access tokens Facebook passes out ever expire. If so, is there a way to request a long-life access token?
After digging around a bit, i found this. It seems to be the answer:
Updated (11/April/2018)
The token will expire after about 60 days.
The token will be refreshed once per day, for up to 90 days, when the person using your app makes a request to Facebook's servers.
All access tokens need to be renewed every 90 days with the consent of the person using your app.
Facebook change announce (10/04/2018)
Facebook updated token expiration page (10/04/2018)
offline_access:
Enables your application to perform authorized requests on behalf of the user at any time. By default, most access tokens expire after a short time period to ensure applications only make requests on behalf of the user when the are actively using the application. This permission makes the access token returned by our OAuth endpoint long-lived.
Its a permission value requested.
http://developers.facebook.com/docs/authentication/permissions
UPDATE
offline_access permission has been removed a while ago.
https://developers.facebook.com/docs/roadmap/completed-changes/offline-access-removal/
Try this may be it will help full for you
https://graph.facebook.com/oauth/authorize?
client_id=127605460617602&
scope=offline_access,read_stream,user_photos,user_videos,publish_stream&
redirect_uri=http://www.example.com/
To get lifetime Access Token you have to use scope=offline_access
Meaning of scope=offline_access is that :-
Enables your application to perform authorized requests on behalf of
the user at any time. By default, most access tokens expire after a
short time period to ensure applications only make requests on behalf
of the user when the are actively using the application. This
permission makes the access token returned by our OAuth endpoint
long-lived.
But according to facebook future upgradation the offline_acees functionality will be deprecated for forever from the 3rd October, 2012.
and the user will be given 60 days long-lived access token and before expiration of the access token Facebook will notify or you can get your custom notification functionality fetching the expiration value from the Facebook Api..
Note that Facebook is now deprecating the offline_access permission in favor of tokens for which you can request an "upgrade" to the expiry. I'm just now dealing with this, myself, so I don't have much more to say, but this doc may help:
https://developers.facebook.com/docs/offline-access-deprecation/
I came here with the same question as the OP, but the answers suggesting the use of offline_access are raising red flags for me.
Security-wise, getting offline access to a user's Facebook account is qualitatively different and far more powerful than just using Facebook for single sign on, and should not be used lightly (unless you really need it). When a user grants this permission, "the application" can examine the user's account from anywhere at any time. I put "the application" in quotes because it's actually any tool that has the credentials -- you could script up a whole suite of tools that have nothing to do with the web server that can access whatever info the user has agreed to share to those credentials.
I would not use this feature to work around a short token lifetime; that's not its intended purpose. Indeed, token lifetime itself is a security feature. I'm still looking for details about the proper usage of these tokens (Can I persist them? How do/should I secure them? Does Facebook embed the OAuth 2.0 "refresh token" inside the main one? If not, where is it and/or how do I refresh?), but I'm pretty sure offline_access isn't the right way.
Yes, they do expire. There is an 'expires' value that is passed along with the 'access_token', and from what I can tell it's about 2 hours. I've been searching, but I don't see a way to request a longer expiration time.
since i had the same problem - see the excellent post on this topic from ben biddington, who clarified all this issues with the wrong token and the right type to send for the requests.
http://benbiddington.wordpress.com/2010/04/23/facebook-graph-api-getting-access-tokens/
You can always refresh the user's access token every time the user logs into your site through facebook.
The offline access can't guarantee you get a life-long time access token, the access token changes whenever the user revoke you application access or the user changes his/her password.
Quoted from facebook http://developers.facebook.com/docs/authentication/
Note: If the application has not requested offline_access permission, the access token is time-bounded. Time-bounded access token also get invalidated when the user logs out of Facebook. If the application has obtained offline_access permission from the user, the access token does not have an expiry. However it gets invalidated whenever the user changes his/her password.
Assume you store the user's facebook uid and access token in a users table in your database,every time the user clicks on the "Login with facebook" button, you check the login statususing facebook Javascript API, and then examine the connection status from the response,if the user has connected to your site, you can then update the access token in the table.
Hit this to exchange a short living access token for a long living/non expiring(pages) one:
https://graph.facebook.com/oauth/access_token?
client_id=APP_ID&
client_secret=APP_SECRET&
grant_type=fb_exchange_token&
fb_exchange_token=EXISTING_ACCESS_TOKEN
log into facebook account and edit your application settings(account -> application setting ->additional permission of the application which use your account). uncheck the permission (Access my data when I'm not using the application(offline_access)). Then face will book issue a new token when you log in to the application.
Basic the facebook token expires about in a hour. But you can using 'exchange' token to get a long-lived token
https://developers.facebook.com/docs/facebook-login/access-tokens
GET /oauth/access_token?
grant_type=fb_exchange_token&
client_id={app-id}&
client_secret={app-secret}&
fb_exchange_token={short-lived-token}
This is a fair few years later, but the Facebook Graph API Explorer now has a little info symbol next to the access token that allows you to access the access token tool app, and extend the API token for a couple of months. Might be helpful during development.
check the following things when you interact with facebook graph api.
1) Application connect URL should be the base of your "redirect_uri"
connect URL:- www.x-minds.org/fb/connect/
redirect_uri - www.x-minds.org/fb/connect/redirect
2) Your "redirect_uri" should be same in the both case (when you request for a verification code and request for an access_token)
redirect_uri - www.x-minds.org/fb/connect/redirect
3) you should encode the the argument when you request for an access_token
4) shouldn't pass the argument (type=client_cred) when you request for an access_token. the authorization server will issue a token without session part. we can't use this token with "me" alias in graph api. This token will have length of (40) but a token with session part will have a length of(81).
An access token without session part will work with some cases
eg: -https://graph.facebook.com/?access_token=116122545078207|EyWJJYqrdgQgV1bfueck320z7MM.
But Graph API with "me" alias will work with only token with session part.
I don't know when exactly the tokens expire, but they do, otherwise there wouldn't be an option to give offline permissions.
Anyway, sometimes requiring the user to give offline permissions is an overkill. Depending on your needs, maybe it's enough that the token remains valid as long as the website is opened in the user's browser. For this there may be a simpler solution - relogging the user in periodically using an iframe: facebook auto re-login from cookie php
Worked for me...