Having problems gaining access to a users photo's from my Facebook app.
I request the apps token at runtime using: (replacing the values in [] brackets with actual values.
https://graph.facebook.com/oauth/access_token?client_id=[clientid]&client_secret=[clientsecret]&grant_type=client_credentials
I then try to access a users photo using that access token, ie:
https://graph.facebook.com/fql?q=SELECT pid, src_big, src_small FROM photo WHERE pid IN('4313357036026642248','4313357036026642249','4313357036026642250','4313357036026642251','4313357036026642252','4313357036026642253','4313357036026642254')
The user has authenticated themselves with my app and accepted the USER_PHOTO permissions.
However I get 0 results back. I do get results back when I use that users access token rather than the app token.
I have proven this issue on the graph explorer:
https://developers.facebook.com/tools/explorer?method=GET&path=1004281695
Anyone got any ideas why an app that has been granted access to a user photos cannot get those photos using the app access token ?
Thanks in advance, Rhys
Because with very few exceptions, you can only access a user's data using a valid access token for that user (or one of their friends, depending on the privacy of the object in question).
In this case, use the user's access token, the app access token is for acting on behalf of the app and shouldn't really be used for user-specific calls, as it won't be able to see non-public information except with very limited circumstances
Related
I am using PHP for accessing Facebook friends location. I want to access location of all friends. I read that it requires "access tokens" to get client's public information from here
https://developers.facebook.com/docs/facebook-login/access-tokens#apptokens
and here
https://www.sammyk.me/access-token-handling-best-practices-in-facebook-php-sdk-v4
Is that token will be provided by Facebook at that instant of time or my app needs to wait till friend's approval.
I saw this post on stack overflow: How to get user access token?
But i still i can't figure out what if friend is offline. How that token will be passed to my application?
Or is it like that "Tokens are generated by Facebook at time when my application made the request but i can only access the user information later using the same token if he has given permission (when he gets logged in)".?
I am unable to find any explanation regarding this.
Thanks.
You can´t get the location of friends at all. Friend permissions have been removed for privacy reasons, you can only get data of users who authorized your App too. Check out the changelog for more information: https://developers.facebook.com/docs/apps/changelog
That being said, there are different Access Tokens. You can get an App Token without authorization, but you need to implement an authorization process for User or Page Tokens.
More information:
https://developers.facebook.com/docs/facebook-login/access-tokens
http://www.devils-heaven.com/facebook-access-tokens/
I don't understand something important about permissions and how to grant them. I've made a Facebook page, and I've made an app. I would like the app to be able to post to the page.
Below is my code. I'm using the fb_graph ruby gem, btw (https://github.com/nov/fb_graph)
app = FbGraph::Application.new('531508086900000000', :secret => 'd705fda7275125913a10000000000')
token = app.get_access_token
page = FbGraph::Page.new('000000000000000')
note = page.note!( :access_token => token, :subject => 'testing', :message => 'Hey, testing you!')
And this is the error:
FbGraph::Unauthorized: OAuthException :: (#200) Requires extended permission: publish_actions
I've looked everywhere I can think of on both the app and the page settings but can't figure out how to do this. Help appreciated!
You need to grant access via a user access token.
The current token in your case is an application access token.
Use one of the methods listed at https://developers.facebook.com/docs/facebook-login/permissions/v2.1#adding
Specifically https://developers.facebook.com/docs/facebook-login/manually-build-a-login-flow/v2.1#login
I voted up phwd's answer for the help s/he was to me here and in IRC. But it still wasn't really enough information to make sense of why this is so hard. I've decided to post my current working understanding of how this works. These are just my own notes, so I'm sorry in advance for anything unintelligible.
So, getting the right access tokens is f***ing hard, and here's my current understanding:
In order to get a token that last forever so that my app can post to a page I have to do this:
1. Create a short-lived user access token with the right scope for the app (manage_pages, publish_actions) using the explorer
- page access tokens can be obtained via /me/accounts from the explorer page
- if the user access token that is "live" during the /me/accounts request is short lived then this page access token will be too
- if it is an extended long-lived token the page access token will have no expiry according to https://developers.facebook.com/docs/facebook-login/access-tokens
2. Extend short-lived user access token to a long-lived one via a graph api call, also using exploer (see below)
3. Execute the /me/accounts call to get a page token that doesn't expire
How to get a long lived user access token
oauth/access_token?grant_type=fb_exchange_token&client_id=531------------&client_secret=e005f031ba3d98------------------&fb_exchange_token=CAAHjZA163IbMBAMKSeFTmeV9------------------------------------------------------------------------------------------------------------------------------------------------fonA4P4bPhhdveMLvZBKldEGCB7EvF301wQv1YPrudy5kvI
where
client_id = App Id
&client_secret = App Secret
&fb_exchange_token = short lived user access token via explorer with proper scope
This gives you the following long lived access token
access_token=CAAHjZA163Ib---------------------------------------------------------------------------------------------------------------------------------------------------------------------ehS8g2ZBYU8uZBPmdMay3AAj5tXgAZDZD&expires=5179843
This is an extended user access_token
This token can be used to post to the page it was genrated for.
It can also be used to get a no-expiry page access token when used to issue /me/accounts
from facebook :
Page Access Token
These access tokens are similar to user access tokens, except that they provide permission to APIs that read, write or modify the data belonging to a Facebook Page. To obtain a page access token you need to start by obtaining a user access token and asking for the manage_pages permission. Once you have the user access token you then get the page access token via the Graph API.
The application which I am building maps a user_id to multiple facebook accounts. I have access tokens for each of these mapped accounts and everything works nicely. There is a problem, though, when one of these access tokens expires but the user is logged in to Facebook as a different user than the one to whom the expired access token belongs.
I read all there is about obtaining a new access token for the currently logged in user but I found nothing about the case when the user whose access token expired is not logged in to Facebook.
I would appreciate your thoughts and possible solutions.
Users can't have multiple Facebook accounts, so that part of your question doesn't entirely make sense, but in general, if an access token expires you need the user to come back to your app and go through the Authentication flow again, which will give you a new access token for that user
I believe the only way to get an updated access token would be to go through the whole authentication process again from the initial login screen.
Depending on the technology with which you're building your application, the only way I can imagine you'd handle logging in to a Facebook account without logging out of an existing one is to set up parallel instances of web browsers, so long as they don't share things like cookies.
I have some C# code that retrieves an access token using Facebook.JsonObject and can post to my profile wall on facebook with no problems.
However, if I try to use that same access token to retrieve details of my facebook business pages so I can post to them, then I get the message "user access token is required to request this resource".
I thought the access token I had retrieved that allowed me to post to my profile was a user access token. What is the difference, and how do I get a user access token?
This is the code I am using to get the access token:
facebook.JsonObject AuthResult = (Facebook.JsonObject)Oauth.GetApplicationAccessToken(parameters);
object Access_Token = "";
AuthResult.TryGetValue("access_token", out Access_Token);
FacebookClient FBClient = new FacebookClient(Access_Token.ToString());
More information:
I need my customer's c# application to post directly to my customer's facebook business page via code without the application "allow access" box popping up and any redirects to applicatoins taking place. Therefore I need to get the User Access Token programatically without facebook being logged in or open etc.
Any (non-sarcastic) help very gratefully received.
Thanks
I thought the access token I had retrieved that allowed me to post to my profile was a user access token.
Does that method name,
(Facebook.JsonObject)Oauth.GetApplicationAccessToken(parameters);
===========
really sound to you as if it was supposed to give back a user access token? Sorry, but to me it doesn’t …
If you are not familiar with the different types of authentication and access tokens, please read this first: https://developers.facebook.com/docs/authentication/
I'm (just?) trying to get a user's feed via the graph api. All the permissions are in place; I just need to get it to work.
I've found that, if I go into the graph api explorer, I can retrieve the feed if I pass over an access token corresponding to the user. However, if I use the application's access token, I get nothing -- it returns with an empty DATA value.
Is this right? Shouldn't the app's access token work? What's the point of having it around if it doesn't?
An App Access token is primarily used for taking actions on behalf of the app itself (e.g. banning users, changing app settings, posting games achievements, etc).
To access a user's posts you need a user access token from them (or from another user who's able to see that user's posts), and the access token needs the read_stream permission