I was reading about FB Graph API in this page. Please see the section Authorization
They say that
At a high level, you need to get an
access token for the Facebook user.
I am confused. How do i get the logeed in users access token in my website
https://developers.facebook.com/docs/reference/api/
You don't get a logged in user's access token. Once a user is authenticated, you receive an access token to be able to see/manipulate that user's data, depending on what permissions you have requested from that user.
This is well documented in the "Authentication" section of the developer documentation: https://developers.facebook.com/docs/authentication/
Related
In our web application a user grants us access to their Facebook account, which gives us their long term access token. The user then makes a choice if the integration should be for their user timeline or for a specific Facebook page that they administrate. If they pick a page then we swap out their user access token with their page access token and go on our merry way. That has been successfully live for a while.
Now I want to add some code so if you are authenticated against a page we can query for the engagements field (/me?fields=engagement) (essentially the details about like counts for the page). However, this query obviously fails if you navigate to this resource with a user access token, because there is no "engagement" field on User.
Is there some way I can query the "/me" api resource and know if it's a user or a page without parsing the error message?
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.
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 really surprise when use http://www.friend.ly site. I'm login Facebook and after go to http://www.friend.ly. I'm surprise because I don't confirm extended permission but this site can get email, address... Any ideas?
My Information
Information get from friend.ly site
They are using the Facebook Registration Plugin which basically renders an iframe from Facebook's server. Due to cross-domain browser restrictions, they can't actually access any of that data until you submit the form by clicking the register button.
If you read the section on the Graph API documentation about authorization you'll see that if they're using an OAuth 2.0 access token then they can retrieve any information that you have publicly available without your authorization. You can see the examples below.
The Graph API as such allows you to easily access all public information about an object. For example, https://graph.facebook.com/btaylor (Bret Taylor) returns all the public information about Bret. For example a user's first name, last name and profile picture are publicly available.
To get additional information about a user, you must first get their permission. At a high level, you need to get an access token for the Facebook user. After you obtain the access token for the user, you can perform authorized requests on behalf of that user by including the access token in your Graph API requests:
https://graph.facebook.com/220439?access_token=...
For example https://graph.facebook.com/btaylor?access_token=... (Bret Taylor) returns additional information about Bret Taylor.
The Graph API uses OAuth 2.0 for authorization. Please read the authentication guide which provides details of Facebook's OAuth 2.0 implementation, how to request permissions from a user and obtain an access token.
Getting an access token for a user with no extended permissions allows you to access the information that the user has made available to everyone on Facebook. If you need specific information about a user, like their email address or work history, you must ask for the specific extended permissions. The reference documentation for each Graph API object contains details about the permissions you need to access each connection and property on that object.
This quote is from the facebook documentation located here:
https://developers.facebook.com/docs/reference/api/
I am trying to publish to a user's FB account, and I have the following permissions:
* offline_access
* publish_stream
But when I try to post to the user's account, it appears that FB is asking me for an access token (which I don't have).
Does anyone know the structure of the URL to publish to a FB user's stream when you don't have an access token?
Thanks
Do an HTTP POST to /userID/feed?access_token=appID|appSecret
You need to have your app login. About 2/3rds of the way down on the authentication documentation, there are instructions on how to get a session access token for your app.
https://developers.facebook.com/docs/authentication/
Basically, just hit this url:
https://graph.facebook.com/oauth/access_token?
client_id=YOUR_APP_ID&client_secret=YOUR_APP_SECRET&
grant_type=client_credentials
And you will get back an access token you can use to post to any user's wall that your app has permission for.