trying to get app access token - facebook

Question

I tried to get an app-access-token for my facebook app with this code:
APP_ACCESS_TOKEN = FB.api(
"oauth/access_token",
{client_id: APP_ID, client_secret: APP_SECRET_CODE, redirect_uri: uri},
function(response){
console.log(response);
});
which should be like:
GET https://graph.facebook.com/oauth/access_token?
client_id=YOUR_APP_ID
&client_secret=YOUR_APP_SECRET
&redirect_uri=uri
but i get an error:
code: 1
message: "Missing authorization code"
type: "OAuthException"
What is the authorization code and how can i get it?

Answer 1

Obtaining an App Access Token
To obtain an App Access Token, invoke the following HTTP GET request:
GET https://graph.facebook.com/oauth/access_token?
client_id=YOUR_APP_ID
&client_secret=YOUR_APP_SECRET
&grant_type=client_credentials
The API will respond with a query-string formatted string of the form:
access_token=YOUR_APP_ID|YOUR_APP_ACCESS_TOKEN
Reference: http://developers.facebook.com/docs/opengraph/howtos/publishing-with-app-token/

Answer 2

https://developers.facebook.com/docs/howtos/login/login-as-app/:
“Because it requires you to include your App Secret you should not attempt to make this call client-side as that would expose this secret to all your app users. It is important that your App Secret is never shared with anyone. For this reason, this call should be performed server-side”
And for the app access token, it’s the same – you should never use it client-side, because every user could spot it there and then start using it to perform actions on behalf of your app (or change many of your app’s settings).
If you have a server-side part to your application, you can simply “build” the app access token there yourself, concatenating app id and secret with a pipe symbol, app_id|app_secret.

Answer 3

check if users of the node.js or the JAVASCRIPT.
getLongLiveToken: function(data){
FB.api('oauth/access_token', {
client_id: data.client_id, // FB_APP_ID
client_secret: data.secret, // FB_APP_SECRET
grant_type: 'fb_exchange_token',
fb_exchange_token: data.access_token // USER_TOKEN
}, function (res) {
if (!res || res.error) {
console.log(!res ? 'error occurred' : res.error);
} else {
var accessToken = res.access_token;
if(typeof accessToken != 'undefined'){}
}
});
}

Answer 4

I'm not sure that exposing the APP client secret in the code is a good idea, you can take the APP token from Facebook tool "Access Token Tool" just copy the token to your code for any use https://developers.facebook.com/tools-and-support/

Answer 5

You can also use this POST endpoint without generating the token, just be sure its being called from the server not client-side where the app_secret is exposed to public:
https://graph.facebook.com/?id={url}&scrape=true&access_token={app_id}|{app_secret}