Anton Dimitrov Anton Dimitrov - 1 month ago 43
Javascript Question

LinkedIn verify user auth token server side

after 1 day of research, I've ended with the following issue. I'm building an web app with ember.js and currently I'm implementing LinkedIn login, using linkedin javascript sdk. The problem that I have is that after I recieve user information (token, email, first name and etc) I need to verify this token on server side in order to grand session. Unfortunately, the documentation is not very clear for me. I can access token ( or kind of a token ) using IN.ENV.auth, but when I try to validate one from both of them, I recieve "invalid request". On the server side I'm using node and a sample code look like that:

var request = require('request');
var options = {
url: 'https://www.linkedin.com/uas/oauth2/accessToken?grant_type=authorization_code&code=TOKEN_RECIEVED_THROUGH_IN.ENV.auth&redirect_uri=my-domain&client_id=API_CLIENT_ID&client_secret=API_SECRET_KEY'
};
request(options,function(err,res,body){
console.log(body);
});


The response from the sdk is like that:

anonymous_expires_in: 1800
anonymous_token: "4u948tas123asfK9DJx9HFYJgcsBFlhIFu93gG"
api_key: "API_KEY"
is_set_client_auth_cookie: false
member_id: "4a13sdasFeD"
oauth_expires_in: 1800
oauth_token: "66Dy9V123lL7H823ddl-5L-KVmg184k0dhAaS"


Thanks in advance.

Answer

LinkedIn auth tokens granted from the JS SDK and server-side OAuth are not the same.

There is a process documented on LinkedIn's developer website that explains how to exchange a JS token for a REST API/server-side token: https://developer-programs.linkedin.com/documents/exchange-jsapi-tokens-rest-api-oauth-tokens