facebook-graph-api Display Facebook feed, data on your website Getting FaceBook Access Token to read and write to the Facebook social graph

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Example

This document details the steps to obtain the facebook access tokens and the using the tokens to fetch FB feeds.

Example: A live example is available in

https://newtonjoshua.com

Introduction to Graph API: The Graph API is the primary way to get data in and out of Facebook's platform. It's a low-level HTTP-based API that you can use to query data, post new stories, manage ads, upload photos and a variety of other tasks that an app might need to do.

FaceBook Apps:

https://developers.facebook.com

Create a Facebook app. You will get an App_Id and App_Secret

Graph API Explorer:

https://developers.facebook.com/tools/explorer/{{App_Id}}/?method=GET&path=me%2Ffeed&version=v2.8

You will get an access_token which is short lived. So this will be our short_lived_access_token.

note: while creating access token select all the fb fields that you require.This will give permission to the access token to fetch those fields.

Access Token Extension:

https://graph.facebook.com/oauth/access_token?grant_type=fb_exchange_token&client_id={{App_Id}}&client_secret={{App_Secret}}&fb_exchange_token={{short-lived-access_token}}

You will get an access_token with a validity of 2 months.

Access Token Debugger:

https://developers.facebook.com/tools/debug/accesstoken?q={{access_token}}&version=v2.8

you can check check the details of the access_token.

Facebook SDK for JavaScript: Include the below JavaScript in your HTML to asynchronously load the SDK into your page

<script>
        (function (d, s, id) {
            var js, fjs = d.getElementsByTagName(s)[0];
            if (d.getElementById(id)) {
                return;
            }
            js = d.createElement(s);
            js.id = id;
            js.src = "//connect.facebook.net/en_US/sdk.js";
            fjs.parentNode.insertBefore(js, fjs);
        }(document, 'script', 'facebook-jssdk'));
    </script>

Graph API: Let's make an API call to get our FB id, profile pic, cover pic and feeds.

<script>
window.fbAsyncInit = function () {
    FB.init({
        appId: '{{App_Id }}',
        xfbml: true,
        version: 'v2.7'
    });
    FB.api(
        '/me',
        'GET', {
            fields: 'id,picture{url},cover,feed',
            access_token: {{access_token}}
        },
        function (response) {
        if (response.error) {
                console.error(response.error.message);
            }
            if (response.picture.data.url) {
                profilePic = response.picture.data.url;
            }
            if (response.cover.source) {
                coverPic = response.cover.source;
            }
            if (response.feed.data) {
        feeds = response.feed.data;
                feeds.forEach(function (feed) {
            // view each feed content
                });
            }
            if (response.feed.paging.next) {
                nextFeedPage = response.feed.paging.next;
        // a request to nextFeedPage will give the next set of feeds
            }
            
        }
    );
};

</script>

Use the Graph API Explorer to design your querry that should be entered in the 'fields' (eg: 'id,picture{url},cover,feed')

Now you can fetch your facebook data from Facebook Graph API using your access_token. refer https://developers.facebook.com/docs/graph-api/overview/

note: Your access_token will expire in 2 months. Create a new access_token after that.



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