FBgraph is a nodejs module that provides easy access to the facebook graph api
I created this because I wanted to access FB's graph from node.
The libraries I found, felt clunky to me, and I needed an excuse to create a node module.
All calls will return json. Facebook sometimes (on friend requests, deleting test users, access token request)
decides to just return a string or true or redirects directly to the image. I say nay-nay! Let's make it Disney, and keep things consistent!
$ npm install fbgraph
var graph = require('fbgraph');
If you get an accesstoken via some other Oauth module like everyauth ,
connect-auth or node-oauth you can just set
the access token directly. Most get calls, and pretty much all post calls will require an access_token
graph.setAccessToken(access_token); // pass it in as part of the url
graph.post(userId + "/feed?access_token=007", wallPost, function(err, res) {
// returns the post id
console.log(res); // { id: xxxxx}
});This is how you would get authenticated using only the fbgraph module.
More details below on the express app section
// get authorization url
var authUrl = graph.getOauthUrl({
"client_id": conf.client_id
, "redirect_uri": conf.redirect_uri
});
// shows dialog
res.redirect(authUrl);
// after user click, auth `code` will be set
// we'll send that and get the access token
graph.authorize({
"client_id": conf.client_id
, "redirect_uri": conf.redirect_uri
, "client_secret": conf.client_secret
, "code": req.query.code
}, function (err, facebookRes) {
res.redirect('/loggedIn');
});Facebook recommends adding the
appsecret_proof parameter to all API calls to verify that the access tokens are coming from a valid app.
You can make this happen automatically by calling graph.setAppSecret(app_secret), which will be used on
all calls to generate the appsecret_proof hash that is sent to Facebook. Make sure you also set the
access token for the user via graph.setAccessToken.
If you want to extend the expiration time of your short-living access token, you may use extendAccessToken method as it is shown below:
// extending static access token
graph.extendAccessToken({
"client_id": conf.client_id
, "client_secret": conf.client_secret
}, function (err, facebookRes) {
console.log(facebookRes);
});
// extending specific access token
graph.extendAccessToken({
"access_token": client_access_token
, "client_id": conf.client_id
, "client_secret": conf.client_secret
}, function (err, facebookRes) {
console.log(facebookRes);
});
All calls are made using the request nodejs module Why? something to do with wheels and re-invention.
Request options are directly mapped and can be set like so:
var options = {
timeout: 3000
, pool: { maxSockets: Infinity }
, headers: { connection: "keep-alive" }
};
graph
.setOptions(options)
.get("zuck", function(err, res) {
console.log(res); // { id: '4', name: 'Mark Zuckerberg'... }
});Possible options can be found on the request github page
followRedirect cannot be overriden and has a default value of false
encoding will have utf-8 as default if nothing is set
The request object is exposed as a property on graph object. So that all the request api can be accessed.
var graphObject = graph
.get("zuck", function(err, res) {
console.log(res); // { id: '4', name: 'Mark Zuckerberg'... }
});
// abort the request.
graphObject.request.abort();Pagination in Facebook is done either with a cursor or a next url to call.
To simplify the fbgraph API, it's possible to use a fully constructed URL in order to get
the next page. See the following example:
// note: you might want to prevent the callback hell :)
graph.get('likes', {limit: 2, access_token: "foobar"}, function(err, res) {
if(res.paging && res.paging.next) {
graph.get(res.paging.next, function(err, res) {
// page 2
});
}
});graph.setVersion("2.4");graph.get("zuck", function(err, res) {
console.log(res); // { id: '4', name: 'Mark Zuckerberg'... }
});params in the url
graph.get("zuck?fields=picture", function(err, res) {
console.log(res); // { picture: 'http://profile.ak.fbcdn.net/'... }
});params as an object
var params = { fields: "picture" };
graph.get("zuck", params, function(err, res) {
console.log(res); // { picture: "http://profile.ak.fbcdn.net/..." }
});GraphApi calls that redirect directly to an image
will return a json response with relevant fields
graph.get("/zuck/picture", function(err, res) {
console.log(res); // { image: true, location: "http://profile.ak.fb..." }
});Search for public posts that contain brogramming
var searchOptions = {
q: "brogramming"
, type: "post"
};
graph.search(searchOptions, function(err, res) {
console.log(res); // {data: [{id: xxx, from: ...}, {id: xxx, from: ...}]}
});All publish requests will require an access token
only needs to be set once
graph.setAccessToken(accessToken);Post a message on the user's wall
var wallPost = {
message: "I'm gonna come at you like a spider monkey, chip!"
};
graph.post("/feed", wallPost, function(err, res) {
// returns the post id
console.log(res); // { id: xxxxx}
});To delete a graph object, provide an object id and the
response will return {data: true} or {data:false}
graph.del(postID, function(err, res) {
console.log(res); // {data:true}/{data:false}
});Batching allows you to pass instructions for several operations in a single HTTP request.
graph.batch([
{
method: "GET",
relative_url: "me" // Get the current user's profile information
},
{
method: "GET",
relative_url: "me/friends?limit=50" // Get the first 50 friends of the current user
}
], function(err, res) {
console.log(res);
// [
// {
// "code": 200,
// "headers":[
// {"name": "Content-Type", "value": "text/javascript; charset=UTF-8"}
// ],
// "body": "{\"id\":\"…\"}"
// },
// {
// "code": 200,
// "headers":[
// {"name": "Content-Type", "value": "text/javascript; charset=UTF-8"}
// ],
// "body":"{\"data\": [{…}]}"
// }
// ]
});A single FQL query is done by sending a query as a string
var query = "SELECT name FROM user WHERE uid = me()";
graph.fql(query, function(err, res) {
console.log(res); // { data: [ { name: 'Ricky Bobby' } ] }
});You can specify additional options by adding a JSON object
var query = "SELECT name FROM user WHERE uid = me()";
var options = {access_token: "foobar"};
graph.fql(query, options, function(err, res) {
console.log(res); // { data: [ { name: 'Ricky Bobby' } ] }
});FQL Multi-Queries are done by sending in an object containing the separate queries
var query = {
name: "SELECT name FROM user WHERE uid = me()"
, permissions: "SELECT email, user_about_me, user_birthday FROM permissions WHERE uid = me()"
};
graph.fql(query, function(err, res) {
console.log(res);
// { data: [
// { name: 'name', fql_result_set: [{name: 'Ricky Bobby'}] },
// { name: 'permissions', fql_result_set: [{email: 1, user_about_me: 1...}] }
// ]}
});This example assumes that you have a link on the main page / that points to /auth/facebook.
The user will click this link and get into the facebook authorization flow ( if the user hasn't already connected)
After authorizing the app the user will be redirected to /UserHasLoggedIn
/**
* Module dependencies.
*/
var express = require('express')
, graph = require('fbgraph')
, app = module.exports = express.createServer();
// this should really be in a config file!
var conf = {
client_id: 'YOUR FACEBOOK APP ID'
, client_secret: 'YOU FACEBOOK APP SECRET'
, scope: 'email, user_about_me, user_birthday, user_location, publish_stream'
, redirect_uri: 'http://localhost:3000/auth/facebook'
};
// Configuration
app.configure(function(){
app.set('views', __dirname + '/views');
app.set('view engine', 'jade');
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(app.router);
app.use(express.static(__dirname + '/public'));
});
app.configure('development', function(){
app.use(express.errorHandler({ dumpExceptions: true, showStack: true }));
});
app.configure('production', function(){
app.use(express.errorHandler());
});
// Routes
app.get('/', function(req, res){
res.render("index", { title: "click link to connect" });
});
app.get('/auth/facebook', function(req, res) {
// we don't have a code yet
// so we'll redirect to the oauth dialog
if (!req.query.code) {
var authUrl = graph.getOauthUrl({
"client_id": conf.client_id
, "redirect_uri": conf.redirect_uri
, "scope": conf.scope
});
if (!req.query.error) { //checks whether a user denied the app facebook login/permissions
res.redirect(authUrl);
} else { //req.query.error == 'access_denied'
res.send('access denied');
}
return;
}
// code is set
// we'll send that and get the access token
graph.authorize({
"client_id": conf.client_id
, "redirect_uri": conf.redirect_uri
, "client_secret": conf.client_secret
, "code": req.query.code
}, function (err, facebookRes) {
res.redirect('/UserHasLoggedIn');
});
});
// user gets sent here after being authorized
app.get('/UserHasLoggedIn', function(req, res) {
res.render("index", { title: "Logged In" });
});
var port = process.env.PORT || 3000;
app.listen(port, function() {
console.log("Express server listening on port %d", port);
});Before running the test suite, add your Facebook appId and appSecret to tests/config.js
This is needed to create test users and to get a test access_token
$ npm install
$ make test
Tests might fail if the Facebook api has an issue.
(The MIT License)
Copyright (c) 2011 Cristiano Oliveira <ocean.cris@gmail.com>
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.