We unify OAuth

OAuth.popup('facebook', callback)

OAuth.popup('twitter', callback)

OAuth.popup('github', callback)

...

ExAmple with facebook

Create an app on facebook

Set your API Key on OAuth.io

Add oauth.js in your header (html)

then

             OAuth.popup('facebook', function(err, res) {
                  //todo with res.access_token
             }); 

OAuthd

git clone git://github.com/oauth-io/oauthd.git

Global dependancies

 npm install -g coffee-script grunt grunt-cli forever

npm install 

 npm start

Adding OAuth provider

It can work easily with server side too

Authentication, save informations in database ...

Exchange the code against an access_token in your backend

Works with all backend langage

Create app in provider's website

&

Configure oauth.io

Generate a CSRF token

var csrf_token = secu.generateHash() 	
req.session.csrf_tokens = req.session.csrf_tokens || []
req.session.csrf_tokens.push(csrf_token)
if (req.session.csrf_tokens.length > 4)
    req.session.csrf_tokens.shift() // keep 4 tokens max
return csrf_token

Retrieve a code client

OAuth.initialize('MpnCNnhVAq_zL089ua883AevC1o')
OAuth.popup(provider, {
    "state": $scope.csrfToken
}, function(error, success) {
    if (error) {
        alert("error")
        return
    }
    UserService.signin(success.code, provider, function(data) {
        console.log(data)
        $location.path('/account')
    }, function(error) {
	alert('error:' + error)
    })
})

Exchange the code for the access_token

request.post({
    url: 'https://oauth.io/auth/access_token',
    form: {
        code: req.body.code,
        key: "YOUR_OAUTHIO_PUBLIC_KEY",
        secret: "YOUR_OAUTHIO_SECRET_KEY"
    }
}, function (e,r,body) {
    var data = JSON.parse(body),
        check = secu.check(req, data.state)

    if (check.error) {
        return res.json(check)
    }
    callback(data)
}); 

The access_token is send to callback()

Request the identity of the user

if OAuth2

request.get({
    url: this.data[provider].url,
    headers: {
        access_token: data.access_token
    },
}, function(e, r, body) {
    if (body)
        callback(JSON.parse(body))
    })
})

Request the identity of the user

if OAuth1

request.get({
    url: this.data[provider].url,
    oauth: {
        consumer_key: "XXXXXX",
        consumer_secret: "YYYYYY",        perm_token: data.oauth_token        secret_token: data.oauth_token_secret
    }
}, function(e, r, body) {
    if (body)
        callback(JSON.parse(body))
})