Facebook Login

facebook.js

var page = require('webpage').create()
var system = require('system')

var clientId = '399722263402550'

var address = "https://www.facebook.com/dialog/oauth?client_id={0}&redirect_uri=https://www.facebook.com/connect/login_success.html&type=user_agent&display=touch&scope={1}"
address = address.split('{0}').join(clientId).split('{1}').join(system.args[3])

page.settings.userAgent = 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/536.6 (KHTML, like Gecko) Chrome/20.0.1092.0 Safari/536.6';

var accessTokenScript = function(){ 
	var obj = {}
	
	function isLoginPage(){
		return (document.querySelector('button[name=login]') && document.querySelector('input[name=pass]') && document.querySelector('input[name=email]'))
	}
	
	function isGrantPage(){
		return (document.querySelector('button[name=cancel_clicked]') && document.querySelector('button[name=grant_clicked]') )
	}
	
	function isErrorPage(){
		return (document.querySelector('div.abb.acr.aps'))
	}
	
	if(isLoginPage() && !isErrorPage()){

		document.querySelector('input[name=email]').value = '{0}'
		document.querySelector('input[name=pass]').value = '{1}'
		document.querySelector('button[name=login]').click()		
		obj.state = 'login'
		
	}else if(isGrantPage()){
		
		document.querySelector('button[name=grant_clicked]').click()
		
		var arr = document.querySelectorAll('button')
		for(var i = 0; i < arr.length; i++){
			if(arr[i].value == 'Allow All'){
				arr[i].click()
			}
		}
		obj.state = 'grant_access'
	}
	else{
		if(isErrorPage()){
			obj.state = 'error'
			obj.msg = document.querySelector('div.abb.acr.aps').children[0].innerHTML.toString().split('<br>')[0].split('<b>').join('') 
		}else{
			
			obj.state = 'access_token'
			var tokenInfo = window.location.toString().split('#')[1]; 
			var tokenInfoArr = tokenInfo.split('&'); 
			for(var l = 0; l < tokenInfoArr.length; l++){
				var kv=tokenInfoArr[l].split('='); 
				obj[kv[0]]=kv[1];
			}
		}
		
	}

	return JSON.stringify(obj)	
}

var script = accessTokenScript.toString()
script = script.split('{0}').join(system.args[1]).split('{1}').join(system.args[2])

page.open(address, function(status){
	if(status == 'success'){		
		var res = page.evaluate(script)
		var obj = JSON.parse(res)
		if(obj.state == 'error' || obj.state == 'access_token'){
			console.log(res)
			phantom.exit()
		}
	} else {
		console.log({state : 'error', msg : 'Network error'})
		phantom.exit()
	}	 
})