Refactored into it's own library.
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1a7c79fb18
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3 changed files with 262 additions and 76 deletions
209
static/authenticator.js
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209
static/authenticator.js
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(function(){
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'use strict';
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//This is how the world accesses it!
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var Auth = window.$Auth = {};
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var error;
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var expireListeners = [];
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//Init should be called before any other functions are used
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//settings: {
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// clientID: client_id for oauth request
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// redirectURI: where redirect to with the token after authorizing
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// authEndpoint: OAuth endpoint to retrieve token
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// requiredPerms: what permissions to request from the user
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//}
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Auth.init = function(settings) {
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var isValid = Auth.verifySettings(settings);
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if(!isValid) {
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console.error("authenticator($Auth) initialized with invalid settings! \
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There may be problems...");
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}
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Auth.settings = {};
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Auth.settings.clientID = settings.clientID;
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Auth.settings.redirectURI = settings.redirectURI;
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Auth.settings.authEndpoint = settings.authEndpoint;
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Auth.settings.requiredPerms = settings.requiredPerms;
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if(Auth.getToken()) {
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if(Date.now() >= Auth.getToken().expiresTime) {
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Auth.removeToken();
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} else {
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window.setTimeout(Auth.expire, Auth.getToken().expiresTime - Date.now());
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}
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}
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if(window.location.hash !== "") {
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var hashParams = Auth.parseParams(window.location.hash);
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if(hashParams.error_reason) {
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error = error_reason;
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window.location.hash = "";
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}
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if(hashParams.access_token) {
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if(hashParams.state === Auth.getState()) {
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Auth.setToken(hashParams.access_token, hashParams.expires_in);
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} else {
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console.error("Invalid state! Something fishy here. Ignoring token...");
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console.error("Our state: ", hashParams.state, " Received state: ", hashParams.state);
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}
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clearHash();
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}
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}
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return isValid;
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};
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//Used to verify a settings object for init. Also checked before each call
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//that uses the settings.
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Auth.verifySettings = function(settings) {
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return (
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settings &&
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settings.clientID &&
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settings.redirectURI &&
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settings.authEndpoint &&
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Object.prototype.toString.call(settings.requiredPerms) === '[object Array]'
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);
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};
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//Test if the current $Auth.settings are valid.
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Auth.isInit = function(){
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return Auth.verifySettings(Auth.settings);
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};
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Auth.isAuthed = function() {
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return Auth.getToken();
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};
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Auth.wasError = function() {
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return error;
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};
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//Redirect to the auth endpoint and request an implicit authorization
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// according to the current $Auth.settings.
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Auth.gotoAuth = function() {
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if(!Auth.isInit()) {
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console.error(
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"Error! Please configure with $Auth.init() before using $Auth"
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);
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}
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redirectToAuthEndpoint();
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};
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//User needs to know when things have expires so they can react to it.
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Auth.addExpireListener = function(listener) {
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expireListeners.push (listener);
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};
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Auth.removeExpireListener = function(listener) {
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expireListeners.forEach(function(element, i) {
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if(element === listener) {
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expireListeners[i] = undefined;
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}
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});
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};
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Auth.addExpireListener = function(listener) {
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expireListeners.push (listener);
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};
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Auth.removeExpireListener = function(listener) {
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expireListeners.forEach(function(element, i) {
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if(element === listener) {
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expireListeners[i] = undefined;
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}
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});
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};
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Auth.expire = function() {
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Auth.removeToken();
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expireListeners.forEach(function(listener) {
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if(typeof listener === "function") {
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listener();
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}
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});
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};
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Auth.parseParams = function(params) {
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var result = params.slice(1).split("&").reduce(function(obj, param) {
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var parsed = param.split("=");
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obj[parsed[0]] = decodeURIComponent(parsed[1]);
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return obj;
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}, {});
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return result;
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};
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Auth.encodeParams = function(paramObj) {
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return Object.keys(paramObj).map(function(key) {
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return key + "=" + encodeURIComponent(paramObj[key]);
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}).join("&");
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};
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Auth.getToken = function() {
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try {
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return JSON.parse(window.localStorage.getItem("$Auth_token"));
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} catch (e) {
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console.error("Error parsing token string from storage.")
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throw e;
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}
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};
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Auth.setToken = function(value, expires) {
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var token = {
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value: value,
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expiresTime: Date.now() + expires * 1000
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};
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window.setTimeout(Auth.expire, expires * 1000 - 60000);
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window.localStorage.setItem("$Auth_token", JSON.stringify(token));
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};
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Auth.removeToken = function() {
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window.localStorage.removeItem("$Auth_token");
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};
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Auth.getState = function() {
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if(!window.localStorage.getItem("$Auth_state")) {
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window.localStorage.setItem("$Auth_state", get15RandomSafeChars());
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}
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return window.localStorage.getItem("$Auth_state");
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};
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function redirectToAuthEndpoint(perms) {
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var payload = {
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client_id: Auth.settings.clientID,
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redirect_uri: Auth.settings.redirectURI,
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state: Auth.getState(),
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response_type: "token",
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scope: Auth.settings.requiredPerms.join(" ")
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}
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window.location = Auth.settings.authEndpoint + "?" + Auth.encodeParams(payload);
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}
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function get15RandomSafeChars() {
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var characters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_";
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var string = "";
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var numbers = [0,1,2].map(function() {
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return Math.floor(Math.random() * Math.pow(2,32));
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});
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numbers.forEach(function(num) {
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var bits = num;
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for(var i = 0; i < 5; ++i) {
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string += characters[bits & 0x3f];
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bits = bits >> 6;
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}
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});
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return string;
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}
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function clearHash() {
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if(window.history && typeof window.history.replaceState !== "undefined") {
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history.replaceState({}, "", window.location.pathname + window.location.search);
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} else {
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window.location.hash = "";
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}
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}
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})();
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@ -3,11 +3,17 @@
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<head>
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<meta charset="utf-8" />
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<title>Redundant Feed!</title>
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<script type="text/javascript" src="authenticator.js"></script>
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<script type="text/javascript" src="loadfeed.js"></script>
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</head>
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<body>
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<div id="feed">
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<div id="app">
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<div id="header">
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...loading...
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</div>
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<div id="feed">
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Your feed is empty. You must be really boring...
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</div>
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</div>
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</body>
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</html>
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@ -1,87 +1,58 @@
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(function(){
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'use strict';
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var CLIENT_ID = "1944365805820399";
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var REDIRECT_URI = "http://localhost:3000/";
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var AUTH_ENDPOINT = "https://www.facebook.com/v2.10/dialog/oauth";
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var PERMS = "user_posts";
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var token = window.localStorage.getItem("token");
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var state = window.localStorage.getItem("state");
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if (!state) {
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state = get15RandomSafeChars();
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window.localStorage.setItem("state", state);
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var AUTH_SETTINGS = {
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clientID: "1944365805820399",
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redirectURI: "http://localhost:3000/",
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authEndpoint: "https://www.facebook.com/v2.10/dialog/oauth",
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requiredPerms: ["user_posts"]
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}
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console.log("state: ", state);
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if(window.location.hash !== "") {
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var hashParams = window.location.hash.slice(1).split("&");
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hashParams = hashParams.reduce(function(obj, param) {
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var parsed = param.split("=");
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obj[parsed[0]] = decodeURIComponent(parsed[1]);
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return obj;
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}, {});
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var store = {
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status: "unauthenticated",
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userName: "",
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feed: []
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}
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if(hashParams.access_token) {
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if(hashParams.state === state) {
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token = hashParams.access_token;
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window.localStorage.setItem("token", token);
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$Auth.init(AUTH_SETTINGS);
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if(document.readyState === "loading") {
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document.addEventListener("DOMContentLoaded", onload);
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} else {
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console.log("Invalid state! Something fishy here. Ignoring token...");
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console.log("Our state: ", state, " Received state: ", hashParams.state);
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}
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}
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}
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if(!token) {
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console.log("NOT AUTHED!");
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} else {
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console.log("Probably authed!");
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onload();
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}
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document.addEventListener('DOMContentLoaded', function() {
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function onload(){
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var feed = document.getElementById("feed");
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if(!token) {
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feed.textContent = "First you need to authorize Facebook to allow me to spy you.";
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var header = document.getElementById("header");
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if(!$Auth.isAuthed()) {
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if($Auth.wasError()){
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header.textContent = "It won't work if I can't spy on you. Are you \
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sure you don't want to authorize it?";
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header.appendChild(createAuthButton("TRY AGAIN"));
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} else {
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header.textContent = "First you need to authorize Facebook to allow me \
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to spy on you.";
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header.appendChild(createAuthButton("AUTHORIZE"));
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}
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} else {
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$Auth.addExpireListener(onload);
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header.textContent = "Hello person.";
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}
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}
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function renderFeed() {
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}
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function createAuthButton(buttonText) {
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var button = document.createElement("Button");
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button.onclick = function(){redirectToAuthEndpoint(PERMS);};
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button.onclick = function(){$Auth.gotoAuth();};
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button.value = "authorize";
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button.type = "button";
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button.textContent = "AUTHORIZE";
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feed.appendChild(button);
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} else {
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feed.textContent = "Hello person.";
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button.textContent = buttonText;
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return button;
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}
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});
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function redirectToAuthEndpoint(perms) {
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var payload = {
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client_id: CLIENT_ID,
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redirect_uri: REDIRECT_URI,
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state: state,
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response_type: "token",
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scope: perms
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};
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var params = Object.keys(payload).map(function(key) {
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return key + "=" + encodeURIComponent(payload[key]);
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}).join("&");
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window.location = AUTH_ENDPOINT + "?" + params;
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}
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function get15RandomSafeChars() {
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var characters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_";
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var string = "";
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var numbers = [0,1,2].map(function() {
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return Math.floor(Math.random() * Math.pow(2,32));
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});
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numbers.forEach(function(num) {
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var bits = num;
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for(var i = 0; i < 5; ++i) {
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string += characters[bits & 0x3f];
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bits = bits >> 6;
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}
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});
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return string;
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}
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})();
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