Heroku默认使用node.js应用程序
我有一个在线运行的Heroku示例应用程序的问题，它在本地完美工作，但在Heroku上它显示这个错误：
TypeError: /app/views/index.ejs:7 5| <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=2.0, user-scalable=yes" /> 6| >> 7| <title><%= app.name %></title> 8| <link rel="stylesheet" href="stylesheets/screen.css" media="Screen" type="text/css" /> 9| <link rel="stylesheet" href="stylesheets/mobile.css" media="handheld, only screen and (max-width: 480px), only screen and (max-device-width: 480px)" type="text/css" /> 10| Cannot read property 'name' of undefined at Object.<anonymous> (eval at <anonymous> (/app/node_modules/ejs/lib/ejs.js:198:12)) at Object.<anonymous> (/app/node_modules/ejs/lib/ejs.js:200:15) at ServerResponse._render (/app/node_modules/express/lib/view.js:422:21) at ServerResponse.render (/app/node_modules/express/lib/view.js:315:17) at /app/web.js:49:11 at [object Object].me (/app/node_modules/faceplate/index.js:114:7) at /app/web.js:48:18 at /app/node_modules/faceplate/index.js:104:7 at EventEmitter.<anonymous> (/app/node_modules/faceplate/index.js:131:11) at EventEmitter.emit (events.js:70:17) 我读了一些可能是package.json依赖问题的地方，所以这里是我的package.json文件：
{ "name": "facebook-template-node", "version": "0.0.1", "description": "Template app for Heroku / Facebook integration, Node.js language", "dependencies": { "async": "0.1.18", "ejs": "0.4.3", "express": "2.4.6", "faceplate": "0.6.x" }, "engines": { "node": "0.6.x" } }
这里是web.js的代码：
var async = require('async'); var express = require('express'); var util = require('util'); // create an express webserver var app = express.createServer( express.logger(), express.static(__dirname + '/public'), express.bodyParser(), express.cookieParser(), // set this to a secret value to encrypt session cookies express.session({ secret: process.env.SESSION_SECRET || 'secret123' }), require('faceplate').middleware({ app_id: process.env.FACEBOOK_APP_ID, secret: process.env.FACEBOOK_SECRET, scope: 'user_likes,user_photos,user_photo_video_tags' }) ); // listen to the PORT given to us in the environment var port = process.env.PORT || 3000; app.listen(port, function() { console.log("Listening on " + port); }); app.dynamicHelpers({ 'host': function(req, res) { return req.headers['host']; }, 'scheme': function(req, res) { return req.headers['x-forwarded-proto'] || 'http'; }, 'url': function(req, res) { return function(path) { return app.dynamicViewHelpers.scheme(req, res) + app.dynamicViewHelpers.url_no_scheme(req, res)(path); } }, 'url_no_scheme': function(req, res) { return function(path) { return '://' + app.dynamicViewHelpers.host(req, res) + (path || ''); } }, }); function render_page(req, res) { req.facebook.app(function(err, app) { req.facebook.me(function(user) { res.render('index.ejs', { layout: false, req: req, app: app, user: user }); }); }); } function handle_facebook_request(req, res) { // if the user is logged in if (req.facebook.token) { async.parallel([ function(cb) { // query 4 friends and send them to the socket for this socket id req.facebook.get('/me/friends', { limit: 4 }, function(friends) { req.friends = friends; cb(); }); }, function(cb) { // query 16 photos and send them to the socket for this socket id req.facebook.get('/me/photos', { limit: 16 }, function(photos) { req.photos = photos; cb(); }); }, function(cb) { // query 4 likes and send them to the socket for this socket id req.facebook.get('/me/likes', { limit: 4 }, function(likes) { req.likes = likes; cb(); }); }, function(cb) { // use fql to get a list of my friends that are using this app req.facebook.fql('SELECT uid, name, is_app_user, pic_square FROM user WHERE uid in (SELECT uid2 FROM friend WHERE uid1 = me()) AND is_app_user = 1', function(result) { req.friends_using_app = result; cb(); }); } ], function() { render_page(req, res); }); } else { render_page(req, res); } } app.get('/', handle_facebook_request); app.post('/', handle_facebook_request);
你似乎正在使用res.render函数，但似乎没有通过它的应用程序对象。 我相信（除非我失去了一些东西），你需要将应用程序对象传递给渲染function。 例如：
res.render('view_name', { app: { name: 'Site_Name' } } );
另一种select，如果你在大量的视图中使用app，也是添加app对象app.locals，这会使得它在所有视图（从当前应用程序呈现）中都可用。 这可以做到：
app.locals({ app: { name: 'Site_Name' } });
然后你不需要传递应用程序到每个渲染调用，并且
res.render('view_name', {} );
应该pipe用。
这是Facebook的应用程序安全性问题，并在这里解决：
Heroku – 用Node.js创build了一个facebook应用程序，它给出了types错误
我通过在我的应用程序上禁用沙箱模式来解决这个问题。