express 4.0x 用ejs模版，生成的app.js没有app.configure，怎么弄？
app.configure([env], callback) 当 env 和 app.get(‘env’)(也就是 process.env.NODE_ENV) 匹配时, 调用callback。保留这个方法是出于历史原因，后面列出的if语句的代码其实更加高效、直接。使用app.set()配合其它一些配置方法后,没有必要再使用这个方法。
// 所有环境 app.configure(function(){ app.set(‘title’, ‘My Application’); })
// 开发环境 app.configure(‘development’, function(){ app.set(‘db uri’, ‘localhost/dev’); })
// 只用于生产环境 app.configure(‘production’, function(){ app.set(‘db uri’, ‘n.n.n.n/prod’); })
更高效且直接的代码如下： // 所有环境 app.set(‘title’, ‘My Application’);
// 只用于开发环境 if (‘development’ == app.get(‘env’)) { app.set(‘db uri’, ‘localhost/dev’); }
// 只用于生产环境 if (‘production’ == app.get(‘env’)) { app.set(‘db uri’, ‘n.n.n.n/prod’); }
请参考我的文章“使用express4.x版和Jade模板重写《nodejs开发指南》微博实例 ” 我使用express4写的app.js var express = require(‘express’); var path = require(‘path’); var favicon = require(‘static-favicon’); var logger = require(‘morgan’); var cookieParser = require(‘cookie-parser’); var bodyParser = require(‘body-parser’); //var partials = require(‘express-partials’);用jade模板，不能使用这个中间件 var session = require(‘express-session’); var MongoStore = require(‘connect-mongo’)(session); var settings = require(’./settings’); var flash = require(‘connect-flash’); var routes = require(’./routes/index’); var users = require(’./routes/users’);
var app = express();
// view engine setup app.set(‘views’, path.join(__dirname, ‘views’)); app.set(‘view engine’, ‘jade’); //app.use(partials());
app.use(favicon()); app.use(logger(‘dev’)); app.use(bodyParser.json()); app.use(bodyParser.urlencoded());
//cookie解析的中间件 app.use(cookieParser()); app.use(express.static(path.join(__dirname, ‘public’))); app.use(flash());
//提供session支持 app.use(session({ secret: settings.cookieSecret, store: new MongoStore({ db: settings.db, }) }));
app.use(function(req, res, next){ console.log(“app.usr local”); res.locals.user = req.session.user; res.locals.post = req.session.post; var error = req.flash(‘error’); res.locals.error = error.length ? error : null;
var success = req.flash(‘success’); res.locals.success = success.length ? success : null; next(); });
app.use(’/’, routes); app.use(’/users’, users);
/// catch 404 and forward to error handler app.use(function(req, res, next) { var err = new Error(‘Not Found’); err.status = 404; next(err); });
/// error handlers
// development error handler // will print stacktrace if (app.get(‘env’) === ‘development’) { app.use(function(err, req, res, next) { res.status(err.status || 500); res.render(‘error’, { message: err.message, error: err }); }); }
// production error handler // no stacktraces leaked to user app.use(function(err, req, res, next) { res.status(err.status || 500); res.render(‘error’, { message: err.message, error: {} }); }); module.exports = app;
