用于测试目的无用中间件:Express.js控制台中未定义的内容来自何处?
module.exports = function() {
return function rankick(req, res, next) {
if (Math.random() < 0.5) {
return next('Random kick...');
}
next();
};
};
注入简单明确的应用程序:
var express = require('express'),
http = require('http'),
path = require('path')
rankick= require('./rankick'),
util = require('util');
var app = express();
app.set('port', process.env.PORT || 8080);
app.set('views', __dirname + '/views');
app.set('view engine', 'jade');
app.use(express.favicon());
app.use(express.logger('dev'));
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(express.static(path.join(__dirname, 'public')));
app.use(rankick()); // Using the middleware
if ('development' == app.get('env')) {
app.use(express.errorHandler());
}
app.use(function (req, res, next) {
res.end('Hello World!');
});
http.createServer(app).listen(app.get('port'));
当next()
被调用,有错误字符串,控制台日志undefined
其次500
错误:
undefined
GET/500 28ms
GET/200 4ms
undefined
GET/500 5ms
'require('path')'位很愚蠢。它仅用于'__dirname'行之一。可能没有必要,因为它所做的只是添加一个'/'或'\',这取决于你的操作系统,这在生产中不会改变。只是我的2c – 2013-05-13 06:47:48