无法进入Express – NodeJS
我创build一个快速项目，但我安装命令npm install模块，但是当我运行node app.js ，我不能得到富，任何人都可以帮助我吗？
错误：
Error: Failed to lookup view "error" in views directory "C:\Users\Jack\Desktop\demo\views" at EventEmitter.app.render (C:\Users\Jack\Desktop\demo\node_modules\express\lib\application.js:555:17) at ServerResponse.res.render (C:\Users\Jack\Desktop\demo\node_modules\express\lib\response.js:938:7) at C:\Users\Jack\Desktop\demo\app.js:55:7 at Layer.handle_error (C:\Users\Jack\Desktop\demo\node_modules\express\lib\router\layer.js:58:5) at trim_prefix (C:\Users\Jack\Desktop\demo\node_modules\express\lib\router\index.js:300:13) at C:\Users\Jack\Desktop\demo\node_modules\express\lib\router\index.js:270:7 at Function.proto.process_params (C:\Users\Jack\Desktop\demo\node_modules\express\lib\router\index.js:321:12) at IncomingMessage.next (C:\Users\Jack\Desktop\demo\node_modules\express\lib\router\index.js:261:10) at fn (C:\Users\Jack\Desktop\demo\node_modules\express\lib\response.js:933:25) at EventEmitter.app.render (C:\Users\Jack\Desktop\demo\node_modules\express\lib\application.js:557:14)
和app.js：
var express = require('express'); var path = require('path'); var favicon = require('serve-favicon'); var logger = require('morgan'); var cookieParser = require('cookie-parser'); var bodyParser = require('body-parser'); 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', 'ejs'); // uncomment after placing your favicon in /public //app.use(favicon(__dirname + '/public/favicon.ico')); app.use(logger('dev')); app.use(bodyParser.json()); app.use(bodyParser.urlencoded({ extended: false })); app.use(cookieParser()); app.use(express.static(path.join(__dirname, 'public'))); 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: {} }); }); app.get('/foo', function (req, res) { res.send('Hello World!'); }); module.exports = app; var port=3000; var host='localhost'; app.listen(port, host); console.log('Check url --> ' + host + ':' + port);
这里的问题是什么？ 我安装运行app.js所需的所有模块，但它不工作，PLZ帮助我，我该如何解决这个问题？
对于404 NOT FOUND：
在视图文件夹中添加thoses文件 。 它会让你有每一个错误。
而对于你/富路线，我只是看到路线是在404找不到中间件！ 这意味着它永远不会去的路线。 您应该将所有路线写入routes/文件夹的文件中
var express = require('express'); var path = require('path'); var favicon = require('serve-favicon'); var logger = require('morgan'); var cookieParser = require('cookie-parser'); var bodyParser = require('body-parser'); 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', 'ejs'); // uncomment after placing your favicon in /public //app.use(favicon(__dirname + '/public/favicon.ico')); app.use(logger('dev')); app.use(bodyParser.json()); app.use(bodyParser.urlencoded({ extended: false })); app.use(cookieParser()); app.use(express.static(path.join(__dirname, 'public'))); app.use('/', routes); app.use('/users', users); app.get('/foo', function (req, res) { res.send('Hello World!'); }); // 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; var port=3000; var host='localhost'; app.listen(port, host); console.log('Check url --> ' + host + ':' + port);
有一个缺less的错误视图，问题不是expression式，而是你正在运行的例子。
error.ejs in文件夹视图中创build一个名为error.ejs in的文件。
error.ejs
<h1><%= message %></h1> <h2><%= error.status %></h2> <pre><%= error.stack %></pre>
但是为了让你的应用程序运行完毕，创build的每个文件和文件夹体系结构都应该使用：
- 快递发电机
- MEAN.JS完整的堆栈通过MEAN.JS Yo生成器