[英]Cannot get in Express - NodeJS
我创建了一个快速项目,但是我使用命令npm install
模块,但是当我运行node app.js
,我无法获取foo,有人可以帮助我吗?
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);
这是什么问题? 我安装了运行app.js所需的所有模块,但无法正常工作,请帮助我,如何解决此问题?
有一个丢失的错误视图,问题不明确,但您正在运行的示例。
error.ejs in
文件夹视图中创建一个名为error.ejs in
的文件。
error.ejs
<h1><%= message %></h1>
<h2><%= error.status %></h2>
<pre><%= error.stack %></pre>
但是要使您的应用程序完成所有工作,创建的每个文件和文件夹架构,请使用:
对于404未找到:
将这些文件添加到您的views文件夹中。 这将使您遇到所有错误。
对于您的/ foo路由,我只是看到该路由位于404找不到中间件之下! 这意味着它将永远不会去那条路线。 您应该将所有路线写在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);
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