Node.js post上的nodejs错误404(不是通过url)
每当我尝试从索引提交时,我都会收到一个错误。 我正在尝试从用户名和密码输入中获取值 这应该是处理该职位的代码:Node.js post上的nodejs错误404(不是通过url),node.js,express,Node.js,Express,每当我尝试从索引提交时,我都会收到一个错误。 我正在尝试从用户名和密码输入中获取值 这应该是处理该职位的代码: app.post('/', function(req, res){ var username=req.body.username; var password=req.body.password; res.render("the username and password you posted:" +password+username); }); 我的app.js va
app.post('/', function(req, res){
var username=req.body.username;
var password=req.body.password;
res.render("the username and password you posted:" +password+username);
});
我的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 patienten = require('./routes/patienten');
var form = require('./routes/form');
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(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use(bodyParser.json());
app.use('/', routes);
app.use('/users', users);
app.use('/patienten', patienten);
app.use('/form', form);
// catch 404 and forward to error handler
app.use(function(req, res, next) {
var err = new Error('Not Found');
err.status = 404;
next(err);
});
app.get("/", function(req, res) {
res.send("i am from /get");
});
app.get("/", function(req, res){
res.sendfile("/");
});
app.post('/', function(req, res){
var username=req.body.username;
var password=req.body.password;
res.render("the username and password you posted:" +password+username);
});
// 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;
form.js
var express = require('express');
var router = express.Router();
var mysqlModel = require('mysql-model');
var request = require('request');
var ejs = require('querystring');
/* GET home page. */
router.get('/form', function(req, res) {
res.render('form', {
title: 'EPD - Login',
});
});
module.exports = router;
form.ejs(提交页面)
您不需要定期回复客户。改用res.send()
。这就是您收到错误的原因res.render()
用于Express中的视图引擎,并将渲染视图模板发送回客户端。IEejs
在本例中是定义的视图引擎,下面的代码就是这么做的
// view engine setup
// Tells express to render from the views directory
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');
您的404
处理程序应该是您在express主文件中的倒数第二条路线,因为它是所有与您定义的路线不匹配的路线的总括,因为express自上而下通过路线。随着您的404处理程序在Express应用程序中的错误位置被定义,您应该检查可能与路由发生的冲突
您有以下路由器中间件
app.use(“/”,routes)代码>
然后接下来是下面的GET路线
app.get("/", function(req, res) {
res.send("i am from /get");
});
根据您的路由
文件的内容,可能会发生冲突,app.get()
将永远不会执行
您应按以下方式设置路线:
app.use('/', routes);
app.use('/users', users);
app.use('/patienten', patienten);
app.use('/form', form);
// If you have a GET inside your 'routes' file
// from above, then this may never get called if
// it also contains a route for GET '/'
app.get("/", function(req, res) {
console.log('I am from get');
return res.render('index');
});
// My comment from above about your GET '/' would
// also apply to this POST route
app.post('/', function(req, res){
var username=req.body.username;
var password=req.body.password;
return res.status(200).send("the username and password you posted: " + password + ' ' + username);
});
// catch 404 and forward to error handler
app.use(function(req, res, next) {
var err = new Error('Not Found');
err.status = 404;
return next(err);
});
// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
app.use(function(err, req, res, next) {
res.status(err.status || 500);
return 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);
return res.render('error', {
message: err.message,
error: {}
});
});
您还需要将form.ejs
文件中指定的HTTP方法从GET
更改为POST
这个用于处理404的中间件应该放在最后一条路线之后。否则,根据您的代码,所有点击将返回404
此外,您的表格应发送POST请求而不是GET
<form action="/" method="POST">
非常感谢,你救了我!:)
// catch 404 and forward to error handler
app.use(function(req, res, next) {
var err = new Error('Not Found');
err.status = 404;
next(err);
});
<form action="/" method="POST">
app.post('/', function(req, res){
var username=req.body.username;
var password=req.body.password;
res.send("the username and password you posted:" +password+username);
});