javascript-如何使用快速框架从Node.js中的请求中获取字段？
作者：互联网
我正在编写Node.js脚本,并且在集成“登录”表单时遇到问题.我可以使用静态HTML页面来完成此操作,但是使用动态“ .ejs”页面会导致问题…我的表单字段报告为“未定义”.
var helmet = require('helmet');
var bodyParser = require('body-parser')
//var cookieParser = require('cookie-parser');
//var csurf = require('csurf');
//Use Express module
var express = require('express');
var app = express();
var io = require("socket.io"); //web socket external module
var easyrtc = require("easyrtc"); //EasyRTC external module
app.use(helmet());
//Statically serve files in these directories
app.use("/js", express.static(__dirname + '/easyrtc/js'));
app.use("/images", express.static(__dirname + '/easyrtc/images'));
app.use("/css", express.static(__dirname + '/easyrtc/css'));
//For my homepage
app.set('views', __dirname + '/views');
app.set('view engine', 'ejs') //set the view engine to ejs
app.use("/css", express.static(__dirname + '/public/css'));
app.use("/img", express.static(__dirname + '/public/img'));
//Needed to parse form data
app.use(bodyParser());
//var csrfProtection = csurf({ cookie: true });
//parse cookies...we need this because "cookie" is true in csrfProtection
//app.use(cookieParser());
//global variables
var loggedIn = false,
password = 'password';
var title = 'This is a heading';
var message = 'Steve is NOT available';
var presenter = 'Username'
var passport = 'Password'
//Temporary home page
app.get('/', function (req, res) {
var site = req.hostname; //example returns "localhost"
var splits = site.split("."); //"split" on "periods"
console.log("site is: " + site);
console.log("first split is: " + splits[0]);
console.log("second split is: " + splits[1]);
if (loggedIn == true) {
res.render('index', {title: 'available', message: 'Steve is available...'});
console.log("homepage -logged in");
}
else {
console.log("homepage -not logged in");
res.render('login', {
usr: {},
pword: {},
data: {},
errors: {}//,
// csrfToken: req.csrfToken()
});
}
});
//Respond to POST from login form
app.post('/login', function (req, res) {
console.log('post to /login');
var usr_STR = String(req.body.usr)
var pass_STR = String(req.body.pword)
console.log("req.body.usr: " + req.body.usr + " req.body.pword: " + req.body.pword);
console.log("usr_STR: " + usr_STR + " pass_STR: " + pass_STR);
if (loggedIn == true) {
res.send("Already logged in.");
}
else {
console.log("Posted data:" + JSON.stringify(req.body));
console.log("req.body.pw:" + req.body.pw);
console.log("req.body.pword:" + req.body.pword);
console.log("req.body.usr:" + req.body.usr);
if (req.body.pword == password) {
loggedIn = true;
res.send("You are logged in.");
console.log("Logged in");
// Start EasyRTC server
var easyrtcServer = easyrtc.listen(app, socketServer);
}
else {
res.render('login', {
data: req.body, //{ presenter, passport }
errors: {
presenter: {
msg: 'Your username does not look right'
},
passport: {
msg: 'Your password does not look right'
}
}//,
// csrfToken: req.csrfToken()
});
}
}
});
//Error Handling
app.use((req, res, next) => {
res.status(404).send("Sorry can't find that!")
});
app.use((err, req, res, next) => {
console.error(err.stack)
res.status(500).send('Something broke!')
});
// Start server on port 8080
var webServer = app.listen(8080);
console.log('Listening on port ' + 80);
// Start Socket.io so it attaches itself to Express server
var socketServer = io.listen(webServer);
我看到控制台向我报告以下内容：
Posted data:{}
req.body.pword:undefined
req.body.usr:undefined
我对使用Node.J还是有点陌生,显然我对如何将参数从(.ejs)表单传递到req.body中的路由处理程序感到困惑…任何建议将不胜感激,我真的很难尝试解决这个问题.先感谢您.问候.
注意：从我的代码中可以看到,我删除了对“ csurf”和“ cookieparser”的引用,因为在我的早期运行中,此信息是在“ req.body”中返回的…所以我认为它们在某种程度上干扰了.但是,似乎还有其他情况.
这是登录表单的关联HTML：
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
<div class="form-header">
<% if (Object.keys(errors).length === 0) { %>
<h2>Login Form</h2>
<% } else { %>
<h2 class="errors-heading">Oops, please correct the following:</h2>
<ul class="errors-list">
<% Object.values(errors).forEach(error => { %>
<li><%= error.msg %></li>
<% }) %>
</ul>
<% } %>
</div>
<form method="post" action="/login" novalidate>
<div class="imgcontainer">
<img src="img_avatar2.png" alt="Avatar" class="avatar">
</div>
<div class="container">
<label for="usr"><b>Username</b></label>
<input type="text" placeholder=<%= data.presenter %> name="usr" required>
<% if (errors.presenter) { %>
<div class="error"><%= errors.presenter.msg %></div>
<% } %>
<label for="pword"><b>Password</b></label>
<input type="password" placeholder=<%= data.passport %> name="pword" required>
<% if (errors.passport) { %>
<div class="error"><%= errors.passport.msg %></div>
<% } %>
<button type="submit">Login</button>
</div>
<div class="container" style="background-color:#f1f1f1">
<button type="button" class="cancelbtn">Cancel</button>
<span class="psw">Forgot <a href="#">password?</a></span>
</div>
</form>
</body>
</html>
解决方法:
您需要使用body解析器,仅导入它是行不通的.
同时结帐body-parser docs
// configure the app to use bodyParser()
// parse urlencoded data type as JSON
app.use(bodyParser.urlencoded({
extended: true
}));
// parse various different custom JSON types as JSON
app.use(bodyParser.json({ type: 'application/*+json' }));
// parse some custom thing into a Buffer
app.use(bodyParser.raw({ type: 'application/vnd.custom-type' }));
// parse an HTML body into a string
app.use(bodyParser.text({ type: 'text/html' }));
标签：javascript,node-js,express,body-parser,ejs 来源： https://codeday.me/bug/20191013/1906222.html