为什么request.body未定义？ [英] Why is request.body undefined?
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问题描述
我有一个node-js服务器，其中包括bodyparser和所有内容：
I have a node-js server which includes bodyparser and everything:
var express = require('express');
var dbcon = require('./app/db/databaseconnection');
var bodyParser = require('body-parser');
var app = express();
var router = express.Router();
var filepath = __dirname + '/views/';
app.set('view engine', 'ejs');
app.use(express.static(__dirname + '/public'));
app.use('/', router);
app.use(bodyParser);
app.use(bodyParser.json()); // support json encoded bodies
app.use(bodyParser.urlencoded({ extended: false })); // support encoded bodies
app.use('*', (request, response) => response.render(filepath + '404', { page_name: '404' }));
// var results = dbcon.getProducts().then(results => {
// return results;
// }).catch(err => { console.log(err) })
//ejs.render(store , { results });
router.get('/', (request, response) => response.render(filepath + 'index', { page_name: 'home' }));
router.get('/store', (request, response) => {
return dbcon.getProducts().then(results => {
return response.render(filepath + 'store', { page_name: 'store', products: results });
});
});
router.get('/product', (request, response) => {
return dbcon.getProductDetails().then(results => {
return response.render(filepath + 'product', { page_name: 'product', products: results, req: request });
});
});
router.get('/purchase', (request, response) => {
return dbcon.getProductDetails().then(results => {
response.render(filepath + 'purchase', { page_name: 'purchase', products: results, req: request, res: response });
});
});
router.post('/purchase', (request, response) => {
//return dbcon.createCustomer(request.body.fname, request.body.lname, request.body.address, request.body.city, request.body.state, request.body.country, request.body.zip, request.body.phone, request.body.cardnumber, request.body.cardtype, request.body.expirationdate, request.body.securitycode, request.body.cardaddress, request.body.productID);
console.log(request.body.name);
response.redirect('/receipt');
});
router.get('/receipt', (request, response) => response.render(filepath + 'receipt', { page_name: 'receipt' }));
router.get('/about', (request, response) => response.render(filepath + 'about', { page_name: 'about' }));
router.get('/contact', (request, response) => response.render(filepath + 'contact', { page_name: 'contact' }));
router.get('/build', (request, response) => response.render(filepath + 'build/build'));
router.get('/learn', (request, response) => response.render(filepath + 'learn/learn'));
app.listen(3000, () => console.log("Server running at Port 3000"));
我还有一个ejs页面，其中包含以下形式：
I also have a ejs page which includes a form:
<!DOCTYPE html>
<html>
<head>
<title>PC Store | Purchase</title>
<% include partials/header %>
<link rel="stylesheet" link="/css/purchaseCanvas.css" />
<script src="/js/toggleCountries.js"></script>
</head>
<body>
<header>
<% include partials/navbar %>
</header>
<main>
<div class="container">
<h1 align="center">Order</h1>
<div class="orderproduct center">
<% for (var i = 0; i < products.length; i++) {
//console.log(products[i]);
if (products[i].model == req.query.product) { %>
<h4>Product: </h4>
<img src="/img/productImages/<%= products[i].image01 %>" width="100">
<h5>Brand: <%= products[i].brand %></h5>
<h5>Model: <%= products[i].model %></h5>
<h5>Series: <%= products[i].series %></h5>
<h5>Price: $<%= products[i].price %></h5>
<input type="hidden" id="productID" name="productID" value="<%= products[i].productID %>">
<hr>
<% }} %>
</div>
<form action="/purchase" method="post">
<div class="canvas">
<br><br>
<div class="center">
<input type="text" class="form-control" id="fname" name="fname" placeholder="First Name" required>
<p id="fnameError" class="errorText"></p>
</div><br>
<div class="center">
<input type="text" class="form-control" id="lname" name="lname" placeholder="Last Name" required>
<p id="lnameError" class="errorText"></p>
</div><br>
<div class="center">
<input type="text" class="form-control" id="address" name="address" placeholder="Shipping Address" required>
<p id="addressError" class="errorText"></p>
</div><br>
<div class="center">
<input type="text" class="form-control" id="city" name="city" placeholder="City" required>
<p id="cityError" class="errorText"></p>
</div><br>
<div class="center">
<select class="form-control" id="country" name="country"></select>
<p id="countryError" class="errorText"></p>
</div><br>
<div class="center">
<select class="form-control" id ="state" name="state">
<option value="-1">Select State</option>
</select>
<p id="stateError" class="errorText"></p>
</div> <br>
<script>populateCountries("country", "state");</script>
<div class="center">
<input type="text" class="form-control" id="zip" name="zip" placeholder="Zip Code" required>
<p id="zipError" class="errorText"></p>
</div><br>
<div class="center">
<input type="tel" class="form-control" id="phone" name="phone" placeholder="Phone Number" required>
<p id="phoneError" class="errorText"></p>
</div><br>
<div class="center">
<input type="text" class="form-control" id="cardnumber" name="cardnumber" placeholder="Card Number" required>
<p id="cardnumberError" class="errorText"></p>
</div><br>
<div class="center">
<select class="form-control" id="cardtype" name="cardtype">
<option value="-1">Select Card Type</option>
<option value="Visa">Visa</option>
<option value="MasterCard">MasterCard</option>
<option value="American Express">American Express</option>
<option value="Discover">Discover</option>
</select>
<p id="cardtypeError" class="errorText"></p>
</div> <br>
<div class="center">
<input type="date" class="form-control" id="expirationdate" name="expirationdate" placeholder="Expiration Date" required>
<p id="expirationdateError" class="errorText"></p>
</div><br>
<div class="center">
<input type="text" class="form-control" id="securitycode" name="securitycode" placeholder="Security Code" required>
<p id="securitycodeError" class="errorText"></p>
</div><br>
<div class="center">
<input type="text" class="form-control" id="cardaddress" name="cardaddress" placeholder="Billing Address" required>
<p id="cardaddressError" class="errorText"></p>
</div><br>
<div class="center">
<input type="submit" class="btn btn-primary" value="Order">
</div>
</div>
</form>
</div>
</main>
<footer>
<% include partials/footer %>
</footer>
</body>
</html>
从一则帖子中我读到，您可以使用request.body从输入中获取值形成。所以我尝试这样做，但是没有用。
当我执行request.body时，它表示未定义；当我尝试执行request.body.fname时，它表示错误，并且该名称不存在。有人知道可能是什么问题吗？人们说这是因为app.use的顺序引起的，但我尝试对其进行更改，但仍然无法使用。请帮忙！
From a post I read that you can use request.body to get the values from the inputs in the form. So I tried to do that but it doesn't work. When I do request.body it says undefined and when I try to do request.body.fname it says error and that name doesn't exist. Anyone know what the problem could be? People have stated that it was because of the order of app.use, but I've tried changing it and it still wouldn't work. Please Help!
推荐答案
您似乎在解析任何中间件之前都在 之前连接了路由，这可以解释您为什么这么做不要得到任何主体（通常，如果正确地将其钩住，至少会得到一个空对象）。
Looks like you are hooking up your routes before any parsing middleware, which would explain why you don't get any body (usually if it's hooked up correctly you would at least get an empty object).
app.use('/', router);
app.use(bodyParser.json()); // support json encoded bodies
app.use(bodyParser.urlencoded({ extended: false })); // support encoded bodies
需要成为
app.use(bodyParser.json()); // support json encoded bodies
app.use(bodyParser.urlencoded({ extended: false })); // support encoded bodies
app.use('/', router);
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