我正在使用一个带有 cookie 的简单节点 js 图像上传器，但它没有获取 cookie。我是新手，所以需要帮助。
这里是nodejs的代码
const express = require('express');
const app = express();
const path = require('path');
const multer = require('multer');
const cors = require('cors')
const {v4:uuid} =require('uuid')
var fs = require('fs');
var dir
app.use(cors())
app.use('/uploads', express.static(path.join(__dirname, '/uploads')));
const storage = multer.diskStorage({
destination: (req, file, cb) => {
cb(null, dir);
},
filename: (req, file, cb) => {
console.log(file);
cb(null, uuid() + path.extname(file.originalname));
}
});
const fileFilter = (req, file, cb) => {
// if (file.mimetype == 'image/jpeg' || file.mimetype == 'image/png') {
cb(null, true);
// } else {
// cb(null, false);
// }
}
const upload = multer({ storage: storage, fileFilter: fileFilter });
const openDir=(req, res, next)=>{
console.log("openDir")
dir = './uploads/'+(req.uid?req.uid:"fls");
if (!fs.existsSync('./uploads')){
fs.mkdirSync('./uploads');
}
if (!fs.existsSync(dir)){
fs.mkdirSync(dir);
}
next()
}
//Upload route
app.post('/upload',openDir, upload.single('photo'), (req, res, next) => {
console.log("req.headers.cookie: ",req.headers.cookie)
var fullUrl = req.protocol + '://' + req.get('host') + dir.substring(1)+"/"+req.file.filename;
console.log(fullUrl)
if(req.file) {
res.json(fullUrl);
}
else throw 'error';
});
const PORT =process.env.PORT || 3000
app.listen(PORT, () => console.log(`Hello world app listening on port ${PORT}!`));
前端是
<!DOCTYPE html>
<html lang="en-US">
<head>
<!-- Meta setup -->
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta name="keywords" content="">
<meta name="decription" content="">
<!-- Title -->
<title>Welcome</title>
<!-- Fav Icon -->
<link rel="icon" href="img/logo.png" />
<!-- Include Bootstrap -->
<link rel="stylesheet" href="css/bootstrap.css" />
<!-- Include fonts -->
<link rel="stylesheet" href="css/font.css" />
<!-- Main StyleSheet -->
<link rel="stylesheet" href="style.css" />
<!-- Include fonts -->
<link rel="stylesheet" href="css/font.css" />
<!-- Responsive CSS -->
<link rel="stylesheet" href="css/responsive.css" />
</head>
<body onload="logoImage()">
<!--[if lte IE 9]>
<p class="browserupgrade">You are using an <strong>outdated</strong> browser. Please <a href="https://browsehappy.com/">upgrade your browser</a> to improve your experience and security.</p>
<![endif]-->
<div class="main main-one">
<!-- logo area start -->
<div class="logo">
<div class="container-fluid">
<div class="logo-wrapper">
<a href="#">
<img id="inBox" >
<!-- <img src="img/logo.png" alt="logo"> -->
</a>
</div>
</div>
</div>
<!-- logo area end -->
<!-- caform area start -->
<div class="cafrom">
<div class="container">
<div class="row">
<div class="col-lg-10 offset-lg-1">
<div class="cafrom-wrapper">
<div class="row">
<div class="col-lg-6 col-md-6 ">
<div class="caform-left cafrom-left-bg">
<form action="http://localhost:3000/upload" method="post" enctype="multipart/form-data" >
<div class="caform-left-input">
<div>
<span>Upload a photo..</span>
<input type="file" class="uploadlogo" name="photo" id="output" />
</div>
<!-- <form action="/upload" method="post" enctype="multipart/form-data">
<input type="file" accept="image/*" name="photo" >
<input type="submit" value="upload">
</form> -->
<!-- <button type="submit" id="submit" >Upload</button> -->
<button type="submit" class="sbtn btn btn-secondary btn-c" onclick="spinner()">Upload</button>
<div class="loader">
<div class="loading">
</div>
</div>
<button onclick="skip(event)">Skip</button>
<!-- <a class="btn btn-primary btn-lg disabled" role="button" href="./email_verification.html">Skip</a> -->
</div>
</form >
<!-- <div class="policy">
<p>By continuing, you're confirming that you've read and agree to our <a href="#">erms and Conditions,</a> <a href="#">Privacy Policy </a> and <a href="#">Cookie Policy</a></p>
</div> -->
</div>
</div>
<div class="col-lg-6 col-md-6">
<div class="caform-right text-center">
<h3>We're almost done<br/>
Just upload your picture</h3>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<!-- caform area end -->
</div>
<!-- Main jQuery -->
<script src="js/jquery-3.4.1.min.js"></script>
<!-- Bootstrap Proper jQuery -->
<script src="js/popper.js"></script>
<!-- Bootstrap jQuery -->
<script src="js/bootstrap.js"></script>
<!-- Fontawesome Script -->
<script src="https://kit.fontawesome.com/7749c9f08a.js"></script>
<!-- Custom jQuery -->
<script src="js/scripts.js"></script>
<script src="../actions.js"></script>
</body>
</html>
当我上传图像时，它成功地将其上传到我的本地“上传”目录，但在控制台上我看到第 50 行的“req.headers.cookie:undefined”。
我错过了什么吗？请帮忙。非常感谢各位！