node.js之文件上传报错：TypeError: Cannot read property '0' of undefined

基于node.js的文件上传

　菜鸟教程学习使用node.js，实现文件上传，点击上传文件后却报错：TypeError: Cannot read property '0' of undefined。

（1）index.html代码如下：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>node.js 文件上传</title>
    <script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js"></script>
</head>
<body>
<h3>文件上传</h3>
选择一个文件上传：<br>
<form action="http://127.0.0.1:8081/file_upload" method="post" enctype="multipart/from-data">
    <input type="file" name="image" size="50"/>
    <br/>
    <input type="submit" value="上传文件"/>
</form>
</body>
</html>

　（2）server.js的代码如下

var express = require('express');
var app = express();
var fs = require('fs');

var bodyParser = require('body-parser');
var multer = require('multer');

app.use('/public',express.static('public'));
app.use(bodyParser.urlencoded({extended:false}));
app.use(multer({des:'/tmp/'}).array('image'));

app.get('/index.html',function (req,res) {
    res.sendFile(__dirname + '/' + 'index.html');
});

app.post('/file_upload',function (req,res) {
   console.log(req.files[0]);

   var des_file = __dirname + '/' + req.files[0].originalname;
   fs.readFile(req.files[0].path,function (err,data) {
       fs.writeFile(des_file,data,function (err) {
           if(err){
               console.log(err);
           } else {
               response = {
                   message:'File uploaded successfully',
                   filename:req.files[0].originalname
               };
           }
           console.log(response);
           res.end(JSON.stringify(response));
       });
   });
});

var server = app.listen(8081,function () {
    var host = server.address().address
    var port = server.address().port
    console.log('server running at http://%s:%s',host,port);
});

　运行server.js，访问index.html，点击上传文件之后跳转路由（/file_upload），显示如下错误：

 

 未解决，求大佬解答？

posted @ 2019-11-01 22:06  半忧夏  阅读(3881)  评论(0)  编辑  收藏  举报