Question

我正在尝试学习使用以下代码上传文件：

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

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

app.use(express.static('public'));
app.use(bodyParser.urlencoded({ extended: false }));
app.use(multer({dest:'./uploads/'}).single('file'));

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

app.post('/file_upload', function (req, res) {
   console.log(req.file.name);
   console.log(req.file.path);
   console.log(req.file.type);
   var file = __dirname + "/" + req.file.name;
   console.log("File Name: " file);
   fs.readFile( req.file.path, function (err, data) {
      fs.writeFile(file, data, function (err) {
         if( err ) {
            console.log( err );
            } else {
               response = {
                  message:'File uploaded successfully',
                  filename:req.file.name
               };
            }

         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("Example app listening at http://%s:%s", host, port)
})

文件已成功上传到/ uploads目录中，但是，我无法从那里打开文件。另外，当我尝试console.log(req.file.name);得到不确定的输出时，我无法打印文件名。

任何帮助将不胜感激。提前致谢。

编辑：按要求输出控制台

Info: Start process (2:45:28 PM)
Example app listening at http://:::8081
undefined
uploads\3cbe4d0c18a778a9faddc6243c26b26a
undefined
File Name:  undefined
{ message: 'File uploaded successfully', filename: undefined }
Process canceled
Info: End process (2:52:29 PM)

为什么我无法使用以下nodeJS代码上传文件

0 个答案: