Khu*_*boo 12 javascript file-upload node.js
我使用了以下代码:
fileupload.html
<html>
<head>
<title>File Uploading Form</title>
</head>
<body>
<h3>File Upload:</h3>
Select a file to upload: <br />
<form action="http://127.0.0.1:8081/file_upload" method="POST" enctype="multipart/form-data">
<input type="file" name="file" size="50" />
<br />
<input type="submit" value="Upload File" />
</form>
</body>
</html>
fileupload.js:
var express = require('express');
var app = express();
var fs = require("fs");
var bodyParser = require('body-parser');
var multer = require('multer');
//console.log(multer);
app.use(express.static('public'));
app.use(bodyParser.urlencoded({ extended: false }));
app.use(multer({ dest: '/tmp/'}));
app.get('/fileupload.html', function (req, res) {
res.sendFile( __dirname + "/" + "fileupload.html" );
})
app.post('/file_upload', function (req, res) {
console.log(req.files.file.name);
console.log(req.files.file.path);
console.log(req.files.file.type);
var file = __dirname + "/" + req.files.file.name;
fs.readFile( req.files.file.path, function (err, data) {
fs.writeFile(file, data, function (err) {
if( err ){
console.log( err );
}else{
response = {
message:'File uploaded successfully',
filename:req.files.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)
})
我已经使用上面的代码进行文件上传但是当在终端使用节点fileupload.js执行时,我收到类型错误 TypeError('app.use() requires middleware functions');
任何人都可以帮助解决这个问题.
msc*_*dex 15
你正试图使用multer旧的API.它改变了一段时间,请参阅文档以获取更多信息.
在您上传单个文件的特定情况下,您将删除该app.use(multer({ ... }))行,而是使用.single()和req.file喜欢:
var upload = multer({ dest: '/tmp/'});
// File input field name is simply 'file'
app.post('/file_upload', upload.single('file'), function(req, res) {
var file = __dirname + '/' + req.file.filename;
fs.rename(req.file.path, file, function(err) {
if (err) {
console.log(err);
res.send(500);
} else {
res.json({
message: 'File uploaded successfully',
filename: req.file.filename
});
}
});
});