我试图得到一个简单的文件上传机制与Express 4.0工作,但我一直得到未定义的请求。app.post主体中的文件。以下是相关代码:
var bodyParser = require('body-parser');
var methodOverride = require('method-override');
//...
app.use(bodyParser({ uploadDir: path.join(__dirname, 'files'), keepExtensions: true }));
app.use(methodOverride());
//...
app.post('/fileupload', function (req, res) {
console.log(req.files);
res.send('ok');
});
. .以及附带的Pug代码:
form(name="uploader", action="/fileupload", method="post", enctype="multipart/form-data")
input(type="file", name="file", id="file")
input(type="submit", value="Upload")
解决方案
感谢下面mscdex的响应,我已经切换到使用busboy而不是bodyParser:
var fs = require('fs');
var busboy = require('connect-busboy');
//...
app.use(busboy());
//...
app.post('/fileupload', function(req, res) {
var fstream;
req.pipe(req.busboy);
req.busboy.on('file', function (fieldname, file, filename) {
console.log("Uploading: " + filename);
fstream = fs.createWriteStream(__dirname + '/files/' + filename);
file.pipe(fstream);
fstream.on('close', function () {
res.redirect('back');
});
});
});
Multer是一个处理“多部分/表单数据”的中间件,神奇地使上传的文件和表单数据以请求的形式提供给我们。文件和request.body。
安装multer:—NPM install multer—save
在.html文件中:-
<form method="post" enctype="multipart/form-data" action="/upload">
<input type="hidden" name="msgtype" value="2"/>
<input type="file" name="avatar" />
<input type="submit" value="Upload" />
</form>
.js文件:-
var express = require('express');
var multer = require('multer');
var app = express();
var server = require('http').createServer(app);
var port = process.env.PORT || 3000;
var upload = multer({ dest: 'uploads/' });
app.use(function (req, res, next) {
console.log(req.files); // JSON Object
next();
});
server.listen(port, function () {
console.log('Server successfully running at:-', port);
});
app.get('/', function(req, res) {
res.sendFile(__dirname + '/public/file-upload.html');
})
app.post('/upload', upload.single('avatar'), function(req, res) {
console.log(req.files); // JSON Object
});
希望这能有所帮助!
Multer是一个处理“多部分/表单数据”的中间件,神奇地使上传的文件和表单数据以请求的形式提供给我们。文件和request.body。
安装multer:—NPM install multer—save
在.html文件中:-
<form method="post" enctype="multipart/form-data" action="/upload">
<input type="hidden" name="msgtype" value="2"/>
<input type="file" name="avatar" />
<input type="submit" value="Upload" />
</form>
.js文件:-
var express = require('express');
var multer = require('multer');
var app = express();
var server = require('http').createServer(app);
var port = process.env.PORT || 3000;
var upload = multer({ dest: 'uploads/' });
app.use(function (req, res, next) {
console.log(req.files); // JSON Object
next();
});
server.listen(port, function () {
console.log('Server successfully running at:-', port);
});
app.get('/', function(req, res) {
res.sendFile(__dirname + '/public/file-upload.html');
})
app.post('/upload', upload.single('avatar'), function(req, res) {
console.log(req.files); // JSON Object
});
希望这能有所帮助!
看起来在Express 3中,体解析器确实支持上传文件,但在Express 4中,当它不再将Connect作为依赖项时,该支持就被取消了
在查看了mscdex的答案中的一些模块后,我发现express-busboy是一个更好的选择,也是最接近临时替代品的选择。我注意到的唯一不同之处是上传文件的属性。
console.log(req.files)使用body解析器(Express 3)输出一个类似这样的对象:
{ file:
{ fieldName: 'file',
originalFilename: '360px-Cute_Monkey_cropped.jpg',
name: '360px-Cute_Monkey_cropped.jpg'
path: 'uploads/6323-16v7rc.jpg',
type: 'image/jpeg',
headers:
{ 'content-disposition': 'form-data; name="file"; filename="360px-Cute_Monkey_cropped.jpg"',
'content-type': 'image/jpeg' },
ws:
WriteStream { /* ... */ },
size: 48614 } }
相比console.log(req.files)使用Express -busboy (Express 4):
{ file:
{ field: 'file',
filename: '360px-Cute_Monkey_cropped.jpg',
file: 'uploads/9749a8b6-f9cc-40a9-86f1-337a46e16e44/file/360px-Cute_Monkey_cropped.jpg',
mimetype: 'image/jpeg',
encoding: '7bit',
truncated: false
uuid: '9749a8b6-f9cc-40a9-86f1-337a46e16e44' } }