我尝试使用NodeJS + ExpressJS + Multer上传文件，但效果不佳。
我的ExpressJS版本是4.12.3
这是我的来源
server.js：
var express = require('express'),
multer = require('multer');
var app = express();
app.use(express.static(__dirname + '/public'));
app.use(multer({ dest: './uploads/'}));
app.post('/', function(req, res){
console.log(req.body); // form fields
console.log(req.files); // form files
res.status(204).end()
});
app.get('/', function(req, res) {
res.sendFile('public/index.html');
});
app.listen(5000, function() {
console.log("start 5000");
});
公共/ index.html的：
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
</head>
<body>
<form method="post" enctype="multipart/form-data">
<input id="file" type="file"/>
<button type="submit">test</button>
</form>
</body>
</html>
单击“提交”按钮时，我的NodeJS控制台日志：
"C:\Program Files\nodejs\node.exe" server.js
start 5000
{}
在NodeJS控制台上，req.files上有空对象我的源代码有问题吗？
我没有看到你在点击提交按钮时调用任何API来上传文件。让我给你更全面的实施。
app.js中的multer配置app.use(multer({
dest: './uploads/',
rename: function (fieldname, filename) {
return filename.replace(/\W+/g, '-').toLowerCase() + Date.now()
},
onFileUploadStart: function (file) {
console.log(file.fieldname + ' is starting ...')
},
onFileUploadData: function (file, data) {
console.log(data.length + ' of ' + file.fieldname + ' arrived')
},
onFileUploadComplete: function (file) {
console.log(file.fieldname + ' uploaded to ' + file.path)
}
}));
<form id="uploadProfilePicForm" enctype="multipart/form-data" action="/user/profile_pic_upload" method="post">
<input type="file" multiple="multiple" id="userPhotoInput" name="userPhoto" accept="image/*" />
<input type="submit" name="submit" value="Upload">
</form>
终点'/user/profile_pic_upload'POST在控制器中调用uploadProfilePic
var control = require('../controllers/controller');
app.post('/user/profile_pic_upload',control.uploadProfilePic);
uploadProfilePic = function(req,res){
// get the temporary location of the file
var tmp_path = req.files.userPhoto.path;
// set where the file should actually exists
var target_path = '/Users/narendra/Documents/Workspaces/NodeExpressWorkspace/MongoExpressUploads/profile_pic/' + req.files.userPhoto.name;
// move the file from the temporary location to the intended location
fs.rename(tmp_path, target_path, function(err) {
if (err) throw err;
// delete the temporary file, so that the explicitly set temporary upload dir does not get filled with unwanted files
fs.unlink(tmp_path, function() {
if (err) {
throw err;
}else{
var profile_pic = req.files.userPhoto.name;
//use profile_pic to do other stuffs like update DB or write rendering logic here.
};
});
});
};
使用this example，它使用firebase云功能和firebase存储来上传文件，但你可以使用它做任何事情，它使用快速多部分文件解析器和像魅力的工作上面的链接只是工作完美，我测试了这个代码，并推动它为你们回复。只需添加你的配置就可以了。
试试这个
var multer = require('multer')
var storage = multer.diskStorage({
destination: function (request, file, callback) {
callback(null, './uploads/');
},
filename: function (request, file, callback) {
console.log(file);
callback(null, file.originalname)
}
});
var upload = multer({ storage: storage });
app.post('/', upload.single('photo'), function (req, res) {
console.log(req.body) // form fields
console.log(req.file) // form files
res.status(204).end()
});
ref：http://wiki.workassis.com/nodejs-express-get-post-multipart-request-handling-example/