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(public)/index.html:
<!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 中有空对象 我的来源有问题吗？
最佳答案
我没有看到您在单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现。
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)
}
}));
查看
<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>
端点 '/user/profile_pic_upload' POST 调用 Controller 中的 uploadProfilePic
var control = require('../controllers/controller');
app.post('/user/profile_pic_upload',control.uploadProfilePic);
在用户 Controller 中上传配置文件图片逻辑
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.
};
});
});
};
关于javascript - NodeJS Multer 不工作，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/29490833/