我想使用multer从表单中快速上传图像。
我找到一个关于如何使用multer上传文件的post,并触发重命名文件的事件。但是,我发现它只适用于旧版本(multer-0.1.6)
在multer github的最新说明中,我认为我必须使用disk storage engine
上传具有新名称的文件,但它不起作用。请给我一些指示,我整天都试过这个功能......
而且,我不确定为什么需要res.status(204).end();
?我没有添加此行,当我点击上传按钮时,网页将始终锁定...
的package.json
{
"name": "FileUpload",
"version": "0.0.0",
"private": true,
"scripts": {
"start": "node ./bin/www"
},
"dependencies": {
"body-parser": "~1.13.2",
"cookie-parser": "~1.3.5",
"debug": "~2.2.0",
"express": "~4.13.1",
"jade": "~1.11.0",
"morgan": "~1.6.1",
"multer": "^1.0.6",
"serve-favicon": "~2.3.0"
}
}
upload.js
var express = require('express');
var multer = require('multer');
var upload = multer({ storage: storage });
var app = express();
app.post('/uploadImage', upload.single('image'), function (req, res, next) {
console.log("success");
console.log(req.file);
res.status(204).end();
});
app.get('/',function(req,res){
console.log("It's work");
res.sendFile(__dirname + "/index.html");
});
var storage = multer.diskStorage({
destination: function (req, file, cb) {
console.log("Dest");
cb(null, 'uploads/')
},
filename: function (req, file, cb) {
cb(null, file.fieldname + '-' + Date.now())
}
});
app.listen(3000,function(){
console.log("Working on port 3000");
});
的index.html
<form id = "uploadForm"
enctype = "multipart/form-data"
action = "/uploadImage"
method = "post"
>
<input type="file" name="image" />
<input type="submit" value="Upload Image" name="submit">
</form>
解决方案 我的代码无法运行的原因是代码的顺序...... 以下顺序是正确的。
var express = require('express');
var multer = require('multer');
var app = express();
app.get('/',function(req,res){
console.log("It's work");
res.sendFile(__dirname + "/index.html");
});
var storage = multer.diskStorage({
destination: function (req, file, cb) {
console.log("Dest");
cb(null, 'uploads/')
},
filename: function (req, file, cb) {
cb(null, file.fieldname + '-' + Date.now())
}
});
var upload = multer({ storage: storage });
app.post('/uploadImage', upload.single('image'), function (req, res, next) {
console.log("success");
console.log(req.file);
res.status(204).end();
});
app.listen(3000,function(){
console.log("Working on port 3000");
});
答案 0 :(得分:7)
在GitHub中你可以找到这个例子,对我来说它正在发挥作用:
var express = require('express');
var multer = require('multer');
var storage = multer.diskStorage({
destination: function (req, file, cb) {
cb(null, '/tmp/my-uploads')
},
filename: function (req, file, cb) {
cb(null, file.fieldname + '-' + Date.now())
}
})
var upload = multer({ storage: storage })
var app = express();
app.post('/uploadImage', upload.single('image'), function (req, res, next) {
console.log("success");
console.log(req.file);
res.status(204).end();
});