如何使用multer存储带有文件扩展名的文件? [英] How to store a file with file extension with multer?

问题描述

设法将我的文件存储在一个文件夹中，但是它们存储时没有文件扩展名.

Managed to store my files in a folder but they store without the file extension.

有人知道我将如何存储带有文件扩展名的文件吗?

Does any one know how would I store the file with file extension?

推荐答案

从文档中:"Multer不会为您添加任何文件扩展名，您的函数应返回带有文件扩展名的文件名."

From the docs: "Multer will not append any file extension for you, your function should return a filename complete with an file extension."

以下是添加扩展名的方法:

Here's how you can add the extension:

var multer = require('multer');

var storage = multer.diskStorage({
  destination: function (req, file, cb) {
    cb(null, 'uploads/')
  },
  filename: function (req, file, cb) {
    cb(null, Date.now() + '.jpg') //Appending .jpg
  }
})

var upload = multer({ storage: storage });

我建议使用mimetype属性来确定扩展名.例如:

I would recommend using the mimetype property to determine the extension. For example:

filename: function (req, file, cb) {
  console.log(file.mimetype); //Will return something like: image/jpeg

更多信息: https://github.com/expressjs/multer

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