Node/Multer Get Filename

问题:

I am using the following to upload files to a directory via Multer. It works great, but I need to perform some actions after upload that require the name of the file I just posted to the "upload" directory. How do I get the name of the file I just posted?

// Multer storage options
var storage = multer.diskStorage({
  destination: function(req, file, cb) {
    cb(null, 'upload/');
  },
  filename: function(req, file, cb) {
    cb(null, file.originalname + '-' + Date.now() + '.pdf');
  }
});

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

app.post('/multer', upload.single('file'), function(req, res) {
  // Need full filename created here
});

回答1:

request.file gives the following stats, from which you would just need to pick request.file.originalname or request.file.filename to get the new filename created by nodejs app.

{ 
  fieldname: 'songUpload',
  originalname: '04. Stairway To Heaven - Led Zeppelin.mp3',
  encoding: '7bit',
  mimetype: 'audio/mp3',
  destination: './uploads',
  filename: 'songUpload-1476677312011',
  path: 'uploads/songUpload-1476677312011',
  size: 14058414 
}

Eg, in nodejs express mvc app with ecma-6,

var Express = require('express');
var app = Express();

var multipartUpload = Multer({storage: Multer.diskStorage({
    destination: function (req, file, callback) { callback(null, './uploads');},
    filename: function (req, file, callback) { callback(null, file.fieldname + '-' + Date.now());}})
}).single('songUpload');

app.post('/artists', multipartUpload, (req, resp) => {
     val originalFileName = req.file.originalname
     console.log(originalFileName)
}

回答2:

var express=require("express");
var app=express();
var multer=require("multer");
var upload=multer({dest:"uploads/"});
app.post("/multer", upload.single("file"), function(req,res){
    console.log(req.file.filename);
});

回答3:

Accessing uploaded files data differs in Multer, depending whether you are uploading single or multiple files. Access data like so:

uploading single file:

req.file

uploading multiple files:

req.files

回答4:

using request.file.filename

fieldname Field name specified in the form
originalname Name of the file on the user's computer encoding Encoding type of the file
mimetype Mime type of the file
size Size of the file in bytes