express4.x中上傳檔案的中介軟體

在上傳介面中新增multer中介軟體

var multer  = require('multer')
var storage = multer.diskStorage({
  destination: function (req, file, cb) {
    var dir = path.resolve(__dirname, '../public', 'photos')
    cb(null, dir)
  },
  filename: function (req, file, cb) {
    cb(null, file.originalname)
  }
})
var
 
 upload = multer({ storage: storage })

single('filename')此處的filename為input標籤的name屬性的值。

router.post('/upload', upload.single('photoImage'), function (req, res, next) {
  var img = req.file
  var name = req.body.photoName || img.originalname
  var mathes = /\/(.+)$/.exec(img.mimetype)
  if (!name.includes(mathes[1
 
])) {
    name = name + '.' + mathes[1]
  }
  var newPath = path.resolve(__dirname, '../public', 'photos', name)
  fs.rename(img.path, newPath, function (err) {
    if (err) {
      return next(err)
    }
    Photo.create({
      name: name,
      path: newPath
    }, function(err) {
      if (err) {
        return
 
 next(err)
      }
      res.redirect('/photos/upload')
    })
  })
})