Question

我正在尝试使用multer保存文件，但它并不真正想要工作：

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

var upload = multer({ storage: storage,
onFileUploadComplete : function (file) {
    console.log('Completed file!');
},
onParseStart : function() {
     console.log('whatevs');
}});

app.post('/upload' ,upload.single('thisisme'), function(req,res) {});

文件确实已保存，但ParseStart或UploadComplete从未被触发。这是为什么？我也尝试过使用app.use（multer ...）;

Answer 1

这是因为你正在尝试使用旧的multer api。在当前版本中，没有事件处理程序：onFileUploadComplete和onParseStart。请查看api详细信息的文档：https://github.com/expressjs/multer

您的代码的这一部分看起来不错：

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

这也没关系：

app.post('/upload' ,upload.single('thisisme'), function(req,res) {});

这是错误的：

var upload = multer({ storage: storage,
onFileUploadComplete : function (file) {
    console.log('Completed file!');
},
onParseStart : function() {
     console.log('whatevs');
}});

将其更改为：

var upload = multer({ 
  storage: storage,
  fileFilter:function(req, file, cb) {
    //Set this to a function to control which files should be uploaded and which should be skipped. It is instead of onParseStart.
  }
});

没有任何东西代替onFileUploadComplete。但是：

app.post('/upload' ,upload.single('thisisme'), function(req,res) {
//this is call when upload success or failed
});

你可以改为：

app.post('/upload', function (req, res) {
  upload.single('thisisme')(req, res, function (err) {
    if (err) {
      // An error occurred when uploading
      return
    }

    // Everything went fine, and this is similar to onFileUploadComplete
  })
})

Nodejs multer选项不会触发

1 个答案: