Question

routes.js

module.exports=function(app, upload){

        var postingsController=require('../controllers/postings.server.controller');

        app.post('/postings', postingsController.savePosting);

    }

controller.js

var multer=require('multer');

    exports.savePosting=function(req, res, next){

      // this diskstorage function is not at all executed
        var storage = multer.diskStorage({
            destination: function (req, file, cb) {
                cb(null, './uploads')
            },
            filename: function (req, file, cb) {
                console.log(file);
                cb(null, file.filename + '.' + 'jpg');
            }
        });

        var upload = multer({ storage: storage });
        upload.single('attachment');

        res.json({ message: "success" });

    }

有人可以告诉我哪一行准确上传文件。我是在主快捷配置文件中编写multer diskstorage配置还是可以在任何地方写入。顺便说一下，我能看到来自线路的json响应

Answer 1

通常，创建中间件并将其插入任何实际路由处理程序之外。例如：

<强> routes.js

var multer = require('multer');

var storage = multer.diskStorage({
  destination: function (req, file, cb) {
    cb(null, './uploads')
  },
  filename: function (req, file, cb) {
    console.log(file);
    cb(null, file.filename + '.' + 'jpg');
  }
});
var upload = multer({ storage: storage });

module.exports = function(app, upload) {
  var postingsController = require('../controllers/postings.server.controller');

  app.post('/postings',
           upload.single('attachment'),
           postingsController.savePosting);
};

<强> controller.js

exports.savePosting = function(req, res, next) {

  // Use `req.file` to access attachment

  if (req.file)
    res.json({ message: "success" });
  else // no file uploaded
    res.json({ message: "failure" });
};

Answer 2

Multer是一个中间件，这意味着它在大多数情况下都会作为参数添加到您的路线中。那么实际的语法是什么：
app.post ("/postings", multer ({ ... }), postingsController.savePosting);
Multer被要求在＆＃34; / posts＆＃34;以及为您完成所有文件工作的最终功能。然后它将通过
为您提供所有信息 req.files["fileInputName"]
在以下中间件中（您的功能是＆＃34;中间件＆＃34;也是）。

multer文件上传无效

2 个答案: