路由中的节点多路器

Question

我的 app.js 中有 multer，例如：

var multer  = require('multer');
app.use(multer({ dest: './public/img/profile/',
 rename: function (fieldname, filename) {
    return fieldname;
  },
onFileUploadStart: function (file) {
  console.log(file.originalname + ' is starting ...')
},
limits: {
  files: 1
},
onFileUploadComplete: function (file) {
  console.log(file.fieldname + ' uploaded to  ' + file.path)
  imageUploaded=true;
}
}));

这可行，但我想在特定路线中设置这些设置。例如 imageRoute.js 而不是我的 app.js。但是我应该使用什么来代替 app.use() 而不是因为我无法在我的路线中访问应用程序。我在我的 app.js 中创建路由，例如：

  var imageRoutes  = require('./routes/imageRoutes')();
  app.use('/image', imageRoutes);

imageRoutes.js

module.exports = function(passport) {

var that = this;

// Modules
var express = require('express');
var router = express.Router();
var fs = require('fs');

// Middleware: Checks if user is authenticated removed for more readable code


router.post('/fileupload', that.ensureAuthenticated, function(req, res, next) {
   //setup multer here 
});

 router.post('/fileupload2', that.ensureAuthenticated, function(req, res, next) {
   //setup multer here with a different destination path/filename etc
});




return router;
}

我找到了this question，但它并没有真正帮助我。

更新

我现在用 :

编辑了我的 app.js

 var multer  = require('multer');
 var imageRoutes= require('./routes/imageRoutes')(someRepo, multer);

imageRoutes.js

// POST: CREATE avatar
router.post('/avatar', function(req, res) {
    router.use(multer({
        dest: './public/img/profile/',
        rename: function (fieldname, filename) {
            return fieldname;
        },
        onFileUploadStart: function (file) {
            console.log(file.originalname + ' is starting ...')
        },
        limits: {
            files: 1
        },
        onFileUploadComplete: function (file) {
            console.log(file.fieldname + ' uploaded to  ' + file.path)
            imageUploaded=true;
            console.log(req.files);
            res.redirect('/');
        }
    }))

}); 

我看到 chrome 正在将文件上传到 100%，但它什么也没做。它没有记录正在启动..或任何其他错误。

Answer 1

您可以将多个中间件/路由器传递给.use()：

var multer  = require('multer');
var parseUploads = multer({
  dest: './public/img/profile/',
  rename: function (fieldname, filename) {
    return fieldname;
  },
  onFileUploadStart: function (file) {
    console.log(file.originalname + ' is starting ...')
  },
  limits: {
    files: 1
  },
  onFileUploadComplete: function (file) {
    console.log(file.fieldname + ' uploaded to  ' + file.path)
    imageUploaded=true;
  }
});

// ...

var imageRoutes  = require('./routes/imageRoutes')();
app.use('/image', parseUploads, imageRoutes);

如果您想将逻辑完全移动到 imageRoutes.js 并且您的 multer 逻辑是特定于路由的，您可以执行以下操作：

router.post('/avatar', multer({
  dest: './public/img/profile/',
  rename: function (fieldname, filename) {
    return fieldname;
  },
  onFileUploadStart: function (file) {
    console.log(file.originalname + ' is starting ...')
  },
  limits: {
    files: 1
  },
  onFileUploadComplete: function (file) {
    console.log(file.fieldname + ' uploaded to  ' + file.path)
  }
}), function(req, res) {
  // Here you can check `Object.keys(req.files).length`
  // or for specific fields like `req.files.imageField`
  res.redirect('/');
});