Javascript 尝试使用multer从客户端（角度）将文件保存到服务器（Express）

我没有收到任何错误，但是目录中没有文件，所以我完全不知道在哪里查找错误。我真的很感谢你提供的任何帮助

HTML:

      <div class="form-group">
            <label for="file">File</label>
            <input type="file" name="file" onchange="angular.element(this).scope().uploadFile('front',this.files)"/>
            <label for="file">File2</label>
            <input type="file" name="file" onchange="angular.element(this).scope().uploadFile('back',this.files)"/>
        </div>

工厂文件：

.factory('Pics', function ($http) {
    var sendPhotos = function (files) {
      return $http({
        method: 'POST',
        url: '/upload/photos',
        headers: {
          'Content-Type': ''
        },
        data: files,
        transformRequest : angular.identity
      }).then(function (resp) {
        console.log('done')
      })
    }

    return ({
      sendPhotos
    })
  })

服务器：

var express = require('express');
var morgan = require('morgan');
var bodyParser = require('body-parser');
var path = require('path');
var multer = require('multer');


var app = express();


var storage = multer.diskStorage({
  destination: function (req, file, cb){
    cb(null, '/Users/pheon/Desktop/Smartfolio-1/server/uploads')
  },
  filename: function (req, file, cb){
    cb(null, file.fieldname)
  }
})

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

var middle = upload.fields([{
  name: 'front', maxcount: 1
}, {name: 'back', maxcount: 1}]);

app.use(middle);
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(morgan('dev'));

app.use(express.static(path.join(__dirname, '/../client')));

require('./routes.js')(app, express);
var port = process.env.PORT || 8000;

app.listen(port, function () {
  console.log('Listening on port ', port);
})


module.exports = app;

路线

var uController = require('./controllers/userController.js');
var iController = require('./controllers/imgController.js');
var multer = require('./config/multer')

module.exports = function (app, express) {
  app.post('/signin', uController.signin);
  app.post('/register', uController.register);
  app.get('/photos', iController.fetch);
  app.post('/upload/photos', iController.upload);
}

IMG控制器（进程中）：

---

我找到了解决办法。在工厂文件中，而不是

内容类型：'

应该是

内容类型：未定义

var uController = require('./controllers/userController.js');
var iController = require('./controllers/imgController.js');
var multer = require('./config/multer')

module.exports = function (app, express) {
  app.post('/signin', uController.signin);
  app.post('/register', uController.register);
  app.get('/photos', iController.fetch);
  app.post('/upload/photos', iController.upload);
}

var db = require('./../config/db');
module.exports = {
  fetch: function (req, res) {
    console.log('here')
  },
  upload: function (req, res) {
    console.log(req.body)//shows up empty
  }
};