javascript - AngularJS 无法上传文件 Express

Question

我正在尝试上传一个文件到express(以便稍后我可以将其上传到mongoDB)。但是，当我尝试上传文件以表达时，我打印出响应数据，并且似乎没有任何内容被传入。

我正在使用 ng-file-upload.min.js。谁能帮我吗？

脚本.js

var app = angular.module('fileUpload', ['ngFileUpload']);

app.controller('MyCtrl', ['$scope', 'Upload', '$timeout', function ($scope, Upload, $timeout) {
    $scope.uploadFiles = function(files, errFiles) {
        $scope.files = files;
        $scope.errFiles = errFiles;
        angular.forEach(files, function(file) {
            file.upload = Upload.upload({
                url: '/uploadFile',
                data: {file: file}
            });

            file.upload.then(function (response) {
                $timeout(function () {
                    file.result = response.data;
                });
            }, function (response) {
                if (response.status > 0)
                    $scope.errorMsg = response.status + ': ' + response.data;
            }, function (evt) {
                file.progress = Math.min(100, parseInt(100.0 *evt.loaded / evt.total));
            });
        });
    }
}]);

服务器.js

var express = require('express');
var path = require('path'); //core module 
var databaseUrl = "localhost:27017/DB"; // default env
var bodyParser = require('body-parser');
var multer  = require('multer');
var storage =   multer.diskStorage({
  destination: function (req, file, callback) {
    callback(null, './uploads');
  },
  filename: function (req, file, callback) {
    callback(null, file.fieldname + '-' + Date.now());
  }
});
var upload = multer({ storage : storage}).single('userFile');

// Configure app
var app = express(); 

// Store all html files in views 
app.use(express.static(__dirname + '/views'));
// Parses recived json input 
app.use(bodyParser.json());
// Store all js in Scripts folder
app.use(express.static(__dirname + '/scripts'));

// Technology not needed but good practice, especailly when serval people are working on it 
app.get('/', function (req, res) {
    res.sendFile('index.html');
}); 

// Listen for Seach collection request


app.post('/uploadFile',function(req,res){
    upload(req,res,function(err) {
        if(err) {
            console.log("Error uploading file"); 
        }else{
            var databaseName = "E-learn" , collection = "Uploads"; 
            var data = req.body;
            console.log("Got req:"+req);
        }
    });
});

// Implement a web server to listen to requests on port 4444 
app.listen(5555, function(){
    console.log('ready on port 5555'); 
}); 

索引.html

<!-- Page Content -->
<div class="container"  ng-app="fileUpload" ng-controller="MyCtrl">
  <div class="panel panel-default">
    <div class="panel-heading"><strong>Upload Files</strong> <small>Bootstrap files upload</small></div>
    <div class="panel-body">

      <!-- Standar Form -->
      <h4>Select files from your computer</h4>
      <form action="" method="post" enctype="multipart/form-data" id="js-upload-form">
        <div class="form-inline">
          <div class="form-group">
            <input name="userFile" type="file" ngf-select="uploadFiles($files, $invalidFiles)" multiple accept="image/*" ngf-max-height="1000" ngf-max-size="1MB">
          </div>
          <button type="submit" class="btn btn-sm btn-primary" id="js-upload-submit">Upload files</button>
        </div>
      </form>
      <!-- Drop Zone -->
      <h4>Or drag and drop files below</h4>
      <div class="upload-drop-zone" id="drop-zone" ngf-drop ngf-select ng-model="files" class="drop-box" 
    ngf-drag-over-class="'dragover'" ngf-multiple="true" ngf-allow-dir="true"
    accept="image/*,application/pdf" ngf-pattern="'image/*,application/pdf'">
        Just drag and drop files here
      </div>
      <!-- Progress Bar
      <div class="progress">
        <div class="progress-bar" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100" style="width: 60%;">
          <span class="sr-only">60% Complete</span>
        </div>
      </div>
      -->
      <!-- Upload Finished -->
      <div class="js-upload-finished">
        <h3>Processed files</h3>
        <div class="list-group">
            <ul>
            <li ng-repeat="f in files" style="font:smaller"><span class="badge alert-success pull-right">{{f.name}} {{f.$errorParam}}</span>
              <span class="progress" ng-show="f.progress >= 0">
                <div style="width:{{f.progress}}%" ng-bind="f.progress + '%'"></div>
              </span>
            </li>
            <li ng-repeat="f in errFiles" style="font:smaller">
                {{f.name}} {{f.$error}} {{f.$errorParam}}
            </li> 
          </ul>
          {{errorMsg}}
        </div>
      </div>
    </div>
  </div>
</div> 

结果 上传文件时出错

Answer 1

看起来您的 Express 服务器没有使用任何中间件来接收文件上传。 body-parser 不会为你做这件事。我个人使用multer .