$ [sudo] npm install --save uploadify

$ [sudo] npm install --save koa-uploadify

var mount_uploadify = require('uploadify')

mount_uploadify(app,{
  path:'/fileupload',
  fileKey:'myfile',
  multer:{ dest: 'uploads/' },
  callback:function(req){
    console.log(111);
    return req.files
  }
});

mount_uploadify(app,{
  debug: false,
  qn: simditor_qn_config.qn,
  path: '/fileupload',
  fileKey: 'myfile',
  multer: simditor_qn_config.multer,
  callback: function(req){
      console.log(req);
  }
});

$("#fileuploader").uploadFile({
	url:"/fileupload/",
	fileName:"myfile",
  multiple:true,
  dragDrop:true,
  showDownload:true,
  showDelete: true,
  onSuccess: function (files, response, xhr, pd) {
    alert(JSON.stringify(response[0].url.split('/').pop()));
  },
  statusBarWidth:300,
  dragdropWidth:300,
  deleteCallback: function (data, pd) {
      for (var i = 0; i < data.length; i++) {
        alert(data);
          $.post("delete.php", {op: "delete",name: data[i]},
              function (resp,textStatus, jqXHR) {
                  //Show Message	
                  alert("File Deleted");
              });
      }
      pd.statusbar.hide(); //You choice.

  },
  downloadCallback:function(filename,pd)
  	{
  		location.href="download.php?filename="+filename;
  	}
});

jquery-upload-file/

extends layout

block content
  h1= title
  p Welcome to #{title}

  #fileuploader Upload
    
  script.
    $(document).ready(function() {
    	$("#fileuploader").uploadFile({
    		url:"/fileupload/",
    		fileName:"myfile",
        multiple:true,
        dragDrop:true,
        showDownload:true,
        showDelete: true,
        onSuccess: function (files, response, xhr, pd) {
          alert(JSON.stringify(files));
        },
        statusBarWidth:600,
        dragdropWidth:600,
        deleteCallback: function (data, pd) {
            for (var i = 0; i < data.length; i++) {
              alert(data);
                $.post("delete.php", {op: "delete",name: data[i]},
                    function (resp,textStatus, jqXHR) {
                        //Show Message	
                        alert("File Deleted");
                    });
            }
            pd.statusbar.hide(); //You choice.

        },
        downloadCallback:function(filename,pd)
        	{
        		location.href="download.php?filename="+filename;
        	}
    	});
    });