Node.js多方上传不起作用

Question

multiparty.Form()不工作。我在试着打印。(例如2,3,4)

这是我的图片上传代码：

app.post('/gallery/add',function(req, res,next) {
var input = JSON.parse(JSON.stringify(req.body));
var multipart = require('connect-multiparty');
var multiparty = require('multiparty');
var format = require('util').format;
var fs = require("fs");
var path = require('path');
var tempPath =req.files.image.path;
var filename2 =req.files.image.originalFilename;
req.getConnection(function (err, connection) {
    console.log('1');
   var form = new multiparty.Form();
   var image;
   var title;
form.on('error', next);
  form.on('close', function(err, fields, files){
      console.log('2');
      if(err) {
       next(err);
       console.log(err);
    } else {
  console.log('3');
      ins = fs.createReadStream(tempPath);
      ous = fs.createWriteStream(__dirname + '/uploads/' + image.filename);
      util.pump(ins, ous, function(err) {
        if(err) {
          next(err);
        } else {
          res.redirect('/#gallery/add');
          res.end();
        }
      });
      //console.log('\nUploaded %s to %s', files.photo.filename, files.photo.path);
      //res.send('Uploaded ' + files.photo.filename + ' to ' + files.photo.path);
    }
    res.send(format('\nuploaded %s (%d Kb) as %s'
      , image.filename
      , image.size / 1024 | 0
      , title));
  });
 // listen on field event for title
  form.on('field', function(name, val){

  console.log('4');
    if (name !== 'title') return;
    title = val;
  });

  // listen on part event for image file
  form.on('part', function(part){
 console.log('5');
    if (!part.filename) return;
    if (part.name !== 'image') return part.resume();
    image = {};
    image.filename = part.filename;
    image.size = 0;
    part.on('data', function(buf){
      image.size += buf.length;
    });
  });

  // parse the form
   form.parse(req);

    });
});

看起来form.on方法不起作用。

我哪里错了？