在nodejs中上传文件使用请求模块

Question

我有一个功能上传文件：

handleUpload: function (e) {
    e.preventDefault();

    var files = this.refs.fileupload.getDOMNode().files; //get all the files to be upload.
    if (files.hasOwnProperty(0) //get the first file.
        && files[0] instanceof File) {

       var formData = new FormData();

       formData.append('fileUpload',
                       files[0]); //append file to be sent to the server.

       formData['fileUpload'] = files[0]

       Service.uploadContact(null,null,formData)
       .then(function(data){
         if (data.statusCode == 0) { //upload success
           this.setState({
             validationmessage: data.message,
             success: true,
             showSpinner: false
           })

           React.findDOMNode(this.refs.fileupload).value = '' //clear upload file.
           this.filterContact_Paging(1); //refresh the contact list.
         } else {
           this.setState({
             validationmessage: data.error, //upload fail error
             success: false,
             showSpinner: false
           })

           React.findDOMNode(this.refs.fileupload).value = '' //clear upload file.
         }
       }, function(_err){
         console.log('err: ', _err)
       })
    }   
},

代码进程上传使用请求模块：

serviceInterface[item.name] = function (params, csrfToken, formData) {
     return new Promise(function (resolve, reject) {
       var token = storage.get('token') || '',
         request_params = {
           url: CONFIG.apiPath + item.path,
           method: item.method,
           crossOrigin: true,
           withCredentials: false,
           json: true,
           headers: {'Authorization': 'Bearer ' + token},
         };

       //This is where you append form data and in most cases for file upload.
       if (formData) {
         request_params['formData'] = formData;
       }

       //This is a cross site reference token
       if (csrfToken) {
         headers['x-csrf-token'] = csrfToken.token;
         headers['x-csrf-sec'] = csrfToken.secret;
       }

       //This is where you determine post/get to send the data through body or querystring.
       if (item.method == 'GET') {
         request_params['qs'] = params;
       } else {
         request_params['body'] = params;
       }

       request(request_params, function (error, response, body) {
         if (error) {
           return reject(error);
         }

         if (response.statusCode === 418) {
           return reject(body);
         }

         return resolve(body);
       });
     });   
};

但是当我运行代码时，它会抛出一个错误： TypeError：self._form.on不是函数