I have created a hello world module following this tutorial https://www.odoo.com/documentation/9.0/howtos/website.html and it's working fine.

Now I would like to implement a file upload on this hello world page.

My templates.xml file is like this (I just get the relavant part):

<form action="/upload" method="post" enctype="multipart/form-data">    
    Upload file: <input type="file" name="uploaded" /> <br />    
    <input type="submit" name="submit" value="Submit" />
</form>

My controllers.py is like this (I also just give the relevant part,  my module name is "sunxia") :

# -*- coding: utf-8 -*-
from openerp import http
import cgi
class Sunxia(http.Controller):     
    @http.route('/upload', type="http", auth="public", methods=['GET', 'POST'])    
    def upload_file(self):        
        form_data = cgi.FieldStorage()        
        file_data = form_data['uploaded'].value        
        fp =open('/uploads','wb')        
        fp.write(file_data)        
        fp.close()        
    return 

But after choosing a file and click the upload button, the /uploads page gave an error messange:

TypeError: upload_file() got an unexpected keyword argument 'uploaded'

It seems that it cannot get the uploaded file in my controller. Can anyone told my how may I change my controller to implement this simple upload?

Since I'm quite new to odoo and python... I would strongly appreciate if you could give me more detail about this.