Upload page is written in dropzone, found no explicit input controls, by catching fiddler, no content - disposition, name, fieldname information,
Want to use the post requests to realize

The code is:
Url="http://www... "
Headers={
XXX, XXX
}
Cookies=getcookies ()//here get the web cookies: jessionid=XXXXXXXXXXXX

Files={" file ": open (' d:/a.z IP 'and' rb ')}
Rep=requests. Post (url=url, headers=headers, cookies=cookies, files=files)
Assert "true" in rep. Text

And then reported the error, was rejected by the server, bosses, please simulate the dropzone upload? Can you give some ideas?