need help to upload file to webserver

[Sells, Fred]

I am automating the client side of a simple web interface. I need to upload a file to a webserver that requires authentication. I've got the authentication working with urllib2 (see below), but the only examples I've found to upload files use httplib without authentication. I'm competent with Python but no whiz with web api's. Could I get a little help please.

---------the form I'm trying to simulate looks like this----------------------
<FORM action=/cgi/upload.exe method=post encType=multipart/form-data>
<INPUT type=file name=file></P>
<INPUT type=submit value=Send>
</FORM>

------------------my code follows---------------------------------------------
import urllib2, urllib, socket, base64, cookielib
import webtools # from http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/146306
STANDARD_HEADERS = {'User-agent':'Mozilla/5.0 (compatible; MSIE 5.5; Windows NT)'}
COOKIEFILE = 'cokies.lwp'
socket.setdefaulttimeout(30)

HTTP = "http://"
HTTPS = "https://"
#IP, UNAME, PW = "............." #deleted for security
top_level_url = "http://..............."


PasswordManager = urllib2.HTTPPasswordMgrWithDefaultRealm()
PasswordManager.add_password(None, top_level_url, UNAME, PW)
AuthenticationHandler = urllib2.HTTPBasicAuthHandler(PasswordManager)
opener = urllib2.build_opener(AuthenticationHandler)
urllib2.install_opener(opener)


class MyConnection:
def __init__(self, ipaddr="192.168.1.0", uname=None, password=None):
self.SERVER_AND_PORT = "%s:81" % ipaddr
self.UNAME = uname


def getPage(self, url, kwargs, headers=None):
headers = headers or STANDARD_HEADERS
request = urllib2.Request(url, urllib.urlencode(kwargs), headers)
handle = urllib2.urlopen(request)
page = handle.read()
handle.close()
return page

def getValidationReportsPage(self): ########this works
self.getPage(HTTPS+self.SERVER_AND_PORT+"/cgi/listrpts.exe",{})

def login(self): #########this works
try: print self.getPage(HTTPS+self.SERVER_AND_PORT+"/cgi/mainhtml.exe",{})
except: print 'login failed'

def uploadFile(self, filepath): #????????????? need help here
buffer = open(filepath).read()
headers = dict(STANDARD_HEADERS) #make a copy
parms = ('file', filepath, buffer )
contenttype, body = webtools.encode_multipart_formdata([], [parms])
headers['Content-Type']= contenttype
data = {'file':body}
self.getPage(HTTPS+self.SERVER_AND_PORT+"/cgi/upload.exe",data,headers)



def unittest():
print 'start unittest of '+ __file__
X = MyConnection(uname=UNAME, password=PW)
X.login()
X.uploadFile('testdata/MouseMds.txt')

if __name__ == "__main__":
unittest()




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