Why is ClientCookie/urllib2 using https?

[Grant Edwards]

In the program shown below, all of the connections to the
servers are using port 443 and https (TLS protocol) -- both the
initial connection to login.postini.com and subsequent
connections to user-3.postini.com.

It works, and I don't mind that it's encrypting the sessions as
well as the login, but I'd like understand why the connections
to "http://user-3.postini.com/exec/MsgCtr" are being done using
TLS to port 443 instead of raw TCP to port 80 as is implied by
the http: in the URL.

FWIW, it's a program to delete quarantined viruse-laden
messages from the server run by the Postini mail-filtering
service. Viruses can only be deleted 10 at a time, and when
you've got 7000 of them, that's a hell of a lot of mouse
clicks. When they're coming in 200-300 an hour, automating the
deleting process was the only reasonable solution.

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import re,sys
import ClientCookie
import urllib,urllib2

postData = urllib.urlencode({
'remember':'1',
'action':'login',
'email':sys.argv[1],
'pword':sys.argv[2]})

req1 = urllib2.Request("https://login.postini.com/exec/login",data=postData)
rsp1 = ClientCookie.urlopen(req1)

req2 = urllib2.Request("http://user-3.postini.com/exec/MsgCtr")
rsp2 = ClientCookie.urlopen(req2)

while 1:
data = rsp2.read()

m = re.search('<form name=virus .*</form>',data,re.M|re.S)
if not m:
print "no virus form found"
sys.exit()
vdata = m.group()

m = re.search('Message 1 - [0-9]+ of [0-9]+',vdata,re.M|re.S)
if not m:
print "did not find message count"
sys.exit()
print m.group()

r = re.compile('<input type="checkbox" name="msgid" value="([^"]*)">',re.M|re.S)
m = r.findall(vdata)

if not m:
print "no virus msgids found"
sys.exit()

postData = urllib.urlencode({'submit':'Remove','disp':'M','action':'change_Msgs'})
for msgid in m:
postData += "&msgid="+msgid

req2 = urllib2.Request("http://user-3.postini.com/exec/MsgCtr",postData)
rsp2 = ClientCookie.urlopen(req2)

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