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Date: Thu, 9 Jun 2011 12:30:04 -0700
Subject: urllib2 opendirector versus request object
From: Dennis <daodennis@gmail.com>
To: python-list@python.org
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Hi,

I was wondering what the difference or advantages to using an
opendirector with handlers or using a request object?

I am having an issue where when I use the open director and I try to
add headers it adds them after the connection-close header, but when I
use the request object it does not.

Here is the headers as reported by python:
send: 'POST /xml-api/listaccts HTTP/1.1\r\nAccept-Encoding:
identity\r\nContent-Length: 13\r\nHost:
cpanel01.sea.fibercloud.com:2086\r\nContent-Type:
application/x-www-form-urlencoded\r\nConnection: close\r\nUser-Agent:
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv,1.9.2.13)
Gecko/20101203 Firefox/3.6.13\r\n\r\n'
send: 'domain=anjopa'
reply: 'HTTP/1.1 403 Forbidden\r\n'
header: Connection: close
header: Server: cpsrvd/11.30.0.27
header: Content-type: text/xml

Next two examples one with Request object and the next with the open director,

#!/usr/bin/python
import sys
from xml.dom.minidom import parse, parseString
import urllib
import urllib2
import base64
from cookielib import CookieJar

# Turn on HTTP debugging
http://diveintopython.org/http_web_services/user_agent.html
import httplib



#With Request object:

  req = urllib2.Request(url, {},{'Authorization':'Basic ' +
base64.b64encode( username + ':' + password ) } )
  res = urllib2.urlopen(req)
  print res.read()

With open director:
  # Instantiate and Initialize AuthInfo Handler for use w/ the build_opener

    authinfo = urllib2.HTTPBasicAuthHandler()
    authinfo.add_password(realm="Web Host Manager",
                        uri="http://servername:2086/xml-api/listacct",
                        user="username",
                        passwd="password")

    # Instantiate Cookie jar Handler for use w/ build_opener

    cj = CookieJar()

    # Create an opener object from list of handlers above
    opener = urllib2.build_opener(authinfo,urllib2.HTTPCookieProcessor(cj),
urllib2.HTTPHandler(debuglevel=1))
    urllib2.install_opener(opener)

    opener.addheaders = [('User-Agent', 'Mozilla/5.0 (Windows; U;
Windows NT 6.1; en-US; rv,1.9.2.13) Gecko/20101203 Firefox/3.6.13')]
    response = opener.open(url, paramaters)





Dennis O.