title: Python urllib3 and how to handle cookie support?
body: <p>So I'm looking into <a href="http://code.google.com/p/urllib3/" rel="noreferrer">urllib3</a> because it has connection pooling and is thread safe (so performance is better, especially for crawling), but the documentation is... minimal to say the least. urllib2 has build_opener so something like:</p>
  
  <pre><code>#!/usr/bin/python
  import cookielib, urllib2
  cj = cookielib.CookieJar()
  opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
  r = opener.open("http://example.com/")
  </code></pre>
  
  <p>But urllib3 has no build_opener method, so the only way I have figured out so far is to manually put it in the header:</p>
  
  <pre><code>#!/usr/bin/python
  import urllib3
  http_pool = urllib3.connection_from_url("http://example.com")
  myheaders = {'Cookie':'some cookie data'}
  r = http_pool.get_url("http://example.org/", headers=myheaders)
  </code></pre>
  
  <p>But I am hoping there is a better way and that one of you can tell me what it is. Also can someone tag this with "urllib3" please.</p>