Forcing TLS in Python's urllib2

urllib2_tls.py

# Python 2.6's urllib2 does not allow you to select the TLS dialect,
# and by default uses a SSLv23 compatibility negotiation implementation. 
# Besides being vulnerable to POODLE, the OSX implementation doesn't
# work correctly, failing to connect to servers that respond only to
# TLS1.0+. These classes help set up TLS support for urllib2.

class TLS1Connection(httplib.HTTPSConnection):
    """Like HTTPSConnection but more specific"""
    def __init__(self, host, **kwargs):
        httplib.HTTPSConnection.__init__(self, host, **kwargs)

    def connect(self):
        """Overrides HTTPSConnection.connect to specify TLS version"""
        # Standard implementation from HTTPSConnection, which is not
        # designed for extension, unfortunately
        sock = socket.create_connection((self.host, self.port),
                self.timeout, self.source_address)
        if getattr(self, '_tunnel_host', None):
            self.sock = sock
            self._tunnel()

        # This is the only difference; default wrap_socket uses SSLv23
        self.sock = ssl.wrap_socket(sock, self.key_file, self.cert_file,
                ssl_version=ssl.PROTOCOL_TLSv1)

class TLS1Handler(urllib2.HTTPSHandler):
    """Like HTTPSHandler but more specific"""
    def __init__(self):
        urllib2.HTTPSHandler.__init__(self)

    def https_open(self, req):
        return self.do_open(TLS1Connection, req)


# Override default handler
urllib2.install_opener(urllib2.build_opener(TLS1Handler()))

Thanks!

Note, remember to also import the following:

import httplib
import socket
import ssl

Thanks @flandr.

PS: Create a ticket with httplib to add support for specifying the SSL protocol:
https://github.com/jcgregorio/httplib2/issues/287

Awesome. But how might I use this with cookies and modified headers?

urllib2.install_opener(urllib2.build_opener(TLS1Handler()))

cj = cookielib.CookieJar()
opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
opener.addheaders = [('User-agent', 'Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.76 Safari/537.36')]

Thanks a lot!