# I wanted to touch a particular web page (in order to open/
# close a database connection inside of Zope) so I came
# up with this module which uses urllib2 to make the
# web connection
#
# I was not sure what a 'realm' was, so first I made the
# HTTPRealmFinder to find out what the realm is.
# The HTTPinger calls my required page and acts according
# to the http return code.
import urllib2
from urlparse import urlparse
class HTTPinger:
def ping(self, url, webuser, webpass):
scheme, domain, path, x1, x2, x3 = urlparse(url)
finder = HTTPRealmFinder(url)
realm = finder.get()
handler = urllib2.HTTPBasicAuthHandler()
handler.add_password(realm, domain, webuser, webpass)
opener = urllib2.build_opener(handler)
urllib2.install_opener(opener)
try:
urllib2.urlopen(url)
except urllib2.HTTPError, e:
if e.code == 401:
print 'not authorized'
elif e.code == 404:
print 'not found'
elif e.code == 503:
print 'service unavailable'
else:
print 'unknown error: '
else:
print 'success'
class HTTPRealmFinderHandler(urllib2.HTTPBasicAuthHandler):
def http_error_401(self, req, fp, code, msg, headers):
realm_string = headers['www-authenticate']
q1 = realm_string.find('"')
q2 = realm_string.find('"', q1+1)
realm = realm_string[q1+1:q2]
self.realm = realm
class HTTPRealmFinder:
def __init__(self, url):
self.url = url
scheme, domain, path, x1, x2, x3 = urlparse(url)
handler = HTTPRealmFinderHandler()
handler.add_password(None, domain, 'foo', 'bar')
self.handler = handler
opener = urllib2.build_opener(handler)
urllib2.install_opener(opener)
def ping(self, url):
try:
urllib2.urlopen(url)
except urllib2.HTTPError, e:
pass
def get(self):
self.ping(self.url)
try:
realm = self.handler.realm
except AttributeError:
realm = None
return realm
def prt(self):
print self.get()
if __name__ == '__main__':
pinger = HTTPinger()
pinger.ping('https://example.com/nonexistent/path', 'username', 'password')
pinger = HTTPinger()
pinger.ping('https://example.com/basic/auth/protected/path', 'username', 'password')
finder = HTTPRealmFinder('https://example.com/basic/auth/protected/path')
finder.prt()
