I'm trying to make script that check for the web page if it requires a basic http authentication or not before executing the needed command .
I'm sorry but i don't understand the libraries and the commands related to this check at python , I tried to search for it but failed to find any useful info .
For example I need the script to check the page www.google.com if it is gonna ask for credentials to view the page or not then complete the command.
If a server expects the client to use basic authentication, it'll respond to a request without such authentication with a WWW-Authenticate header, containing the word 'Basic'. See the Basic Authentication Scheme section of the HTTP RFC.
Using the standard Python libraries, you can test for that with:
from urllib2 import urlopen, HTTPError
try:
response = urlopen(url)
except HTTPError as exc:
# A 401 unauthorized will raise an exception
response = exc
auth = response.info().getheader('WWW-Authenticate')
if auth and auth.lower().startswith('basic'):
print "Requesting {} requires basic authentication".format(url)
Demo:
>>> from urllib2 import urlopen, HTTPError
>>> url = 'http://httpbin.org/basic-auth/user/passwd'
>>> try:
... response = urlopen(url)
... except HTTPError as exc:
... # A 401 unauthorized will raise an exception
... response = exc
...
>>> auth = response.info().getheader('WWW-Authenticate')
>>> if auth and auth.lower().startswith('basic'):
... print "Requesting {} requires basic authentication".format(url)
...
Requesting http://httpbin.org/basic-auth/user/passwd requires basic authentication
To add a timeout to the request as well, use:
from urllib2 import urlopen, HTTPError
import socket
response = None
try:
response = urlopen(url, timeout=15)
except HTTPError as exc:
# A 401 unauthorized will raise an exception
response = exc
except socket.timeout:
print "Request timed out"
auth = response and response.info().getheader('WWW-Authenticate')
if auth and auth.lower().startswith('basic'):
print "Requesting {} requires basic authentication".format(url)
urlopen(url, timeout=15) for a timeout of 15 seconds.socket.timeout exception; you'll have to import that and handle it separately.