Python Language Authentication


Simple HTTP Authentication

Simple HTTP Authentication can be achieved with the following:

from requests import post

foo = post('', auth=('natas0', 'natas0'))

This is technically short hand for the following:

from requests import post
from requests.auth import HTTPBasicAuth

foo = post('', auth=HTTPBasicAuth('natas0', 'natas0'))

HTTP Digest Authentication

HTTP Digest Authentication is done in a very similar way, Requests provides a different object for this:

from requests import post
from requests.auth import HTTPDigestAuth

foo = post('', auth=HTTPDigestAuth('natas0', 'natas0'))

Custom Authentication

In some cases the built in authentication mechanisms may not be enough, imagine this example:

A server is configured to accept authentication if the sender has the correct user-agent string, a certain header value and supplies the correct credentials through HTTP Basic Authentication. To achieve this a custom authentication class should be prepared, subclassing AuthBase, which is the base for Requests authentication implementations:

from requests.auth import AuthBase
from requests.auth import _basic_auth_str
from requests._internal_utils import to_native_string

class CustomAuth(AuthBase):

    def __init__(self, secret_header, user_agent , username, password):
        # setup any auth-related data here
        self.secret_header =  secret_header
        self.user_agent = user_agent
        self.username = username
        self.password = password

    def __call__(self, r):
        # modify and return the request
        r.headers['X-Secret'] = self.secret_header
        r.headers['User-Agent'] = self.user_agent
        r.headers['Authorization'] = _basic_auth_str(self.username, self.password)
        return r

This can then be utilized with the following code:

foo = get('', auth=CustomAuth('SecretHeader', 'CustomUserAgent', 'user', 'password' ))