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# -*- coding: utf-8 -*-
import requests
from collections import Callable
from . import __version__
from logging import getLogger
from contextlib import contextmanager
__url_cache__ = {}
__logs__ = getLogger(__package__)
def requires_2fa(response):
if (response.status_code == 401 and 'X-GitHub-OTP' in response.headers and
'required' in response.headers['X-GitHub-OTP']):
return True
return False
class TokenAuth(requests.auth.AuthBase):
def __init__(self, token):
self.token = token
def __ne__(self, other):
return not self == other
def __eq__(self, other):
return self.token == getattr(other, 'token', None)
def __call__(self, request):
request.headers['Authorization'] = 'token {}'.format(self.token)
return request
class GitHubSession(requests.Session):
auth = None
__attrs__ = requests.Session.__attrs__ + ['base_url', 'two_factor_auth_cb']
def __init__(self):
super(GitHubSession, self).__init__()
self.headers.update({
# Only accept JSON responses
'Accept': 'application/vnd.github.v3.full+json',
# Only accept UTF-8 encoded data
'Accept-Charset': 'utf-8',
# Always sending JSON
'Content-Type': "application/json",
# Set our own custom User-Agent string
'User-Agent': 'github3.py/{0}'.format(__version__),
})
self.base_url = 'https://api.github.com'
self.two_factor_auth_cb = None
self.request_counter = 0
def basic_auth(self, username, password):
"""Set the Basic Auth credentials on this Session.
:param str username: Your GitHub username
:param str password: Your GitHub password
"""
if not (username and password):
return
self.auth = (username, password)
def build_url(self, *args, **kwargs):
"""Builds a new API url from scratch."""
parts = [kwargs.get('base_url') or self.base_url]
parts.extend(args)
parts = [str(p) for p in parts]
key = tuple(parts)
__logs__.info('Building a url from %s', key)
if key not in __url_cache__:
__logs__.info('Missed the cache building the url')
__url_cache__[key] = '/'.join(parts)
return __url_cache__[key]
def handle_two_factor_auth(self, args, kwargs):
headers = kwargs.pop('headers', {})
headers.update({
'X-GitHub-OTP': str(self.two_factor_auth_cb())
})
kwargs.update(headers=headers)
return super(GitHubSession, self).request(*args, **kwargs)
def has_auth(self):
return (self.auth or self.headers.get('Authorization'))
def oauth2_auth(self, client_id, client_secret):
"""Use OAuth2 for authentication.
It is suggested you install requests-oauthlib to use this.
:param str client_id: Client ID retrieved from GitHub
:param str client_secret: Client secret retrieved from GitHub
"""
raise NotImplementedError('These features are not implemented yet')
def request(self, *args, **kwargs):
response = super(GitHubSession, self).request(*args, **kwargs)
self.request_counter += 1
if requires_2fa(response) and self.two_factor_auth_cb:
# No need to flatten and re-collect the args in
# handle_two_factor_auth
new_response = self.handle_two_factor_auth(args, kwargs)
new_response.history.append(response)
response = new_response
return response
def retrieve_client_credentials(self):
"""Return the client credentials.
:returns: tuple(client_id, client_secret)
"""
client_id = self.params.get('client_id')
client_secret = self.params.get('client_secret')
return (client_id, client_secret)
def two_factor_auth_callback(self, callback):
if not callback:
return
if not isinstance(callback, Callable):
raise ValueError('Your callback should be callable')
self.two_factor_auth_cb = callback
def token_auth(self, token):
"""Use an application token for authentication.
:param str token: Application token retrieved from GitHub's
/authorizations endpoint
"""
if not token:
return
self.auth = TokenAuth(token)
@contextmanager
def temporary_basic_auth(self, *auth):
old_basic_auth = self.auth
old_token_auth = self.headers.get('Authorization')
self.basic_auth(*auth)
yield
self.auth = old_basic_auth
if old_token_auth:
self.headers['Authorization'] = old_token_auth
@contextmanager
def no_auth(self):
"""Unset authentication temporarily as a context manager."""
old_basic_auth, self.auth = self.auth, None
old_token_auth = self.headers.pop('Authorization', None)
yield
self.auth = old_basic_auth
if old_token_auth:
self.headers['Authorization'] = old_token_auth