bazarr/libs/requests_oauthlib/oauth1_session.py

397 lines
17 KiB
Python

from __future__ import unicode_literals
try:
from urlparse import urlparse
except ImportError:
from urllib.parse import urlparse
import logging
from oauthlib.common import add_params_to_uri
from oauthlib.common import urldecode as _urldecode
from oauthlib.oauth1 import (
SIGNATURE_HMAC, SIGNATURE_RSA, SIGNATURE_TYPE_AUTH_HEADER
)
import requests
from . import OAuth1
log = logging.getLogger(__name__)
def urldecode(body):
"""Parse query or json to python dictionary"""
try:
return _urldecode(body)
except:
import json
return json.loads(body)
class TokenRequestDenied(ValueError):
def __init__(self, message, response):
super(TokenRequestDenied, self).__init__(message)
self.response = response
@property
def status_code(self):
"""For backwards-compatibility purposes"""
return self.response.status_code
class TokenMissing(ValueError):
def __init__(self, message, response):
super(TokenMissing, self).__init__(message)
self.response = response
class VerifierMissing(ValueError):
pass
class OAuth1Session(requests.Session):
"""Request signing and convenience methods for the oauth dance.
What is the difference between OAuth1Session and OAuth1?
OAuth1Session actually uses OAuth1 internally and its purpose is to assist
in the OAuth workflow through convenience methods to prepare authorization
URLs and parse the various token and redirection responses. It also provide
rudimentary validation of responses.
An example of the OAuth workflow using a basic CLI app and Twitter.
>>> # Credentials obtained during the registration.
>>> client_key = 'client key'
>>> client_secret = 'secret'
>>> callback_uri = 'https://127.0.0.1/callback'
>>>
>>> # Endpoints found in the OAuth provider API documentation
>>> request_token_url = 'https://api.twitter.com/oauth/request_token'
>>> authorization_url = 'https://api.twitter.com/oauth/authorize'
>>> access_token_url = 'https://api.twitter.com/oauth/access_token'
>>>
>>> oauth_session = OAuth1Session(client_key,client_secret=client_secret, callback_uri=callback_uri)
>>>
>>> # First step, fetch the request token.
>>> oauth_session.fetch_request_token(request_token_url)
{
'oauth_token': 'kjerht2309u',
'oauth_token_secret': 'lsdajfh923874',
}
>>>
>>> # Second step. Follow this link and authorize
>>> oauth_session.authorization_url(authorization_url)
'https://api.twitter.com/oauth/authorize?oauth_token=sdf0o9823sjdfsdf&oauth_callback=https%3A%2F%2F127.0.0.1%2Fcallback'
>>>
>>> # Third step. Fetch the access token
>>> redirect_response = raw_input('Paste the full redirect URL here.')
>>> oauth_session.parse_authorization_response(redirect_response)
{
'oauth_token: 'kjerht2309u',
'oauth_token_secret: 'lsdajfh923874',
'oauth_verifier: 'w34o8967345',
}
>>> oauth_session.fetch_access_token(access_token_url)
{
'oauth_token': 'sdf0o9823sjdfsdf',
'oauth_token_secret': '2kjshdfp92i34asdasd',
}
>>> # Done. You can now make OAuth requests.
>>> status_url = 'http://api.twitter.com/1/statuses/update.json'
>>> new_status = {'status': 'hello world!'}
>>> oauth_session.post(status_url, data=new_status)
<Response [200]>
"""
def __init__(self, client_key,
client_secret=None,
resource_owner_key=None,
resource_owner_secret=None,
callback_uri=None,
signature_method=SIGNATURE_HMAC,
signature_type=SIGNATURE_TYPE_AUTH_HEADER,
rsa_key=None,
verifier=None,
client_class=None,
force_include_body=False,
**kwargs):
"""Construct the OAuth 1 session.
:param client_key: A client specific identifier.
:param client_secret: A client specific secret used to create HMAC and
plaintext signatures.
:param resource_owner_key: A resource owner key, also referred to as
request token or access token depending on
when in the workflow it is used.
:param resource_owner_secret: A resource owner secret obtained with
either a request or access token. Often
referred to as token secret.
:param callback_uri: The URL the user is redirect back to after
authorization.
:param signature_method: Signature methods determine how the OAuth
signature is created. The three options are
oauthlib.oauth1.SIGNATURE_HMAC (default),
oauthlib.oauth1.SIGNATURE_RSA and
oauthlib.oauth1.SIGNATURE_PLAIN.
:param signature_type: Signature type decides where the OAuth
parameters are added. Either in the
Authorization header (default) or to the URL
query parameters or the request body. Defined as
oauthlib.oauth1.SIGNATURE_TYPE_AUTH_HEADER,
oauthlib.oauth1.SIGNATURE_TYPE_QUERY and
oauthlib.oauth1.SIGNATURE_TYPE_BODY
respectively.
:param rsa_key: The private RSA key as a string. Can only be used with
signature_method=oauthlib.oauth1.SIGNATURE_RSA.
:param verifier: A verifier string to prove authorization was granted.
:param client_class: A subclass of `oauthlib.oauth1.Client` to use with
`requests_oauthlib.OAuth1` instead of the default
:param force_include_body: Always include the request body in the
signature creation.
:param **kwargs: Additional keyword arguments passed to `OAuth1`
"""
super(OAuth1Session, self).__init__()
self._client = OAuth1(client_key,
client_secret=client_secret,
resource_owner_key=resource_owner_key,
resource_owner_secret=resource_owner_secret,
callback_uri=callback_uri,
signature_method=signature_method,
signature_type=signature_type,
rsa_key=rsa_key,
verifier=verifier,
client_class=client_class,
force_include_body=force_include_body,
**kwargs)
self.auth = self._client
@property
def token(self):
oauth_token = self._client.client.resource_owner_key
oauth_token_secret = self._client.client.resource_owner_secret
oauth_verifier = self._client.client.verifier
token_dict = {}
if oauth_token:
token_dict["oauth_token"] = oauth_token
if oauth_token_secret:
token_dict["oauth_token_secret"] = oauth_token_secret
if oauth_verifier:
token_dict["oauth_verifier"] = oauth_verifier
return token_dict
@token.setter
def token(self, value):
self._populate_attributes(value)
@property
def authorized(self):
"""Boolean that indicates whether this session has an OAuth token
or not. If `self.authorized` is True, you can reasonably expect
OAuth-protected requests to the resource to succeed. If
`self.authorized` is False, you need the user to go through the OAuth
authentication dance before OAuth-protected requests to the resource
will succeed.
"""
if self._client.client.signature_method == SIGNATURE_RSA:
# RSA only uses resource_owner_key
return bool(self._client.client.resource_owner_key)
else:
# other methods of authentication use all three pieces
return (
bool(self._client.client.client_secret) and
bool(self._client.client.resource_owner_key) and
bool(self._client.client.resource_owner_secret)
)
def authorization_url(self, url, request_token=None, **kwargs):
"""Create an authorization URL by appending request_token and optional
kwargs to url.
This is the second step in the OAuth 1 workflow. The user should be
redirected to this authorization URL, grant access to you, and then
be redirected back to you. The redirection back can either be specified
during client registration or by supplying a callback URI per request.
:param url: The authorization endpoint URL.
:param request_token: The previously obtained request token.
:param kwargs: Optional parameters to append to the URL.
:returns: The authorization URL with new parameters embedded.
An example using a registered default callback URI.
>>> request_token_url = 'https://api.twitter.com/oauth/request_token'
>>> authorization_url = 'https://api.twitter.com/oauth/authorize'
>>> oauth_session = OAuth1Session('client-key', client_secret='secret')
>>> oauth_session.fetch_request_token(request_token_url)
{
'oauth_token': 'sdf0o9823sjdfsdf',
'oauth_token_secret': '2kjshdfp92i34asdasd',
}
>>> oauth_session.authorization_url(authorization_url)
'https://api.twitter.com/oauth/authorize?oauth_token=sdf0o9823sjdfsdf'
>>> oauth_session.authorization_url(authorization_url, foo='bar')
'https://api.twitter.com/oauth/authorize?oauth_token=sdf0o9823sjdfsdf&foo=bar'
An example using an explicit callback URI.
>>> request_token_url = 'https://api.twitter.com/oauth/request_token'
>>> authorization_url = 'https://api.twitter.com/oauth/authorize'
>>> oauth_session = OAuth1Session('client-key', client_secret='secret', callback_uri='https://127.0.0.1/callback')
>>> oauth_session.fetch_request_token(request_token_url)
{
'oauth_token': 'sdf0o9823sjdfsdf',
'oauth_token_secret': '2kjshdfp92i34asdasd',
}
>>> oauth_session.authorization_url(authorization_url)
'https://api.twitter.com/oauth/authorize?oauth_token=sdf0o9823sjdfsdf&oauth_callback=https%3A%2F%2F127.0.0.1%2Fcallback'
"""
kwargs['oauth_token'] = request_token or self._client.client.resource_owner_key
log.debug('Adding parameters %s to url %s', kwargs, url)
return add_params_to_uri(url, kwargs.items())
def fetch_request_token(self, url, realm=None, **request_kwargs):
"""Fetch a request token.
This is the first step in the OAuth 1 workflow. A request token is
obtained by making a signed post request to url. The token is then
parsed from the application/x-www-form-urlencoded response and ready
to be used to construct an authorization url.
:param url: The request token endpoint URL.
:param realm: A list of realms to request access to.
:param \*\*request_kwargs: Optional arguments passed to ''post''
function in ''requests.Session''
:returns: The response in dict format.
Note that a previously set callback_uri will be reset for your
convenience, or else signature creation will be incorrect on
consecutive requests.
>>> request_token_url = 'https://api.twitter.com/oauth/request_token'
>>> oauth_session = OAuth1Session('client-key', client_secret='secret')
>>> oauth_session.fetch_request_token(request_token_url)
{
'oauth_token': 'sdf0o9823sjdfsdf',
'oauth_token_secret': '2kjshdfp92i34asdasd',
}
"""
self._client.client.realm = ' '.join(realm) if realm else None
token = self._fetch_token(url, **request_kwargs)
log.debug('Resetting callback_uri and realm (not needed in next phase).')
self._client.client.callback_uri = None
self._client.client.realm = None
return token
def fetch_access_token(self, url, verifier=None, **request_kwargs):
"""Fetch an access token.
This is the final step in the OAuth 1 workflow. An access token is
obtained using all previously obtained credentials, including the
verifier from the authorization step.
Note that a previously set verifier will be reset for your
convenience, or else signature creation will be incorrect on
consecutive requests.
>>> access_token_url = 'https://api.twitter.com/oauth/access_token'
>>> redirect_response = 'https://127.0.0.1/callback?oauth_token=kjerht2309uf&oauth_token_secret=lsdajfh923874&oauth_verifier=w34o8967345'
>>> oauth_session = OAuth1Session('client-key', client_secret='secret')
>>> oauth_session.parse_authorization_response(redirect_response)
{
'oauth_token: 'kjerht2309u',
'oauth_token_secret: 'lsdajfh923874',
'oauth_verifier: 'w34o8967345',
}
>>> oauth_session.fetch_access_token(access_token_url)
{
'oauth_token': 'sdf0o9823sjdfsdf',
'oauth_token_secret': '2kjshdfp92i34asdasd',
}
"""
if verifier:
self._client.client.verifier = verifier
if not getattr(self._client.client, 'verifier', None):
raise VerifierMissing('No client verifier has been set.')
token = self._fetch_token(url, **request_kwargs)
log.debug('Resetting verifier attribute, should not be used anymore.')
self._client.client.verifier = None
return token
def parse_authorization_response(self, url):
"""Extract parameters from the post authorization redirect response URL.
:param url: The full URL that resulted from the user being redirected
back from the OAuth provider to you, the client.
:returns: A dict of parameters extracted from the URL.
>>> redirect_response = 'https://127.0.0.1/callback?oauth_token=kjerht2309uf&oauth_token_secret=lsdajfh923874&oauth_verifier=w34o8967345'
>>> oauth_session = OAuth1Session('client-key', client_secret='secret')
>>> oauth_session.parse_authorization_response(redirect_response)
{
'oauth_token: 'kjerht2309u',
'oauth_token_secret: 'lsdajfh923874',
'oauth_verifier: 'w34o8967345',
}
"""
log.debug('Parsing token from query part of url %s', url)
token = dict(urldecode(urlparse(url).query))
log.debug('Updating internal client token attribute.')
self._populate_attributes(token)
self.token = token
return token
def _populate_attributes(self, token):
if 'oauth_token' in token:
self._client.client.resource_owner_key = token['oauth_token']
else:
raise TokenMissing(
'Response does not contain a token: {resp}'.format(resp=token),
token,
)
if 'oauth_token_secret' in token:
self._client.client.resource_owner_secret = (
token['oauth_token_secret'])
if 'oauth_verifier' in token:
self._client.client.verifier = token['oauth_verifier']
def _fetch_token(self, url, **request_kwargs):
log.debug('Fetching token from %s using client %s', url, self._client.client)
r = self.post(url, **request_kwargs)
if r.status_code >= 400:
error = "Token request failed with code %s, response was '%s'."
raise TokenRequestDenied(error % (r.status_code, r.text), r)
log.debug('Decoding token from response "%s"', r.text)
try:
token = dict(urldecode(r.text.strip()))
except ValueError as e:
error = ("Unable to decode token from token response. "
"This is commonly caused by an unsuccessful request where"
" a non urlencoded error message is returned. "
"The decoding error was %s""" % e)
raise ValueError(error)
log.debug('Obtained token %s', token)
log.debug('Updating internal client attributes from token data.')
self._populate_attributes(token)
self.token = token
return token
def rebuild_auth(self, prepared_request, response):
"""
When being redirected we should always strip Authorization
header, since nonce may not be reused as per OAuth spec.
"""
if 'Authorization' in prepared_request.headers:
# If we get redirected to a new host, we should strip out
# any authentication headers.
prepared_request.headers.pop('Authorization', True)
prepared_request.prepare_auth(self.auth)
return