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Include oauthlib module

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JonnyWong16 2016-05-15 10:15:44 -07:00
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lib/oauthlib/oauth2/rfc6749/parameters.py Normal file
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# -*- coding: utf-8 -*-
"""
oauthlib.oauth2.rfc6749.parameters
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This module contains methods related to `Section 4`_ of the OAuth 2 RFC.
.. _`Section 4`: http://tools.ietf.org/html/rfc6749#section-4
"""
from __future__ import absolute_import, unicode_literals
import json
import os
import time
try:
import urlparse
except ImportError:
import urllib.parse as urlparse
from oauthlib.common import add_params_to_uri, add_params_to_qs, unicode_type
from oauthlib.signals import scope_changed
from .errors import raise_from_error, MissingTokenError, MissingTokenTypeError
from .errors import MismatchingStateError, MissingCodeError
from .errors import InsecureTransportError
from .tokens import OAuth2Token
from .utils import list_to_scope, scope_to_list, is_secure_transport
def prepare_grant_uri(uri, client_id, response_type, redirect_uri=None,
scope=None, state=None, **kwargs):
"""Prepare the authorization grant request URI.
The client constructs the request URI by adding the following
parameters to the query component of the authorization endpoint URI
using the ``application/x-www-form-urlencoded`` format as defined by
[`W3C.REC-html401-19991224`_]:
:param response_type: To indicate which OAuth 2 grant/flow is required,
"code" and "token".
:param client_id: The client identifier as described in `Section 2.2`_.
:param redirect_uri: The client provided URI to redirect back to after
authorization as described in `Section 3.1.2`_.
:param scope: The scope of the access request as described by
`Section 3.3`_.
:param state: An opaque value used by the client to maintain
state between the request and callback. The authorization
server includes this value when redirecting the user-agent
back to the client. The parameter SHOULD be used for
preventing cross-site request forgery as described in
`Section 10.12`_.
:param kwargs: Extra arguments to embed in the grant/authorization URL.
An example of an authorization code grant authorization URL:
.. code-block:: http
GET /authorize?response_type=code&client_id=s6BhdRkqt3&state=xyz
&redirect_uri=https%3A%2F%2Fclient%2Eexample%2Ecom%2Fcb HTTP/1.1
Host: server.example.com
.. _`W3C.REC-html401-19991224`: http://tools.ietf.org/html/rfc6749#ref-W3C.REC-html401-19991224
.. _`Section 2.2`: http://tools.ietf.org/html/rfc6749#section-2.2
.. _`Section 3.1.2`: http://tools.ietf.org/html/rfc6749#section-3.1.2
.. _`Section 3.3`: http://tools.ietf.org/html/rfc6749#section-3.3
.. _`section 10.12`: http://tools.ietf.org/html/rfc6749#section-10.12
"""
if not is_secure_transport(uri):
raise InsecureTransportError()
params = [(('response_type', response_type)),
(('client_id', client_id))]
if redirect_uri:
params.append(('redirect_uri', redirect_uri))
if scope:
params.append(('scope', list_to_scope(scope)))
if state:
params.append(('state', state))
for k in kwargs:
if kwargs[k]:
params.append((unicode_type(k), kwargs[k]))
return add_params_to_uri(uri, params)
def prepare_token_request(grant_type, body='', **kwargs):
"""Prepare the access token request.
The client makes a request to the token endpoint by adding the
following parameters using the ``application/x-www-form-urlencoded``
format in the HTTP request entity-body:
:param grant_type: To indicate grant type being used, i.e. "password",
"authorization_code" or "client_credentials".
:param body: Existing request body to embed parameters in.
:param code: If using authorization code grant, pass the previously
obtained authorization code as the ``code`` argument.
:param redirect_uri: If the "redirect_uri" parameter was included in the
authorization request as described in
`Section 4.1.1`_, and their values MUST be identical.
:param kwargs: Extra arguments to embed in the request body.
An example of an authorization code token request body:
.. code-block:: http
grant_type=authorization_code&code=SplxlOBeZQQYbYS6WxSbIA
&redirect_uri=https%3A%2F%2Fclient%2Eexample%2Ecom%2Fcb
.. _`Section 4.1.1`: http://tools.ietf.org/html/rfc6749#section-4.1.1
"""
params = [('grant_type', grant_type)]
if 'scope' in kwargs:
kwargs['scope'] = list_to_scope(kwargs['scope'])
for k in kwargs:
if kwargs[k]:
params.append((unicode_type(k), kwargs[k]))
return add_params_to_qs(body, params)
def prepare_token_revocation_request(url, token, token_type_hint="access_token",
callback=None, body='', **kwargs):
"""Prepare a token revocation request.
The client constructs the request by including the following parameters
using the "application/x-www-form-urlencoded" format in the HTTP request
entity-body:
token REQUIRED. The token that the client wants to get revoked.
token_type_hint OPTIONAL. A hint about the type of the token submitted
for revocation. Clients MAY pass this parameter in order to help the
authorization server to optimize the token lookup. If the server is unable
to locate the token using the given hint, it MUST extend its search across
all of its supported token types. An authorization server MAY ignore this
parameter, particularly if it is able to detect the token type
automatically. This specification defines two such values:
* access_token: An access token as defined in [RFC6749],
`Section 1.4`_
* refresh_token: A refresh token as defined in [RFC6749],
`Section 1.5`_
Specific implementations, profiles, and extensions of this
specification MAY define other values for this parameter using the
registry defined in `Section 4.1.2`_.
.. _`Section 1.4`: http://tools.ietf.org/html/rfc6749#section-1.4
.. _`Section 1.5`: http://tools.ietf.org/html/rfc6749#section-1.5
.. _`Section 4.1.2`: http://tools.ietf.org/html/rfc7009#section-4.1.2
"""
if not is_secure_transport(url):
raise InsecureTransportError()
params = [('token', token)]
if token_type_hint:
params.append(('token_type_hint', token_type_hint))
for k in kwargs:
if kwargs[k]:
params.append((unicode_type(k), kwargs[k]))
headers = {'Content-Type': 'application/x-www-form-urlencoded'}
if callback:
params.append(('callback', callback))
return add_params_to_uri(url, params), headers, body
else:
return url, headers, add_params_to_qs(body, params)
def parse_authorization_code_response(uri, state=None):
"""Parse authorization grant response URI into a dict.
If the resource owner grants the access request, the authorization
server issues an authorization code and delivers it to the client by
adding the following parameters to the query component of the
redirection URI using the ``application/x-www-form-urlencoded`` format:
**code**
REQUIRED. The authorization code generated by the
authorization server. The authorization code MUST expire
shortly after it is issued to mitigate the risk of leaks. A
maximum authorization code lifetime of 10 minutes is
RECOMMENDED. The client MUST NOT use the authorization code
more than once. If an authorization code is used more than
once, the authorization server MUST deny the request and SHOULD
revoke (when possible) all tokens previously issued based on
that authorization code. The authorization code is bound to
the client identifier and redirection URI.
**state**
REQUIRED if the "state" parameter was present in the client
authorization request. The exact value received from the
client.
:param uri: The full redirect URL back to the client.
:param state: The state parameter from the authorization request.
For example, the authorization server redirects the user-agent by
sending the following HTTP response:
.. code-block:: http
HTTP/1.1 302 Found
Location: https://client.example.com/cb?code=SplxlOBeZQQYbYS6WxSbIA
&state=xyz
"""
if not is_secure_transport(uri):
raise InsecureTransportError()
query = urlparse.urlparse(uri).query
params = dict(urlparse.parse_qsl(query))
if not 'code' in params:
raise MissingCodeError("Missing code parameter in response.")
if state and params.get('state', None) != state:
raise MismatchingStateError()
return params
def parse_implicit_response(uri, state=None, scope=None):
"""Parse the implicit token response URI into a dict.
If the resource owner grants the access request, the authorization
server issues an access token and delivers it to the client by adding
the following parameters to the fragment component of the redirection
URI using the ``application/x-www-form-urlencoded`` format:
**access_token**
REQUIRED. The access token issued by the authorization server.
**token_type**
REQUIRED. The type of the token issued as described in
Section 7.1. Value is case insensitive.
**expires_in**
RECOMMENDED. The lifetime in seconds of the access token. For
example, the value "3600" denotes that the access token will
expire in one hour from the time the response was generated.
If omitted, the authorization server SHOULD provide the
expiration time via other means or document the default value.
**scope**
OPTIONAL, if identical to the scope requested by the client,
otherwise REQUIRED. The scope of the access token as described
by Section 3.3.
**state**
REQUIRED if the "state" parameter was present in the client
authorization request. The exact value received from the
client.
Similar to the authorization code response, but with a full token provided
in the URL fragment:
.. code-block:: http
HTTP/1.1 302 Found
Location: http://example.com/cb#access_token=2YotnFZFEjr1zCsicMWpAA
&state=xyz&token_type=example&expires_in=3600
"""
if not is_secure_transport(uri):
raise InsecureTransportError()
fragment = urlparse.urlparse(uri).fragment
params = dict(urlparse.parse_qsl(fragment, keep_blank_values=True))
if 'scope' in params:
params['scope'] = scope_to_list(params['scope'])
if 'expires_in' in params:
params['expires_at'] = time.time() + int(params['expires_in'])
if state and params.get('state', None) != state:
raise ValueError("Mismatching or missing state in params.")
params = OAuth2Token(params, old_scope=scope)
validate_token_parameters(params)
return params
def parse_token_response(body, scope=None):
"""Parse the JSON token response body into a dict.
The authorization server issues an access token and optional refresh
token, and constructs the response by adding the following parameters
to the entity body of the HTTP response with a 200 (OK) status code:
access_token
REQUIRED. The access token issued by the authorization server.
token_type
REQUIRED. The type of the token issued as described in
`Section 7.1`_. Value is case insensitive.
expires_in
RECOMMENDED. The lifetime in seconds of the access token. For
example, the value "3600" denotes that the access token will
expire in one hour from the time the response was generated.
If omitted, the authorization server SHOULD provide the
expiration time via other means or document the default value.
refresh_token
OPTIONAL. The refresh token which can be used to obtain new
access tokens using the same authorization grant as described
in `Section 6`_.
scope
OPTIONAL, if identical to the scope requested by the client,
otherwise REQUIRED. The scope of the access token as described
by `Section 3.3`_.
The parameters are included in the entity body of the HTTP response
using the "application/json" media type as defined by [`RFC4627`_]. The
parameters are serialized into a JSON structure by adding each
parameter at the highest structure level. Parameter names and string
values are included as JSON strings. Numerical values are included
as JSON numbers. The order of parameters does not matter and can
vary.
:param body: The full json encoded response body.
:param scope: The scope requested during authorization.
For example:
.. code-block:: http
HTTP/1.1 200 OK
Content-Type: application/json
Cache-Control: no-store
Pragma: no-cache
{
"access_token":"2YotnFZFEjr1zCsicMWpAA",
"token_type":"example",
"expires_in":3600,
"refresh_token":"tGzv3JOkF0XG5Qx2TlKWIA",
"example_parameter":"example_value"
}
.. _`Section 7.1`: http://tools.ietf.org/html/rfc6749#section-7.1
.. _`Section 6`: http://tools.ietf.org/html/rfc6749#section-6
.. _`Section 3.3`: http://tools.ietf.org/html/rfc6749#section-3.3
.. _`RFC4627`: http://tools.ietf.org/html/rfc4627
"""
try:
params = json.loads(body)
except ValueError:
# Fall back to URL-encoded string, to support old implementations,
# including (at time of writing) Facebook. See:
# https://github.com/idan/oauthlib/issues/267
params = dict(urlparse.parse_qsl(body))
for key in ('expires_in', 'expires'):
if key in params: # cast a couple things to int
params[key] = int(params[key])
if 'scope' in params:
params['scope'] = scope_to_list(params['scope'])
if 'expires' in params:
params['expires_in'] = params.pop('expires')
if 'expires_in' in params:
params['expires_at'] = time.time() + int(params['expires_in'])
params = OAuth2Token(params, old_scope=scope)
validate_token_parameters(params)
return params
def validate_token_parameters(params):
"""Ensures token precence, token type, expiration and scope in params."""
if 'error' in params:
raise_from_error(params.get('error'), params)
if not 'access_token' in params:
raise MissingTokenError(description="Missing access token parameter.")
if not 'token_type' in params:
if os.environ.get('OAUTHLIB_STRICT_TOKEN_TYPE'):
raise MissingTokenTypeError()
# If the issued access token scope is different from the one requested by
# the client, the authorization server MUST include the "scope" response
# parameter to inform the client of the actual scope granted.
# http://tools.ietf.org/html/rfc6749#section-3.3
if params.scope_changed:
message = 'Scope has changed from "{old}" to "{new}".'.format(
old=params.old_scope, new=params.scope,
)
scope_changed.send(message=message, old=params.old_scopes, new=params.scopes)
if not os.environ.get('OAUTHLIB_RELAX_TOKEN_SCOPE', None):
w = Warning(message)
w.token = params
w.old_scope = params.old_scopes
w.new_scope = params.scopes
raise w