X-Git-Url: https://projects.mako.cc/source/twitter-api-cdsw-solutions/blobdiff_plain/5f84907a072eb4dd4b58dce2634f24ede6181eb8..b5d973d7a0a14eca21b2981ffacf4fb9ea77ba41:/oauthlib/oauth2/rfc6749/grant_types/base.py

diff --git a/oauthlib/oauth2/rfc6749/grant_types/base.py b/oauthlib/oauth2/rfc6749/grant_types/base.py
new file mode 100644
index 0000000..4a8017f
--- /dev/null
+++ b/oauthlib/oauth2/rfc6749/grant_types/base.py
@@ -0,0 +1,40 @@
+# -*- coding: utf-8 -*-
+"""
+oauthlib.oauth2.rfc6749.grant_types
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+"""
+from __future__ import unicode_literals, absolute_import
+
+import logging
+
+from oauthlib.oauth2.rfc6749 import errors, utils
+
+log = logging.getLogger(__name__)
+
+
+class GrantTypeBase(object):
+    error_uri = None
+    request_validator = None
+
+    def create_authorization_response(self, request, token_handler):
+        raise NotImplementedError('Subclasses must implement this method.')
+
+    def create_token_response(self, request, token_handler):
+        raise NotImplementedError('Subclasses must implement this method.')
+
+    def validate_grant_type(self, request):
+        if not self.request_validator.validate_grant_type(request.client_id,
+                                                          request.grant_type, request.client, request):
+            log.debug('Unauthorized from %r (%r) access to grant type %s.',
+                      request.client_id, request.client, request.grant_type)
+            raise errors.UnauthorizedClientError(request=request)
+
+    def validate_scopes(self, request):
+        if not request.scopes:
+            request.scopes = utils.scope_to_list(request.scope) or utils.scope_to_list(
+                self.request_validator.get_default_scopes(request.client_id, request))
+        log.debug('Validating access to scopes %r for client %r (%r).',
+                  request.scopes, request.client_id, request.client)
+        if not self.request_validator.validate_scopes(request.client_id,
+                                                      request.scopes, request.client, request):
+            raise errors.InvalidScopeError(request=request)