feat(api): support OAuth2.0 and OIDC authentication, it has been tested with casdoor

feat(api): support OAuth2.0 and OIDC authentication, it has been tested with casdoor

cmdb-api/api/lib/perm/authentication/oauth2/__init__.py

@@ -0,0 +1,26 @@
+# -*- coding:utf-8 -*-
+
+from flask import current_app
+
+from . import routing
+
+
+class OAuth2(object):
+    def __init__(self, app=None, url_prefix=None):
+        self._app = app
+        if app is not None:
+            self.init_app(app, url_prefix)
+
+    @staticmethod
+    def init_app(app, url_prefix=None):
+        # Configuration defaults
+        app.config.setdefault('OAUTH2_GRANT_TYPE', 'authorization_code')
+        app.config.setdefault('OAUTH2_RESPONSE_TYPE', 'code')
+        app.config.setdefault('OAUTH2_AFTER_LOGIN', '/')
+
+        # Register Blueprint
+        app.register_blueprint(routing.blueprint, url_prefix=url_prefix)
+
+    @property
+    def app(self):
+        return self._app or current_app