U improve websocket security

spug_api/consumer/middleware.py

@@ -0,0 +1,42 @@
+# Copyright: (c) OpenSpug Organization. https://github.com/openspug/spug
+# Copyright: (c) <spug.dev@gmail.com>
+# Released under the AGPL-3.0 License.
+from channels.security.websocket import WebsocketDenier
+from apps.account.models import User
+from libs.utils import get_request_real_ip
+from urllib.parse import parse_qs
+import time
+
+
+class AuthMiddleware:
+    def __init__(self, application):
+        self.application = application
+
+    def __call__(self, scope):
+        # Make sure the scope is of type websocket
+        if scope["type"] != "websocket":
+            raise ValueError(
+                "You cannot use AuthMiddleware on a non-WebSocket connection"
+            )
+        headers = dict(scope.get('headers', []))
+        if self.verify_user(scope, headers):
+            return self.application(scope)
+        else:
+            return WebsocketDenier(scope)
+
+    def get_real_ip(self, headers):
+        decode_headers = {
+            'x-forwarded-for': headers.get(b'x-forwarded-for', b'').decode(),
+            'x-real-ip': headers.get(b'x-real-ip', b'').decode()
+        }
+        return get_request_real_ip(decode_headers)
+
+    def verify_user(self, scope, headers):
+        query_string = scope['query_string'].decode()
+        x_real_ip = self.get_real_ip(headers)
+        token = parse_qs(query_string).get('x-token', [''])[0]
+        if token and len(token) == 32:
+            user = User.objects.filter(access_token=token).first()
+            if user and x_real_ip == user.last_ip and user.token_expired >= time.time() and user.is_active:
+                scope['user'] = user
+                return True