fix payement link and gallery image

apps/messaging/read_receipts.py

@@ -0,0 +1,29 @@
+"""Bounded parsing for explicit message-read acknowledgements."""
+import json
+import uuid
+
+from django.core.exceptions import ValidationError
+
+
+def message_read_ids(request):
+    if request.content_type == 'application/json':
+        try:
+            payload = json.loads(request.body or b'{}')
+        except (TypeError, ValueError):
+            raise ValidationError('invalid_json')
+        if not isinstance(payload, dict):
+            raise ValidationError('invalid_json')
+        values = payload.get('message_ids', [])
+    else:
+        values = request.POST.getlist('message_ids')
+    if not isinstance(values, list) or len(values) > 100:
+        raise ValidationError('invalid_message_ids')
+    identifiers = set()
+    for value in values:
+        if not isinstance(value, str) or len(value) > 45:
+            continue
+        try:
+            identifiers.add(uuid.UUID(value))
+        except ValueError:
+            continue
+    return identifiers