Handle Seerr CSRF on request creation

backend/app/clients/jellyseerr.py

@@ -1,10 +1,44 @@
 from typing import Any, Dict, Optional
-from urllib.parse import quote
+from urllib.parse import quote, unquote, urlsplit
 import httpx
 from .base import ApiClient
 
 
 class JellyseerrClient(ApiClient):
+    async def _send_request(
+        self,
+        client: httpx.AsyncClient,
+        method: str,
+        url: str,
+        *,
+        headers: Dict[str, str],
+        params: Optional[Dict[str, Any]],
+        payload: Optional[Dict[str, Any]],
+    ) -> httpx.Response:
+        request_headers = dict(headers)
+        if method.upper() in {"POST", "PUT", "PATCH", "DELETE"} and self.base_url:
+            # Seerr's optional CSRF protection also applies to API-key writes.
+            # Seed its secret/token cookie pair, then echo the readable token in
+            # the header Seerr's own web client uses.
+            csrf_response = await client.get(
+                f"{self.base_url}/api/v1/auth/me",
+                headers=self.headers(),
+            )
+            csrf_response.raise_for_status()
+            csrf_token = client.cookies.get("XSRF-TOKEN")
+            if csrf_token:
+                request_headers["XSRF-TOKEN"] = unquote(csrf_token)
+                parsed_base = urlsplit(self.base_url)
+                request_headers["Origin"] = f"{parsed_base.scheme}://{parsed_base.netloc}"
+        return await super()._send_request(
+            client,
+            method,
+            url,
+            headers=request_headers,
+            params=params,
+            payload=payload,
+        )
+
     async def get_status(self) -> Optional[Dict[str, Any]]:
         return await self.get("/api/v1/status")