Fix remote browser JSON control-plane delivery

src/api/admin.py

@@ -1,6 +1,7 @@
 """Admin API routes"""
 import asyncio
 import json
+import httpx
 from fastapi import APIRouter, Depends, HTTPException, Header, Request
 from fastapi.responses import JSONResponse
 from pydantic import BaseModel
@@ -189,7 +190,6 @@ async def _sync_json_http_request(
     request_kwargs: Dict[str, Any] = {
         "headers": req_headers,
         "timeout": timeout,
-        "impersonate": "chrome120",
     }
 
     if payload is not None:
@@ -198,7 +198,9 @@ async def _sync_json_http_request(
             request_kwargs["json"] = payload
 
     try:
-        async with AsyncSession() as session:
+        # remote_browser 控制面是服务间 JSON API，使用 httpx 避免 curl_cffi 在当前
+        # Windows + impersonate 场景下 POST body 丢失导致 FastAPI 直接判定 body 缺失。
+        async with httpx.AsyncClient(follow_redirects=True) as session:
             response = await session.request(
                 method=request_method,
                 url=url,

src/services/flow_client.py

@@ -2,6 +2,7 @@
 import asyncio
 import json
 import contextvars
+import httpx
 import time
 import uuid
 import random
@@ -2040,7 +2041,6 @@ class FlowClient:
         request_kwargs: Dict[str, Any] = {
             "headers": req_headers,
             "timeout": timeout,
-            "impersonate": "chrome120",
         }
 
         if payload is not None:
@@ -2049,7 +2049,9 @@ class FlowClient:
                 request_kwargs["json"] = payload
 
         try:
-            async with AsyncSession() as session:
+            # remote_browser 控制面只需要稳定传输 JSON，不需要浏览器指纹伪装。
+            # 使用 httpx 可以避免 curl_cffi 在当前环境下 POST body 被吞掉。
+            async with httpx.AsyncClient(follow_redirects=True) as session:
                 response = await session.request(
                     method=request_method,
                     url=url,

tests/test_api_routes.py

@@ -85,7 +85,7 @@ def test_flexible_auth_accepts_x_goog_api_key(monkeypatch):
     ) == "secret"
 
 
-def test_admin_remote_browser_helper_uses_asyncsession(monkeypatch):
+def test_admin_remote_browser_helper_uses_httpx(monkeypatch):
     calls = []
 
     class FakeResponse:
@@ -95,7 +95,10 @@ def test_admin_remote_browser_helper_uses_asyncsession(monkeypatch):
         def json(self):
             return {"success": True, "token": "abc"}
 
-    class FakeSession:
+    class FakeAsyncClient:
+        def __init__(self, **kwargs):
+            calls.append({"client_kwargs": kwargs})
+
         async def __aenter__(self):
             return self
 
@@ -110,7 +113,7 @@ def test_admin_remote_browser_helper_uses_asyncsession(monkeypatch):
             })
             return FakeResponse()
 
-    monkeypatch.setattr(admin_module, "AsyncSession", FakeSession)
+    monkeypatch.setattr(admin_module.httpx, "AsyncClient", FakeAsyncClient)
 
     status_code, payload, response_text = asyncio.run(
         admin_module._sync_json_http_request(
@@ -126,6 +129,11 @@ def test_admin_remote_browser_helper_uses_asyncsession(monkeypatch):
     assert payload == {"success": True, "token": "abc"}
     assert response_text == '{"success": true, "token": "abc"}'
     assert calls == [
+        {
+            "client_kwargs": {
+                "follow_redirects": True,
+            },
+        },
         {
             "method": "POST",
             "url": "https://example.com/api/v1/custom-score",
@@ -136,7 +144,6 @@ def test_admin_remote_browser_helper_uses_asyncsession(monkeypatch):
                     "Content-Type": "application/json; charset=utf-8",
                 },
                 "timeout": 15,
-                "impersonate": "chrome120",
                 "json": {"website_url": "https://example.com"},
             },
         }

tests/test_flow_client_control_plane.py

@@ -49,7 +49,7 @@ def test_control_plane_calls_use_short_timeouts(monkeypatch):
     assert [call["timeout"] for call in calls] == [10, 15, 10, 10]
 
 
-def test_remote_browser_http_helper_uses_asyncsession(monkeypatch):
+def test_remote_browser_http_helper_uses_httpx(monkeypatch):
     calls = []
 
     class FakeResponse:
@@ -59,7 +59,10 @@ def test_remote_browser_http_helper_uses_asyncsession(monkeypatch):
         def json(self):
             return {"ok": True}
 
-    class FakeSession:
+    class FakeAsyncClient:
+        def __init__(self, **kwargs):
+            calls.append({"client_kwargs": kwargs})
+
         async def __aenter__(self):
             return self
 
@@ -74,7 +77,7 @@ def test_remote_browser_http_helper_uses_asyncsession(monkeypatch):
             })
             return FakeResponse()
 
-    monkeypatch.setattr(flow_client_module, "AsyncSession", FakeSession)
+    monkeypatch.setattr(flow_client_module.httpx, "AsyncClient", FakeAsyncClient)
 
     status_code, payload, response_text = asyncio.run(
         FlowClient._sync_json_http_request(
@@ -90,6 +93,11 @@ def test_remote_browser_http_helper_uses_asyncsession(monkeypatch):
     assert payload == {"ok": True}
     assert response_text == '{"ok": true}'
     assert calls == [
+        {
+            "client_kwargs": {
+                "follow_redirects": True,
+            },
+        },
         {
             "method": "POST",
             "url": "https://example.com/api/v1/solve",
@@ -100,7 +108,6 @@ def test_remote_browser_http_helper_uses_asyncsession(monkeypatch):
                     "Content-Type": "application/json; charset=utf-8",
                 },
                 "timeout": 12,
-                "impersonate": "chrome120",
                 "json": {"project_id": "project-123"},
             },
         }