Use ASCII JSON responses for proxy compatibility

module/server/app.py

@@ -1,23 +1,38 @@
 # This Python file uses the following encoding: utf-8
 # @author runhey
 # github https://github.com/runhey
-from pathlib import Path
-
+import argparse
+import json
 from contextlib import asynccontextmanager
+from pathlib import Path
 
-import argparse
-from starlette import status
-from starlette.responses import JSONResponse
 from fastapi import FastAPI, Request
+from fastapi.encoders import jsonable_encoder
 from fastapi.middleware.cors import CORSMiddleware
+from fastapi.responses import JSONResponse
+from starlette import status
+from starlette.staticfiles import StaticFiles
 
 from module.logger import logger
 from module.server.home_router import home_app
 from module.server.script_router import script_app
 from module.server.tool_router import tool_app
 from module.server.setting import State
 from module.server.main_manager import mm
-from starlette.staticfiles import StaticFiles
+
+
+class ASCIIJSONResponse(JSONResponse):
+    """Serialize non-ASCII characters as ``\\uXXXX`` for proxy compatibility."""
+
+    def render(self, content) -> bytes:
+        encoded_content = jsonable_encoder(content)
+        return json.dumps(
+            encoded_content,
+            ensure_ascii=True,
+            allow_nan=False,
+            indent=None,
+            separators=(",", ":"),
+        ).encode("utf-8")
 
 
 @asynccontextmanager
@@ -31,6 +46,7 @@ async def lifespan(app: FastAPI):
     description='OAS web service',
     version='0.0.0',
     lifespan=lifespan,
+    default_response_class=ASCIIJSONResponse,
 )
 
 app.add_middleware(
@@ -70,7 +86,7 @@ async def global_exception_handler(request: Request, exc: Exception):
 
     message = ', '.join(str(arg) for arg in exc.args) if exc.args else str(exc)
 
-    return JSONResponse(
+    return ASCIIJSONResponse(
         status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
         content={
             'message': message