🐛 Bug: 1. Fix the bug of httpx reading streamed output timeout.

2. Increase read response timeout.

main.py

@@ -20,7 +20,7 @@
 @asynccontextmanager
 async def lifespan(app: FastAPI):
     # 启动时的代码
-    timeout = httpx.Timeout(connect=15.0, read=10.0, write=30.0, pool=30.0)
+    timeout = httpx.Timeout(connect=15.0, read=20.0, write=30.0, pool=30.0)
     app.state.client = httpx.AsyncClient(timeout=timeout)
     app.state.config, app.state.api_keys_db, app.state.api_list = await load_config(app)
     yield
@@ -74,7 +74,7 @@ async def process_request(request: RequestModel, provider: Dict):
     if request.stream:
         model = provider['model'][request.model]
         generator = fetch_response_stream(app.state.client, url, headers, payload, engine, model)
-        wrapped_generator = await error_handling_wrapper(generator, status_code=500)
+        wrapped_generator = error_handling_wrapper(generator, status_code=500)
         return StreamingResponse(wrapped_generator, media_type="text/event-stream")
     else:
         return await fetch_response(app.state.client, url, headers, payload)

utils.py

@@ -73,11 +73,16 @@ def ensure_string(item):
     else:
         return str(item)
 
-async def async_generator(items):
-    for item in items:
-        yield item
-
 async def error_handling_wrapper(generator, status_code=200):
+    async def new_generator():
+        try:
+            yield ensure_string(first_item)
+            async for item in generator:
+                yield ensure_string(item)
+        except Exception as e:
+            logger.exception(f"Error in new_generator: {e}")
+            raise HTTPException(status_code=status_code, detail=f"Stream error: {str(e)}")
+
     try:
         first_item = await generator.__anext__()
         first_item_str = first_item
@@ -97,19 +102,60 @@ async def error_handling_wrapper(generator, status_code=200):
                 logger.error("error_handling_wrapper JSONDecodeError!" + repr(first_item_str))
                 raise StopAsyncIteration
         if isinstance(first_item_str, dict) and 'error' in first_item_str:
-            # 如果第一个 yield 的项是错误信息，抛出 HTTPException
             raise HTTPException(status_code=status_code, detail=f"{first_item_str}"[:300])
 
-        # 如果不是错误，创建一个新的生成器，首先yield第一个项，然后yield剩余的项
-        async def new_generator():
-            yield ensure_string(first_item)
-            async for item in generator:
-                yield ensure_string(item)
-
-        return new_generator()
+        # 创建新的生成器并包装在 try-except 块中
+        wrapped_generator = new_generator()
+        try:
+            async for item in wrapped_generator:
+                yield item
+        except HTTPException as http_exc:
+            raise http_exc
+        except Exception as e:
+            logger.exception(f"Unexpected error in error_handling_wrapper: {e}")
+            raise HTTPException(status_code=status_code, detail=f"Unexpected error: {str(e)}")
 
     except StopAsyncIteration:
         raise HTTPException(status_code=status_code, detail="data: {'error': 'No data returned'}")
+    except HTTPException as http_exc:
+        raise http_exc
+    except Exception as e:
+        logger.exception(f"Error in error_handling_wrapper: {e}")
+        raise HTTPException(status_code=status_code, detail=f"Wrapper error: {str(e)}")
+
+# async def error_handling_wrapper(generator, status_code=200):
+#     try:
+#         first_item = await generator.__anext__()
+#         first_item_str = first_item
+#         if isinstance(first_item_str, (bytes, bytearray)):
+#             first_item_str = first_item_str.decode("utf-8")
+#         if isinstance(first_item_str, str):
+#             if first_item_str.startswith("data: "):
+#                 first_item_str = first_item_str[6:]
+#             elif first_item_str.startswith("data:"):
+#                 first_item_str = first_item_str[5:]
+#             if first_item_str.startswith("[DONE]"):
+#                 logger.error("error_handling_wrapper [DONE]!")
+#                 raise StopAsyncIteration
+#             try:
+#                 first_item_str = json.loads(first_item_str)
+#             except json.JSONDecodeError:
+#                 logger.error("error_handling_wrapper JSONDecodeError!" + repr(first_item_str))
+#                 raise StopAsyncIteration
+#         if isinstance(first_item_str, dict) and 'error' in first_item_str:
+#             # 如果第一个 yield 的项是错误信息，抛出 HTTPException
+#             raise HTTPException(status_code=status_code, detail=f"{first_item_str}"[:300])
+
+#         # 如果不是错误，创建一个新的生成器，首先yield第一个项，然后yield剩余的项
+#         async def new_generator():
+#             yield ensure_string(first_item)
+#             async for item in generator:
+#                 yield ensure_string(item)
+
+#         return new_generator()
+
+#     except StopAsyncIteration:
+#         raise HTTPException(status_code=status_code, detail="data: {'error': 'No data returned'}")
 
 def post_all_models(token, config, api_list):
     all_models = []