feat: Distinguish between streaming and non streaming internally (#121)

* feat: Distinguish between streaming and non streaming internally

* clean up

openai_forward/forward/core.py

@@ -495,6 +495,7 @@ async def aiter_bytes(
         route_path: str,
         uid: str,
         cache_key: str | None = None,
+        stream: bool | None = None,
     ):
         """
         Asynchronously iterates through the bytes in the given aiohttp.ClientResponse object
@@ -506,38 +507,54 @@ async def aiter_bytes(
             route_path (str): The API route path.
             uid (str): Unique identifier for the request.
             cache_key (bytes): The cache key.
+            stream (bool): Whether the response is a stream.
 
         Returns:
              AsyncGenerator[bytes]: Each chunk of bytes from the server's response.
         """
 
-        queue_is_complete = False
-
-        queue = Queue()
-        # todo:
-        task = asyncio.create_task(self.read_chunks(r, queue))
+        yield_completed = False
         chunk_list = []
-        try:
-            while True:
-                chunk = await queue.get()
-                if not isinstance(chunk, bytes):
-                    queue.task_done()
-                    queue_is_complete = True
-                    break
-                if CACHE_OPENAI:
-                    chunk_list.append(chunk)
+        chunk = None
+        if stream:
+            queue = Queue()
+            # todo:
+            task = asyncio.create_task(self.read_chunks(r, queue))
+            try:
+                while True:
+                    chunk = await queue.get()
+                    if not isinstance(chunk, bytes):
+                        queue.task_done()
+                        yield_completed = True
+                        break
+                    if CACHE_OPENAI:
+                        chunk_list.append(chunk)
+                    yield chunk
+            except Exception as e:
+                logger.warning(
+                    f"aiter_bytes error:{e}\nhost:{request.client.host} method:{request.method}: "
+                    f"{traceback.format_exc()}"
+                )
+            finally:
+                if not task.done():
+                    task.cancel()
+        else:
+            try:
+                chunk = await r.read()
                 yield chunk
-        except Exception:
-            logger.warning(
-                f"aiter_bytes error:\nhost:{request.client.host} method:{request.method}: {traceback.format_exc()}"
-            )
-        finally:
-            if not task.done():
-                task.cancel()
-            r.release()
+                chunk_list.append(chunk)
+                chunk = bytearray(chunk)
+                yield_completed = True
+            except Exception as e:
+                logger.warning(
+                    f"aiter_bytes error:{e}\nhost:{request.client.host} method:{request.method}: "
+                    f"{traceback.format_exc()}"
+                )
+
+        r.release()
 
         if uid:
-            if r.ok and queue_is_complete:
+            if r.ok and yield_completed:
                 target_info = self._handle_result(
                     chunk, uid, route_path, request.method
                 )
@@ -595,6 +612,7 @@ async def reverse_proxy(self, request: Request):
             request, route_path, model_set
         )
         uid = payload_info["uid"]
+        stream = payload_info.get('stream', None)
 
         cached_response, cache_key = get_cached_response(
             payload,
@@ -610,7 +628,7 @@ async def reverse_proxy(self, request: Request):
 
         r = await self.send(client_config, data=payload)
         return StreamingResponse(
-            self.aiter_bytes(r, request, route_path, uid, cache_key),
+            self.aiter_bytes(r, request, route_path, uid, cache_key, stream),
             status_code=r.status,
             media_type=r.headers.get("content-type"),
         )