修复jmidjourney流式数据没有实时推送的问题

apps/jmidjourney/api.py

@@ -42,5 +42,9 @@ async def ve_generate_image(data: dict, request: Request):
     return StreamingResponse(
         generate(),
         media_type="application/x-ndjson",
-        headers={"X-Content-Type-Options": "nosniff"}
+        headers={
+            "Cache-Control": "no-cache",
+            "X-Accel-Buffering": "no",
+            "X-Content-Type-Options": "nosniff"
+        }
     )

apps/jmidjourney/service.py

@@ -335,6 +335,7 @@ class MidjourneyService:
                 "status": "error",
                 "message": "未配置 VectorEngine Token"
             }
+            await asyncio.sleep(0)  # 让出控制权，确保数据立即推送
             return
 
         # 1. 提交任务
@@ -353,6 +354,7 @@ class MidjourneyService:
                 "status": "error",
                 "message": submit_result.get("message", "提交任务失败，未获取到任务ID")
             }
+            await asyncio.sleep(0)  # 让出控制权，确保数据立即推送
             return
         
         logger.info(f"VectorEngine 任务已提交，任务ID: {task_id}")
@@ -360,6 +362,7 @@ class MidjourneyService:
             "status": "submitted",
             "task_id": task_id
         }
+        await asyncio.sleep(0)  # 让出控制权，确保数据立即推送
 
         # 2. 轮询任务状态
         polling_count = 0
@@ -395,6 +398,7 @@ class MidjourneyService:
                     "progress": progress_val,
                     "task_id": task_id
                 }
+                await asyncio.sleep(0)  # 让出控制权，确保数据立即推送
             
             # 检查任务完成状态
             if status == "SUCCESS":
@@ -420,6 +424,7 @@ class MidjourneyService:
                         logger.error(f"分割图像失败: {str(e)}")
                 
                 yield response
+                await asyncio.sleep(0)  # 让出控制权，确保数据立即推送
                 return
             
             elif status in ("FAILURE", "FAILED"):
@@ -429,6 +434,7 @@ class MidjourneyService:
                     "message": fail_reason,
                     "task_id": task_id
                 }
+                await asyncio.sleep(0)  # 让出控制权，确保数据立即推送
                 return
             
             elif status == "CANCELLED":
@@ -437,6 +443,7 @@ class MidjourneyService:
                     "message": "任务已取消",
                     "task_id": task_id
                 }
+                await asyncio.sleep(0)  # 让出控制权，确保数据立即推送
                 return
             
             # 其他状态（如 IN_PROGRESS, SUBMITTED）继续轮询
@@ -448,3 +455,4 @@ class MidjourneyService:
             "message": f"任务超时，已轮询 {settings.vectorengine_max_polling_attempts} 次",
             "task_id": task_id
         }
+        await asyncio.sleep(0)  # 让出控制权，确保数据立即推送