#88 缓存应答消息体构建过程中，连接中断，http session被强制回收，http业务层和http解析层两次对cached_response调用了释放（double free）。

目前业务层在tfe_http_session_response_set后，不再负责释放，解决方案比较dirty。

plugin/business/pangu-http/src/pangu_http.cpp

@@ -518,7 +518,7 @@ static void pangu_http_ctx_free(struct pangu_http_ctx * ctx)
 	}
 	if(ctx->cached_response)
 	{
-		tfe_http_half_free(ctx->cached_response);
+		//Dirty close
 		ctx->cached_response=NULL;
 	}
 	
@@ -1098,8 +1098,11 @@ static void cache_read_on_succ(future_result_t * result, void * user)
 			tfe_http_nonstd_field_write(ctx->cached_response, "X-Cache-Lookup", "Hit From TFE");
 			snprintf(temp, sizeof(temp), "%lu", meta->content_length);
 			tfe_http_std_field_write(ctx->cached_response, TFE_HTTP_CONT_LENGTH, temp);
-			
+
+			//Dirty code here.			
 			tfe_http_session_response_set(ctx->ref_session, ctx->cached_response);
+			//From now, ownership of cached_response has been transfered to http session, 
+			//bussines plugin only hold this pointer as an reference for writing response body.
 			tfe_http_half_write_body_begin(ctx->cached_response, 1);
 			
 			meta=NULL;