diff --git a/src/Http/HttpSession.cpp b/src/Http/HttpSession.cpp
index 0d3c6760..6cb17115 100644
--- a/src/Http/HttpSession.cpp
+++ b/src/Http/HttpSession.cpp
@@ -594,20 +594,20 @@ void HttpSession::sendResponse(int code,
         return;
     }
 
-    if (!body->sendFile(getSock()->rawFD())) {
-        //支持sendfile优化
+    if (typeid(*this) == typeid(HttpSession) && !body->sendFile(getSock()->rawFD())) {
+        //http支持sendfile优化
         return;
     }
 
     GET_CONFIG(uint32_t, sendBufSize, Http::kSendBufSize);
-    if(body->remainSize() > sendBufSize){
+    if (body->remainSize() > sendBufSize) {
         //文件下载提升发送性能
         setSocketFlags();
     }
 
     //发送http body
-    AsyncSenderData::Ptr data = std::make_shared<AsyncSenderData>(shared_from_this(),body,bClose);
-    getSock()->setOnFlush([data](){
+    AsyncSenderData::Ptr data = std::make_shared<AsyncSenderData>(shared_from_this(), body, bClose);
+    getSock()->setOnFlush([data]() {
         return AsyncSender::onSocketFlushed(data);
     });
     AsyncSender::onSocketFlushed(data);