From f572e1593851cc02e2c7fae70fd036bc311dfb4f Mon Sep 17 00:00:00 2001
From: qicosmos <qicosmos@163.com>
Date: Tue, 26 Sep 2023 15:11:42 +0800
Subject: [PATCH] fix

---
 include/cinatra/coro_http_client.hpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/include/cinatra/coro_http_client.hpp b/include/cinatra/coro_http_client.hpp
index a3e67fb4..cd643d0d 100644
--- a/include/cinatra/coro_http_client.hpp
+++ b/include/cinatra/coro_http_client.hpp
@@ -763,7 +763,12 @@ class coro_http_client {
       }
     }
 
-    add_header("Transfer-Encoding", "chunked");
+    if (headers.empty()) {
+      add_header("Transfer-Encoding", "chunked");
+    }
+    else {
+      headers.emplace("Transfer-Encoding", "chunked");
+    }
 
     std::string header_str =
         build_request_header(u, method, ctx, true, std::move(headers));