From 6b9ffc7fadcdaeccd971230733607761863946f0 Mon Sep 17 00:00:00 2001
From: flywind <43030857+xflywind@users.noreply.github.com>
Date: Fri, 3 Apr 2020 15:05:43 +0800
Subject: [PATCH] fix asynchttpserver content-length header (#13846)

---
 lib/pure/asynchttpserver.nim | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/lib/pure/asynchttpserver.nim b/lib/pure/asynchttpserver.nim
index c806d972ab..a9ea4780fb 100644
--- a/lib/pure/asynchttpserver.nim
+++ b/lib/pure/asynchttpserver.nim
@@ -99,9 +99,12 @@ proc respond*(req: Request, code: HttpCode, content: string,
 
   if headers != nil:
     msg.addHeaders(headers)
-  msg.add("Content-Length: ")
-  # this particular way saves allocations:
-  msg.add content.len
+    
+  if not headers.hasKey("Content-Length"):
+    msg.add("Content-Length: ")
+    # this particular way saves allocations:
+    msg.addInt content.len
+  
   msg.add "\c\L\c\L"
   msg.add(content)
   result = req.client.send(msg)