# HG changeset patch
# User Matthew Wild <mwild1@gmail.com>
# Date 1602586528 -3600
# Node ID de76f566159e42e334d9fc2255eeb9a899df5945
# Parent  413bd21ba449993a6cfc797acb0d3fa60d3cf94d
net.http.server: Don't send Content-Length on 1xx/204 responses, per RFC (fixes #1596)

diff -r 413bd21ba449 -r de76f566159e net/http/server.lua
--- a/net/http/server.lua	Mon Oct 12 20:21:18 2020 +0200
+++ b/net/http/server.lua	Tue Oct 13 11:55:28 2020 +0100
@@ -295,7 +295,10 @@
 function _M.send_response(response, body)
 	if response.finished then return; end
 	body = body or response.body or "";
-	response.headers.content_length = #body;
+	-- Per RFC 7230, informational (1xx) and 204 (no content) should have no c-l header
+	if response.status_code > 199 and response.status_code ~= 204 then
+		response.headers.content_length = #body;
+	end
 	local output = prepare_header(response);
 	t_insert(output, body);
 	response.conn:write(t_concat(output));