# HG changeset patch
# User Kim Alvefur <zash@zash.se>
# Date 1637333101 -3600
# Node ID 28f5c8061dad513a7f5422f1e3e0097cdfc7b1b3
# Parent  89aef37fca54bb99894a2c85c680086bcbd724be
net.server_epoll: Fix streaming downloads (thanks Menel)

ff4e34c448a4 broke the way net.http.server streams downloads from disk
because it made writes from the ondrain callback no longer reset the
want-write flag, causing the download to halt.

Writes from the predrain handler still must not trigger anything but
additions to the buffer, since it is about to do all the socket writing
already.

diff -r 89aef37fca54 -r 28f5c8061dad net/server_epoll.lua
--- a/net/server_epoll.lua	Thu Nov 18 16:26:54 2021 +0100
+++ b/net/server_epoll.lua	Fri Nov 19 15:45:01 2021 +0100
@@ -513,9 +513,9 @@
 		else
 			self.writebuffer = nil;
 		end
+		self._writing = nil;
 		self:setwritetimeout(false);
 		self:ondrain(); -- Be aware of writes in ondrain
-		self._writing = nil;
 		return ok;
 	elseif partial then
 		self:debug("Sent %d out of %d buffered bytes", partial, #data);