Software / code / prosody
Diff
net/server_select.lua @ 11741:dcf38ac6a38c
net.server: Add a predrain callaback just before writes
Allows sneaking in things in the write buffer just before it's sent to
the network stack. For example ack requests, compression flushes or
other things that make sense to send after stanzas or other things.
This ensures any additional trailing data sent is included in the same
write, and possibly the same TCP packet. Other methods used such as
timers or nextTick might not have the same effect as it depends on
scheduling.
| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Mon, 16 Aug 2021 12:34:52 +0200 |
| parent | 11068:988ddd57e851 |
| child | 12480:7e9ebdc75ce4 |
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--- a/net/server_select.lua Mon Aug 16 11:37:51 2021 +0200 +++ b/net/server_select.lua Mon Aug 16 12:34:52 2021 +0200 @@ -294,6 +294,7 @@ local dispatch = listeners.onincoming local status = listeners.onstatus local disconnect = listeners.ondisconnect + local predrain = listeners.onpredrain local drain = listeners.ondrain local onreadtimeout = listeners.onreadtimeout; local detach = listeners.ondetach @@ -338,6 +339,7 @@ dispatch = listeners.onincoming disconnect = listeners.ondisconnect status = listeners.onstatus + predrain = listeners.onpredrain drain = listeners.ondrain handler.onreadtimeout = listeners.onreadtimeout detach = listeners.ondetach @@ -552,6 +554,9 @@ listeners.onconnect(handler); end end + if predrain then + predrain(handler); + end buffer = table_concat( bufferqueue, "", 1, bufferqueuelen ) succ, err, byte = send( socket, buffer, 1, bufferlen ) count = ( succ or byte or 0 ) * STAT_UNIT
