Software /
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prosody
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plugins/mod_s2s_bidi.lua @ 10973:39991e40d1dc
util.dbuffer: dynamic string buffer
Similar to util.ringbuffer (and shares almost identical API). Differences:
- size limit is optional and dynamic
- does not allocate a fixed buffer of max_size bytes
- focus on simply storing references to existing string objects where possible,
avoiding unnecessary allocations
- references are still stored in a ring buffer to enable use as a fast FIFO
Optional second parameter to new() provides the number of ring buffer segments. On
Lua 5.2 on my laptop, a segment is ~19 bytes. If the ring buffer fills up, the next
write will compact all strings into a single item.
author | Matthew Wild <mwild1@gmail.com> |
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date | Fri, 26 Jun 2020 16:41:31 +0100 |
parent | 10458:602dd1e2f399 |
child | 12330:38b5b05407be |
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-- Prosody IM -- Copyright (C) 2019 Kim Alvefur -- -- This project is MIT/X11 licensed. Please see the -- COPYING file in the source package for more information. -- local st = require "util.stanza"; local xmlns_bidi_feature = "urn:xmpp:features:bidi" local xmlns_bidi = "urn:xmpp:bidi"; local require_encryption = module:get_option_boolean("s2s_require_encryption", false); module:hook("s2s-stream-features", function(event) local origin, features = event.origin, event.features; if origin.type == "s2sin_unauthed" and (not require_encryption or origin.secure) then features:tag("bidi", { xmlns = xmlns_bidi_feature }):up(); end end); module:hook_tag("http://etherx.jabber.org/streams", "features", function (session, stanza) if session.type == "s2sout_unauthed" and (not require_encryption or session.secure) then local bidi = stanza:get_child("bidi", xmlns_bidi_feature); if bidi then session.incoming = true; session.log("debug", "Requesting bidirectional stream"); session.sends2s(st.stanza("bidi", { xmlns = xmlns_bidi })); end end end, 200); module:hook_tag("urn:xmpp:bidi", "bidi", function(session) if session.type == "s2sin_unauthed" and (not require_encryption or session.secure) then session.log("debug", "Requested bidirectional stream"); session.outgoing = true; return true; end end);