prosody-modules
44f6537f6427
mod_presence_dedup/mod_presence_dedup.lua

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mod_presence_dedup/mod_presence_dedup.lua @ 4409:44f6537f6427

mod_invites_adhoc: Fail contact invite if user is not on current host Only the username was being used, and the host of the requester ignored. Luckily this only affects admins of the host. If they want to create an account they can use the other command. If they want to create a contact they should request from their account on this host.
author Matthew Wild <mwild1@gmail.com>
date Thu, 28 Jan 2021 07:04:11 +0000
parent 3445:19924a2c4a48
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2155
f24b02e0d706 mod_presence_dedup: Attempt at saving bandwith by deduplicating presence stanzas
Kim Alvefur <zash@zash.se>
parents:
diff changeset
1 local st = require "util.stanza";
f24b02e0d706 mod_presence_dedup: Attempt at saving bandwith by deduplicating presence stanzas
Kim Alvefur <zash@zash.se>
parents:
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2 local cache = require "util.cache";
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Kim Alvefur <zash@zash.se>
parents:
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3 local add_filter = require "util.filters".add_filter;
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4
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Kim Alvefur <zash@zash.se>
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5 local cache_size = module:get_option_number("presence_dedup_cache_size", 100);
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6
f24b02e0d706 mod_presence_dedup: Attempt at saving bandwith by deduplicating presence stanzas
Kim Alvefur <zash@zash.se>
parents:
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7 -- stanza equality tests
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Kim Alvefur <zash@zash.se>
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8 local function attr_eq(a, b)
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Kim Alvefur <zash@zash.se>
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9 if a == b then return true; end -- unlikely but not impossible
f24b02e0d706 mod_presence_dedup: Attempt at saving bandwith by deduplicating presence stanzas
Kim Alvefur <zash@zash.se>
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10 for k,v in pairs(a) do if b[k] ~= v then return false; end end
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Kim Alvefur <zash@zash.se>
parents:
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11 for k,v in pairs(b) do if a[k] ~= v then return false; end end
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Kim Alvefur <zash@zash.se>
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12 return true;
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Kim Alvefur <zash@zash.se>
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13 end
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Kim Alvefur <zash@zash.se>
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14
f24b02e0d706 mod_presence_dedup: Attempt at saving bandwith by deduplicating presence stanzas
Kim Alvefur <zash@zash.se>
parents:
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15 local function st_eq(a, b)
f24b02e0d706 mod_presence_dedup: Attempt at saving bandwith by deduplicating presence stanzas
Kim Alvefur <zash@zash.se>
parents:
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16 if a == b then return true; end
f24b02e0d706 mod_presence_dedup: Attempt at saving bandwith by deduplicating presence stanzas
Kim Alvefur <zash@zash.se>
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17 if type(b) ~= "table" then return false; end
f24b02e0d706 mod_presence_dedup: Attempt at saving bandwith by deduplicating presence stanzas
Kim Alvefur <zash@zash.se>
parents:
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18 if getmetatable(b) ~= st.stanza_mt then return false; end
f24b02e0d706 mod_presence_dedup: Attempt at saving bandwith by deduplicating presence stanzas
Kim Alvefur <zash@zash.se>
parents:
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19 if a.name ~= b.name then return false; end
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Kim Alvefur <zash@zash.se>
parents:
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20 if #a ~= #b then return false; end
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Kim Alvefur <zash@zash.se>
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21 if not attr_eq(a.attr, b.attr) then return false; end
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Kim Alvefur <zash@zash.se>
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22 for i = 1, #a do if not st_eq(a[i], b[i]) then return false; end end
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Kim Alvefur <zash@zash.se>
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23 return true;
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24 end
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25
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Kim Alvefur <zash@zash.se>
parents:
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26 local function dedup_presence(stanza, session)
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Kim Alvefur <zash@zash.se>
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27 if session.presence_cache and session.presence
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Kim Alvefur <zash@zash.se>
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28 and getmetatable(stanza) == st.stanza_mt and stanza.name == "presence"
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Kim Alvefur <zash@zash.se>
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29 and stanza.attr.xmlns == nil and stanza.attr.from then
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Kim Alvefur <zash@zash.se>
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30 local cached = session.presence_cache:get(stanza.attr.from);
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31 if st_eq(stanza, cached) then
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32 return nil;
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Kim Alvefur <zash@zash.se>
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33 else
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Kim Alvefur <zash@zash.se>
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34 session.presence_cache:set(stanza.attr.from, st.clone(stanza));
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35 end
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Kim Alvefur <zash@zash.se>
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36 end
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Kim Alvefur <zash@zash.se>
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37 return stanza;
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Kim Alvefur <zash@zash.se>
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38 end
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Kim Alvefur <zash@zash.se>
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39
f24b02e0d706 mod_presence_dedup: Attempt at saving bandwith by deduplicating presence stanzas
Kim Alvefur <zash@zash.se>
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40 module:hook("presence/initial", function (event)
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19924a2c4a48 mod_presence_dedup: Remove unused variables [luacheck]
Kim Alvefur <zash@zash.se>
parents: 2155
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41 local session = event.origin;
2155
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Kim Alvefur <zash@zash.se>
parents:
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42 session.presence_cache = cache.new(cache_size);
f24b02e0d706 mod_presence_dedup: Attempt at saving bandwith by deduplicating presence stanzas
Kim Alvefur <zash@zash.se>
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43 add_filter(session, "stanzas/out", dedup_presence, 90);
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Kim Alvefur <zash@zash.se>
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44 end);