Mercurial > prosody-modules
view mod_presence_dedup/mod_presence_dedup.lua @ 5461:06640647d193
mod_http_oauth2: Fix use of arbitrary ports in loopback redirect URIs
Per draft-ietf-oauth-v2-1-08#section-8.4.2
> The authorization server MUST allow any port to be specified at the
> time of the request for loopback IP redirect URIs, to accommodate
> clients that obtain an available ephemeral port from the operating
> system at the time of the request.
Uncertain if it should normalize the host part, but it also seems
harmless to treat IPv6 and IPv4 the same here.
One thing is that "localhost" is NOT RECOMMENDED because it can
sometimes be pointed to non-loopback interfaces via DNS or hosts file.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Wed, 17 May 2023 13:51:30 +0200 |
parents | 19924a2c4a48 |
children |
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local st = require "util.stanza"; local cache = require "util.cache"; local add_filter = require "util.filters".add_filter; local cache_size = module:get_option_number("presence_dedup_cache_size", 100); -- stanza equality tests local function attr_eq(a, b) if a == b then return true; end -- unlikely but not impossible for k,v in pairs(a) do if b[k] ~= v then return false; end end for k,v in pairs(b) do if a[k] ~= v then return false; end end return true; end local function st_eq(a, b) if a == b then return true; end if type(b) ~= "table" then return false; end if getmetatable(b) ~= st.stanza_mt then return false; end if a.name ~= b.name then return false; end if #a ~= #b then return false; end if not attr_eq(a.attr, b.attr) then return false; end for i = 1, #a do if not st_eq(a[i], b[i]) then return false; end end return true; end local function dedup_presence(stanza, session) if session.presence_cache and session.presence and getmetatable(stanza) == st.stanza_mt and stanza.name == "presence" and stanza.attr.xmlns == nil and stanza.attr.from then local cached = session.presence_cache:get(stanza.attr.from); if st_eq(stanza, cached) then return nil; else session.presence_cache:set(stanza.attr.from, st.clone(stanza)); end end return stanza; end module:hook("presence/initial", function (event) local session = event.origin; session.presence_cache = cache.new(cache_size); add_filter(session, "stanzas/out", dedup_presence, 90); end);