Mercurial > prosody-modules
view mod_auto156/mod_auto156.lua @ 4813:0a257d1402c3
mod_muc_rtbl: Optimize case with zero hashes
On the assumption that during quiet times between torrents of spam,
the hash set would be empty. There would be no point in doing the
operations and hashes to check for a match in that case.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Mon, 06 Dec 2021 18:19:19 +0100 |
parents | 5d494dba9c02 |
children |
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-- Synthesize XEP-0156 JSON from DNS local array = require "util.array"; local encodings = require "util.encodings"; local json = require "util.json"; local promise = require "util.promise"; local dns = require"net.adns".resolver(); local function check_dns(domain) return dns:lookup_promise("_xmppconnect." .. domain, "TXT"); end local function check_domain(domain) return promise.resolve(domain):next(encodings.stringprep.nameprep):next(encodings.idna.to_ascii):next( function(domain_A) if not domain_A then return promise.reject(400); else return domain_A; end end):next(check_dns):next(function(txt) local uris = array(); for _, cm in ipairs(txt) do local kind, uri = tostring(cm.txt):match("^_xmpp%-client%-(%w+)=([hpstw]+s?://.*)"); if kind then uris:push({rel = "urn:xmpp:alt-connections:" .. kind, href = uri}); end end if #uris == 0 then return promise.reject(404); end return {links=uris}; end); end module:depends("http"); module:provides("http", { route = { ["GET /*"] = function(_, domain) return check_domain(domain):next(function(altmethods) return {headers = {content_type = "application/json"}, body = json.encode(altmethods)}; end); end, }, }); function module.command(args) local async = require "util.async"; for _, domain in ipairs(args) do print(assert(async.wait_for(check_domain(domain):next(json.encode)))); end end