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annotate mod_auto156/mod_auto156.lua @ 5245:e22cae58141d

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mod_http_oauth2: Organize HTTP routes with comments Starting to get hard to follow. Usually one would start tracing the steps at the HTTP authorize route. Vaguely sorted alphabetically by path and point in the flow. (/register comes before /authorize tho)
author Kim Alvefur <zash@zash.se>
date Sun, 12 Mar 2023 11:27:29 +0100
parents 5d494dba9c02
children
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6478442d217f mod_auto156: Queries for XEP-0156 TXT records and prints in JSON format
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1 -- Synthesize XEP-0156 JSON from DNS
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2 local array = require "util.array";
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3 local encodings = require "util.encodings";
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4 local json = require "util.json";
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5 local promise = require "util.promise";
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6
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7 local dns = require"net.adns".resolver();
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8
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9 local function check_dns(domain)
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10 return dns:lookup_promise("_xmppconnect." .. domain, "TXT");
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11 end
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13 local function check_domain(domain)
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14 return promise.resolve(domain):next(encodings.stringprep.nameprep):next(encodings.idna.to_ascii):next(
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15 function(domain_A)
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16 if not domain_A then
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17 return promise.reject(400);
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18 else
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19 return domain_A;
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20 end
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21 end):next(check_dns):next(function(txt)
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22 local uris = array();
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23 for _, cm in ipairs(txt) do
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24 local kind, uri = tostring(cm.txt):match("^_xmpp%-client%-(%w+)=([hpstw]+s?://.*)");
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25 if kind then
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26 uris:push({rel = "urn:xmpp:alt-connections:" .. kind, href = uri});
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27 end
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28 end
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29 if #uris == 0 then
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30 return promise.reject(404);
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31 end
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32 return {links=uris};
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33 end);
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34 end
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35
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36 module:depends("http");
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37 module:provides("http", {
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38 route = {
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39 ["GET /*"] = function(_, domain)
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40 return check_domain(domain):next(function(altmethods)
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41 return {headers = {content_type = "application/json"}, body = json.encode(altmethods)};
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42 end);
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43 end,
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44 },
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45 });
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46
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47 function module.command(args)
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48 local async = require "util.async";
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49 for _, domain in ipairs(args) do
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50 print(assert(async.wait_for(check_domain(domain):next(json.encode))));
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51 end
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52 end