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annotate mod_auto156/mod_auto156.lua @ 5608:1893ae742f66

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mod_http_oauth2: Show errors on device flow user code entry page If the user enters the code incorrectly, having to click back to try again is no fun. Instead, show the error and the code entry form again.
author Kim Alvefur <zash@zash.se>
date Wed, 19 Jul 2023 13:05:47 +0200
parents 5d494dba9c02
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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6478442d217f mod_auto156: Queries for XEP-0156 TXT records and prints in JSON format
Kim Alvefur <zash@zash.se>
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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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12
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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