annotate mod_http_altconnect/mod_http_altconnect.lua @ 4203:c4002aae4ad3

mod_s2s_keepalive: Use timestamp as iq @id RFC 6120 implies that the id attribute must be unique within a stream. This should fix problems with remote servers that enforce uniqueness and don't answer duplicated ids. If it doesn't do that, then at least you can get a guesstimate at round-trip time from the difference between the result iq stanza and the timestamp it was logged without having to go look for when it was sent, or needing to keep state.
author Kim Alvefur <zash@zash.se>
date Wed, 14 Oct 2020 18:02:10 +0200
parents 0a0bf87ccda6
children
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1 -- mod_http_altconnect
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2 -- XEP-0156: Discovering Alternative XMPP Connection Methods
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3
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4 module:depends"http";
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5
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6 local mm = require "core.modulemanager";
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7 local json = require"util.json";
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8 local st = require"util.stanza";
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9 local array = require"util.array";
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10
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11 local function get_supported()
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12 local uris = array();
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13 if mm.is_loaded(module.host, "bosh") or mm.is_loaded("*", "bosh") then
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14 uris:push({ rel = "urn:xmpp:alt-connections:xbosh", href = module:http_url("bosh", "/http-bind") });
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15 end
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16 if mm.is_loaded(module.host, "websocket") or mm.is_loaded("*", "websocket") then
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17 uris:push({ rel = "urn:xmpp:alt-connections:websocket", href = module:http_url("websocket", "xmpp-websocket"):gsub("^http", "ws") });
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18 end
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19 return uris;
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20 end
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23 local function GET_xml(event)
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24 local request, response = event.request, event.response;
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25 local xrd = st.stanza("XRD", { xmlns='http://docs.oasis-open.org/ns/xri/xrd-1.0' });
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26 local uris = get_supported();
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27 for i, method in ipairs(uris) do
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28 xrd:tag("Link", method):up();
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29 end
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30 response.headers.content_type = "application/xrd+xml"
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31 response.headers.access_control_allow_origin = "*";
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32 return '<?xml version="1.0" encoding="UTF-8"?>' .. tostring(xrd);
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33 end
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35 local function GET_json(event)
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36 local request, response = event.request, event.response;
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37 local jrd = { links = get_supported() };
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38 response.headers.content_type = "application/json"
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39 response.headers.access_control_allow_origin = "*";
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40 return json.encode(jrd);
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41 end;
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43 local function GET_either(event)
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44 local accept_type = event.request.headers.accept or "";
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45 if ( accept_type:find("xml") or #accept_type ) < ( accept_type:find("json") or #accept_type+1 ) then
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46 return GET_xml(event);
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47 else
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48 return GET_json(event);
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49 end
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50 end;
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52 module:provides("http", {
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53 default_path = "/.well-known";
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54 route = {
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55 ["GET /host-meta"] = GET_either;
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56 -- ["GET /host-meta.xml"] = GET_xml; -- Hmmm
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57 ["GET /host-meta.json"] = GET_json;
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58 };
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59 });