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annotate mod_http_altconnect/mod_http_altconnect.lua @ 3492:f59334da6df9

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mod_conversejs: Show fallback text if converse.js fails to load (thanks MattJ) This can happen if javascript is enabled but 3rd party resources are blocked, or some other error happened.
author Kim Alvefur <zash@zash.se>
date Tue, 19 Mar 2019 19:43:13 +0100
parents b21236b6b8d8
children 0a0bf87ccda6
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c0957b904487 mod_http_altconnect: Refactor to have module/connection method lookup in a common place
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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 json = require"util.json";
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7 local st = require"util.stanza";
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8 local array = require"util.array";
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9
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10 local host_modules = hosts[module.host].modules;
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11
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12 local function get_supported()
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13 local uris = array();
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14 if host_modules["bosh"] then
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15 uris:push({ rel = "urn:xmpp:alt-connections:xbosh", href = module:http_url("bosh", "/http-bind") });
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16 end
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17 if host_modules["websocket"] then
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18 uris:push({ rel = "urn:xmpp:alt-connections:websocket", href = module:http_url("websocket", "xmpp-websocket"):gsub("^http", "ws") });
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19 end
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20 return uris;
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21 end
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24 local function GET_xml(event)
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25 local request, response = event.request, event.response;
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26 local xrd = st.stanza("XRD", { xmlns='http://docs.oasis-open.org/ns/xri/xrd-1.0' });
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27 local uris = get_supported();
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28 for i, method in ipairs(uris) do
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29 xrd:tag("Link", method):up();
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30 end
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31 response.headers.content_type = "application/xrd+xml"
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32 response.headers.access_control_allow_origin = "*";
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33 return '<?xml version="1.0" encoding="UTF-8"?>' .. tostring(xrd);
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34 end
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35
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36 local function GET_json(event)
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37 local request, response = event.request, event.response;
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38 local jrd = { links = get_supported() };
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39 response.headers.content_type = "application/json"
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40 response.headers.access_control_allow_origin = "*";
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41 return json.encode(jrd);
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42 end;
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43
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44 local function GET_either(event)
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45 local accept_type = event.request.headers.accept or "";
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46 if ( accept_type:find("xml") or #accept_type ) < ( accept_type:find("json") or #accept_type+1 ) then
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47 return GET_xml(event);
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48 else
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49 return GET_json(event);
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50 end
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51 end;
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52
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53 module:provides("http", {
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54 default_path = "/.well-known";
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55 route = {
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56 ["GET /host-meta"] = GET_either;
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57 -- ["GET /host-meta.xml"] = GET_xml; -- Hmmm
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58 ["GET /host-meta.json"] = GET_json;
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59 };
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60 });