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mod_http_altconnect/mod_http_altconnect.lua @ 1903:758a9a723597
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author | Kim Alvefur <zash@zash.se> |
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date | Sun, 11 Oct 2015 17:50:38 +0200 |
parent | 1325:b21236b6b8d8 |
child | 3712:0a0bf87ccda6 |
rev | line source |
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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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22 |
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23 |
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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 }); |