prosody-modules
5d8f9cc5c6fb
mod_ogp/mod_ogp.lua

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mod_ogp/mod_ogp.lua @ 4468:5d8f9cc5c6fb

mod_migrate_http_upload: Upload data converter to mod_http_file_share
author Kim Alvefur <zash@zash.se>
date Wed, 24 Feb 2021 16:55:46 +0100
parent 4459:dbfda7f5522d
child 4482:21698b960bd6
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1 local mod_muc = module:depends("muc")
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2 local http = require "net.http"
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3 local st = require "util.stanza"
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4 local url_pattern = [[https?://%S+]]
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5 local xmlns_fasten = "urn:xmpp:fasten:0";
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6 local xmlns_xhtml = "http://www.w3.org/1999/xhtml";
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7
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8 local function ogp_handler(event)
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9 local room, stanza = event.room, st.clone(event.stanza)
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10 local body = stanza:get_child_text("body")
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11 if not body then return; end
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12
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13 local url = body:match(url_pattern)
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14 if not url then return; end
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15
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16 local origin_id = stanza:find("{urn:xmpp:sid:0}origin-id@id")
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17 if not origin_id then return; end
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18
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19 http.request(
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20 url,
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21 nil,
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22 function(response_body, response_code, _)
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23 if response_code ~= 200 then
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24 return
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25 end
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26
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27 local to = room.jid
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28 local from = room and room.jid or module.host
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29 local fastening = st.message({to = to, from = from, type = 'groupchat'}):tag("apply-to", {xmlns = xmlns_fasten, id = origin_id})
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30 local found_metadata = false
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31 local message_body = ""
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32
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33 local meta_pattern = [[<meta (.-)/?>]]
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34 for match in response_body:gmatch(meta_pattern) do
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35 local property = match:match([[property=%s*["']?(og:.-)["']?%s]])
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36 if not property then
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37 property = match:match([[property=["']?(og:.-)["']$]])
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38 end
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39
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40 local content = match:match([[content=%s*["'](.-)["']%s]])
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41 if not content then
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42 content = match:match([[content=["']?(.-)["']$]])
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43 end
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44 if not content then
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45 content = match:match([[content=(.-) property]])
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46 end
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47 if not content then
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48 content = match:match([[content=(.-)$]])
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49 end
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50
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51 if property and content then
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52 module:log("info", property .. "\t" .. content)
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53 fastening:tag(
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54 "meta",
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55 {
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56 xmlns = xmlns_xhtml,
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57 property = property,
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58 content = content
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59 }
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60 ):up()
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61 found_metadata = true
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62 message_body = message_body .. property .. "\t" .. content .. "\n"
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63 end
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64 end
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65
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66 if found_metadata then
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67 mod_muc.get_room_from_jid(room.jid):broadcast_message(fastening)
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68 end
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69 module:log("info", tostring(fastening))
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70 end
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71 )
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72 end
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73
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74 module:hook("muc-occupant-groupchat", ogp_handler)
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75
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76
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77 module:hook("muc-message-is-historic", function (event)
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78 local fastening = event.stanza:get_child('apply-to', xmlns_fasten)
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79 if fastening and fastening:get_child('meta', xmlns_xhtml) then
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80 return true
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81 end
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82 end);