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annotate mod_ogp/mod_ogp.lua @ 4294:ae8191d9d533

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mod_sentry: Include sentry.lib in luarock
author Kim Alvefur <zash@zash.se>
date Thu, 10 Dec 2020 13:36:52 +0100
parents 38da10e4b593
children dbfda7f5522d
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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
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5 local ogp_pattern = [[<meta property=["']?(og:.-)["']? content=%s*["']?(.-)["']?%s-/?>]]
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6 local ogp_pattern2 = [[<meta content=%s*["']?(.-)["']? property=["']?(og:.-)["']?%s-/?>]]
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7 local url_pattern = [[https?://%S+]]
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8
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9 local function ogp_handler(event)
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10 local room, stanza = event.room, st.clone(event.stanza)
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11 local body = stanza:get_child_text("body")
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12 if not body then return; end
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13
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14 local url = body:match(url_pattern)
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15 if not url then return; end
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16
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17 local origin_id = stanza:find("{urn:xmpp:sid:0}origin-id@id")
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18 if not origin_id then return; end
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19
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20 http.request(
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21 url,
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22 nil,
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23 function(response_body, response_code, _)
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24 if response_code ~= 200 then
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25 return
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26 end
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27
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28 local to = room.jid
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29 local from = room and room.jid or module.host
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30 local fastening = st.message({to = to, from = from}):tag("apply-to", {xmlns = "urn:xmpp:fasten:0", id = origin_id})
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31 local found_metadata = false
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32 local message_body = ""
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33
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34 local meta_pattern = [[<meta (.-)/?>]]
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35 for match in response_body:gmatch(meta_pattern) do
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36 local property = match:match([[property=%s*["']?(og:.-)["']?%s]])
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37 if not property then
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38 property = match:match([[property=["']?(og:.-)["']$]])
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39 end
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40
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41 local content = match:match([[content=%s*["'](.-)["']%s]])
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42 if not content then
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43 content = match:match([[content=["']?(.-)["']$]])
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44 end
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45 if not content then
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46 content = match:match([[content=(.-) property]])
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47 end
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48 if not content then
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49 content = match:match([[content=(.-)$]])
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50 end
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51
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52 if property and content then
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53 module:log("info", property .. "\t" .. content)
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54 fastening:tag(
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55 "meta",
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56 {
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57 xmlns = "http://www.w3.org/1999/xhtml",
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58 property = property,
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59 content = content
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60 }
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61 ):up()
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62 found_metadata = true
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63 message_body = message_body .. property .. "\t" .. content .. "\n"
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64 end
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65 end
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66
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67
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68 if found_metadata then
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69 mod_muc.get_room_from_jid(room.jid):broadcast_message(fastening)
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70 end
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71 module:log("info", tostring(fastening))
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72 end
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73 )
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74 end
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75
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76 module:hook("muc-occupant-groupchat", ogp_handler)