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annotate mod_tweet_data/mod_tweet_data.lua @ 4598:09f0911c735d

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mod_ogp: Add the ability to block OGP fetching for certain domains
author JC Brand <jc@opkode.com>
date Tue, 22 Jun 2021 12:25:36 +0200
parents c858c76d0845
children efdc3e4dc5df
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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 json = require "util.json"
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5 local url_pattern = [[https://twitter.com/%S+/status/%S+]]
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6 local xmlns_fasten = "urn:xmpp:fasten:0"
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7 local xmlns_xhtml = "http://www.w3.org/1999/xhtml"
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8 local twitter_apiv2_bearer_token = module:get_option_string("twitter_apiv2_bearer_token");
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9
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10 local function fetch_tweet_data(room, url, tweet_id, origin_id)
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11 if not url then return; end
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12 local options = {
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13 method = "GET";
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14 headers = { Authorization = "Bearer "..twitter_apiv2_bearer_token; };
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15 };
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16
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17 http.request(
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18 'https://api.twitter.com/2/tweets/'..tweet_id..'?expansions=author_id&tweet.fields=created_at,text&user.fields=id,name,username,profile_image_url',
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19 options,
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20 function(response_body, response_code, _)
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21 if response_code ~= 200 then
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22 module:log("debug", "Call to %s returned code %s and body %s", url, response_code, response_body)
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23 return;
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24 end
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25
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26 local response = json.decode(response_body);
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27 if not response then return; end
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28
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29 local tweet = response['data'];
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30 local author = response['includes']['users'][1];
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31
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32 local to = room.jid
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33 local from = room and room.jid or module.host
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34 local fastening = st.message({to = to, from = from, type = 'groupchat'}):tag("apply-to", {xmlns = xmlns_fasten, id = origin_id})
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35
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36 fastening:tag(
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37 "meta",
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38 {
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39 xmlns = xmlns_xhtml,
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40 property = 'og:article:author',
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41 content = author['username']
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42 }
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43 ):up()
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44
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45 fastening:tag(
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46 "meta",
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47 {
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48 xmlns = xmlns_xhtml,
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49 property = 'og:article:published_time',
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50 content = tweet['created_at']
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51 }
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52 ):up()
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53
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54 fastening:tag(
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55 "meta",
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56 {
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57 xmlns = xmlns_xhtml,
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58 property = 'og:description',
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59 content = tweet['text']
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60 }
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61 ):up()
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62
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63 fastening:tag(
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64 "meta",
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65 {
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66 xmlns = xmlns_xhtml,
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67 property = 'og:image',
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68 content = author['profile_image_url']
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69 }
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70 ):up()
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71
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72 fastening:tag(
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73 "meta",
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74 {
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75 xmlns = xmlns_xhtml,
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76 property = 'og:title',
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77 content = author['username']
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78 }
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79 ):up()
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80
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81 fastening:tag(
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82 "meta",
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83 {
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84 xmlns = xmlns_xhtml,
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85 property = 'og:type',
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86 content = 'tweet'
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87 }
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88 ):up()
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89 fastening:tag(
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90 "meta",
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91 {
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92 xmlns = xmlns_xhtml,
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93 property = 'og:url',
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94 content = 'https://twitter.com/'..author['username']..'/status/'..tweet['id']
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95 }
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96 ):up()
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97
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98 mod_muc.get_room_from_jid(room.jid):broadcast_message(fastening)
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99 module:log("debug", tostring(fastening))
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100 end
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101 )
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102 end
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103
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104 local function tweet_handler(event)
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105 local room, stanza = event.room, st.clone(event.stanza)
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106 local body = stanza:get_child_text("body")
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107
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108 if not body then return; end
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109
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110 local origin_id = stanza:find("{urn:xmpp:sid:0}origin-id@id")
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111 if not origin_id then return; end
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112
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113 for url in body:gmatch(url_pattern) do
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114 local _, _, _, tweet_id = string.find(url, "https://twitter.com/(%S+)/status/(%S+)");
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115 fetch_tweet_data(room, url, tweet_id, origin_id);
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116 end
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117 end
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118
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119 module:hook("muc-occupant-groupchat", tweet_handler)
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120
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121
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122 module:hook("muc-message-is-historic", function (event)
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123 local fastening = event.stanza:get_child('apply-to', xmlns_fasten)
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124 if fastening and fastening:get_child('meta', xmlns_xhtml) then
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125 return true
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126 end
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127 end);