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annotate mod_muc_restrict_media/mod_muc_restrict_media.lua @ 5383:df11a2cbc7b7

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mod_http_oauth2: Implement RFC 7628 Proof Key for Code Exchange Likely to become mandatory in OAuth 2.1. Backwards compatible since the default 'plain' verifier would compare nil with nil if the relevant parameters are left out.
author Kim Alvefur <zash@zash.se>
date Sat, 29 Apr 2023 13:09:46 +0200
parents 1682166171ff
children
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1 module:depends"muc";
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2
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3 local restrict_by_default = module:get_option_boolean("muc_room_default_restrict_media", true);
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4
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5 local function should_restrict_media(room)
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6 local restrict_media = room._data.restrict_media;
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7 if restrict_media == nil then
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8 restrict_media = restrict_by_default;
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9 end
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10 return restrict_media;
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11 end
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12
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13 module:hook("muc-config-form", function(event)
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14 local room, form = event.room, event.form;
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15 table.insert(form, {
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16 name = "{xmpp:prosody.im}muc#roomconfig_unaffiliated_media",
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17 type = "boolean",
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18 label = "Display inline media (images, etc.) from non-members",
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19 value = not should_restrict_media(room),
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20 });
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21 end);
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22
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23 module:hook("muc-config-submitted", function(event)
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24 local room, fields, changed = event.room, event.fields, event.changed;
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25 local new_restrict_media = not fields["{xmpp:prosody.im}muc#roomconfig_unaffiliated_media"];
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26 if new_restrict_media ~= should_restrict_media(room) then
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27 if new_restrict_media == restrict_by_default then
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28 room._data.restrict_media = nil;
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29 else
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30 room._data.restrict_media = new_restrict_media;
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31 end
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32 if type(changed) == "table" then
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33 changed["{xmpp:prosody.im}muc#roomconfig_unaffiliated_media"] = true;
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34 else
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35 event.changed = true;
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36 end
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37 end
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38 end);
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39
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40 module:hook("muc-disco#info", function (event)
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41 local room, form, formdata = event.room, event.form, event.formdata;
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42
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43 local allow_unaffiliated_media = not should_restrict_media(room);
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44 table.insert(form, {
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45 name = "{xmpp:prosody.im}muc#roomconfig_unaffiliated_media",
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46 type = "boolean",
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47 });
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48 formdata["{xmpp:prosody.im}muc#roomconfig_unaffiliated_media"] = allow_unaffiliated_media;
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49 end);
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50
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51 local function strip_xhtml_img(tag)
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52 if tag.attr.xmlns == "http://www.w3.org/1999/xhtml" and tag.name == "img" then
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53 tag.name = "i";
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54 tag:text(tag.attr.alt or "<image blocked>");
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55 tag.attr = { xmlns = tag.attr.xmlns, title = tag.attr.title };
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56 tag:maptags(strip_xhtml_img);
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57 else
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58 tag:maptags(strip_xhtml_img);
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59 end
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60
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61 return tag;
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62 end
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63
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64 local function filter_media_tags(tag)
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65 local xmlns = tag.attr.xmlns;
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66 if xmlns == "jabber:x:oob" then
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67 return nil;
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68 elseif xmlns == "urn:xmpp:reference:0" then
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69 if tag:get_child("media-sharing", "urn:xmpp:sims:1") then
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70 return nil;
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71 end
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72 elseif xmlns == "http://jabber.org/protocol/xhtml-im" then
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73 return strip_xhtml_img(tag);
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74 end
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75 return tag;
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76 end
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77
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78 module:hook("muc-occupant-groupchat", function (event)
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79 local stanza = event.stanza;
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80 if stanza.attr.type ~= "groupchat" then return; end
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81 if event.room:get_affiliation(stanza.attr.from) then return end
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82 if should_restrict_media(event.room) then
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83 stanza:maptags(filter_media_tags);
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84 end
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85 end, 20);