Mercurial > prosody-modules

annotate mod_pep_vcard_png_avatar/mod_pep_vcard_png_avatar.lua @ 2983:fa3665b7602f

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mod_post_msg/README: Normalize markdown syntax
author Kim Alvefur <zash@zash.se>
date Wed, 04 Apr 2018 15:36:47 +0200
parents e6a3bdbce7b9
children c22b6283d226
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2014 Matthew Wild
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3 -- Copyright (C) 2008-2014 Waqas Hussain
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4 -- Copyright (C) 2014 Kim Alvefur
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5 --
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6 -- This project is MIT/X11 licensed. Please see the
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7 -- COPYING file in the source package for more information.
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8 --
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9
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10 local st = require "util.stanza"
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11 local jid = require "util.jid";
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12 local base64 = require"util.encodings".base64;
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13 local sha1 = require"util.hashes".sha1;
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14
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15 local mod_pep = module:depends"pep";
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16 local pep_data = mod_pep.module.save().data;
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17
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18 module:add_feature("http://prosody.im/protocol/vcard-pep-integration");
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19 module:depends"vcard";
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20 local vcard_storage = module:open_store("vcard");
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21
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22 local function get_vcard(username)
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23 local vcard, err = vcard_storage:get(username);
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24 if vcard then
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25 vcard = st.deserialize(vcard);
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26 end
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27 if not vcard then
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28 vcard = st.stanza("vCard", { xmlns = "vcard-temp" });
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29 end
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30 return vcard, err;
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31 end
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32
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33 local function replace_tag(s, replacement)
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34 local once = false;
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35 s:maptags(function (tag)
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36 if tag.name == replacement.name and tag.attr.xmlns == replacement.attr.xmlns then
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37 if not once then
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38 once = true;
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39 return replacement;
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40 else
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41 return nil;
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42 end
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43 end
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44 return tag;
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45 end);
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46 if not once then
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47 s:add_child(replacement);
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48 end
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49 end
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50
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51 local function set_vcard(username, vcard)
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52 if vcard then
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53 vcard = st.preserialize(st.clone(vcard));
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54 end
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55 return vcard_storage:set(username, vcard);
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56 end
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57
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58 local function publish(session, node, id, item)
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59 return module:fire_event("pep-publish-item", {
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60 actor = true, user = jid.bare(session.full_jid), session = session, node = node, id = id, item = item;
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61 });
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62 end
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63
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64 -- vCard -> PEP
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65 local function update_pep(session, vcard)
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66 if not vcard then return end
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67 local nickname = vcard:get_child_text("NICKNAME");
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68 if nickname then
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69 publish(session, "http://jabber.org/protocol/nick", "current", st.stanza("item", {id="current"})
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70 :tag("nick", { xmlns="http://jabber.org/protocol/nick" }):text(nickname));
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71 end
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72
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73 local photo = vcard:get_child("PHOTO");
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74 if photo then
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75 local photo_type = photo:get_child_text("TYPE");
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76 local photo_b64 = photo:get_child_text("BINVAL");
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77 local photo_raw = photo_b64 and base64.decode(photo_b64);
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78 if photo_raw and photo_type then -- Else invalid data or encoding
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79 local photo_hash = sha1(photo_raw, true);
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80
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81 publish(session, "urn:xmpp:avatar:data", photo_hash, st.stanza("item", {id=photo_hash})
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82 :tag("data", { xmlns="urn:xmpp:avatar:data" }):text(photo_b64));
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83 publish(session, "urn:xmpp:avatar:metadata", photo_hash, st.stanza("item", {id=photo_hash})
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84 :tag("metadata", { xmlns="urn:xmpp:avatar:metadata" })
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85 :tag("info", { id = photo_hash, bytes = tostring(#photo_raw), type = photo_type,}));
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86 end
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87 end
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88 end
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89
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90 local function handle_vcard(event)
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91 local session, stanza = event.origin, event.stanza;
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92 if not stanza.attr.to and stanza.attr.type == "set" then
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93 return update_pep(session, stanza:get_child("vCard", "vcard-temp"));
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94 end
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95 end
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96
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97 module:hook("iq/bare/vcard-temp:vCard", handle_vcard, 1);
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98
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99 -- PEP Avatar -> vCard
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100 local function on_publish_metadata(event)
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101 local username = event.session.username;
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102 local metadata = event.item:find("{urn:xmpp:avatar:metadata}metadata/info");
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103 if not metadata then
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104 module:log("error", "No info found");
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105 module:log("debug", event.item:top_tag());
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106 return;
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107 end
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108 module:log("debug", metadata:top_tag());
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109 local user_data = pep_data[username.."@"..module.host];
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110 local pep_photo = user_data["urn:xmpp:avatar:data"];
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111 pep_photo = pep_photo and pep_photo[1] == metadata.attr.id and pep_photo[2];
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112 if not pep_photo then
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113 module:log("error", "No photo found");
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114 return;
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115 end -- Publishing in the wrong order?
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116 local image=pep_photo:get_child_text("data", "urn:xmpp:avatar:data");
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117 if pep_photo and metadata.attr.type == "image/webp" then
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118 local file_webp = io.open("/tmp/Prosody_temp_avatar.webp", "w");
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119 file_webp:write(base64.decode(pep_photo:get_child_text("data", "urn:xmpp:avatar:data")));
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120 file_webp:close();
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121 os.execute("dwebp /tmp/Prosody_temp_avatar.webp -o /tmp/Prosody_temp_avatar.png");
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122 local file_png = io.open("/tmp/Prosody_temp_avatar.png", "r");
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123 if file_png ~= nil then
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124 image=base64.encode(file_png:read("*a"));
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125 file_png:close();
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126 else
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127 module:log("error", "Couldn't access /tmp/Prosody_temp_avatar.png. Are you sure that /tmp is readable and writable and that Prosody can execute the dwebp command?");
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128 end
2216
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129 os.remove("/tmp/Prosody_temp_avatar.webp");
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130 os.remove("/tmp/Prosody_temp_avatar.png");
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131 end
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132 local vcard = get_vcard(username);
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133 local new_photo = st.stanza("PHOTO", { xmlns = "vcard-temp" })
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134 :tag("TYPE"):text(metadata.attr.type):up()
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135 :tag("BINVAL"):text(image);
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136
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137 replace_tag(vcard, new_photo);
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138 set_vcard(username, vcard);
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139 end
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140
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141 -- PEP Nickname -> vCard
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142 local function on_publish_nick(event)
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143 local username = event.session.username;
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144 local vcard = get_vcard(username);
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145 local new_nick = st.stanza("NICKNAME", { xmlns = "vcard-temp" })
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146 :text(event.item:get_child_text("nick", "http://jabber.org/protocol/nick"));
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147 replace_tag(vcard, new_nick);
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148 set_vcard(username, vcard);
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149 end
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150
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151 local function on_publish(event)
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152 if event.actor == true then return end -- Not from a client
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153 local node = event.node;
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154 if node == "urn:xmpp:avatar:metadata" then
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155 return on_publish_metadata(event);
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156 elseif node == "http://jabber.org/protocol/nick" then
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157 return on_publish_nick(event);
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158 end
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159 end
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160
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161 module:hook("pep-publish-item", on_publish, 1);