prosody-modules
1cff081abbed
mod_http_avatar/mod_http_avatar.lua

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mod_http_avatar/mod_http_avatar.lua @ 3082:1cff081abbed

mod_http_avatar: Add a module to serve vCard-temp avatars over HTTP.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Fri, 01 Jun 2018 22:05:46 +0200
child 3083:46d71b38bc16
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rev   line source
3082
1cff081abbed mod_http_avatar: Add a module to serve vCard-temp avatars over HTTP.
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1 -- Prosody IM
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2 -- Copyright (C) 2018 Emmanuel Gil Peyrot
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3 --
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4 -- This project is MIT/X11 licensed. Please see the
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5 -- COPYING file in the source package for more information.
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6
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7 local base64 = require"util.encodings".base64;
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8 local st = require"util.stanza";
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9 module:depends"http";
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10
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11 local vcard_storage = module:open_store"vcard";
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12
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13 local default_avatar = [[<svg xmlns='http://www.w3.org/2000/svg' version='1.1' viewBox='0 0 150 150'>
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14 <rect width='150' height='150' fill='#888' stroke-width='1' stroke='#000'/>
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15 <text x='75' y='100' text-anchor='middle' font-size='100'>?</text>
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16 </svg>]];
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17
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18 local function get_avatar(event, path)
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19 local request, response = event.request, event.response;
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20 local photo_type, binval;
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21 local vcard, err = vcard_storage:get(path);
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22 if vcard then
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23 vcard = st.deserialize(vcard);
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24 local photo = vcard:get_child("PHOTO", "vcard-temp");
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25 if photo then
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26 photo_type = photo:get_child_text("TYPE", "vcard-temp");
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27 binval = photo:get_child_text("BINVAL", "vcard-temp");
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28 end
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29 end
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30 if not photo_type or not binval then
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31 response.status_code = 404;
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32 response.headers.content_type = "image/svg+xml";
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33 return default_avatar;
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34 end
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35 response.headers.content_type = photo_type;
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36 return base64.decode(binval);
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37 end
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38
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39 module:provides("http", {
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40 route = {
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41 ["GET /*"] = get_avatar;
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42 };
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43 });