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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3081:e0ef90e96931 3082:1cff081abbed
1 -- Prosody IM
2 -- Copyright (C) 2018 Emmanuel Gil Peyrot
3 --
4 -- This project is MIT/X11 licensed. Please see the
5 -- COPYING file in the source package for more information.
6
7 local base64 = require"util.encodings".base64;
8 local st = require"util.stanza";
9 module:depends"http";
10
11 local vcard_storage = module:open_store"vcard";
12
13 local default_avatar = [[<svg xmlns='http://www.w3.org/2000/svg' version='1.1' viewBox='0 0 150 150'>
14 <rect width='150' height='150' fill='#888' stroke-width='1' stroke='#000'/>
15 <text x='75' y='100' text-anchor='middle' font-size='100'>?</text>
16 </svg>]];
17
18 local function get_avatar(event, path)
19 local request, response = event.request, event.response;
20 local photo_type, binval;
21 local vcard, err = vcard_storage:get(path);
22 if vcard then
23 vcard = st.deserialize(vcard);
24 local photo = vcard:get_child("PHOTO", "vcard-temp");
25 if photo then
26 photo_type = photo:get_child_text("TYPE", "vcard-temp");
27 binval = photo:get_child_text("BINVAL", "vcard-temp");
28 end
29 end
30 if not photo_type or not binval then
31 response.status_code = 404;
32 response.headers.content_type = "image/svg+xml";
33 return default_avatar;
34 end
35 response.headers.content_type = photo_type;
36 return base64.decode(binval);
37 end
38
39 module:provides("http", {
40 route = {
41 ["GET /*"] = get_avatar;
42 };
43 });