prosody-modules
5b4e7db5943c
mod_http_avatar/mod_http_avatar.lua

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mod_http_avatar/mod_http_avatar.lua @ 3084:5b4e7db5943c

mod_http_avatar: Add caching support.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Fri, 01 Jun 2018 22:45:41 +0200
parent 3083:46d71b38bc16
child 5743:0f103a6e9ba4
comparison
equal deleted inserted replaced
3083:46d71b38bc16 3084:5b4e7db5943c
3 -- 3 --
4 -- This project is MIT/X11 licensed. Please see the 4 -- This project is MIT/X11 licensed. Please see the
5 -- COPYING file in the source package for more information. 5 -- COPYING file in the source package for more information.
6 6
7 local base64 = require"util.encodings".base64; 7 local base64 = require"util.encodings".base64;
8 local sha1 = require"util.hashes".sha1;
8 local st = require"util.stanza"; 9 local st = require"util.stanza";
9 module:depends"http"; 10 module:depends"http";
10 11
11 local vcard_storage = module:open_store"vcard"; 12 local vcard_storage = module:open_store"vcard";
12 13
14 <rect width='150' height='150' fill='#888' stroke-width='1' stroke='#000'/> 15 <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 <text x='75' y='100' text-anchor='middle' font-size='100'>?</text>
16 </svg>]]; 17 </svg>]];
17 18
18 local function get_avatar(event, path) 19 local function get_avatar(event, path)
19 local response = event.response; 20 local request, response = event.request, event.response;
20 local photo_type, binval; 21 local photo_type, binval;
21 local vcard, err = vcard_storage:get(path); 22 local vcard, err = vcard_storage:get(path);
22 if vcard then 23 if vcard then
23 vcard = st.deserialize(vcard); 24 vcard = st.deserialize(vcard);
24 local photo = vcard:get_child("PHOTO", "vcard-temp"); 25 local photo = vcard:get_child("PHOTO", "vcard-temp");
30 if not photo_type or not binval then 31 if not photo_type or not binval then
31 response.status_code = 404; 32 response.status_code = 404;
32 response.headers.content_type = "image/svg+xml"; 33 response.headers.content_type = "image/svg+xml";
33 return default_avatar; 34 return default_avatar;
34 end 35 end
36 local avatar = base64.decode(binval);
37 local hash = sha1(avatar, true);
38 if request.headers.if_none_match == hash then
39 return 304;
40 end
35 response.headers.content_type = photo_type; 41 response.headers.content_type = photo_type;
36 return base64.decode(binval); 42 response.headers.etag = hash;
43 return avatar;
37 end 44 end
38 45
39 module:provides("http", { 46 module:provides("http", {
40 route = { 47 route = {
41 ["GET /*"] = get_avatar; 48 ["GET /*"] = get_avatar;