prosody-modules
44f7edd4f845
mod_http_avatar/mod_http_avatar.lua

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mod_http_avatar/mod_http_avatar.lua @ 5256:44f7edd4f845

mod_http_oauth2: Reject non-local hosts in more code paths We're not issuing tokens for users on remote hosts, we can't even authenticate them since they're remote. Thus the host is always the local module.host so no need to pass around the host in most cases or use it for anything but enforcing the same host.
author Kim Alvefur <zash@zash.se>
date Thu, 16 Mar 2023 17:52:10 +0100 (24 months ago)
parent 3084:5b4e7db5943c
child 5743:0f103a6e9ba4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 sha1 = require"util.hashes".sha1;
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9 local st = require"util.stanza";
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10 module:depends"http";
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11
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12 local vcard_storage = module:open_store"vcard";
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14 local default_avatar = [[<svg xmlns='http://www.w3.org/2000/svg' version='1.1' viewBox='0 0 150 150'>
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15 <rect width='150' height='150' fill='#888' stroke-width='1' stroke='#000'/>
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16 <text x='75' y='100' text-anchor='middle' font-size='100'>?</text>
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17 </svg>]];
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19 local function get_avatar(event, path)
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20 local request, response = event.request, event.response;
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21 local photo_type, binval;
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22 local vcard, err = vcard_storage:get(path);
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23 if vcard then
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24 vcard = st.deserialize(vcard);
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25 local photo = vcard:get_child("PHOTO", "vcard-temp");
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26 if photo then
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27 photo_type = photo:get_child_text("TYPE", "vcard-temp");
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28 binval = photo:get_child_text("BINVAL", "vcard-temp");
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29 end
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30 end
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31 if not photo_type or not binval then
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32 response.status_code = 404;
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33 response.headers.content_type = "image/svg+xml";
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34 return default_avatar;
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35 end
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36 local avatar = base64.decode(binval);
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37 local hash = sha1(avatar, true);
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38 if request.headers.if_none_match == hash then
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39 return 304;
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40 end
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41 response.headers.content_type = photo_type;
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42 response.headers.etag = hash;
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43 return avatar;
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44 end
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45
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46 module:provides("http", {
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47 route = {
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48 ["GET /*"] = get_avatar;
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49 };
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50 });