Mercurial > prosody-modules

annotate mod_http_avatar/mod_http_avatar.lua @ 5119:048e339706ba

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mod_rest: Remove manual reference expansion in schema This hack was originally added to reduce the number of definitions of common attributes (type, to, from etc) and payloads (e.g. delay). This predated pointers and references, and until now was needed because parsing picked out the correct stanza kind from the schema, which broke internal references. Removing this hack paves the way for allowing the schema to be configured or customized more easily.
author Kim Alvefur <zash@zash.se>
date Tue, 20 Dec 2022 21:48:28 +0100
parents 5b4e7db5943c
children 0f103a6e9ba4
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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 });