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mod_http_avatar/mod_http_avatar.lua @ 5839:45d0802d0787
mod_pubsub_serverinfo: Allow configuration of node persistence/deletion
author | Matthew Wild <mwild1@gmail.com> |
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date | Mon, 08 Jan 2024 15:54:09 +0000 |
parent | 5743:0f103a6e9ba4 |
rev | line source |
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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 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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13 |
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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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18 |
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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 -- FIXME: should be a 404, but Firefox won’t display it in that case… |
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33 --response.status_code = 404; |
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34 response.headers.content_type = "image/svg+xml"; |
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35 return default_avatar; |
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36 end |
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37 local avatar = base64.decode(binval); |
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38 local hash = sha1(avatar, true); |
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39 if request.headers.if_none_match == hash then |
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40 return 304; |
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41 end |
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42 response.headers.content_type = photo_type; |
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43 response.headers.etag = hash; |
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44 return avatar; |
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45 end |
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46 |
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47 module:provides("http", { |
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48 route = { |
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49 ["GET /*"] = get_avatar; |
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50 }; |
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51 }); |