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annotate mod_http_pep_avatar/mod_http_pep_avatar.lua @ 3715:f03a023cd523

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mod_http_muc_log: Compose page title from room data More flexible than composing the title from name and date in the controller. Also opens the door to using other room data fields.
author Kim Alvefur <zash@zash.se>
date Sun, 13 Oct 2019 16:16:14 +0200
parents 00bdecb12779
children 02d238799537
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461429e0db58 mod_http_pep_avatar: Provides PEP avatars via HTTP
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1 -- HTTP Access to PEP Avatar
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2 -- By Kim Alvefur <zash@zash.se>
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3
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4 local mod_pep = module:depends"pep";
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5
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6 local um = require "core.usermanager";
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7 local nodeprep = require "util.encodings".stringprep.nodeprep;
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8 local base64_decode = require "util.encodings".base64.decode;
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9 local urlencode = require "util.http".urlencode;
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10
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11 module:depends("http")
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12 module:provides("http", {
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13 route = {
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14 ["GET /*"] = function (event, user)
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15 if user == "" then
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16 return [[<h1>Hello from mod_http_pep_avatar</h1><p>This module provides access to public avatars of local users.</p>]];
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17 end;
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18
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19 local request, response = event.request, event.response;
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20 local actor = request.ip;
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21
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22 local prepped = nodeprep(user);
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23 if not prepped then return 400; end
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24 if prepped ~= user then
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25 response.headers.location = module:http_url() .. "/" .. urlencode(prepped);
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26 return 302;
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27 end
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28 if not um.user_exists(user, module.host) then
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29 return 404;
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30 end
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31
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32 local pep_service = mod_pep.get_pep_service(user);
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33
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34 local ok, avatar_hash, avatar_meta = pep_service:get_last_item("urn:xmpp:avatar:metadata", actor);
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35
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36 if not ok or not avatar_hash then
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37 return 404;
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38 end
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40 if avatar_hash == request.headers.if_none_match then
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41 return 304;
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42 end
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43
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44 local data_ok, avatar_data = pep_service:get_items("urn:xmpp:avatar:data", actor, avatar_hash);
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45 if not data_ok or type(avatar_data) ~= "table" or not avatar_data[avatar_hash] then
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46 return 404;
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47 end
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49 response.headers.etag = avatar_hash;
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50
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51 local info = avatar_meta.tags[1]:get_child("info");
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52 response.headers.content_type = info and info.attr.type or "application/octet-stream";
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53
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54 local data = avatar_data[avatar_hash];
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55 return base64_decode(data.tags[1]:get_text());
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56 end;
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57 }
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58 });