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annotate mod_http_pep_avatar/mod_http_pep_avatar.lua @ 3958:cacd753848b2

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mod_conversejs/README: Add an example of the URL to open
author Kim Alvefur <zash@zash.se>
date Mon, 30 Mar 2020 16:29:44 +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 });