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annotate mod_http_pep_avatar/mod_http_pep_avatar.lua @ 5696:66986f5271c3

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mod_storage_s3: Skip archive items matching on date but not full datetime Since it only encodes dates in paths, it would have returned items from outside the specified start..end range if they were from earlier or later in the same (UTC) day.
author Kim Alvefur <zash@zash.se>
date Sat, 11 Nov 2023 22:26:39 +0100
parents 02d238799537
children
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461429e0db58 mod_http_pep_avatar: Provides PEP avatars via HTTP
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diff changeset
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, path)
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15 if path == "" 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 user, item_id = path:match("^([^/]+)/(%x+)$");
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23 if not user then user = path; end
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24 local prepped = nodeprep(user);
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25 if not prepped then return 400; end
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26 if prepped ~= user then
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27 response.headers.location = module:http_url() .. "/" .. urlencode(prepped);
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28 return 302;
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29 end
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30 if not um.user_exists(user, module.host) then
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31 return 404;
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32 end
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33
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34 local pep_service = mod_pep.get_pep_service(user);
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35
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36 local ok, avatar_hash, avatar_meta = pep_service:get_last_item("urn:xmpp:avatar:metadata", actor);
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37
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38 if not ok or not avatar_hash then
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39 return 404;
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40 end
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42 if (item_id or avatar_hash) == request.headers.if_none_match then
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43 return 304;
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44 end
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45
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46 local data_ok, avatar_data = pep_service:get_items("urn:xmpp:avatar:data", actor, item_id or avatar_hash);
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47 if not data_ok or type(avatar_data) ~= "table" or not avatar_data[item_id or avatar_hash] then
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48 return 404;
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49 end
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50
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51 local info = avatar_meta.tags[1]:get_child("info");
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52 if item_id and info.attr.id ~= item_id then
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53 info = nil;
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54 for altinfo in avatar_meta.tags[1]:childtags("info") do
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55 if altinfo.attr.id == item_id then
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56 info = altinfo;
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57 end
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58 end
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59 end
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60
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61 if not info then
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62 return 404;
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63 end
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64
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65 response.headers.etag = item_id or avatar_hash;
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66
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67 response.headers.content_type = info and info.attr.type or "application/octet-stream";
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68
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69 local data = avatar_data[item_id or avatar_hash];
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70 return base64_decode(data.tags[1]:get_text());
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71 end;
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72 }
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73 });