Mercurial > prosody-modules

annotate mod_cache_c2s_caps/mod_cache_c2s_caps.lua @ 5571:ca3c2d11823c

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mod_pubsub_feeds: Track latest timestamp seen in feeds instead of last poll This should ensure that an entry that has a publish timestmap after the previously oldest post, but before the time of the last poll check, is published to the node. Previously if an entry would be skipped if it was published at 13:00 with a timestamp of 12:30, where the last poll was at 12:45. For feeds that lack a timestamp, it now looks for the first post that is not published, assuming that the feed is in reverse chronological order, then iterates back up from there.
author Kim Alvefur <zash@zash.se>
date Sun, 25 Jun 2023 16:27:55 +0200
parents 8fc16174fec6
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 local st_iq = require "util.stanza".iq;
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2 local uuid_gen = require "util.uuid".generate;
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3 local calculate_hash = require "util.caps".calculate_hash;
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4
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5 -- Map of jid..node, to avoid querying the same client multiple times for the same value.
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6 local in_flight_iqs = {}
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7
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8 -- Some clients (*ahem* poezio…) don’t include the @node in their result iq.
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9 local iq_node_map = {}
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10
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11 assert(module.send_iq, "This module is not compatible with this version of Prosody.");
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12
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13 local function iq_result_handler(event)
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14 local origin, stanza = event.origin, event.stanza;
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15
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16 local query = stanza:get_child("query", "http://jabber.org/protocol/disco#info");
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17 if not query then
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18 origin.log("debug", "Wrong iq payload in disco#info result: %s", stanza);
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19 origin.caps_cache = nil;
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20 return;
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21 end
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22
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23 local from = stanza.attr.from;
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24 local id = stanza.attr.id;
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25 local node_string = query.attr.node;
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26 local node_query = iq_node_map[from..id];
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27 if node_string == nil then
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28 node_string = node_query;
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29 query.attr.node = node_query;
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30 end
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31 iq_node_map[from..id] = nil;
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32
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33 if node_string ~= node_query then
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34 origin.log("debug", "Wrong node for our disco#info query, expected %s, received %s", node_string, node_query);
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35 origin.caps_cache = nil;
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36 return;
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37 end
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38
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39 local node, ver = node_query:match("([^#]+)#([^#]+)");
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40 local hash = calculate_hash(query)
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41 if ver ~= hash then
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42 origin.log("debug", "Wrong hash for disco#info: %s ~= %s", ver, hash);
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43 origin.caps_cache = nil;
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44 return;
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45 end
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46
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47 origin.caps_cache = query;
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48 origin.log("info", "Stored caps %s", ver);
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49 module:fire_event("c2s-capabilities-changed", { origin = origin });
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50 return true;
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51 end
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52
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53 local function iq_error_handler(err)
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54 local origin = err.context.origin;
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55 if origin ~= nil then
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56 origin.caps_cache = nil;
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57 module:fire_event("c2s-capabilities-changed", { origin = origin });
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58 end
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59 end
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60
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61 local function presence_stanza_handler(event)
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62 local origin, stanza = event.origin, event.stanza;
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63
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64 local from = stanza.attr.from;
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65 if stanza.attr.to ~= nil then
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66 return;
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67 end
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68
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69 local caps = stanza:get_child("c", "http://jabber.org/protocol/caps");
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70 if caps == nil then
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71 origin.log("debug", "Presence from %s without caps received, skipping", from);
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72 return;
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73 end
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74
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75 local hash = caps.attr.hash;
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76 local node = caps.attr.node;
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77 local ver = caps.attr.ver;
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78 if not hash or not node or not ver then
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79 return;
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80 end
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81 if hash ~= "sha-1" then
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82 origin.log("warn", "Presence from %s with non-SHA-1 caps : %s", from, hash);
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83 return;
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84 end
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85
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86 local node_query = node.."#"..ver;
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87 if (origin.caps_cache and origin.caps_cache.attr.node == node_query) or in_flight_iqs[from..node_query] ~= nil then
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88 origin.log("debug", "Already requested these caps, skipping");
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89 return;
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90 end
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91
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92 origin.log("debug", "Presence from %s with SHA-1 caps %s, querying disco#info", from, node_query);
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93
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94 local id = uuid_gen();
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95 iq_node_map[from..id] = node_query
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96 local iq = st_iq({ type = "get", from = module.host, to = from, id = id })
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97 :tag("query", { xmlns = "http://jabber.org/protocol/disco#info", node = node_query });
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98 in_flight_iqs[from..node_query] = true;
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99 module:send_iq(iq, origin)
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100 :next(iq_result_handler, iq_error_handler)
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101 :finally(function () in_flight_iqs[from..node_query] = nil; end)
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102 end
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103
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104 -- Handle only non-directed presences for now.
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105 module:hook("pre-presence/bare", presence_stanza_handler);