verse
762511350532
plugins/smacks.lua

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plugins/smacks.lua @ 287:762511350532

doc/example_carbons.lua: Update to reflect timestamp change in carbons plugin.
author Kim Alvefur <zash@zash.se>
date Sat, 17 Mar 2012 16:00:16 +0100
parent 250:a5ac643a7fd6
child 320:e04f10664704
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
250
a5ac643a7fd6 added local verse var to all plugins
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1 local verse = require "verse";
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2
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3 local xmlns_sm = "urn:xmpp:sm:2";
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4
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5 function verse.plugins.smacks(stream)
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6 -- State for outgoing stanzas
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7 local outgoing_queue = {};
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8 local last_ack = 0;
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9
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10 -- State for incoming stanzas
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11 local handled_stanza_count = 0;
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12
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13 -- Catch incoming stanzas
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14 local function incoming_stanza(stanza)
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15 if stanza.attr.xmlns == "jabber:client" or not stanza.attr.xmlns then
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16 handled_stanza_count = handled_stanza_count + 1;
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17 stream:debug("Increasing handled stanzas to %d for %s", handled_stanza_count, stanza:top_tag());
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18 end
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19 end
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20
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21 local function on_disconnect()
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22 stream:debug("smacks: connection lost");
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23 stream.stream_management_supported = nil;
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24 if stream.resumption_token then
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25 stream:debug("smacks: have resumption token, reconnecting in 1s...");
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26 stream.authenticated = nil;
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27 verse.add_task(1, function ()
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28 stream:connect(stream.connect_host or stream.host, stream.connect_port or 5222);
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29 end);
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30 return true;
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31 end
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32 end
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33
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34 local function handle_sm_command(stanza)
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35 if stanza.name == "r" then -- Request for acks for stanzas we received
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36 stream:debug("Ack requested... acking %d handled stanzas", handled_stanza_count);
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37 stream:send(verse.stanza("a", { xmlns = xmlns_sm, h = tostring(handled_stanza_count) }));
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38 elseif stanza.name == "a" then -- Ack for stanzas we sent
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39 local new_ack = tonumber(stanza.attr.h);
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40 if new_ack > last_ack then
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41 local old_unacked = #outgoing_queue;
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42 for i=last_ack+1,new_ack do
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43 table.remove(outgoing_queue, 1);
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44 end
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45 stream:debug("Received ack: New ack: "..new_ack.." Last ack: "..last_ack.." Unacked stanzas now: "..#outgoing_queue.." (was "..old_unacked..")");
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46 last_ack = new_ack;
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47 else
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48 stream:warn("Received bad ack for "..new_ack.." when last ack was "..last_ack);
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49 end
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50 elseif stanza.name == "enabled" then
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51 stream.smacks = true;
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52 -- Catch outgoing stanzas
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53 local old_send = stream.send;
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54 function stream.send(stream, stanza)
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55 stream:warn("SENDING");
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56 if not stanza.attr.xmlns then
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57 outgoing_queue[#outgoing_queue+1] = stanza;
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58 local ret = old_send(stream, stanza);
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59 old_send(stream, verse.stanza("r", { xmlns = xmlns_sm }));
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60 return ret;
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61 end
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62 return old_send(stream, stanza);
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63 end
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64 -- Catch incoming stanzas
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65 stream:hook("stanza", incoming_stanza);
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66
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67 if stanza.attr.id then
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68 stream.resumption_token = stanza.attr.id;
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69 stream:hook("disconnected", on_disconnect, 100);
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70 end
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71 elseif stanza.name == "resumed" then
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72 --TODO: Check h of the resumed element, discard any acked stanzas from
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73 -- our queue (to prevent duplicates), then re-send any lost stanzas.
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74 stream:debug("Resumed successfully");
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75 stream:event("resumed");
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76 else
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77 stream:warn("Don't know how to handle "..xmlns_sm.."/"..stanza.name);
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78 end
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79 end
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80
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81 local function on_bind_success()
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82 if not stream.smacks then
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83 --stream:unhook("bind-success", on_bind_success);
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84 stream:debug("smacks: sending enable");
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85 stream:send(verse.stanza("enable", { xmlns = xmlns_sm, resume = "true" }));
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86 end
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87 end
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88
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89 local function on_features(features)
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90 if features:get_child("sm", xmlns_sm) then
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91 stream.stream_management_supported = true;
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92 if stream.smacks and stream.bound then -- Already enabled in a previous session - resume
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93 stream:debug("Resuming stream with %d handled stanzas", handled_stanza_count);
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94 stream:send(verse.stanza("resume", { xmlns = xmlns_sm,
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95 h = handled_stanza_count, previd = stream.resumption_token }));
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96 return true;
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97 else
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98 stream:hook("bind-success", on_bind_success, 1);
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99 end
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100 end
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101 end
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102
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103 stream:hook("stream-features", on_features, 250);
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104 stream:hook("stream/"..xmlns_sm, handle_sm_command);
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105 --stream:hook("ready", on_stream_ready, 500);
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106 end