prosody
545c81364939
plugins/mod_roster.lua

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plugins/mod_roster.lua @ 1198:545c81364939

mod_roster: Don't send a query element in roster response if roster is unchanged
author Matthew Wild <mwild1@gmail.com>
date Tue, 26 May 2009 01:07:21 +0100
parent 1133:b293d7dc6a45
child 1200:57a72472e1bc
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
896
2c0b9e3c11c3 0.3->0.4
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1 -- Prosody IM v0.4
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2 -- Copyright (C) 2008-2009 Matthew Wild
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3 -- Copyright (C) 2008-2009 Waqas Hussain
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4 --
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b1885732e979 GPL->MIT!
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9
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10
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11 local st = require "util.stanza"
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12
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13 local jid_split = require "util.jid".split;
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14 local jid_prep = require "util.jid".prep;
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15 local t_concat = table.concat;
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16 local tostring = tostring;
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17
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18 local handle_presence = require "core.presencemanager".handle_presence;
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19 local rm_remove_from_roster = require "core.rostermanager".remove_from_roster;
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20 local rm_add_to_roster = require "core.rostermanager".add_to_roster;
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21 local rm_roster_push = require "core.rostermanager".roster_push;
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22 local core_route_stanza = core_route_stanza;
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23
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24 module:add_feature("jabber:iq:roster");
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25
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26 local rosterver_stream_feature = st.stanza("ver", {xmlns="urn:xmpp:features:rosterver"}):tag("optional"):up();
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27 module:add_event_hook("stream-features",
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28 function (session, features)
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29 if session.username then
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30 features:add_child(rosterver_stream_feature);
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31 end
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32 end);
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33
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34 module:add_iq_handler("c2s", "jabber:iq:roster",
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35 function (session, stanza)
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36 if stanza.tags[1].name == "query" then
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37 if stanza.attr.type == "get" then
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38 local roster = st.reply(stanza);
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39
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40 local ver = stanza.tags[1].attr.ver
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41
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42 if (not ver) or tonumber(ver) ~= (session.roster[false].version or 1) then
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43 roster:query("jabber:iq:roster");
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44 -- Client does not support versioning, or has stale roster
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45 for jid in pairs(session.roster) do
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46 if jid ~= "pending" and jid then
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47 roster:tag("item", {
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48 jid = jid,
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49 subscription = session.roster[jid].subscription,
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50 ask = session.roster[jid].ask,
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51 name = session.roster[jid].name,
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52 });
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53 for group in pairs(session.roster[jid].groups) do
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54 roster:tag("group"):text(group):up();
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55 end
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56 roster:up(); -- move out from item
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57 end
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58 end
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59 roster.tags[1].attr.ver = tostring(session.roster[false].version or "1");
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60 end
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61 session.send(roster);
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62 session.interested = true; -- resource is interested in roster updates
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63 return true;
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64 elseif stanza.attr.type == "set" then
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65 local query = stanza.tags[1];
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66 if #query.tags == 1 and query.tags[1].name == "item"
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67 and query.tags[1].attr.xmlns == "jabber:iq:roster" and query.tags[1].attr.jid
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68 -- Protection against overwriting roster.pending, until we move it
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69 and query.tags[1].attr.jid ~= "pending" then
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70 local item = query.tags[1];
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71 local from_node, from_host = jid_split(stanza.attr.from);
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72 local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID
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73 local jid = jid_prep(item.attr.jid);
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74 local node, host, resource = jid_split(jid);
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75 if not resource and host then
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76 if jid ~= from_node.."@"..from_host then
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77 if item.attr.subscription == "remove" then
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78 local r_item = session.roster[jid];
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79 if r_item then
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80 local success, err_type, err_cond, err_msg = rm_remove_from_roster(session, jid);
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81 if success then
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82 session.send(st.reply(stanza));
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83 rm_roster_push(from_node, from_host, jid);
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84 local to_bare = node and (node.."@"..host) or host; -- bare JID
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85 if r_item.subscription == "both" or r_item.subscription == "from" then
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86 handle_presence(session, st.presence({type="unsubscribed"}), from_bare, to_bare,
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87 core_route_stanza, false);
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88 elseif r_item.subscription == "both" or r_item.subscription == "to" then
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89 handle_presence(session, st.presence({type="unsubscribe"}), from_bare, to_bare,
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90 core_route_stanza, false);
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91 end
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92 else
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93 session.send(st.error_reply(stanza, err_type, err_cond, err_msg));
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94 end
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95 else
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96 session.send(st.error_reply(stanza, "modify", "item-not-found"));
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97 end
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98 else
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99 local r_item = {name = item.attr.name, groups = {}};
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100 if r_item.name == "" then r_item.name = nil; end
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101 if session.roster[jid] then
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102 r_item.subscription = session.roster[jid].subscription;
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103 r_item.ask = session.roster[jid].ask;
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104 else
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105 r_item.subscription = "none";
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106 end
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107 for _, child in ipairs(item) do
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108 if child.name == "group" then
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109 local text = t_concat(child);
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110 if text and text ~= "" then
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111 r_item.groups[text] = true;
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112 end
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113 end
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114 end
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115 local success, err_type, err_cond, err_msg = rm_add_to_roster(session, jid, r_item);
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116 if success then
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117 session.send(st.reply(stanza));
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118 rm_roster_push(from_node, from_host, jid);
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119 else
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120 session.send(st.error_reply(stanza, err_type, err_cond, err_msg));
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121 end
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122 end
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123 else
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124 session.send(st.error_reply(stanza, "cancel", "not-allowed"));
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125 end
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126 else
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127 session.send(st.error_reply(stanza, "modify", "bad-request")); -- FIXME what's the correct error?
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128 end
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129 else
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130 session.send(st.error_reply(stanza, "modify", "bad-request"));
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131 end
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132 return true;
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133 end
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134 end
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135 end);