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annotate mod_blocking/mod_blocking.lua @ 750:8133dd5f266a

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mod_readonly: Allow preventing direct modification of certain user data via XMPP
author Matthew Wild <mwild1@gmail.com>
date Fri, 27 Jul 2012 02:38:43 +0100
parents 000f1d1c6ca5
children 80ede103d7a3
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1 local jid_split = require "util.jid".split;
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2 local st = require "util.stanza";
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3
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4 local xmlns_blocking = "urn:xmpp:blocking";
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5
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6 module:add_feature("urn:xmpp:blocking");
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7
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8 -- Add JID to default privacy list
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9 function add_blocked_jid(username, host, jid)
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10 local privacy_lists = datamanager.load(username, host, "privacy") or {lists = {}};
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11 local default_list_name = privacy_lists.default;
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12 if not default_list_name then
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13 default_list_name = "blocklist";
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14 privacy_lists.default = default_list_name;
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15 end
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16 local default_list = privacy_lists.lists[default_list_name];
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17 if not default_list then
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18 default_list = { name = default_list_name, items = {} };
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19 privacy_lists.lists[default_list_name] = default_list;
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20 end
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21 local items = default_list.items;
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22 local order = items[1] and items[1].order or 0; -- Must come first
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23 for i=1,#items do -- order must be unique
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24 local item = items[i];
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25 item.order = item.order + 1;
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26 if item.type == "jid" and item.action == "deny" and item.value == jid then
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27 return false;
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28 end
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29 end
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30 table.insert(items, 1, { type = "jid"
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31 , action = "deny"
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32 , value = jid
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33 , message = false
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34 , ["presence-out"] = false
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35 , ["presence-in"] = false
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36 , iq = false
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37 , order = order
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38 });
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39 datamanager.store(username, host, "privacy", privacy_lists);
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40 return true;
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41 end
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43 -- Remove JID from default privacy list
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44 function remove_blocked_jid(username, host, jid)
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45 local privacy_lists = datamanager.load(username, host, "privacy") or {};
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46 local default_list_name = privacy_lists.default;
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47 if not default_list_name then return; end
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48 local default_list = privacy_lists.lists[default_list_name];
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49 if not default_list then return; end
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50 local items = default_list.items;
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51 local item, removed = nil, false;
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52 for i=1,#items do -- order must be unique
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53 item = items[i];
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54 if item.type == "jid" and item.action == "deny" and item.value == jid then
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55 table.remove(items, i);
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56 removed = true;
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57 break;
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58 end
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59 end
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60 if removed then
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61 datamanager.store(username, host, "privacy", privacy_lists);
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62 end
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63 return removed;
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64 end
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65
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66 function remove_all_blocked_jids(username, host)
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67 local privacy_lists = datamanager.load(username, host, "privacy") or {};
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68 local default_list_name = privacy_lists.default;
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69 if not default_list_name then return; end
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70 local default_list = privacy_lists.lists[default_list_name];
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71 if not default_list then return; end
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72 local items = default_list.items;
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73 local item;
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74 for i=#items,1,-1 do -- order must be unique
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75 item = items[i];
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76 if item.type == "jid" and item.action == "deny" then
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77 table.remove(items, i);
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78 end
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79 end
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80 datamanager.store(username, host, "privacy", privacy_lists);
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81 return true;
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82 end
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83
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84 function get_blocked_jids(username, host)
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85 -- Return array of blocked JIDs in default privacy list
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86 local privacy_lists = datamanager.load(username, host, "privacy") or {};
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87 local default_list_name = privacy_lists.default;
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88 if not default_list_name then return {}; end
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89 local default_list = privacy_lists.lists[default_list_name];
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90 if not default_list then return {}; end
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91 local items = default_list.items;
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92 local item;
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93 local jid_list = {};
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94 for i=1,#items do -- order must be unique
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95 item = items[i];
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96 if item.type == "jid" and item.action == "deny" then
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97 jid_list[#jid_list+1] = item.value;
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98 end
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99 end
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100 return jid_list;
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101 end
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102
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103 function handle_blocking_command(event)
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104 local session, stanza = event.origin, event.stanza;
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105
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106 local username, host = jid_split(stanza.attr.from);
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107 if stanza.attr.type == "set" then
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108 if stanza.tags[1].name == "block" then
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109 local block = stanza.tags[1];
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110 local block_jid_list = {};
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111 for item in block:childtags() do
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112 block_jid_list[#block_jid_list+1] = item.attr.jid;
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113 end
164
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114 if #block_jid_list == 0 then
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115 session.send(st.error_reply(stanza, "modify", "bad-request"));
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116 else
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117 for _, jid in ipairs(block_jid_list) do
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118 add_blocked_jid(username, host, jid);
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119 end
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120 session.send(st.reply(stanza));
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121 end
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122 return true;
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123 elseif stanza.tags[1].name == "unblock" then
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124 remove_all_blocked_jids(username, host);
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125 session.send(st.reply(stanza));
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126 return true;
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127 end
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128 elseif stanza.attr.type == "get" and stanza.tags[1].name == "blocklist" then
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129 local reply = st.reply(stanza):tag("blocklist", { xmlns = xmlns_blocking });
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130 local blocked_jids = get_blocked_jids(username, host);
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131 for _, jid in ipairs(blocked_jids) do
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132 reply:tag("item", { jid = jid }):up();
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133 end
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134 session.send(reply);
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135 return true;
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136 end
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137 end
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138
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139 module:hook("iq/self/urn:xmpp:blocking:blocklist", handle_blocking_command);
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140 module:hook("iq/self/urn:xmpp:blocking:block", handle_blocking_command);
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141 module:hook("iq/self/urn:xmpp:blocking:unblock", handle_blocking_command);