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plugins/mod_mam/mod_mam.lua @ 7838:e5d5e5946af5
mod_mam: Use is_stanza from util.stanza
author | Kim Alvefur <zash@zash.se> |
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date | Mon, 28 Nov 2016 07:35:49 +0100 |
parent | 7837:a17bddf62a28 |
child | 7839:f3e1925f29c2 |
rev | line source |
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1 -- XEP-0313: Message Archive Management for Prosody |
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2 -- Copyright (C) 2011-2016 Kim Alvefur |
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3 -- |
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4 -- This file is MIT/X11 licensed. |
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5 |
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6 local xmlns_mam = "urn:xmpp:mam:0"; |
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7 local xmlns_delay = "urn:xmpp:delay"; |
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8 local xmlns_forward = "urn:xmpp:forward:0"; |
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9 |
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10 local um = require "core.usermanager"; |
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11 local st = require "util.stanza"; |
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12 local rsm = require "rsm"; |
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13 local get_prefs = module:require"mamprefs".get; |
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14 local set_prefs = module:require"mamprefs".set; |
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15 local prefs_to_stanza = module:require"mamprefsxml".tostanza; |
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16 local prefs_from_stanza = module:require"mamprefsxml".fromstanza; |
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17 local jid_bare = require "util.jid".bare; |
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18 local jid_split = require "util.jid".split; |
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19 local dataform = require "util.dataforms".new; |
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20 local host = module.host; |
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21 |
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22 local rm_load_roster = require "core.rostermanager".load_roster; |
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23 |
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24 local is_stanza = st.is_stanza; |
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25 local tostring = tostring; |
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26 local time_now = os.time; |
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27 local m_min = math.min; |
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28 local timestamp, timestamp_parse = require "util.datetime".datetime, require "util.datetime".parse; |
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29 local default_max_items, max_max_items = 20, module:get_option_number("max_archive_query_results", 50); |
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30 local global_default_policy = module:get_option("default_archive_policy", true); |
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31 if global_default_policy ~= "roster" then |
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32 global_default_policy = module:get_option_boolean("default_archive_policy", global_default_policy); |
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33 end |
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34 |
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35 local archive_store = "archive2"; |
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36 local archive = assert(module:open_store(archive_store, "archive")); |
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37 |
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38 if archive.name == "null" or not archive.find then |
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39 if not archive.find then |
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40 module:log("debug", "Attempt to open archive storage returned a valid driver but it does not seem to implement the storage API"); |
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41 module:log("debug", "mod_%s does not support archiving", archive._provided_by or archive.name and "storage_"..archive.name.."(?)" or "<unknown>"); |
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42 else |
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43 module:log("debug", "Attempt to open archive storage returned null driver"); |
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44 end |
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45 module:log("debug", "See https://prosody.im/doc/storage and https://prosody.im/doc/archiving for more information"); |
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46 module:log("info", "Using in-memory fallback archive driver"); |
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47 archive = module:require "fallback_archive"; |
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48 end |
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49 |
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50 local cleanup; |
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51 |
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52 -- Handle prefs. |
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53 module:hook("iq/self/"..xmlns_mam..":prefs", function(event) |
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54 local origin, stanza = event.origin, event.stanza; |
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55 local user = origin.username; |
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56 if stanza.attr.type == "get" then |
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57 local prefs = prefs_to_stanza(get_prefs(user)); |
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58 local reply = st.reply(stanza):add_child(prefs); |
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59 origin.send(reply); |
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60 else -- type == "set" |
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61 local new_prefs = stanza:get_child("prefs", xmlns_mam); |
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62 local prefs = prefs_from_stanza(new_prefs); |
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63 local ok, err = set_prefs(user, prefs); |
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64 if not ok then |
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65 origin.send(st.error_reply(stanza, "cancel", "internal-server-error", "Error storing preferences: "..tostring(err))); |
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66 else |
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67 origin.send(st.reply(stanza)); |
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68 end |
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69 end |
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70 return true; |
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71 end); |
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72 |
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73 local query_form = dataform { |
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74 { name = "FORM_TYPE"; type = "hidden"; value = xmlns_mam; }; |
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75 { name = "with"; type = "jid-single"; }; |
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76 { name = "start"; type = "text-single" }; |
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77 { name = "end"; type = "text-single"; }; |
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78 }; |
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79 |
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80 -- Serve form |
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81 module:hook("iq-get/self/"..xmlns_mam..":query", function(event) |
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82 local origin, stanza = event.origin, event.stanza; |
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83 origin.send(st.reply(stanza):add_child(query_form:form())); |
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84 return true; |
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85 end); |
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86 |
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87 -- Handle archive queries |
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88 module:hook("iq-set/self/"..xmlns_mam..":query", function(event) |
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89 local origin, stanza = event.origin, event.stanza; |
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90 local query = stanza.tags[1]; |
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91 local qid = query.attr.queryid; |
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92 |
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93 if cleanup then cleanup[origin.username] = true; end |
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94 |
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95 -- Search query parameters |
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96 local qwith, qstart, qend; |
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97 local form = query:get_child("x", "jabber:x:data"); |
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98 if form then |
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99 local err; |
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100 form, err = query_form:data(form); |
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101 if err then |
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102 origin.send(st.error_reply(stanza, "modify", "bad-request", select(2, next(err)))); |
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103 return true; |
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104 end |
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105 qwith, qstart, qend = form["with"], form["start"], form["end"]; |
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106 qwith = qwith and jid_bare(qwith); -- dataforms does jidprep |
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107 end |
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108 |
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109 if qstart or qend then -- Validate timestamps |
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110 local vstart, vend = (qstart and timestamp_parse(qstart)), (qend and timestamp_parse(qend)); |
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111 if (qstart and not vstart) or (qend and not vend) then |
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112 origin.send(st.error_reply(stanza, "modify", "bad-request", "Invalid timestamp")) |
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113 return true; |
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114 end |
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115 qstart, qend = vstart, vend; |
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116 end |
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117 |
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118 module:log("debug", "Archive query, id %s with %s from %s until %s)", |
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119 tostring(qid), qwith or "anyone", qstart or "the dawn of time", qend or "now"); |
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120 |
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121 -- RSM stuff |
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122 local qset = rsm.get(query); |
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123 local qmax = m_min(qset and qset.max or default_max_items, max_max_items); |
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124 local reverse = qset and qset.before or false; |
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125 local before, after = qset and qset.before, qset and qset.after; |
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126 if type(before) ~= "string" then before = nil; end |
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127 |
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128 |
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129 -- Load all the data! |
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130 local data, err = archive:find(origin.username, { |
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131 start = qstart; ["end"] = qend; -- Time range |
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132 with = qwith; |
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133 limit = qmax + 1; |
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134 before = before; after = after; |
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135 reverse = reverse; |
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136 total = true; |
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137 }); |
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138 |
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139 if not data then |
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140 origin.send(st.error_reply(stanza, "cancel", "internal-server-error", err)); |
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141 return true; |
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142 end |
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143 local total = tonumber(err); |
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144 |
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145 origin.send(st.reply(stanza)); |
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146 local msg_reply_attr = { to = stanza.attr.from, from = stanza.attr.to }; |
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147 |
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148 local results = {}; |
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149 |
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150 -- Wrap it in stuff and deliver |
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151 local first, last; |
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152 local count = 0; |
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153 local complete = "true"; |
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154 for id, item, when in data do |
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155 count = count + 1; |
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156 if count > qmax then |
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157 complete = nil; |
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158 break; |
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159 end |
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160 local fwd_st = st.message(msg_reply_attr) |
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161 :tag("result", { xmlns = xmlns_mam, queryid = qid, id = id }) |
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162 :tag("forwarded", { xmlns = xmlns_forward }) |
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163 :tag("delay", { xmlns = xmlns_delay, stamp = timestamp(when) }):up(); |
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164 |
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165 if not is_stanza(item) then |
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166 item = st.deserialize(item); |
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167 end |
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168 item.attr.xmlns = "jabber:client"; |
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169 fwd_st:add_child(item); |
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170 |
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171 if not first then first = id; end |
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172 last = id; |
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173 |
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174 if reverse then |
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175 results[count] = fwd_st; |
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176 else |
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177 origin.send(fwd_st); |
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178 end |
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179 end |
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180 |
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181 if reverse then |
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182 for i = #results, 1, -1 do |
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183 origin.send(results[i]); |
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184 end |
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185 first, last = last, first; |
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186 end |
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187 |
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188 -- That's all folks! |
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189 module:log("debug", "Archive query %s completed", tostring(qid)); |
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190 |
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191 origin.send(st.message(msg_reply_attr) |
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192 :tag("fin", { xmlns = xmlns_mam, queryid = qid, complete = complete }) |
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193 :add_child(rsm.generate { |
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194 first = first, last = last, count = total })); |
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195 return true; |
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196 end); |
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197 |
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198 local function has_in_roster(user, who) |
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199 local roster = rm_load_roster(user, host); |
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200 module:log("debug", "%s has %s in roster? %s", user, who, roster[who] and "yes" or "no"); |
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201 return roster[who]; |
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202 end |
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203 |
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204 local function shall_store(user, who) |
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205 -- TODO Cache this? |
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206 if not um.user_exists(user, host) then |
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207 return false; |
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208 end |
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209 local prefs = get_prefs(user); |
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210 local rule = prefs[who]; |
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211 module:log("debug", "%s's rule for %s is %s", user, who, tostring(rule)); |
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212 if rule ~= nil then |
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213 return rule; |
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214 end |
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215 -- Below could be done by a metatable |
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216 local default = prefs[false]; |
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217 module:log("debug", "%s's default rule is %s", user, tostring(default)); |
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218 if default == nil then |
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219 default = global_default_policy; |
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220 module:log("debug", "Using global default rule, %s", tostring(default)); |
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221 end |
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222 if default == "roster" then |
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223 return has_in_roster(user, who); |
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224 end |
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225 return default; |
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226 end |
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227 |
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228 -- Handle messages |
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229 local function message_handler(event, c2s) |
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230 local origin, stanza = event.origin, event.stanza; |
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231 local log = c2s and origin.log or module._log; |
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232 local orig_type = stanza.attr.type or "normal"; |
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233 local orig_from = stanza.attr.from; |
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234 local orig_to = stanza.attr.to or orig_from; |
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235 -- Stanza without 'to' are treated as if it was to their own bare jid |
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236 |
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237 -- We store chat messages or normal messages that have a body |
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238 if not(orig_type == "chat" or (orig_type == "normal" and stanza:get_child("body")) ) then |
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239 log("debug", "Not archiving stanza: %s (type)", stanza:top_tag()); |
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240 return; |
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241 end |
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242 -- or if hints suggest we shouldn't |
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243 if stanza:get_child("no-permanent-storage", "urn:xmpp:hints") -- The XEP needs to decide on "store" or "storage" |
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244 or stanza:get_child("no-permanent-store", "urn:xmpp:hints") |
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245 or stanza:get_child("no-storage", "urn:xmpp:hints") |
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246 or stanza:get_child("no-store", "urn:xmpp:hints") then |
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247 log("debug", "Not archiving stanza: %s (hint)", stanza:top_tag()); |
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248 return; |
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249 end |
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250 |
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251 -- Whos storage do we put it in? |
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252 local store_user = c2s and origin.username or jid_split(orig_to); |
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253 -- And who are they chatting with? |
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254 local with = jid_bare(c2s and orig_to or orig_from); |
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255 |
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256 -- Check with the users preferences |
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257 if shall_store(store_user, with) then |
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258 log("debug", "Archiving stanza: %s", stanza:top_tag()); |
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259 |
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260 -- And stash it |
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261 local ok, id = archive:append(store_user, nil, stanza, time_now(), with); |
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262 if ok then |
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263 if cleanup then cleanup[store_user] = true; end |
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264 module:fire_event("archive-message-added", { origin = origin, stanza = stanza, for_user = store_user, id = id }); |
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265 end |
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266 else |
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267 log("debug", "Not archiving stanza: %s (prefs)", stanza:top_tag()); |
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268 end |
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269 end |
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270 |
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271 local function c2s_message_handler(event) |
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272 return message_handler(event, true); |
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273 end |
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274 |
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275 local cleanup_after = module:get_option_string("archive_expires_after", "1w"); |
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276 local cleanup_interval = module:get_option_number("archive_cleanup_interval", 4 * 60 * 60); |
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277 if cleanup_after ~= "never" then |
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278 local day = 86400; |
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279 local multipliers = { d = day, w = day * 7, m = 31 * day, y = 365.2425 * day }; |
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280 local n, m = cleanup_after:lower():match("(%d+)%s*([dwmy]?)"); |
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281 if not n then |
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282 module:log("error", "Could not parse archive_expires_after string %q", cleanup_after); |
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283 return false; |
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284 end |
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285 |
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286 cleanup_after = tonumber(n) * ( multipliers[m] or 1 ); |
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287 |
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288 module:log("debug", "archive_expires_after = %d -- in seconds", cleanup_after); |
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289 |
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290 if not archive.delete then |
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291 module:log("error", "archive_expires_after set but mod_%s does not support deleting", archive._provided_by); |
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292 return false; |
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293 end |
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294 |
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295 cleanup = {}; |
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296 |
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297 pcall(function () |
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298 for user in um.users(module.host) do |
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299 cleanup[user] = true; |
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300 end |
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301 end); |
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302 |
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303 module:add_timer(math.random(10, 60), function() |
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304 local user = next(cleanup); |
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305 if user then |
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306 module:log("debug", "Removing old messages for user %q", user); |
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307 local ok, err = archive:delete(user, { ["end"] = os.time() - cleanup_after; }) |
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308 if not ok then |
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309 module:log("warn", "Could not expire archives for user %s: %s", user, err); |
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310 else |
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311 -- :affected() is a recent addition for eg SQLite3 in LuaDBI |
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312 pcall(function(stmt) |
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313 module:log("debug", "Removed %d messages", stmt:affected()); |
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314 end, err); |
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315 end |
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316 cleanup[user] = nil; |
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317 end |
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318 return math.random(cleanup_interval, cleanup_interval * 2); |
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319 end); |
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320 end |
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321 |
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322 -- Stanzas sent by local clients |
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323 module:hook("pre-message/bare", c2s_message_handler, 2); |
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324 module:hook("pre-message/full", c2s_message_handler, 2); |
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325 -- Stanszas to local clients |
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326 module:hook("message/bare", message_handler, 2); |
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327 module:hook("message/full", message_handler, 2); |
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328 |
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329 module:add_feature(xmlns_mam); -- COMPAT with XEP-0313 v 0.1 |
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330 |
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331 module:hook("account-disco-info", function(event) |
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332 (event.reply or event.stanza):tag("feature", {var=xmlns_mam}):up(); |
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333 end); |
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334 |