Mercurial > prosody-modules
annotate mod_web_push/mod_web_push.lua @ 3750:9002c8a2165f
mod_http_muc_log: Refactor calendarization of date list into a template filter BC
This breaks any custom templates using the calendar data structure.
author | Kim Alvefur <zash@zash.se> |
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date | Sun, 17 Nov 2019 15:16:23 +0100 |
parents | 2cee9fcb318b |
children |
rev | line source |
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3612
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1 -- XEP-XXXX: Web Push (aka: My mobile OS vendor won't let me have persistent TCP connections, take two) |
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2 -- Copyright (C) 2019 Maxime “pep” Buquet |
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3 -- |
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4 -- Heavily based on mod_cloud_notify. |
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5 -- Copyright (C) 2015-2016 Kim Alvefur |
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6 -- Copyright (C) 2017-2018 Thilo Molitor |
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7 |
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8 |
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9 local st = require"util.stanza"; |
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10 local dataform = require "util.dataforms"; |
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11 local http = require "net.http"; |
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12 |
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13 local os_time = os.time; |
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14 local next = next; |
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15 local jid = require"util.jid"; |
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16 local filters = require"util.filters"; |
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17 |
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18 local xmlns_webpush = "urn:xmpp:webpush:0"; |
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19 |
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20 local max_push_devices = module:get_option_number("push_max_devices", 5); |
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21 local dummy_body = module:get_option_string("push_notification_important_body", "New Message!"); |
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22 |
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23 local host_sessions = prosody.hosts[module.host].sessions; |
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24 |
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25 -- TODO: Generate it at setup time. Obviously not to be used other than for |
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26 -- testing purposes, or at all. |
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27 -- ECDH keypair |
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28 local server_pubkey = "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEhxZpb8yIVc/2hNesGLGAxEakyYy0MqEetjgL7BIOm8ybhVKxapKqNXjXJ+NOO5/b0Z0UuBg/HynGnf0xKKNhBQ=="; |
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29 local server_privkey = "MHcCAQEEIPhZac9pQ8aVTx9a5JyRcqfk3nuQQUFy3PaDcSWleojzoAoGCCqGSM49AwEHoUQDQgAEhxZpb8yIVc/2hNesGLGAxEakyYy0MqEetjgL7BIOm8ybhVKxapKqNXjXJ+NOO5/b0Z0UuBg/HynGnf0xKKNhBQ=="; |
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30 |
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31 -- Advertize disco feature |
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32 local function account_disco_info(event) |
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33 local form = dataform.new { |
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34 { name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/webpush#public-key" }; |
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35 { name = "webpush#public-key", value = server_pubkey }; |
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36 }; |
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37 (event.reply or event.stanza):tag("feature", {var=xmlns_webpush}):up() |
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38 :add_child(form:form({}, "result")); |
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39 end |
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40 module:hook("account-disco-info", account_disco_info); |
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41 |
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42 -- ordered table iterator, allow to iterate on the natural order of the keys of a table, |
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43 -- see http://lua-users.org/wiki/SortedIteration |
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44 local function __genOrderedIndex( t ) |
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45 local orderedIndex = {} |
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46 for key in pairs(t) do |
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47 table.insert( orderedIndex, key ) |
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48 end |
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49 -- sort in reverse order (newest one first) |
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50 table.sort( orderedIndex, function(a, b) |
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51 if a == nil or t[a] == nil or b == nil or t[b] == nil then return false end |
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52 -- only one timestamp given, this is the newer one |
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53 if t[a].timestamp ~= nil and t[b].timestamp == nil then return true end |
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54 if t[a].timestamp == nil and t[b].timestamp ~= nil then return false end |
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55 -- both timestamps given, sort normally |
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56 if t[a].timestamp ~= nil and t[b].timestamp ~= nil then return t[a].timestamp > t[b].timestamp end |
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57 return false -- normally not reached |
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58 end) |
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59 return orderedIndex |
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60 end |
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61 local function orderedNext(t, state) |
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62 -- Equivalent of the next function, but returns the keys in timestamp |
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63 -- order. We use a temporary ordered key table that is stored in the |
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64 -- table being iterated. |
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65 |
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66 local key = nil |
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67 --print("orderedNext: state = "..tostring(state) ) |
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68 if state == nil then |
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69 -- the first time, generate the index |
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70 t.__orderedIndex = __genOrderedIndex( t ) |
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71 key = t.__orderedIndex[1] |
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72 else |
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73 -- fetch the next value |
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74 for i = 1, #t.__orderedIndex do |
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75 if t.__orderedIndex[i] == state then |
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76 key = t.__orderedIndex[i+1] |
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77 end |
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78 end |
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79 end |
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80 |
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81 if key then |
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82 return key, t[key] |
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83 end |
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84 |
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85 -- no more value to return, cleanup |
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86 t.__orderedIndex = nil |
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87 return |
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88 end |
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89 local function orderedPairs(t) |
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90 -- Equivalent of the pairs() function on tables. Allows to iterate |
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91 -- in order |
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92 return orderedNext, t, nil |
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93 end |
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94 |
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95 -- small helper function to return new table with only "maximum" elements containing only the newest entries |
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96 local function reduce_table(table, maximum) |
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97 local count = 0; |
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98 local result = {}; |
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99 for key, value in orderedPairs(table) do |
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100 count = count + 1; |
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101 if count > maximum then break end |
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102 result[key] = value; |
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103 end |
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104 return result; |
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105 end |
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106 |
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107 local push_store = (function() |
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108 local store = module:open_store(); |
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109 local push_services = {}; |
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110 local api = {}; |
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111 function api:get(user) |
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112 if not push_services[user] then |
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113 local err; |
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114 push_services[user], err = store:get(user); |
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115 if not push_services[user] and err then |
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116 module:log("warn", "Error reading web push notification storage for user '%s': %s", user, tostring(err)); |
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117 push_services[user] = {}; |
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118 return push_services[user], false; |
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119 end |
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120 end |
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121 if not push_services[user] then push_services[user] = {} end |
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122 return push_services[user], true; |
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123 end |
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124 function api:set(user, data) |
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125 push_services[user] = reduce_table(data, max_push_devices); |
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126 local ok, err = store:set(user, push_services[user]); |
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127 if not ok then |
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128 module:log("error", "Error writing web push notification storage for user '%s': %s", user, tostring(err)); |
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129 return false; |
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130 end |
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131 return true; |
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132 end |
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133 function api:set_identifier(user, push_identifier, data) |
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134 local services = self:get(user); |
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135 services[push_identifier] = data; |
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136 return self:set(user, services); |
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137 end |
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138 return api; |
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139 end)(); |
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140 |
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141 local function push_enable(event) |
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142 local origin, stanza = event.origin, event.stanza; |
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143 local enable = stanza.tags[1]; |
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144 origin.log("debug", "Attempting to enable web push notifications"); |
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145 -- MUST contain a 'href' attribute of the XMPP Push Service being enabled |
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146 local push_endpoint = nil; |
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147 local push_auth = nil; |
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148 local push_p256dh = nil; |
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149 |
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150 local endpoint_tag = enable:get_child('endpoint'); |
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151 if endpoint_tag ~= nil then |
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152 push_endpoint = endpoint_tag:get_text(); |
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153 end |
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154 local auth_tag = enable:get_child('auth'); |
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155 if auth_tag ~= nil then |
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156 push_auth = auth_tag:get_text(); |
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157 end |
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158 local p256dh_tag = enable:get_child('p256dh'); |
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159 if p256dh_tag ~= nil then |
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160 push_p256dh = p256dh_tag:get_text(); |
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161 end |
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162 if not push_endpoint or not push_auth or not push_p256dh then |
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163 origin.log("debug", "Web Push notification enable request missing 'endpoint', 'auth', or 'p256dh' tags"); |
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164 origin.send(st.error_reply(stanza, "modify", "bad-request", "Missing enable child tag")); |
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165 return true; |
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166 end |
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167 local push_identifier = "foo"; |
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168 local push_service = push_endpoint; |
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169 local ok = push_store:set_identifier(origin.username, push_identifier, push_service); |
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170 if not ok then |
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171 origin.send(st.error_reply(stanza, "wait", "internal-server-error")); |
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172 else |
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173 origin.push_identifier = push_identifier; |
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174 origin.push_settings = push_service; |
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175 origin.log("info", "Web Push notifications enabled for %s (%s)", tostring(stanza.attr.from), tostring(origin.push_identifier)); |
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176 origin.send(st.reply(stanza)); |
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177 end |
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178 return true; |
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179 end |
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180 module:hook("iq-set/self/"..xmlns_webpush..":enable", push_enable); |
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181 |
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182 -- module:hook("iq-set/self/"..xmlns_webpush..":disable", push_disable); |
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183 |
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184 -- small helper function to extract relevant push settings |
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185 local function get_push_settings(stanza, session) |
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186 local to = stanza.attr.to; |
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187 local node = to and jid.split(to) or session.username; |
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188 local user_push_services = push_store:get(node); |
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189 return node, user_push_services; |
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190 end |
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191 |
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192 local function log_http_req(response_body, response_code, response) |
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193 module:log("debug", "FOO: response_body: %s; response_code: %s; response: %s", response_body, tostring(response_code), tostring(response)); |
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194 end |
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195 |
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196 local function handle_notify_request(stanza, node, user_push_services, log_push_decline) |
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197 local pushes = 0; |
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198 if not user_push_services or next(user_push_services) == nil then return pushes end |
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199 |
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200 for push_identifier, push_info in pairs(user_push_services) do |
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201 local send_push = true; -- only send push to this node when not already done for this stanza or if no stanza is given at all |
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202 if stanza then |
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203 if not stanza._push_notify then stanza._push_notify = {}; end |
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204 if stanza._push_notify[push_identifier] then |
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205 if log_push_decline then |
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206 module:log("debug", "Already sent push notification for %s@%s to %s", node, module.host, tostring(push_info)); |
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207 end |
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208 send_push = false; |
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209 end |
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210 stanza._push_notify[push_identifier] = true; |
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211 end |
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212 |
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213 if send_push then |
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214 local headers = { TTL = "60" }; |
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215 http.request(push_info, { method = "POST", headers = headers }, log_http_req); |
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216 pushes = pushes + 1; |
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217 end |
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218 end |
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219 return pushes; |
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220 end |
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221 |
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222 -- publish on offline message |
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223 module:hook("message/offline/handle", function(event) |
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224 local node, user_push_services = get_push_settings(event.stanza, event.origin); |
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225 module:log("debug", "Invoking web push handle_notify_request() for offline stanza"); |
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226 handle_notify_request(event.stanza, node, user_push_services, true); |
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227 end, 1); |
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228 |
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229 -- is this push a high priority one (this is needed for ios apps not using voip pushes) |
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230 local function is_important(stanza) |
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231 local st_name = stanza and stanza.name or nil; |
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232 if not st_name then return false; end -- nonzas are never important here |
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233 if st_name == "presence" then |
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234 return false; -- same for presences |
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235 elseif st_name == "message" then |
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236 -- unpack carbon copies |
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237 local stanza_direction = "in"; |
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238 local carbon; |
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239 local st_type; |
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240 -- support carbon copied message stanzas having an arbitrary message-namespace or no message-namespace at all |
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241 if not carbon then carbon = find(stanza, "{urn:xmpp:carbons:2}/forwarded/message"); end |
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242 if not carbon then carbon = find(stanza, "{urn:xmpp:carbons:1}/forwarded/message"); end |
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243 stanza_direction = carbon and stanza:child_with_name("sent") and "out" or "in"; |
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244 if carbon then stanza = carbon; end |
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245 st_type = stanza.attr.type; |
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246 |
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247 -- headline message are always not important |
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248 if st_type == "headline" then return false; end |
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249 |
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250 -- carbon copied outgoing messages are not important |
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251 if carbon and stanza_direction == "out" then return false; end |
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252 |
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253 -- We can't check for body contents in encrypted messages, so let's treat them as important |
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254 -- Some clients don't even set a body or an empty body for encrypted messages |
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255 |
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256 -- check omemo https://xmpp.org/extensions/inbox/omemo.html |
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257 if stanza:get_child("encrypted", "eu.siacs.conversations.axolotl") or stanza:get_child("encrypted", "urn:xmpp:omemo:0") then return true; end |
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258 |
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259 -- check xep27 pgp https://xmpp.org/extensions/xep-0027.html |
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260 if stanza:get_child("x", "jabber:x:encrypted") then return true; end |
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261 |
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262 -- check xep373 pgp (OX) https://xmpp.org/extensions/xep-0373.html |
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263 if stanza:get_child("openpgp", "urn:xmpp:openpgp:0") then return true; end |
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264 |
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265 local body = stanza:get_child_text("body"); |
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266 if st_type == "groupchat" and stanza:get_child_text("subject") then return false; end -- groupchat subjects are not important here |
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267 return body ~= nil and body ~= ""; -- empty bodies are not important |
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268 end |
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269 return false; -- this stanza wasn't one of the above cases --> it is not important, too |
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270 end |
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271 |
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272 -- publish on unacked smacks message |
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273 local function process_smacks_stanza(stanza, session) |
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274 if session.push_identifier then |
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275 session.log("debug", "Invoking web push handle_notify_request() for smacks queued stanza"); |
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276 local user_push_services = {[session.push_identifier] = session.push_settings}; |
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277 local node = get_push_settings(stanza, session); |
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278 if handle_notify_request(stanza, node, user_push_services, true) ~= 0 then |
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279 if session.hibernating and not session.first_hibernated_push then |
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280 -- if important stanzas are treated differently (pushed with last-message-body field set to dummy string) |
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281 -- and the message was important (e.g. had a last-message-body field) OR if we treat all pushes equally, |
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282 -- then record the time of first push in the session for the smack module which will extend its hibernation |
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283 -- timeout based on the value of session.first_hibernated_push |
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284 if not dummy_body or (dummy_body and is_important(stanza)) then |
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285 session.first_hibernated_push = os_time(); |
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286 end |
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287 end |
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288 end |
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289 end |
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290 return stanza; |
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291 end |
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292 |
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293 local function process_smacks_queue(queue, session) |
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294 if not session.push_identifier then return; end |
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295 local user_push_services = {[session.push_identifier] = session.push_settings}; |
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296 local notified = { unimportant = false; important = false } |
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297 for i=1, #queue do |
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298 local stanza = queue[i]; |
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299 local node = get_push_settings(stanza, session); |
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300 local stanza_type = "unimportant" |
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301 if dummy_body and is_important(stanza) then stanza_type = "important"; end |
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302 if not notified[stanza_type] then -- only notify if we didn't try to push for this stanza type already |
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303 -- session.log("debug", "Invoking cloud handle_notify_request() for smacks queued stanza: %d", i); |
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304 if handle_notify_request(stanza, node, user_push_services, false) ~= 0 then |
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305 if session.hibernating and not session.first_hibernated_push then |
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306 -- if important stanzas are treated differently (pushed with last-message-body field set to dummy string) |
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307 -- and the message was important (e.g. had a last-message-body field) OR if we treat all pushes equally, |
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308 -- then record the time of first push in the session for the smack module which will extend its hibernation |
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309 -- timeout based on the value of session.first_hibernated_push |
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310 if not dummy_body or (dummy_body and is_important(stanza)) then |
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311 session.first_hibernated_push = os_time(); |
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312 end |
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313 end |
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314 session.log("debug", "Web Push handle_notify_request() > 0, not notifying for other queued stanzas of type %s", stanza_type); |
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315 notified[stanza_type] = true |
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316 end |
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317 end |
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318 end |
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319 end |
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320 |
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321 -- smacks hibernation is started |
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322 local function hibernate_session(event) |
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323 local session = event.origin; |
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324 local queue = event.queue; |
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325 session.first_hibernated_push = nil; |
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326 -- process unacked stanzas |
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327 process_smacks_queue(queue, session); |
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328 -- process future unacked (hibernated) stanzas |
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329 filters.add_filter(session, "stanzas/out", process_smacks_stanza, -990); |
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330 end |
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331 |
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332 -- smacks hibernation is ended |
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333 local function restore_session(event) |
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334 local session = event.resumed; |
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335 if session then -- older smacks module versions send only the "intermediate" session in event.session and no session.resumed one |
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336 filters.remove_filter(session, "stanzas/out", process_smacks_stanza); |
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337 session.first_hibernated_push = nil; |
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338 end |
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339 end |
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340 |
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341 -- smacks ack is delayed |
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342 local function ack_delayed(event) |
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343 local session = event.origin; |
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344 local queue = event.queue; |
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345 -- process unacked stanzas (handle_notify_request() will only send push requests for new stanzas) |
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346 process_smacks_queue(queue, session); |
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347 end |
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348 |
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349 -- archive message added |
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350 local function archive_message_added(event) |
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351 -- event is: { origin = origin, stanza = stanza, for_user = store_user, id = id } |
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352 -- only notify for new mam messages when at least one device is online |
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353 if not event.for_user or not host_sessions[event.for_user] then return; end |
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354 local stanza = event.stanza; |
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355 local user_session = host_sessions[event.for_user].sessions; |
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356 local to = stanza.attr.to; |
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357 to = to and jid.split(to) or event.origin.username; |
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358 |
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359 -- only notify if the stanza destination is the mam user we store it for |
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360 if event.for_user == to then |
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361 local user_push_services = push_store:get(to); |
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362 if next(user_push_services) == nil then return end |
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363 |
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364 -- only notify nodes with no active sessions (smacks is counted as active and handled separate) |
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365 local notify_push_services = {}; |
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366 for identifier, push_info in pairs(user_push_services) do |
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367 local identifier_found = nil; |
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368 for _, session in pairs(user_session) do |
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369 -- module:log("debug", "searching for '%s': identifier '%s' for session %s", tostring(identifier), tostring(session.push_identifier), tostring(session.full_jid)); |
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370 if session.push_identifier == identifier then |
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371 identifier_found = session; |
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372 break; |
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373 end |
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374 end |
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375 if identifier_found then |
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376 identifier_found.log("debug", "Not web push notifying '%s' of new MAM stanza (session still alive)", identifier); |
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377 else |
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378 notify_push_services[identifier] = push_info; |
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379 end |
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380 end |
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381 |
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382 handle_notify_request(event.stanza, to, notify_push_services, true); |
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383 end |
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384 end |
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385 |
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386 module:hook("smacks-hibernation-start", hibernate_session); |
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387 module:hook("smacks-hibernation-end", restore_session); |
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388 module:hook("smacks-ack-delayed", ack_delayed); |
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389 module:hook("archive-message-added", archive_message_added); |
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390 |
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391 function module.command(arg) |
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Initial version of mod_web_push. WARNING: Do not use.
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392 print("TODO: Generate server keypair") |
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393 end |
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|
394 |
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395 module:log("info", "Module loaded"); |
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|
396 function module.unload() |
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397 if module.unhook then |
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Initial version of mod_web_push. WARNING: Do not use.
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398 module:unhook("account-disco-info", account_disco_info); |
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Initial version of mod_web_push. WARNING: Do not use.
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399 module:unhook("iq-set/self/"..xmlns_webpush..":enable", push_enable); |
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400 -- module:unhook("iq-set/self/"..xmlns_webpush..":disable", push_disable); |
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parents:
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|
401 end |
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|
402 |
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|
403 module:log("info", "Module unloaded"); |
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|
404 end |