Mercurial > prosody-modules

annotate mod_external_services/mod_external_services.lua @ 4980:da151f9af861

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replaced 'session' with 'origin' in push_disable session is not defined in this function, trying to access it leads to an error. The correct reference seems to be 'origin'. (This may have come about by copying from the similar code in process_stanza_queue.)
author arcseconds
date Sat, 30 Jul 2022 21:07:47 +1200
parents ede9682c2022
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1
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2 local dt = require "util.datetime";
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3 local base64 = require "util.encodings".base64;
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4 local hashes = require "util.hashes";
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5 local st = require "util.stanza";
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6 local jid = require "util.jid";
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7 local array = require "util.array";
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8 local set = require "util.set";
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9
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10 local default_host = module:get_option_string("external_service_host", module.host);
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11 local default_port = module:get_option_number("external_service_port");
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12 local default_secret = module:get_option_string("external_service_secret");
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13 local default_ttl = module:get_option_number("external_service_ttl", 86400);
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14
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15 local configured_services = module:get_option_array("external_services", {});
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16
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17 local access = module:get_option_set("external_service_access", {});
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18
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19 -- https://tools.ietf.org/html/draft-uberti-behave-turn-rest-00
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20 local function behave_turn_rest_credentials(srv, item, secret)
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21 local ttl = default_ttl;
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22 if type(item.ttl) == "number" then
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23 ttl = item.ttl;
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24 end
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25 local expires = srv.expires or os.time() + ttl;
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26 local username;
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27 if type(item.username) == "string" then
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28 username = string.format("%d:%s", expires, item.username);
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29 else
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30 username = string.format("%d", expires);
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31 end
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32 srv.username = username;
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33 srv.password = base64.encode(hashes.hmac_sha1(secret, srv.username));
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34 end
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35
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36 local algorithms = {
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37 turn = behave_turn_rest_credentials;
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38 }
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39
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40 -- filter config into well-defined service records
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41 local function prepare(item)
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42 if type(item) ~= "table" then
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43 module:log("error", "Service definition is not a table: %q", item);
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44 return nil;
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45 end
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46
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47 local srv = {
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48 type = nil;
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49 transport = nil;
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50 host = default_host;
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51 port = default_port;
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52 username = nil;
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53 password = nil;
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54 restricted = nil;
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55 expires = nil;
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56 };
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57
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58 if type(item.type) == "string" then
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59 srv.type = item.type;
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60 else
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61 module:log("error", "Service missing mandatory 'type' field: %q", item);
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62 return nil;
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63 end
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64 if type(item.transport) == "string" then
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65 srv.transport = item.transport;
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66 end
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67 if type(item.host) == "string" then
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68 srv.host = item.host;
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69 end
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70 if type(item.port) == "number" then
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71 srv.port = item.port;
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72 end
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73 if type(item.username) == "string" then
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74 srv.username = item.username;
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75 end
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76 if type(item.password) == "string" then
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77 srv.password = item.password;
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78 srv.restricted = true;
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79 end
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80 if item.restricted == true then
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81 srv.restricted = true;
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82 end
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83 if type(item.expires) == "number" then
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84 srv.expires = item.expires;
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85 elseif type(item.ttl) == "number" then
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86 srv.expires = os.time() + item.ttl;
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87 end
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88 if (item.secret == true and default_secret) or type(item.secret) == "string" then
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89 local secret_cb = item.credentials_cb or algorithms[item.algorithm] or algorithms[srv.type];
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90 local secret = item.secret;
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91 if secret == true then
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92 secret = default_secret;
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93 end
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94 if secret_cb then
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95 secret_cb(srv, item, secret);
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96 srv.restricted = true;
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97 end
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98 end
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99 return srv;
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100 end
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101
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102 function module.load()
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103 -- Trigger errors on startup
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104 local services = configured_services / prepare;
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105 if #services == 0 then
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106 module:log("warn", "No services configured or all had errors");
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107 end
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108 end
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109
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110 -- Ensure only valid items are added in events
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111 local services_mt = {
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112 __index = getmetatable(array()).__index;
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113 __newindex = function (self, i, v)
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114 rawset(self, i, assert(prepare(v), "Invalid service entry added"));
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115 end;
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116 }
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117
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118 function get_services()
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119 local extras = module:get_host_items("external_service");
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120 local services = ( configured_services + extras ) / prepare;
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121
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122 setmetatable(services, services_mt);
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123
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124 return services;
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125 end
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126
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127 function services_xml(services, name, namespace)
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128 local reply = st.stanza(name or "services", { xmlns = namespace or "urn:xmpp:extdisco:2" });
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129
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130 for _, srv in ipairs(services) do
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131 reply:tag("service", {
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132 type = srv.type;
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133 transport = srv.transport;
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134 host = srv.host;
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135 port = srv.port and string.format("%d", srv.port) or nil;
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136 username = srv.username;
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137 password = srv.password;
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138 expires = srv.expires and dt.datetime(srv.expires) or nil;
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139 restricted = srv.restricted and "1" or nil;
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Kim Alvefur <zash@zash.se>
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140 }):up();
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Kim Alvefur <zash@zash.se>
parents:
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141 end
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142
4668
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143 return reply;
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Kim Alvefur <zash@zash.se>
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144 end
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Kim Alvefur <zash@zash.se>
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145
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146 local function handle_services(event)
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147 local origin, stanza = event.origin, event.stanza;
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148 local action = stanza.tags[1];
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149
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Kim Alvefur <zash@zash.se>
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150 local user_bare = jid.bare(stanza.attr.from);
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151 local user_host = jid.host(user_bare);
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152 if not ((access:empty() and origin.type == "c2s") or access:contains(user_bare) or access:contains(user_host)) then
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diff changeset
153 origin.send(st.error_reply(stanza, "auth", "forbidden"));
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154 return true;
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Kim Alvefur <zash@zash.se>
parents: 4667
diff changeset
155 end
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parents: 4667
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156
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157 local services = get_services();
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158
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159 local requested_type = action.attr.type;
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160 if requested_type then
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161 services:filter(function(item)
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162 return item.type == requested_type;
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Kim Alvefur <zash@zash.se>
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163 end);
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164 end
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165
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166 module:fire_event("external_service/services", {
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167 origin = origin;
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168 stanza = stanza;
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169 requested_type = requested_type;
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170 services = services;
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Kim Alvefur <zash@zash.se>
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171 });
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172
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173 local reply = st.reply(stanza):add_child(services_xml(services, action.name, action.attr.xmlns));
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174
4075
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175 origin.send(reply);
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176 return true;
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Kim Alvefur <zash@zash.se>
parents:
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177 end
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parents:
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178
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Kim Alvefur <zash@zash.se>
parents:
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179 local function handle_credentials(event)
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Kim Alvefur <zash@zash.se>
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180 local origin, stanza = event.origin, event.stanza;
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181 local action = stanza.tags[1];
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
182
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Kim Alvefur <zash@zash.se>
parents:
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183 if origin.type ~= "c2s" then
4665
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Kim Alvefur <zash@zash.se>
parents: 4075
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184 origin.send(st.error_reply(stanza, "auth", "forbidden", "The 'port' and 'type' attributes are required."));
4075
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Kim Alvefur <zash@zash.se>
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185 return true;
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Kim Alvefur <zash@zash.se>
parents:
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186 end
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parents:
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187
4667
1990611691cf mod_external_services: Factor out public function returning current services
Kim Alvefur <zash@zash.se>
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188 local services = get_services();
4075
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Kim Alvefur <zash@zash.se>
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189 services:filter(function (item)
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Kim Alvefur <zash@zash.se>
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190 return item.restricted;
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Kim Alvefur <zash@zash.se>
parents:
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191 end)
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Kim Alvefur <zash@zash.se>
parents:
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192
4666
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193 local requested_credentials = set.new();
4075
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
Kim Alvefur <zash@zash.se>
parents:
diff changeset
194 for service in action:childtags("service") do
4665
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diff changeset
195 if not service.attr.type or not service.attr.host then
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Kim Alvefur <zash@zash.se>
parents: 4075
diff changeset
196 origin.send(st.error_reply(stanza, "modify", "bad-request"));
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197 return true;
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Kim Alvefur <zash@zash.se>
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198 end
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Kim Alvefur <zash@zash.se>
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diff changeset
199
4666
dbc7ba3cc27c mod_external_services: Filter services by requested credentials using a Set
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diff changeset
200 requested_credentials:add(string.format("%s:%s:%d", service.attr.type, service.attr.host,
dbc7ba3cc27c mod_external_services: Filter services by requested credentials using a Set
Kim Alvefur <zash@zash.se>
parents: 4665
diff changeset
201 tonumber(service.attr.port) or 0));
4075
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
Kim Alvefur <zash@zash.se>
parents:
diff changeset
202 end
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
203
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
Kim Alvefur <zash@zash.se>
parents:
diff changeset
204 module:fire_event("external_service/credentials", {
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
Kim Alvefur <zash@zash.se>
parents:
diff changeset
205 origin = origin;
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
Kim Alvefur <zash@zash.se>
parents:
diff changeset
206 stanza = stanza;
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
207 requested_credentials = requested_credentials;
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
208 services = services;
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
209 });
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
210
4666
dbc7ba3cc27c mod_external_services: Filter services by requested credentials using a Set
Kim Alvefur <zash@zash.se>
parents: 4665
diff changeset
211 services:filter(function (srv)
dbc7ba3cc27c mod_external_services: Filter services by requested credentials using a Set
Kim Alvefur <zash@zash.se>
parents: 4665
diff changeset
212 local port_key = string.format("%s:%s:%d", srv.type, srv.host, srv.port or 0);
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Kim Alvefur <zash@zash.se>
parents: 4665
diff changeset
213 local portless_key = string.format("%s:%s:%d", srv.type, srv.host, 0);
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Kim Alvefur <zash@zash.se>
parents: 4665
diff changeset
214 return requested_credentials:contains(port_key) or requested_credentials:contains(portless_key);
dbc7ba3cc27c mod_external_services: Filter services by requested credentials using a Set
Kim Alvefur <zash@zash.se>
parents: 4665
diff changeset
215 end);
dbc7ba3cc27c mod_external_services: Filter services by requested credentials using a Set
Kim Alvefur <zash@zash.se>
parents: 4665
diff changeset
216
4668
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Kim Alvefur <zash@zash.se>
parents: 4667
diff changeset
217 local reply = st.reply(stanza):add_child(services_xml(services, action.name, action.attr.xmlns));
4075
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
Kim Alvefur <zash@zash.se>
parents:
diff changeset
218
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
Kim Alvefur <zash@zash.se>
parents:
diff changeset
219 origin.send(reply);
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
Kim Alvefur <zash@zash.se>
parents:
diff changeset
220 return true;
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
Kim Alvefur <zash@zash.se>
parents:
diff changeset
221 end
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
Kim Alvefur <zash@zash.se>
parents:
diff changeset
222
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
Kim Alvefur <zash@zash.se>
parents:
diff changeset
223 -- XEP-0215 v0.7
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
Kim Alvefur <zash@zash.se>
parents:
diff changeset
224 module:add_feature("urn:xmpp:extdisco:2");
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
Kim Alvefur <zash@zash.se>
parents:
diff changeset
225 module:hook("iq-get/host/urn:xmpp:extdisco:2:services", handle_services);
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
Kim Alvefur <zash@zash.se>
parents:
diff changeset
226 module:hook("iq-get/host/urn:xmpp:extdisco:2:credentials", handle_credentials);
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
Kim Alvefur <zash@zash.se>
parents:
diff changeset
227
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
Kim Alvefur <zash@zash.se>
parents:
diff changeset
228 -- COMPAT XEP-0215 v0.6
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
Kim Alvefur <zash@zash.se>
parents:
diff changeset
229 -- Those still on the old version gets to deal with undefined attributes until they upgrade.
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
Kim Alvefur <zash@zash.se>
parents:
diff changeset
230 module:add_feature("urn:xmpp:extdisco:1");
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
Kim Alvefur <zash@zash.se>
parents:
diff changeset
231 module:hook("iq-get/host/urn:xmpp:extdisco:1:services", handle_services);
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
Kim Alvefur <zash@zash.se>
parents:
diff changeset
232 module:hook("iq-get/host/urn:xmpp:extdisco:1:credentials", handle_credentials);