prosody-modules
460f78654864
mod_external_services/mod_external_services.lua

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mod_external_services/mod_external_services.lua @ 5173:460f78654864

mod_muc_rtbl: also filter messages This was a bit tricky because we don't want to run the JIDs through SHA256 on each message. Took a while to come up with this simple plan of just caching the SHA256 of the JIDs on the occupants. This will leave some dirt in the occupants after unloading the module, but that should be ok; once they cycle the room, the hashes will be gone. This is direly needed, otherwise, there is a tight race between the moderation activities and the actors joining the room.
author Jonas Schäfer <jonas@wielicki.name>
date Tue, 21 Feb 2023 21:37:27 +0100
parent 4668:ede9682c2022
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
4075
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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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diff changeset
135 port = srv.port and string.format("%d", srv.port) or nil;
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
136 username = srv.username;
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
137 password = srv.password;
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
138 expires = srv.expires and dt.datetime(srv.expires) or nil;
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diff changeset
139 restricted = srv.restricted and "1" or nil;
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
140 }):up();
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
141 end
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142
4668
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143 return reply;
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Kim Alvefur <zash@zash.se>
parents: 4667
diff changeset
144 end
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Kim Alvefur <zash@zash.se>
parents: 4667
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145
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Kim Alvefur <zash@zash.se>
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146 local function handle_services(event)
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Kim Alvefur <zash@zash.se>
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147 local origin, stanza = event.origin, event.stanza;
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Kim Alvefur <zash@zash.se>
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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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diff changeset
150 local user_bare = jid.bare(stanza.attr.from);
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Kim Alvefur <zash@zash.se>
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151 local user_host = jid.host(user_bare);
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parents: 4667
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152 if not ((access:empty() and origin.type == "c2s") or access:contains(user_bare) or access:contains(user_host)) then
ede9682c2022 mod_external_services: Factor out public function for converting to XML
Kim Alvefur <zash@zash.se>
parents: 4667
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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Kim Alvefur <zash@zash.se>
parents: 4667
diff changeset
156
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Kim Alvefur <zash@zash.se>
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diff changeset
157 local services = get_services();
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158
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Kim Alvefur <zash@zash.se>
parents: 4667
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159 local requested_type = action.attr.type;
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Kim Alvefur <zash@zash.se>
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diff changeset
160 if requested_type then
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Kim Alvefur <zash@zash.se>
parents: 4667
diff changeset
161 services:filter(function(item)
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Kim Alvefur <zash@zash.se>
parents: 4667
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162 return item.type == requested_type;
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Kim Alvefur <zash@zash.se>
parents: 4667
diff changeset
163 end);
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Kim Alvefur <zash@zash.se>
parents: 4667
diff changeset
164 end
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165
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Kim Alvefur <zash@zash.se>
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166 module:fire_event("external_service/services", {
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Kim Alvefur <zash@zash.se>
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167 origin = origin;
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Kim Alvefur <zash@zash.se>
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168 stanza = stanza;
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Kim Alvefur <zash@zash.se>
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169 requested_type = requested_type;
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Kim Alvefur <zash@zash.se>
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170 services = services;
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Kim Alvefur <zash@zash.se>
parents: 4667
diff changeset
171 });
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diff changeset
172
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Kim Alvefur <zash@zash.se>
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173 local reply = st.reply(stanza):add_child(services_xml(services, action.name, action.attr.xmlns));
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parents: 4667
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174
4075
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parents:
diff changeset
175 origin.send(reply);
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Kim Alvefur <zash@zash.se>
parents:
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176 return true;
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
177 end
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
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>
parents:
diff changeset
180 local origin, stanza = event.origin, event.stanza;
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
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:
diff changeset
183 if origin.type ~= "c2s" then
4665
f0ffa8cf3ce6 mod_external_services: Validate required attributes on credentials requests
Kim Alvefur <zash@zash.se>
parents: 4075
diff changeset
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>
parents:
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185 return true;
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
Kim Alvefur <zash@zash.se>
parents:
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186 end
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
187
4667
1990611691cf mod_external_services: Factor out public function returning current services
Kim Alvefur <zash@zash.se>
parents: 4666
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188 local services = get_services();
4075
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Kim Alvefur <zash@zash.se>
parents:
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189 services:filter(function (item)
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
190 return item.restricted;
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
191 end)
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
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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Kim Alvefur <zash@zash.se>
parents: 4075
diff changeset
195 if not service.attr.type or not service.attr.host then
f0ffa8cf3ce6 mod_external_services: Validate required attributes on credentials requests
Kim Alvefur <zash@zash.se>
parents: 4075
diff changeset
196 origin.send(st.error_reply(stanza, "modify", "bad-request"));
f0ffa8cf3ce6 mod_external_services: Validate required attributes on credentials requests
Kim Alvefur <zash@zash.se>
parents: 4075
diff changeset
197 return true;
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Kim Alvefur <zash@zash.se>
parents: 4075
diff changeset
198 end
f0ffa8cf3ce6 mod_external_services: Validate required attributes on credentials requests
Kim Alvefur <zash@zash.se>
parents: 4075
diff changeset
199
4666
dbc7ba3cc27c mod_external_services: Filter services by requested credentials using a Set
Kim Alvefur <zash@zash.se>
parents: 4665
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
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
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;
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
Kim Alvefur <zash@zash.se>
parents:
diff changeset
207 requested_credentials = requested_credentials;
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
Kim Alvefur <zash@zash.se>
parents:
diff changeset
208 services = services;
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
Kim Alvefur <zash@zash.se>
parents:
diff changeset
209 });
4841cf3fded5 mod_external_service: Include for users of older versions of Prosody
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);
dbc7ba3cc27c mod_external_services: Filter services by requested credentials using a Set
Kim Alvefur <zash@zash.se>
parents: 4665
diff changeset
213 local portless_key = string.format("%s:%s:%d", srv.type, srv.host, 0);
dbc7ba3cc27c mod_external_services: Filter services by requested credentials using a Set
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
ede9682c2022 mod_external_services: Factor out public function for converting to XML
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);