Mercurial > prosody-modules
annotate mod_component_client/mod_component_client.lua @ 3461:b54e98d5c4a1
mod_cache_c2s_caps: Only advertise support for trunk until further notice. Fixes #1311.
author | Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> |
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date | Sun, 03 Feb 2019 21:36:31 +0100 |
parents | 3e00cd4a02bc |
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1 --[[ |
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2 |
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3 mod_component_client.lua |
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4 |
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5 This module turns Prosody hosts into components of other XMPP servers. |
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6 |
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7 Config: |
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8 |
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9 VirtualHost "component.example.com" |
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10 component_client = { |
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11 host = "localhost"; |
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12 port = 5347; |
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13 secret = "hunter2"; |
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14 } |
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15 |
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16 |
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17 ]] |
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20 local socket = require "socket" |
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21 |
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22 local logger = require "util.logger"; |
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23 local sha1 = require "util.hashes".sha1; |
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24 local st = require "util.stanza"; |
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25 |
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26 local jid_split = require "util.jid".split; |
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27 local new_xmpp_stream = require "util.xmppstream".new; |
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28 local uuid_gen = require "util.uuid".generate; |
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29 |
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30 local core_process_stanza = prosody.core_process_stanza; |
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31 local hosts = prosody.hosts; |
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32 |
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33 local log = module._log; |
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34 |
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35 local config = module:get_option("component_client", {}); |
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36 local server_host = config.host or "localhost"; |
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37 local server_port = config.port or 5347; |
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38 local server_secret = config.secret or error("client_component.secret not provided"); |
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39 local exit_on_disconnect = config.exit_on_disconnect; |
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40 local keepalive_interval = config.keepalive_interval or 3600; |
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41 |
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42 local __conn; |
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43 |
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44 local listener = {}; |
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45 local session; |
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46 |
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47 local xmlns_component = 'jabber:component:accept'; |
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48 local stream_callbacks = { default_ns = xmlns_component }; |
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49 |
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50 local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams"; |
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51 |
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52 function stream_callbacks.error(session, error, data, data2) |
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53 if session.destroyed then return; end |
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54 module:log("warn", "Error processing component stream: %s", tostring(error)); |
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55 if error == "no-stream" then |
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56 session:close("invalid-namespace"); |
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57 elseif error == "parse-error" then |
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58 session.log("warn", "External component %s XML parse error: %s", tostring(session.host), tostring(data)); |
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59 session:close("not-well-formed"); |
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60 elseif error == "stream-error" then |
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61 local condition, text = "undefined-condition"; |
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62 for child in data:children() do |
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63 if child.attr.xmlns == xmlns_xmpp_streams then |
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64 if child.name ~= "text" then |
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65 condition = child.name; |
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66 else |
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67 text = child:get_text(); |
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68 end |
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69 if condition ~= "undefined-condition" and text then |
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70 break; |
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71 end |
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72 end |
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73 end |
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74 text = condition .. (text and (" ("..text..")") or ""); |
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75 session.log("info", "Session closed by remote with error: %s", text); |
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76 session:close(nil, text); |
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77 end |
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78 end |
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79 |
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80 function stream_callbacks.streamopened(session, attr) |
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81 -- TODO check id~=nil, from==module.host |
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82 module:log("debug", "Sending handshake"); |
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83 local handshake = st.stanza("handshake"):text(sha1(attr.id..server_secret, true)); |
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84 session.send(handshake); |
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85 session.notopen = nil; |
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86 end |
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87 |
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88 function stream_callbacks.streamclosed(session) |
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89 session.log("debug", "Received </stream:stream>"); |
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90 session:close(); |
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91 end |
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92 |
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93 module:hook("stanza/jabber:component:accept:handshake", function(event) |
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94 session.type = "component"; |
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95 module:log("debug", "Handshake complete"); |
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96 module:fire_event("component_client/connected", {}); |
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97 return true; -- READY! |
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98 end); |
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99 |
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100 module:hook("route/remote", function(event) |
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101 return session and session.send(event.stanza); |
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102 end); |
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103 |
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104 function stream_callbacks.handlestanza(session, stanza) |
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105 -- Namespaces are icky. |
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106 if not stanza.attr.xmlns and stanza.name == "handshake" then |
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107 stanza.attr.xmlns = xmlns_component; |
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108 end |
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109 if not stanza.attr.xmlns or stanza.attr.xmlns == "jabber:client" then |
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110 if not stanza.attr.from then |
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111 session.log("warn", "Rejecting stanza with no 'from' address"); |
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112 session.send(st.error_reply(stanza, "modify", "bad-request", "Components MUST get a 'from' address on stanzas")); |
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113 return; |
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114 end |
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115 local _, domain = jid_split(stanza.attr.to); |
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116 if not domain then |
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117 session.log("warn", "Rejecting stanza with no 'to' address"); |
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118 session.send(st.error_reply(stanza, "modify", "bad-request", "Components MUST get a 'to' address on stanzas")); |
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119 return; |
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120 elseif domain ~= session.host then |
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121 session.log("warn", "Component received stanza with unknown 'to' address"); |
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122 session.send(st.error_reply(stanza, "cancel", "not-allowed", "Component doesn't serve this JID")); |
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123 return; |
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124 end |
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125 end |
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126 return core_process_stanza(session, stanza); |
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127 end |
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128 |
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129 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'}; |
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130 local default_stream_attr = { ["xmlns:stream"] = "http://etherx.jabber.org/streams", xmlns = stream_callbacks.default_ns, version = "1.0", id = "" }; |
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131 local function session_close(session, reason) |
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132 if session.destroyed then return; end |
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133 if session.conn then |
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134 if session.notopen then |
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135 session.send("<?xml version='1.0'?>"); |
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136 session.send(st.stanza("stream:stream", default_stream_attr):top_tag()); |
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137 end |
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138 if reason then |
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139 if type(reason) == "string" then -- assume stream error |
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140 module:log("info", "Disconnecting component, <stream:error> is: %s", reason); |
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141 session.send(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' })); |
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142 elseif type(reason) == "table" then |
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143 if reason.condition then |
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144 local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up(); |
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145 if reason.text then |
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146 stanza:tag("text", stream_xmlns_attr):text(reason.text):up(); |
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147 end |
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148 if reason.extra then |
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149 stanza:add_child(reason.extra); |
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150 end |
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151 module:log("info", "Disconnecting component, <stream:error> is: %s", tostring(stanza)); |
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152 session.send(stanza); |
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153 elseif reason.name then -- a stanza |
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154 module:log("info", "Disconnecting component, <stream:error> is: %s", tostring(reason)); |
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155 session.send(reason); |
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156 end |
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157 end |
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158 end |
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159 session.send("</stream:stream>"); |
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160 session.conn:close(); |
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161 listener.ondisconnect(session.conn, "stream error"); |
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162 end |
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163 end |
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164 |
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165 function listener.onconnect(conn) |
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166 session = { type = "component_unauthed", conn = conn, send = function (data) return conn:write(tostring(data)); end, host = module.host }; |
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167 |
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168 -- Logging functions -- |
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169 local conn_name = "jcp"..tostring(session):match("[a-f0-9]+$"); |
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170 session.log = logger.init(conn_name); |
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171 session.close = session_close; |
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172 |
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173 session.log("info", "Outgoing Jabber component connection"); |
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174 |
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175 local stream = new_xmpp_stream(session, stream_callbacks); |
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176 session.stream = stream; |
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177 |
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178 function session.data(conn, data) |
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179 local ok, err = stream:feed(data); |
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180 if ok then return; end |
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181 module:log("debug", "Received invalid XML (%s) %d bytes: %s", tostring(err), #data, data:sub(1, 300):gsub("[\r\n]+", " "):gsub("[%z\1-\31]", "_")); |
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182 session:close("not-well-formed"); |
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183 end |
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184 |
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185 session.dispatch_stanza = stream_callbacks.handlestanza; |
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186 |
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187 session.notopen = true; |
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188 session.send(st.stanza("stream:stream", { |
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189 to = session.host; |
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190 ["xmlns:stream"] = 'http://etherx.jabber.org/streams'; |
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191 xmlns = xmlns_component; |
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192 }):top_tag()); |
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193 |
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194 --sessions[conn] = session; |
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195 end |
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196 function listener.onincoming(conn, data) |
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197 --local session = sessions[conn]; |
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198 session.data(conn, data); |
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199 end |
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200 function listener.ondisconnect(conn, err) |
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201 --local session = sessions[conn]; |
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202 if session then |
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203 (session.log or log)("info", "component disconnected: %s (%s)", tostring(session.host), tostring(err)); |
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204 if session.on_destroy then session:on_destroy(err); end |
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205 --sessions[conn] = nil; |
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206 for k in pairs(session) do |
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207 if k ~= "log" and k ~= "close" then |
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208 session[k] = nil; |
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209 end |
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210 end |
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211 session.destroyed = true; |
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212 session = nil; |
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213 end |
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214 __conn = nil; |
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215 module:log("error", "connection lost"); |
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216 module:fire_event("component_client/disconnected", { reason = err }); |
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217 if exit_on_disconnect and not prosody.shutdown_reason then |
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218 prosody.shutdown("Shutdown by component_client disconnect", 1); |
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219 end |
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220 end |
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221 |
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222 -- send whitespace keep-alive one an hour |
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223 if keepalive_interval ~= 0 then |
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224 module:add_timer(keepalive_interval, function() |
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225 if __conn then |
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226 __conn:write(" "); |
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227 end |
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228 return keepalive_interval; |
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229 end); |
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230 end |
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231 |
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232 function connect() |
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233 ------------------------ |
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234 -- Taken from net.http |
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235 local conn = socket.tcp ( ) |
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236 conn:settimeout ( 10 ) |
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237 local ok, err = conn:connect ( server_host , server_port ) |
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238 if not ok and err ~= "timeout" then |
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239 return nil, err; |
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240 end |
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241 |
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242 local handler , conn = server.wrapclient ( conn , server_host , server_port , listener , "*a") |
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243 __conn = handler; |
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244 ------------------------ |
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245 return true; |
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246 end |
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247 local s, err = connect(); |
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248 if not s then |
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249 listener.ondisconnect(nil, err); |
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250 end |
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251 |
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252 module:hook_global("server-stopping", function(event) |
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253 local reason = event.reason; |
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254 if session then |
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255 session:close{ condition = "system-shutdown", text = reason }; |
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256 end |
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257 end, 1000); |
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258 |