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doc/net.server.lua

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doc/net.server.lua @ 8719:0cb84aafeee6

util.startup: Initialize logging earlier, so that messages from eg net.server are shown
author Kim Alvefur <zash@zash.se>
date Thu, 05 Apr 2018 17:41:00 +0200
parent 8532:17c754b81234
child 8728:41c959c5c84b
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8532
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1 -- Prosody IM
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2 -- Copyright (C) 2014,2016 Daurnimator
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3 --
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4 -- This project is MIT/X11 licensed. Please see the
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5 -- COPYING file in the source package for more information.
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6
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7 --[[
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8 This file is a template for writing a net.server compatible backend.
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9 ]]
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10
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11 --[[
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12 Read patterns (also called modes) can be one of:
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13 - "*a": Read as much as possible
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14 - "*l": Read until end of line
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16
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17 --- Handle API
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18 local handle_mt = {};
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19 local handle_methods = {};
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20 handle_mt.__index = handle_methods;
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21
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22 function handle_methods:set_mode(new_pattern)
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23 end
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24
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25 function handle_methods:setlistener(listeners)
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26 end
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27
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28 function handle_methods:setoption(option, value)
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29 end
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30
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31 function handle_methods:ip()
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32 end
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33
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34 function handle_methods:starttls(sslctx)
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35 end
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36
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37 function handle_methods:write(data)
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38 end
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39
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40 function handle_methods:close()
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41 end
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42
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43 function handle_methods:pause()
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44 end
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45
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46 function handle_methods:resume()
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47 end
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48
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49 --[[
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50 Returns
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51 - socket: the socket object underlying this handle
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52 ]]
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53 function handle_methods:socket()
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54 end
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55
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56 --[[
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57 Returns
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58 - boolean: if an ssl context has been set on this handle
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59 ]]
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60 function handle_methods:ssl()
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61 end
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62
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63
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64 --- Listeners API
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65 local listeners = {}
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66
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67 --[[ connect
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68 Called when a client socket has established a connection with it's peer
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70 function listeners.onconnect(handle)
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71 end
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72
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73 --[[ incoming
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74 Called when data is received
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75 If reading data failed this will be called with `nil, "error message"`
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77 function listeners.onincoming(handle, buff, err)
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78 end
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79
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80 --[[ status
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81 Known statuses:
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82 - "ssl-handshake-complete"
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83 ]]
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84 function listeners.onstatus(handle, status)
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85 end
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86
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87 --[[ disconnect
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88 Called when the peer has closed the connection
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89 ]]
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90 function listeners.ondisconnect(handle)
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91 end
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92
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93 --[[ drain
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94 Called when the handle's write buffer is empty
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95 ]]
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96 function listeners.ondrain(handle)
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97 end
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98
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99 --[[ readtimeout
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100 Called when a socket inactivity timeout occurs
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101 ]]
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102 function listeners.onreadtimeout(handle)
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103 end
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104
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105 --[[ detach: Called when other listeners are going to be removed
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106 Allows for clean-up
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107 ]]
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108 function listeners.ondetach(handle)
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109 end
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110
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111 --- Top level functions
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112
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113 --[[ Returns the syscall level event mechanism in use.
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114
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115 Returns:
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116 - backend: e.g. "select", "epoll"
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117 ]]
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118 local function get_backend()
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119 end
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120
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121 --[[ Starts the event loop.
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122
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123 Returns:
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124 - "quitting"
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125 ]]
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126 local function loop()
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127 end
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128
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129 --[[ Stop a running loop()
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130 ]]
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131 local function setquitting(quit)
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132 end
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133
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134
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135 --[[ Links to two handles together, so anything written to one is piped to the other
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136
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137 Arguments:
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138 - sender, reciever: handles to link
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139 - buffersize: maximum #bytes until sender will be locked
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140 ]]
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141 local function link(sender, receiver, buffersize)
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142 end
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143
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144 --[[ Binds and listens on the given address and port
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145 If `sslctx` is given, the connecting clients will have to negotiate an SSL session
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146
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147 Arguments:
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148 - address: address to bind to, may be "*" to bind all addresses. will be resolved if it is a string.
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149 - port: port to bind (as number)
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150 - listeners: a table of listeners
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151 - pattern: the read pattern
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152 - sslctx: is a valid luasec constructor
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153
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154 Returns:
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155 - handle
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156 - nil, "an error message": on failure (e.g. out of file descriptors)
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157 ]]
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158 local function addserver(address, port, listeners, pattern, sslctx)
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159 end
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160
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161 --[[ Wraps a lua-socket socket client socket in a handle.
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162 The socket must be already connected to the remote end.
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163 If `sslctx` is given, a SSL session will be negotiated before listeners are called.
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164
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165 Arguments:
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166 - socket: the lua-socket object to wrap
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167 - ip: returned by `handle:ip()`
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168 - port:
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169 - listeners: a table of listeners
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170 - pattern: the read pattern
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171 - sslctx: is a valid luasec constructor
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172 - typ: the socket type, one of:
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173 - "tcp"
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174 - "tcp6"
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175 - "udp"
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176
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177 Returns:
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178 - handle, socket
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179 - nil, "an error message": on failure (e.g. )
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181 local function wrapclient(socket, ip, serverport, listeners, pattern, sslctx)
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182 end
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183
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184 --[[ Connects to the given address and port
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185 If `sslctx` is given, a SSL session will be negotiated before listeners are called.
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186
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187 Arguments:
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188 - address: address to connect to. will be resolved if it is a string.
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189 - port: port to connect to (as number)
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190 - listeners: a table of listeners
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191 - pattern: the read pattern
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192 - sslctx: is a valid luasec constructor
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193 - typ: the socket type, one of:
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194 - "tcp"
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195 - "tcp6"
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196 - "udp"
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197
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198 Returns:
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199 - handle
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200 - nil, "an error message": on failure (e.g. out of file descriptors)
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201 ]]
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202 local function addclient(address, port, listeners, pattern, sslctx, typ)
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203 end
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204
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205 --[[ Close all handles
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206 ]]
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207 local function closeall()
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208 end
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209
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210 --[[ The callback should be called after `delay` seconds.
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211 The callback should be called with the time at the point of firing.
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212 If the callback returns a number, it should be called again after that many seconds.
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213
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214 Arguments:
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215 - delay: number of seconds to wait
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216 - callback: function to call.
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218 local function add_task(delay, callback)
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219 end
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220
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221 --[[ Adds a handler for when a signal is fired.
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222 Optional to implement
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223 callback does not take any arguments
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224
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225 Arguments:
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226 - signal_id: the signal id (as number) to listen for
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227 - handler: callback
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228 ]]
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229 local function hook_signal(signal_id, handler)
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230 end
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231
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232
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233 return {
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234 get_backend = get_backend;
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235 loop = loop;
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236 setquitting = setquitting;
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237 link = link;
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238 addserver = addserver;
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239 wrapclient = wrapclient;
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240 addclient = addclient;
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241 closeall = closeall;
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242 hook_signal = hook_signal;
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243 }