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annotate src/luan/modules/Rpc.luan @ 1204:5d0cbd908582

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remove Io socket support add SSL for Rpc
author Franklin Schmidt <fschmidt@gmail.com>
date Tue, 06 Mar 2018 19:48:15 -0700
parents 7f4a12fb7716
children 8f14426f8ada
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1 java()
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2 local Socket = require "java:java.net.Socket"
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3 local ServerSocket = require "java:java.net.ServerSocket"
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4 local SSLSocketFactory = require "java:javax.net.ssl.SSLSocketFactory"
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5 local SSLServerSocketFactory = require "java:javax.net.ssl.SSLServerSocketFactory"
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6 local RpcClient = require "java:luan.lib.rpc.RpcClient"
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7 local RpcServer = require "java:luan.lib.rpc.RpcServer"
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8 local RpcCall = require "java:luan.lib.rpc.RpcCall"
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9 local RpcResult = require "java:luan.lib.rpc.RpcResult"
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10 local RpcException = require "java:luan.lib.rpc.RpcException"
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11 local JavaRpc = require "java:luan.lib.rpc.Rpc"
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12 local JavaLuan = require "java:luan.Luan"
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13 local JavaUtils = require "java:luan.modules.Utils"
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14 local IoLuan = require "java:luan.modules.IoLuan"
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15 local ByteArrayInputStream = require "java:java.io.ByteArrayInputStream"
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16 local Luan = require "luan:Luan.luan"
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17 local error = Luan.error
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18 local set_metatable = Luan.set_metatable or error()
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19 local try = Luan.try or error()
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20 local ipairs = Luan.ipairs or error()
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21 local type = Luan.type or error()
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22 local Io = require "luan:Io.luan"
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23 local Thread = require "luan:Thread.luan"
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24 local Table = require "luan:Table.luan"
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25 local unpack = Table.unpack or error()
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26 local Logging = require "luan:logging/Logging.luan"
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27 local logger = Logging.logger "Rpc"
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29
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30 local Rpc = {}
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31
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32 Rpc.port = 9101
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33
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34 Rpc.cipher_suite = "SSL_DH_anon_WITH_RC4_128_MD5"
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35
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36 local function java_args(list)
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37 for i,v in ipairs(list) do
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38 list[i] = JavaLuan.toJava(v)
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39 end
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40 return unpack(list)
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41 end
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42
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43 local function luan_args(list,binary_in)
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44 list = JavaLuan.table(list)
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45 for i,v in ipairs(list) do
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46 list[i] = JavaLuan.toLuan(v)
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47 end
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48 if binary_in ~= nil then
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49 local i_in = list[#list]
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50 list[#list] = nil
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51 local type = list[i_in]
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52 if type == "binary" then
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53 list[i_in] = JavaUtils.readAll(binary_in)
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54 elseif type == "input" then
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55 list[i_in] = IoLuan.LuanInput.new(binary_in).table()
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56 else
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57 error(type)
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58 end
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59 end
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60 return unpack(list)
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61 end
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62
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63 local function encode_binary(args)
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64 local binary_in, len_in, i_in
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65 for i,v in ipairs(args) do
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66 if type(v) == "binary" then
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67 binary_in==nil or error "can't have multiple binary args"
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68 i_in = i
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69 binary_in = ByteArrayInputStream.new(v)
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70 len_in = #v
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71 args[i] = "binary"
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72 elseif type(v) == "table" and v.java ~= nil and v.java.instanceof(IoLuan.LuanFile) then
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73 binary_in==nil or error "can't have multiple binary args"
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74 i_in = i
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75 binary_in = v.java.inputStream()
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76 len_in = v.length()
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77 args[i] = "input"
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78 end
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79 end
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80 args[#args+1] = i_in
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81 return binary_in, len_in
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82 end
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83
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84 local function rpc_caller(socket)
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85 local client = RpcClient.new(socket)
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86 return function(fn_name,...)
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87 local args = {...}
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88 local binary_in, len_in = encode_binary(args)
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89 local call
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90 if binary_in == nil then
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91 call = RpcCall.new(fn_name,java_args(args))
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92 else
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93 call = RpcCall.new(binary_in,len_in,fn_name,java_args(args))
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94 end
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95 client.write(call)
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96 if fn_name == "close" then
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97 client.close()
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98 return
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99 end
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100 return try {
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101 function()
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102 local result = client.read()
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103 return luan_args(result.returnValues,result["in"])
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104 end
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105 catch = function(e)
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106 local cause = e.java.getCause()
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107 if cause ~= nil and cause.instanceof(RpcException) and cause.getMessage() == "luan" then
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108 error(cause.values.get(0))
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109 else
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110 e.throw()
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111 end
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112 end
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113 }
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114 end_function
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115 end_function
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116
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117 Rpc.functions = {}
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118
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119 local function rpc_responder(socket,fns)
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120 local server = RpcServer.new(socket)
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121 local responder = {}
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122 function responder.is_closed()
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123 return server.isClosed()
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124 end_function
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125 function responder.respond()
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126 local call = server.read()
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127 if call==nil then return end
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128 local cmd = call.cmd
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129 if cmd == "close" then
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130 server.close()
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131 return
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132 end_if
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133 local fn = fns[cmd]
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134 if fn == nil then
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135 server.write(JavaRpc.COMMAND_NOT_FOUND)
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136 return
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137 end_if
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138 local rtn = try {
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139 function()
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140 return {fn(luan_args(call.args,call["in"]))}
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141 end
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142 catch = function(e)
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143 logger.warn(e)
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144 local ex = RpcException.new("luan",e.get_message())
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145 server.write(ex)
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146 return nil
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147 end
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148 }
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149 if rtn==nil then return end
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150 local binary_in, len_in = encode_binary(rtn)
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151 local result
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152 if binary_in == nil then
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153 result = RpcResult.new(java_args(rtn))
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154 else
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155 result = RpcResult.new(binary_in,len_in,java_args(rtn))
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156 end
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157 server.write(result)
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158 end
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159 return responder
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160 end_function
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161
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162 function Rpc.remote(domain)
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163 local socket
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164 if Rpc.cipher_suite == nil then
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165 socket = Socket.new(domain,Rpc.port)
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166 else
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167 socket = SSLSocketFactory.getDefault().createSocket(domain,Rpc.port)
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168 socket.setEnabledCipherSuites{Rpc.cipher_suite}
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169 end
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170 local call = rpc_caller(socket)
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171 local mt = {}
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172 function mt.__index(_,key)
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173 return function(...)
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174 return call(key,...)
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175 end
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176 end
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177 local t = {}
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178 set_metatable(t,mt)
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179 return t
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180 end_function
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181
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182 function Rpc.serve(port,fns)
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183 port = port or Rpc.port
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184 fns = fns or Rpc.functions
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185 local socket_server
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186 if Rpc.cipher_suite == nil then
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187 socket_server = ServerSocket.new(port)
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188 else
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189 socket_server = SSLServerSocketFactory.getDefault().createServerSocket(port)
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190 socket_server.setEnabledCipherSuites{Rpc.cipher_suite}
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191 end
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192 while true do
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193 try {
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194 function()
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195 local socket = socket_server.accept()
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196 local function server()
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197 try {
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198 function()
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199 local responder = rpc_responder(socket,fns)
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200 while not responder.is_closed() do
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201 responder.respond()
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202 end
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203 end
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204 catch = function(e)
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205 logger.error(e)
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206 end
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207 }
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208 end
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209 Thread.fork(server)
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210 end
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211 catch = function(e)
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212 logger.error(e)
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213 end
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214 }
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215 end_while
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216 end_function
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217
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218 return Rpc