prosody
a554bf5057a0
util/xmlrpc.lua

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util/xmlrpc.lua @ 874:a554bf5057a0

Added util/xmlrpc.lua - functions for converting between XML-RPC stanzas and Lua objects
author Waqas Hussain <waqas20@gmail.com>
date Wed, 04 Mar 2009 22:10:27 +0500
child 888:1059230969c3
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rev   line source
874
a554bf5057a0 Added util/xmlrpc.lua - functions for converting between XML-RPC stanzas and Lua objects
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1 -- Prosody IM v0.3
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2 -- Copyright (C) 2008-2009 Matthew Wild
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3 -- Copyright (C) 2008-2009 Waqas Hussain
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4 --
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9
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10 local pairs = pairs;
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11 local type = type;
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12 local error = error;
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13 local t_concat = table.concat;
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14 local t_insert = table.insert;
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15 local tostring = tostring;
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16 local tonumber = tonumber;
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17 local st = require "util.stanza";
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18
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19 module "xmlrpc"
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20
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21 local _lua_to_xmlrpc;
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22 local map = {
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23 table=function(stanza, object)
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24 stanza:tag("struct");
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25 for name, value in pairs(object) do
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26 stanza:tag("member");
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27 stanza:tag("name"):text(tostring(name)):up();
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28 stanza:tag("value");
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29 _lua_to_xmlrpc(stanza, value);
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30 stanza:up();
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31 stanza:up();
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32 end
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33 stanza:up();
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34 end;
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35 boolean=function(stanza, object)
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36 stanza:tag("boolean"):text(object and "1" or "0"):up();
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37 end;
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38 string=function(stanza, object)
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39 stanza:tag("string"):text(object):up();
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40 end;
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41 number=function(stanza, object)
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42 stanza:tag("int"):text(tostring(object)):up();
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43 end;
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44 };
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45 _lua_to_xmlrpc = function(stanza, object)
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46 local h = map[type(object)];
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47 if h then
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48 h(stanza, object);
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49 else
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50 error("Type not supported by XML-RPC: " .. type(object));
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51 end
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52 end
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53 function create_response(object)
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54 local stanza = st.stanza("methodResponse"):tag("params"):tag("param"):tag("value");
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55 _lua_to_xmlrpc(stanza, object);
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56 stanza:up():up():up();
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57 return stanza;
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58 end
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59 function create_error_response(faultCode, faultString)
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60 local stanza = st.stanza("methodResponse"):tag("fault"):tag("value");
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61 _lua_to_xmlrpc(stanza, {faultCode=faultCode, faultString=faultString});
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62 stanza:up():up();
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63 return stanza;
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64 end
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65
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66
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67 local _xmlrpc_to_lua;
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68 local int_parse = function(stanza)
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69 if #stanza.tags ~= 0 or #stanza == 0 then error("<"..stanza.name.."> must have a single text child"); end
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70 local n = tonumber(t_concat(stanza));
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71 if n then return n; end
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72 error("Failed to parse content of <"..stanza.name..">");
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73 end
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74 local rmap = {
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75 methodCall=function(stanza)
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76 if #stanza.tags ~= 2 then error("<methodCall> must have exactly two subtags"); end -- FIXME <params> is optional
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77 if stanza.tags[1].name ~= "methodName" then error("First <methodCall> child tag must be <methodName>") end
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78 if stanza.tags[2].name ~= "params" then error("Second <methodCall> child tag must be <params>") end
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79 return _xmlrpc_to_lua(stanza.tags[1]), _xmlrpc_to_lua(stanza.tags[2]);
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80 end;
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81 methodName=function(stanza)
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82 if #stanza.tags ~= 0 then error("<methodName> must not have any subtags"); end
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83 if #stanza == 0 then error("<methodName> must have text content"); end
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84 return t_concat(stanza);
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85 end;
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86 params=function(stanza)
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87 local t = {};
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88 for _, child in pairs(stanza.tags) do
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89 if child.name ~= "param" then error("<params> can only have <param> children"); end;
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90 t_insert(t, _xmlrpc_to_lua(child));
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91 end
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92 return t;
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93 end;
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94 param=function(stanza)
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95 if not(#stanza.tags == 1 and stanza.tags[1].name == "value") then error("<param> must have exactly one <value> child"); end
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96 return _xmlrpc_to_lua(stanza.tags[1]);
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97 end;
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98 value=function(stanza)
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99 if #stanza.tags == 0 then return t_concat(stanza); end
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100 if #stanza.tags ~= 1 then error("<value> must have a single child"); end
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101 return _xmlrpc_to_lua(stanza.tags[1]);
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102 end;
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103 int=int_parse;
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104 i4=int_parse;
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105 double=int_parse;
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106 boolean=function(stanza)
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107 if #stanza.tags ~= 0 or #stanza == 0 then error("<boolean> must have a single text child"); end
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108 local b = t_concat(stanza);
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109 if b ~= "1" and b ~= "0" then error("Failed to parse content of <boolean>"); end
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110 return b == "1" and true or false;
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111 end;
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112 string=function(stanza)
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113 if #stanza.tags ~= 0 then error("<string> must have a single text child"); end
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114 return t_concat(stanza);
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115 end;
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116 array=function(stanza)
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117 if #stanza.tags ~= 1 then error("<array> must have a single <data> child"); end
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118 return _xmlrpc_to_lua(stanza.tags[1]);
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119 end;
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120 data=function(stanza)
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121 local t = {};
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122 for _,child in pairs(stanza.tags) do
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123 if child.name ~= "value" then error("<data> can only have <value> children"); end
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124 t_insert(t, _xmlrpc_to_lua(child));
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125 end
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126 return t;
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127 end;
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128 struct=function(stanza)
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129 local t = {};
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130 for _,child in pairs(stanza.tags) do
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131 if child.name ~= "member" then error("<struct> can only have <member> children"); end
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132 local name, value = _xmlrpc_to_lua(child);
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133 t[name] = value;
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134 end
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135 return t;
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136 end;
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137 member=function(stanza)
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138 if #stanza.tags ~= 2 then error("<member> must have exactly two subtags"); end -- FIXME <params> is optional
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139 if stanza.tags[1].name ~= "name" then error("First <member> child tag must be <name>") end
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140 if stanza.tags[2].name ~= "value" then error("Second <member> child tag must be <value>") end
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141 return _xmlrpc_to_lua(stanza.tags[1]), _xmlrpc_to_lua(stanza.tags[2]);
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142 end;
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143 name=function(stanza)
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144 if #stanza.tags ~= 0 then error("<name> must have a single text child"); end
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145 local n = t_concat(stanza)
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146 if tostring(tonumber(n)) == n then n = tonumber(n); end
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147 return n;
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148 end;
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149 }
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150 _xmlrpc_to_lua = function(stanza)
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151 local h = rmap[stanza.name];
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152 if h then
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153 return h(stanza);
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154 else
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155 error("Unknown element: "..stanza.name);
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156 end
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157 end
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158 function translate_request(stanza)
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159 if stanza.name ~= "methodCall" then error("XML-RPC requests must have <methodCall> as root element"); end
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160 return _xmlrpc_to_lua(stanza);
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161 end
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162
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163 return _M;