Mercurial > hg > orthanc
annotate Core/Lua/LuaContext.cpp @ 2836:7133ad478eea
fix Debian warnings
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 20 Sep 2018 16:17:46 +0200 |
parents | c8d369400ae1 |
children | d924f9bb61cc |
rev | line source |
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386 | 1 /** |
2 * Orthanc - A Lightweight, RESTful DICOM Store | |
1900 | 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics |
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4 * Department, University Hospital of Liege, Belgium |
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5 * Copyright (C) 2017-2018 Osimis S.A., Belgium |
386 | 6 * |
7 * This program is free software: you can redistribute it and/or | |
8 * modify it under the terms of the GNU General Public License as | |
9 * published by the Free Software Foundation, either version 3 of the | |
10 * License, or (at your option) any later version. | |
11 * | |
12 * In addition, as a special exception, the copyright holders of this | |
13 * program give permission to link the code of its release with the | |
14 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
15 * that use the same license as the "OpenSSL" library), and distribute | |
16 * the linked executables. You must obey the GNU General Public License | |
17 * in all respects for all of the code used other than "OpenSSL". If you | |
18 * modify file(s) with this exception, you may extend this exception to | |
19 * your version of the file(s), but you are not obligated to do so. If | |
20 * you do not wish to do so, delete this exception statement from your | |
21 * version. If you delete this exception statement from all source files | |
22 * in the program, then also delete it here. | |
23 * | |
24 * This program is distributed in the hope that it will be useful, but | |
25 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
27 * General Public License for more details. | |
28 * | |
29 * You should have received a copy of the GNU General Public License | |
30 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
31 **/ | |
32 | |
33 | |
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34 #include "../PrecompiledHeaders.h" |
386 | 35 #include "LuaContext.h" |
36 | |
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37 #include "../Logging.h" |
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38 #include "../OrthancException.h" |
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39 |
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40 #include <set> |
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41 #include <cassert> |
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42 #include <boost/lexical_cast.hpp> |
386 | 43 |
44 extern "C" | |
45 { | |
46 #include <lualib.h> | |
47 #include <lauxlib.h> | |
48 } | |
49 | |
50 namespace Orthanc | |
51 { | |
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52 static bool OnlyContainsDigits(const std::string& s) |
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53 { |
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54 for (size_t i = 0; i < s.size(); i++) |
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55 { |
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56 if (!isdigit(s[i])) |
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57 { |
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58 return false; |
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59 } |
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60 } |
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61 |
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62 return true; |
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63 } |
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64 |
1051 | 65 LuaContext& LuaContext::GetLuaContext(lua_State *state) |
386 | 66 { |
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67 const void* value = GetGlobalVariable(state, "_LuaContext"); |
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68 assert(value != NULL); |
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69 |
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70 return *const_cast<LuaContext*>(reinterpret_cast<const LuaContext*>(value)); |
1051 | 71 } |
72 | |
73 int LuaContext::PrintToLog(lua_State *state) | |
74 { | |
75 LuaContext& that = GetLuaContext(state); | |
76 | |
386 | 77 // http://medek.wordpress.com/2009/02/03/wrapping-lua-errors-and-print-function/ |
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78 int nArgs = lua_gettop(state); |
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79 lua_getglobal(state, "tostring"); |
386 | 80 |
81 // Make sure you start at 1 *NOT* 0 for arrays in Lua. | |
82 std::string result; | |
83 | |
84 for (int i = 1; i <= nArgs; i++) | |
85 { | |
86 const char *s; | |
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87 lua_pushvalue(state, -1); |
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88 lua_pushvalue(state, i); |
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89 lua_call(state, 1, 1); |
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90 s = lua_tostring(state, -1); |
386 | 91 |
92 if (result.size() > 0) | |
93 result.append(", "); | |
94 | |
95 if (s == NULL) | |
96 result.append("<No conversion to string>"); | |
97 else | |
98 result.append(s); | |
99 | |
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100 lua_pop(state, 1); |
386 | 101 } |
102 | |
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103 LOG(WARNING) << "Lua says: " << result; |
1051 | 104 that.log_.append(result); |
105 that.log_.append("\n"); | |
386 | 106 |
107 return 0; | |
108 } | |
109 | |
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110 |
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111 int LuaContext::ParseJson(lua_State *state) |
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112 { |
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113 LuaContext& that = GetLuaContext(state); |
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114 |
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115 int nArgs = lua_gettop(state); |
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116 if (nArgs != 1 || |
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117 !lua_isstring(state, 1)) // Password |
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118 { |
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119 lua_pushnil(state); |
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120 return 1; |
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121 } |
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122 |
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123 const char* str = lua_tostring(state, 1); |
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124 |
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125 Json::Value value; |
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126 Json::Reader reader; |
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127 if (reader.parse(str, str + strlen(str), value)) |
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128 { |
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129 that.PushJson(value); |
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130 } |
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131 else |
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132 { |
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133 lua_pushnil(state); |
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134 } |
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135 |
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136 return 1; |
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137 } |
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138 |
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139 |
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140 int LuaContext::DumpJson(lua_State *state) |
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141 { |
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142 LuaContext& that = GetLuaContext(state); |
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143 |
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144 int nArgs = lua_gettop(state); |
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145 if ((nArgs != 1 && nArgs != 2) || |
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146 (nArgs == 2 && !lua_isboolean(state, 2))) |
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147 { |
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148 lua_pushnil(state); |
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149 return 1; |
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150 } |
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151 |
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152 bool keepStrings = false; |
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153 if (nArgs == 2) |
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154 { |
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155 keepStrings = lua_toboolean(state, 2) ? true : false; |
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156 } |
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157 |
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158 Json::Value json; |
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159 that.GetJson(json, 1, keepStrings); |
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160 |
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161 Json::FastWriter writer; |
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162 std::string s = writer.write(json); |
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163 lua_pushlstring(state, s.c_str(), s.size()); |
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164 |
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165 return 1; |
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166 } |
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167 |
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168 |
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169 int LuaContext::SetHttpCredentials(lua_State *state) |
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170 { |
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171 LuaContext& that = GetLuaContext(state); |
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172 |
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173 // Check the types of the arguments |
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174 int nArgs = lua_gettop(state); |
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175 if (nArgs != 2 || |
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176 !lua_isstring(state, 1) || // Username |
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177 !lua_isstring(state, 2)) // Password |
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178 { |
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179 LOG(ERROR) << "Lua: Bad parameters to SetHttpCredentials()"; |
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180 } |
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181 else |
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182 { |
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183 // Configure the HTTP client |
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184 const char* username = lua_tostring(state, 1); |
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185 const char* password = lua_tostring(state, 2); |
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186 that.httpClient_.SetCredentials(username, password); |
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187 } |
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188 |
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189 return 0; |
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190 } |
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191 |
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192 |
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193 bool LuaContext::AnswerHttpQuery(lua_State* state) |
1051 | 194 { |
195 std::string str; | |
196 | |
197 try | |
198 { | |
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199 httpClient_.Apply(str); |
1051 | 200 } |
1545 | 201 catch (OrthancException&) |
1051 | 202 { |
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203 return false; |
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204 } |
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205 |
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206 // Return the result of the HTTP request |
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207 lua_pushlstring(state, str.c_str(), str.size()); |
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208 |
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209 return true; |
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210 } |
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211 |
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212 void LuaContext::SetHttpHeaders(lua_State *state, int top) |
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213 { |
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214 this->httpClient_.ClearHeaders(); // always reset headers in case they have been set in a previous request |
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215 |
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216 if (lua_gettop(state) >= top) |
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217 { |
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218 Json::Value headers; |
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219 this->GetJson(headers, top, true); |
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220 |
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221 Json::Value::Members members = headers.getMemberNames(); |
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222 |
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223 for (Json::Value::Members::const_iterator |
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224 it = members.begin(); it != members.end(); ++it) |
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225 { |
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226 this->httpClient_.AddHeader(*it, headers[*it].asString()); |
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227 } |
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228 } |
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229 |
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230 } |
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231 |
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232 |
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233 |
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234 int LuaContext::CallHttpGet(lua_State *state) |
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235 { |
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236 LuaContext& that = GetLuaContext(state); |
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237 |
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238 // Check the types of the arguments |
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239 int nArgs = lua_gettop(state); |
2261 | 240 if ((nArgs < 1 || nArgs > 2) || // check args count |
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241 !lua_isstring(state, 1)) // URL is a string |
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242 { |
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243 LOG(ERROR) << "Lua: Bad parameters to HttpGet()"; |
1438 | 244 lua_pushnil(state); |
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245 return 1; |
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246 } |
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247 |
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248 // Configure the HTTP client class |
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249 const char* url = lua_tostring(state, 1); |
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250 that.httpClient_.SetMethod(HttpMethod_Get); |
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251 that.httpClient_.SetUrl(url); |
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252 that.httpClient_.GetBody().clear(); |
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253 that.SetHttpHeaders(state, 2); |
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254 |
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255 // Do the HTTP GET request |
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256 if (!that.AnswerHttpQuery(state)) |
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257 { |
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258 LOG(ERROR) << "Lua: Error in HttpGet() for URL " << url; |
1438 | 259 lua_pushnil(state); |
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260 } |
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261 |
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262 return 1; |
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263 } |
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264 |
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265 |
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266 int LuaContext::CallHttpPostOrPut(lua_State *state, |
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267 HttpMethod method) |
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268 { |
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269 LuaContext& that = GetLuaContext(state); |
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270 |
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271 // Check the types of the arguments |
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272 int nArgs = lua_gettop(state); |
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273 if ((nArgs < 1 || nArgs > 3) || // check arg count |
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274 !lua_isstring(state, 1) || // URL is a string |
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275 (nArgs >= 2 && (!lua_isstring(state, 2) && !lua_isnil(state, 2)))) // Body data is null or is a string |
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276 { |
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277 LOG(ERROR) << "Lua: Bad parameters to HttpPost() or HttpPut()"; |
1438 | 278 lua_pushnil(state); |
1051 | 279 return 1; |
280 } | |
281 | |
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282 // Configure the HTTP client class |
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283 const char* url = lua_tostring(state, 1); |
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284 that.httpClient_.SetMethod(method); |
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285 that.httpClient_.SetUrl(url); |
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286 that.SetHttpHeaders(state, 3); |
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287 |
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288 if (nArgs >= 2 && !lua_isnil(state, 2)) |
1051 | 289 { |
2724 | 290 size_t bodySize = 0; |
291 const char* bodyData = lua_tolstring(state, 2, &bodySize); | |
292 | |
293 if (bodySize == 0) | |
294 { | |
295 that.httpClient_.GetBody().clear(); | |
296 } | |
297 else | |
298 { | |
299 that.httpClient_.GetBody().assign(bodyData, bodySize); | |
300 } | |
1051 | 301 } |
302 else | |
303 { | |
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304 that.httpClient_.GetBody().clear(); |
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305 } |
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306 |
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307 // Do the HTTP POST/PUT request |
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308 if (!that.AnswerHttpQuery(state)) |
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309 { |
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310 LOG(ERROR) << "Lua: Error in HttpPost() or HttpPut() for URL " << url; |
1438 | 311 lua_pushnil(state); |
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312 } |
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313 |
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314 return 1; |
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315 } |
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316 |
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317 |
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318 int LuaContext::CallHttpPost(lua_State *state) |
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319 { |
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320 return CallHttpPostOrPut(state, HttpMethod_Post); |
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321 } |
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322 |
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323 |
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324 int LuaContext::CallHttpPut(lua_State *state) |
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325 { |
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326 return CallHttpPostOrPut(state, HttpMethod_Put); |
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327 } |
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328 |
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329 |
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330 int LuaContext::CallHttpDelete(lua_State *state) |
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331 { |
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332 LuaContext& that = GetLuaContext(state); |
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333 |
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334 // Check the types of the arguments |
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335 int nArgs = lua_gettop(state); |
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336 if (nArgs < 1 || nArgs > 2 || !lua_isstring(state, 1)) // URL |
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337 { |
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338 LOG(ERROR) << "Lua: Bad parameters to HttpDelete()"; |
1438 | 339 lua_pushnil(state); |
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340 return 1; |
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341 } |
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342 |
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343 // Configure the HTTP client class |
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344 const char* url = lua_tostring(state, 1); |
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345 that.httpClient_.SetMethod(HttpMethod_Delete); |
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346 that.httpClient_.SetUrl(url); |
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347 that.httpClient_.GetBody().clear(); |
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348 that.SetHttpHeaders(state, 2); |
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349 |
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350 // Do the HTTP DELETE request |
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351 std::string s; |
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352 if (!that.httpClient_.Apply(s)) |
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353 { |
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354 LOG(ERROR) << "Lua: Error in HttpDelete() for URL " << url; |
1438 | 355 lua_pushnil(state); |
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356 } |
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357 else |
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358 { |
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359 lua_pushstring(state, "SUCCESS"); |
1051 | 360 } |
361 | |
362 return 1; | |
363 } | |
364 | |
365 | |
366 void LuaContext::PushJson(const Json::Value& value) | |
367 { | |
368 if (value.isString()) | |
369 { | |
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370 const std::string s = value.asString(); |
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371 lua_pushlstring(lua_, s.c_str(), s.size()); |
1051 | 372 } |
373 else if (value.isDouble()) | |
374 { | |
375 lua_pushnumber(lua_, value.asDouble()); | |
376 } | |
377 else if (value.isInt()) | |
378 { | |
379 lua_pushinteger(lua_, value.asInt()); | |
380 } | |
381 else if (value.isUInt()) | |
382 { | |
383 lua_pushinteger(lua_, value.asUInt()); | |
384 } | |
385 else if (value.isBool()) | |
386 { | |
387 lua_pushboolean(lua_, value.asBool()); | |
388 } | |
389 else if (value.isNull()) | |
390 { | |
391 lua_pushnil(lua_); | |
392 } | |
393 else if (value.isArray()) | |
394 { | |
395 lua_newtable(lua_); | |
396 | |
397 // http://lua-users.org/wiki/SimpleLuaApiExample | |
398 for (Json::Value::ArrayIndex i = 0; i < value.size(); i++) | |
399 { | |
400 // Push the table index (note the "+1" because of Lua conventions) | |
401 lua_pushnumber(lua_, i + 1); | |
402 | |
403 // Push the value of the cell | |
404 PushJson(value[i]); | |
405 | |
406 // Stores the pair in the table | |
407 lua_rawset(lua_, -3); | |
408 } | |
409 } | |
410 else if (value.isObject()) | |
411 { | |
412 lua_newtable(lua_); | |
413 | |
414 Json::Value::Members members = value.getMemberNames(); | |
415 | |
416 for (Json::Value::Members::const_iterator | |
417 it = members.begin(); it != members.end(); ++it) | |
418 { | |
419 // Push the index of the cell | |
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420 lua_pushlstring(lua_, it->c_str(), it->size()); |
1051 | 421 |
422 // Push the value of the cell | |
423 PushJson(value[*it]); | |
424 | |
425 // Stores the pair in the table | |
426 lua_rawset(lua_, -3); | |
427 } | |
428 } | |
429 else | |
430 { | |
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431 throw OrthancException(ErrorCode_JsonToLuaTable); |
1051 | 432 } |
433 } | |
434 | |
386 | 435 |
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436 void LuaContext::GetJson(Json::Value& result, |
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437 int top, |
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438 bool keepStrings) |
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439 { |
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440 if (lua_istable(lua_, top)) |
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441 { |
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442 Json::Value tmp = Json::objectValue; |
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443 bool isArray = true; |
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444 size_t size = 0; |
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445 |
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446 // Code adapted from: http://stackoverflow.com/a/6142700/881731 |
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447 |
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448 // Push another reference to the table on top of the stack (so we know |
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449 // where it is, and this function can work for negative, positive and |
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450 // pseudo indices |
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451 lua_pushvalue(lua_, top); |
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452 // stack now contains: -1 => table |
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453 lua_pushnil(lua_); |
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454 // stack now contains: -1 => nil; -2 => table |
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455 while (lua_next(lua_, -2)) |
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456 { |
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457 // stack now contains: -1 => value; -2 => key; -3 => table |
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458 // copy the key so that lua_tostring does not modify the original |
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459 lua_pushvalue(lua_, -2); |
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460 // stack now contains: -1 => key; -2 => value; -3 => key; -4 => table |
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461 std::string key(lua_tostring(lua_, -1)); |
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462 Json::Value v; |
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463 GetJson(v, -2, keepStrings); |
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464 |
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465 tmp[key] = v; |
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466 |
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467 size += 1; |
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468 try |
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469 { |
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470 if (!OnlyContainsDigits(key) || |
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471 boost::lexical_cast<size_t>(key) != size) |
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472 { |
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473 isArray = false; |
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474 } |
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475 } |
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476 catch (boost::bad_lexical_cast&) |
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477 { |
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478 isArray = false; |
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479 } |
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480 |
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481 // pop value + copy of key, leaving original key |
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482 lua_pop(lua_, 2); |
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483 // stack now contains: -1 => key; -2 => table |
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484 } |
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485 // stack now contains: -1 => table (when lua_next returns 0 it pops the key |
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486 // but does not push anything.) |
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487 // Pop table |
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488 lua_pop(lua_, 1); |
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489 |
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490 // Stack is now the same as it was on entry to this function |
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491 |
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492 if (isArray) |
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493 { |
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494 result = Json::arrayValue; |
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495 for (size_t i = 0; i < size; i++) |
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496 { |
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497 result.append(tmp[boost::lexical_cast<std::string>(i + 1)]); |
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498 } |
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499 } |
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500 else |
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501 { |
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502 result = tmp; |
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503 } |
1448
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504 } |
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505 else if (lua_isnil(lua_, top)) |
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506 { |
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507 result = Json::nullValue; |
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508 } |
1658
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509 else if (!keepStrings && |
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510 lua_isboolean(lua_, top)) |
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511 { |
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512 result = lua_toboolean(lua_, top) ? true : false; |
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513 } |
1658
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514 else if (!keepStrings && |
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515 lua_isnumber(lua_, top)) |
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516 { |
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517 // Convert to "int" if truncation does not loose precision |
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518 double value = static_cast<double>(lua_tonumber(lua_, top)); |
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519 int truncated = static_cast<int>(value); |
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520 |
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521 if (std::abs(value - static_cast<double>(truncated)) <= |
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522 std::numeric_limits<double>::epsilon()) |
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523 { |
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524 result = truncated; |
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525 } |
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526 else |
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527 { |
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528 result = value; |
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529 } |
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530 } |
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531 else if (lua_isstring(lua_, top)) |
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532 { |
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533 // Caution: The "lua_isstring()" case must be the last, since |
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534 // Lua can convert most types to strings by default. |
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535 result = std::string(lua_tostring(lua_, top)); |
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536 } |
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537 else if (lua_isboolean(lua_, top)) |
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538 { |
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|
539 result = lua_toboolean(lua_, top) ? true : false; |
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540 } |
1448
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541 else |
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542 { |
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543 LOG(WARNING) << "Unsupported Lua type when returning Json"; |
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544 result = Json::nullValue; |
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|
545 } |
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546 } |
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547 |
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|
548 |
386 | 549 LuaContext::LuaContext() |
550 { | |
551 lua_ = luaL_newstate(); | |
552 if (!lua_) | |
553 { | |
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|
554 throw OrthancException(ErrorCode_CannotCreateLua); |
386 | 555 } |
556 | |
557 luaL_openlibs(lua_); | |
558 lua_register(lua_, "print", PrintToLog); | |
1447
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|
559 lua_register(lua_, "ParseJson", ParseJson); |
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|
560 lua_register(lua_, "DumpJson", DumpJson); |
1051 | 561 lua_register(lua_, "HttpGet", CallHttpGet); |
1052
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1051
diff
changeset
|
562 lua_register(lua_, "HttpPost", CallHttpPost); |
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|
563 lua_register(lua_, "HttpPut", CallHttpPut); |
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|
564 lua_register(lua_, "HttpDelete", CallHttpDelete); |
1055
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|
565 lua_register(lua_, "SetHttpCredentials", SetHttpCredentials); |
1437
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|
566 |
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|
567 SetGlobalVariable("_LuaContext", this); |
386 | 568 } |
569 | |
570 | |
571 LuaContext::~LuaContext() | |
572 { | |
573 lua_close(lua_); | |
574 } | |
575 | |
576 | |
1055
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|
577 void LuaContext::ExecuteInternal(std::string* output, |
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|
578 const std::string& command) |
386 | 579 { |
418
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diff
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|
580 log_.clear(); |
386 | 581 int error = (luaL_loadbuffer(lua_, command.c_str(), command.size(), "line") || |
582 lua_pcall(lua_, 0, 0, 0)); | |
583 | |
584 if (error) | |
585 { | |
586 assert(lua_gettop(lua_) >= 1); | |
587 | |
588 std::string description(lua_tostring(lua_, -1)); | |
589 lua_pop(lua_, 1); /* pop error message from the stack */ | |
1055
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|
590 LOG(ERROR) << "Error while executing Lua script: " << description; |
1583
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|
591 throw OrthancException(ErrorCode_CannotExecuteLua); |
386 | 592 } |
418
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diff
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|
593 |
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|
594 if (output != NULL) |
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|
595 { |
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changeset
|
596 *output = log_; |
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|
597 } |
386 | 598 } |
599 | |
600 | |
2379
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diff
changeset
|
601 #if ORTHANC_HAS_EMBEDDED_RESOURCES == 1 |
386 | 602 void LuaContext::Execute(EmbeddedResources::FileResourceId resource) |
603 { | |
604 std::string command; | |
605 EmbeddedResources::GetFileResource(command, resource); | |
1055
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|
606 ExecuteInternal(NULL, command); |
386 | 607 } |
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diff
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|
608 #endif |
397
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diff
changeset
|
609 |
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diff
changeset
|
610 |
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diff
changeset
|
611 bool LuaContext::IsExistingFunction(const char* name) |
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|
612 { |
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diff
changeset
|
613 lua_settop(lua_, 0); |
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diff
changeset
|
614 lua_getglobal(lua_, name); |
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diff
changeset
|
615 return lua_type(lua_, -1) == LUA_TFUNCTION; |
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diff
changeset
|
616 } |
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|
617 |
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|
618 |
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|
619 void LuaContext::Execute(Json::Value& output, |
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|
620 const std::string& command) |
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|
621 { |
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|
622 std::string s; |
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|
623 ExecuteInternal(&s, command); |
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|
624 |
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|
625 Json::Reader reader; |
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|
626 if (!reader.parse(s, output)) |
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diff
changeset
|
627 { |
1596
f2e3d030ea59
BadJson error code
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diff
changeset
|
628 throw OrthancException(ErrorCode_BadJson); |
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|
629 } |
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|
630 } |
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changeset
|
631 |
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|
632 |
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|
633 void LuaContext::RegisterFunction(const char* name, |
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|
634 lua_CFunction func) |
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|
635 { |
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|
636 lua_register(lua_, name, func); |
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|
637 } |
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|
638 |
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changeset
|
639 |
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|
640 void LuaContext::SetGlobalVariable(const char* name, |
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changeset
|
641 void* value) |
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|
642 { |
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|
643 lua_pushlightuserdata(lua_, value); |
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parents:
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644 lua_setglobal(lua_, name); |
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
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645 } |
02f5a3f5c0a0
access to the REST API from Lua
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
1288
diff
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646 |
02f5a3f5c0a0
access to the REST API from Lua
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
1288
diff
changeset
|
647 |
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access to the REST API from Lua
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
1288
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648 const void* LuaContext::GetGlobalVariable(lua_State* state, |
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
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649 const char* name) |
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
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650 { |
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access to the REST API from Lua
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
1288
diff
changeset
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651 lua_getglobal(state, name); |
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
1288
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652 assert(lua_type(state, -1) == LUA_TLIGHTUSERDATA); |
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
1288
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changeset
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653 const void* value = lua_topointer(state, -1); |
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
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changeset
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654 lua_pop(state, 1); |
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access to the REST API from Lua
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
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changeset
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655 return value; |
02f5a3f5c0a0
access to the REST API from Lua
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
1288
diff
changeset
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656 } |
386 | 657 } |