annotate Core/Toolbox.cpp @ 0:3959d33612cc

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 19 Jul 2012 14:32:22 +0200
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children 3a584803783e
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1 /**
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2 * Palantir - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012 Medical Physics Department, CHU of Liege,
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4 * Belgium
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5 *
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6 * This program is free software: you can redistribute it and/or
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7 * modify it under the terms of the GNU General Public License as
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8 * published by the Free Software Foundation, either version 3 of the
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9 * License, or (at your option) any later version.
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10 *
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11 * This program is distributed in the hope that it will be useful, but
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12 * WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 * General Public License for more details.
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15 *
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16 * You should have received a copy of the GNU General Public License
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17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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18 **/
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19
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20
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21 #include "Toolbox.h"
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22
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23 #include "PalantirException.h"
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24
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25 #include <string.h>
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26 #include <boost/filesystem.hpp>
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27 #include <boost/filesystem/fstream.hpp>
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28 #include <algorithm>
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29
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30 #if defined(_WIN32)
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31 #include <windows.h>
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32 #endif
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33
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34 #if defined(__linux)
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35 #include <unistd.h>
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36 #endif
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37
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38 #include <signal.h>
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39
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40 namespace Palantir
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41 {
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42 static bool finish;
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43
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44 static void SignalHandler(int)
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45 {
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46 finish = true;
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47 }
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48
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49
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50 void Toolbox::Sleep(uint32_t seconds)
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51 {
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52 #if defined(_WIN32)
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53 ::Sleep(static_cast<DWORD>(seconds) * static_cast<DWORD>(1000));
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54 #elif defined(__linux)
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55 usleep(static_cast<uint64_t>(seconds) * static_cast<uint64_t>(1000000));
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56 #else
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57 #error Support your platform here
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58 #endif
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59 }
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60
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61 void Toolbox::USleep(uint64_t microSeconds)
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62 {
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63 #if defined(_WIN32)
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64 ::Sleep(microSeconds / static_cast<uint64_t>(1000));
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65 #elif defined(__linux)
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66 usleep(microSeconds);
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67 #else
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68 #error Support your platform here
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69 #endif
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70 }
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71
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72
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73 void Toolbox::ServerBarrier()
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74 {
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75 signal(SIGINT, SignalHandler);
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76
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77 #if !defined(_WIN32)
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78 signal(SIGQUIT, SignalHandler);
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79 #endif
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80
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81 finish = false;
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82 while (!finish)
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83 {
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84 USleep(100000);
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85 }
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86
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87 signal(SIGINT, NULL);
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88
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89 #if !defined(_WIN32)
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90 signal(SIGQUIT, NULL);
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91 #endif
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92 }
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93
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94
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95
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96 void Toolbox::ToUpperCase(std::string& s)
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97 {
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98 std::transform(s.begin(), s.end(), s.begin(), toupper);
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99 }
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100
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101
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102 void Toolbox::ToLowerCase(std::string& s)
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103 {
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104 std::transform(s.begin(), s.end(), s.begin(), tolower);
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105 }
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106
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107
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108
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109 void Toolbox::ReadFile(std::string& content,
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110 const std::string& path)
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111 {
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112 boost::filesystem::ifstream f;
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113 f.open(path, std::ifstream::in | std::ios::binary);
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114 if (!f.good())
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115 {
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116 throw PalantirException("Unable to open a file");
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117 }
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118
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119 // http://www.cplusplus.com/reference/iostream/istream/tellg/
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120 f.seekg(0, std::ios::end);
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121 std::streamsize size = f.tellg();
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122 f.seekg(0, std::ios::beg);
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123
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124 content.resize(size);
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125 if (size != 0)
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126 {
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127 f.read(reinterpret_cast<char*>(&content[0]), size);
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128 }
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129
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130 f.close();
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131 }
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132
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133
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134 void Toolbox::RemoveFile(const std::string& path)
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135 {
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136 if (boost::filesystem::exists(path))
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137 {
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138 if (boost::filesystem::is_regular_file(path))
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139 boost::filesystem::remove(path);
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140 else
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141 throw PalantirException("The path is not a regular file: " + path);
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142 }
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143 }
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144
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145
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146
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147 void Toolbox::SplitUriComponents(UriComponents& components,
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148 const std::string& uri)
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149 {
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150 static const char URI_SEPARATOR = '/';
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151
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152 components.clear();
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153
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154 if (uri.size() == 0 ||
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155 uri[0] != URI_SEPARATOR)
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156 {
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157 throw PalantirException(ErrorCode_UriSyntax);
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158 }
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159
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160 // Count the number of slashes in the URI to make an assumption
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161 // about the number of components in the URI
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162 unsigned int estimatedSize = 0;
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163 for (unsigned int i = 0; i < uri.size(); i++)
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164 {
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165 if (uri[i] == URI_SEPARATOR)
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166 estimatedSize++;
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167 }
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168
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169 components.reserve(estimatedSize - 1);
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170
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171 unsigned int start = 1;
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172 unsigned int end = 1;
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173 while (end < uri.size())
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174 {
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175 // This is the loop invariant
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176 assert(uri[start - 1] == '/' && (end >= start));
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177
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178 if (uri[end] == '/')
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179 {
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180 components.push_back(std::string(&uri[start], end - start));
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181 end++;
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182 start = end;
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183 }
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184 else
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185 {
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186 end++;
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187 }
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188 }
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189
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190 if (start < uri.size())
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191 {
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192 components.push_back(std::string(&uri[start], end - start));
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193 }
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194 }
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195
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196
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197 bool Toolbox::IsChildUri(const UriComponents& baseUri,
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198 const UriComponents& testedUri)
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199 {
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200 if (testedUri.size() < baseUri.size())
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201 {
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202 return false;
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203 }
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204
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205 for (size_t i = 0; i < baseUri.size(); i++)
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206 {
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207 if (baseUri[i] != testedUri[i])
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208 return false;
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209 }
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210
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211 return true;
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212 }
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213
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214
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215 std::string Toolbox::AutodetectMimeType(const std::string& path)
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216 {
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217 std::string contentType;
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218 size_t lastDot = path.rfind('.');
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219 size_t lastSlash = path.rfind('/');
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220
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221 if (lastDot == std::string::npos ||
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222 (lastSlash != std::string::npos && lastDot < lastSlash))
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223 {
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224 // No trailing dot, unable to detect the content type
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225 }
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226 else
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227 {
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228 const char* extension = &path[lastDot + 1];
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229
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230 // http://en.wikipedia.org/wiki/Mime_types
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231 // Text types
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232 if (!strcmp(extension, "txt"))
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233 contentType = "text/plain";
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234 else if (!strcmp(extension, "html"))
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235 contentType = "text/html";
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236 else if (!strcmp(extension, "xml"))
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237 contentType = "text/xml";
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238 else if (!strcmp(extension, "css"))
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239 contentType = "text/css";
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240
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241 // Application types
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242 else if (!strcmp(extension, "js"))
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243 contentType = "application/javascript";
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244 else if (!strcmp(extension, "json"))
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245 contentType = "application/json";
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246 else if (!strcmp(extension, "pdf"))
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247 contentType = "application/pdf";
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248
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249 // Images types
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250 else if (!strcmp(extension, "jpg") || !strcmp(extension, "jpeg"))
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251 contentType = "image/jpeg";
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252 else if (!strcmp(extension, "gif"))
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253 contentType = "image/gif";
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254 else if (!strcmp(extension, "png"))
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255 contentType = "image/png";
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256 }
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257
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258 return contentType;
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259 }
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260
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261
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262 std::string Toolbox::FlattenUri(const UriComponents& components,
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263 size_t fromLevel)
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264 {
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265 if (components.size() <= fromLevel)
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266 {
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267 return "/";
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268 }
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269 else
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270 {
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271 std::string r;
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272
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273 for (size_t i = fromLevel; i < components.size(); i++)
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274 {
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275 r += "/" + components[i];
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276 }
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277
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278 return r;
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279 }
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280 }
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281
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282
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283
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284 uint64_t Toolbox::GetFileSize(const std::string& path)
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285 {
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286 try
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287 {
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288 return static_cast<uint64_t>(boost::filesystem::file_size(path));
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289 }
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290 catch (boost::filesystem::filesystem_error)
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291 {
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292 throw PalantirException(ErrorCode_InexistentFile);
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293 }
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294 }
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295 }