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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2014 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 * In addition, as a special exception, the copyright holders of this
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12 * program give permission to link the code of its release with the
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13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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14 * that use the same license as the "OpenSSL" library), and distribute
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15 * the linked executables. You must obey the GNU General Public License
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16 * in all respects for all of the code used other than "OpenSSL". If you
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17 * modify file(s) with this exception, you may extend this exception to
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18 * your version of the file(s), but you are not obligated to do so. If
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19 * you do not wish to do so, delete this exception statement from your
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20 * version. If you delete this exception statement from all source files
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21 * in the program, then also delete it here.
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22 *
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23 * This program is distributed in the hope that it will be useful, but
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24 * WITHOUT ANY WARRANTY; without even the implied warranty of
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25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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26 * General Public License for more details.
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27 *
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28 * You should have received a copy of the GNU General Public License
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29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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30 **/
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31
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32
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33 #include "RestApiHierarchy.h"
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34
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35 #include <cassert>
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36
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37 namespace Orthanc
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38 {
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39 bool RestApiHierarchy::Handlers::IsEmpty() const
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40 {
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41 return (getHandlers_.empty() &&
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42 postHandlers_.empty() &&
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43 putHandlers_.empty() &&
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44 deleteHandlers_.empty());
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45 }
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46
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47
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48 RestApiHierarchy& RestApiHierarchy::AddChild(Children& children,
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49 const std::string& name)
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50 {
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51 Children::iterator it = children.find(name);
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52
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53 if (it == children.end())
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54 {
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55 // Create new child
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56 RestApiHierarchy *child = new RestApiHierarchy;
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57 children[name] = child;
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58 return *child;
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59 }
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60 else
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61 {
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62 return *it->second;
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63 }
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64 }
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65
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66
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67 void RestApiHierarchy::DeleteChildren(Children& children)
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68 {
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69 for (Children::iterator it = children.begin();
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70 it != children.end(); it++)
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71 {
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72 delete it->second;
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73 }
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74 }
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75
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76
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77 template <typename Handler>
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78 void RestApiHierarchy::RegisterInternal(const RestApiPath& path,
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79 Handler handler,
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80 size_t level)
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81 {
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82 if (path.GetLevelCount() == level)
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83 {
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84 if (path.IsUniversalTrailing())
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85 {
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86 universalHandlers_.Register(handler);
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87 }
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88 else
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89 {
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90 handlers_.Register(handler);
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91 }
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92 }
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93 else
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94 {
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95 RestApiHierarchy* child;
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96 if (path.IsWildcardLevel(level))
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97 {
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98 child = &AddChild(wildcardChildren_, path.GetWildcardName(level));
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99 }
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100 else
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101 {
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102 child = &AddChild(children_, path.GetLevelName(level));
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103 }
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104
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105 child->RegisterInternal(path, handler, level + 1);
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106 }
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107 }
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108
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109
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110 bool RestApiHierarchy::LookupHandler(RestApiPath::Components& components,
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111 const UriComponents& uri,
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112 ResourceCallback callback,
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113 size_t level,
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114 void* call)
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115 {
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116 assert(uri.size() >= level);
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117 UriComponents trailing;
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118
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119 // Look for an exact match on the resource of interest
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120 if (uri.size() == level)
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121 {
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122 if (!handlers_.IsEmpty() &&
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123 callback(handlers_, uri, components, trailing, call))
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124 {
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125 return true;
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126 }
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127 }
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128
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129
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130 // Try and go down in the hierarchy, using an exact match for the child
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131 Children::const_iterator child = children_.find(uri[level]);
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132 if (child != children_.end())
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133 {
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134 if (child->second->LookupHandler(components, uri, callback, level + 1, call))
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135 {
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136 return true;
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137 }
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138 }
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139
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140
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141 // Try and go down in the hierarchy, using wildcard rules for children
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142 for (child = wildcardChildren_.begin();
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143 child != wildcardChildren_.end(); child++)
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144 {
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145 RestApiPath::Components subComponents = components;
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146 subComponents[child->first] = uri[level];
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147
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148 if (child->second->LookupHandler(components, uri, callback, level + 1, call))
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149 {
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150 return true;
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151 }
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152 }
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153
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154
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155 // As a last resort, call the universal handlers, if any
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156 if (!universalHandlers_.IsEmpty())
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157 {
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158 trailing.resize(uri.size() - level);
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159 size_t pos = 0;
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160 for (size_t i = level; i < uri.size(); i++, pos++)
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161 {
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162 trailing[pos] = uri[i];
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163 }
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164
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165 assert(pos == trailing.size());
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166
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167 if (callback(universalHandlers_, uri, components, trailing, call))
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168 {
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169 return true;
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170 }
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171 }
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172
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173 return false;
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174 }
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175
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176
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177 bool RestApiHierarchy::GetDirectory(Json::Value& result,
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178 const UriComponents& uri,
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179 size_t level)
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180 {
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181 if (uri.size() == level)
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182 {
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183 if (!handlers_.HasGet() &&
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184 universalHandlers_.IsEmpty() &&
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185 wildcardChildren_.size() == 0)
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186 {
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187 result = Json::arrayValue;
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188
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189 for (Children::const_iterator it = children_.begin();
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190 it != children_.end(); it++)
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191 {
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192 result.append(it->first);
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193 }
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194
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195 return true;
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196 }
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197 else
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198 {
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199 return false;
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200 }
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201 }
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202
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203 Children::const_iterator child = children_.find(uri[level]);
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204 if (child != children_.end())
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205 {
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206 if (child->second->GetDirectory(result, uri, level + 1))
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207 {
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208 return true;
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209 }
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210 }
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211
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212 for (child = wildcardChildren_.begin();
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213 child != wildcardChildren_.end(); child++)
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214 {
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215 if (child->second->GetDirectory(result, uri, level + 1))
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216 {
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217 return true;
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218 }
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219 }
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220
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221 return false;
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222 }
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223
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224
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225 bool RestApiHierarchy::GetCallback(Handlers& handlers,
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226 const UriComponents& uri,
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227 const RestApiPath::Components& components,
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228 const UriComponents& trailing,
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229 void* call)
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230 {
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231 for (Handlers::GetHandlers::iterator
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232 it = handlers.getHandlers_.begin();
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233 it != handlers.getHandlers_.end(); it++)
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234 {
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235 // TODO RETURN BOOL
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236
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237 (*it) (*reinterpret_cast<RestApi::GetCall*>(call));
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238 return true;
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239 }
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240
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241 return false;
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242 }
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243
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244
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245 bool RestApiHierarchy::PostCallback(Handlers& handlers,
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246 const UriComponents& uri,
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247 const RestApiPath::Components& components,
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248 const UriComponents& trailing,
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249 void* call)
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250 {
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251 for (Handlers::PostHandlers::iterator
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252 it = handlers.postHandlers_.begin();
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253 it != handlers.postHandlers_.end(); it++)
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254 {
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255 // TODO RETURN BOOL
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256
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257 (*it) (*reinterpret_cast<RestApi::PostCall*>(call));
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258 return true;
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259 }
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260
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261 return false;
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262 }
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263
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264
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265 bool RestApiHierarchy::PutCallback(Handlers& handlers,
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266 const UriComponents& uri,
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267 const RestApiPath::Components& components,
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268 const UriComponents& trailing,
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269 void* call)
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270 {
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271 for (Handlers::PutHandlers::iterator
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272 it = handlers.putHandlers_.begin();
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273 it != handlers.putHandlers_.end(); it++)
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274 {
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275 // TODO RETURN BOOL
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276
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277 (*it) (*reinterpret_cast<RestApi::PutCall*>(call));
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278 return true;
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279 }
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280
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281 return false;
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282 }
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283
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284
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285 bool RestApiHierarchy::DeleteCallback(Handlers& handlers,
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286 const UriComponents& uri,
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287 const RestApiPath::Components& components,
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288 const UriComponents& trailing,
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289 void* call)
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290 {
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291 for (Handlers::DeleteHandlers::iterator
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292 it = handlers.deleteHandlers_.begin();
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293 it != handlers.deleteHandlers_.end(); it++)
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294 {
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295 // TODO RETURN BOOL
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296
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297 (*it) (*reinterpret_cast<RestApi::DeleteCall*>(call));
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298 return true;
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299 }
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300
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301 return false;
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302 }
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303
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304
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305 RestApiHierarchy::~RestApiHierarchy()
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306 {
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307 DeleteChildren(children_);
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308 DeleteChildren(wildcardChildren_);
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309 }
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310
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970
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311 void RestApiHierarchy::Register(const std::string& uri,
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969
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312 RestApi::GetHandler handler)
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313 {
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970
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314 RestApiPath path(uri);
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969
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315 RegisterInternal(path, handler, 0);
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316 }
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317
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970
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318 void RestApiHierarchy::Register(const std::string& uri,
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969
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319 RestApi::PutHandler handler)
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320 {
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970
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321 RestApiPath path(uri);
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969
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322 RegisterInternal(path, handler, 0);
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323 }
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324
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970
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325 void RestApiHierarchy::Register(const std::string& uri,
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969
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326 RestApi::PostHandler handler)
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327 {
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970
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328 RestApiPath path(uri);
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969
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329 RegisterInternal(path, handler, 0);
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330 }
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331
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970
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332 void RestApiHierarchy::Register(const std::string& uri,
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969
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333 RestApi::DeleteHandler handler)
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334 {
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970
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335 RestApiPath path(uri);
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969
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336 RegisterInternal(path, handler, 0);
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337 }
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338
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339 void RestApiHierarchy::CreateSiteMap(Json::Value& target) const
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340 {
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341 if (children_.size() == 0)
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342 {
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343 std::string s = " ";
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344 if (handlers_.getHandlers_.size() != 0)
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345 {
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346 s += "GET ";
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347 }
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348
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349 if (handlers_.postHandlers_.size() != 0)
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350 {
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351 s += "POST ";
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352 }
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353
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354 if (handlers_.putHandlers_.size() != 0)
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355 {
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356 s += "PUT ";
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357 }
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358
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359 if (handlers_.deleteHandlers_.size() != 0)
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360 {
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361 s += "DELETE ";
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362 }
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363
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364 target = s;
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365 }
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366 else
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367 {
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368 target = Json::objectValue;
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369
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370 for (Children::const_iterator it = children_.begin();
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371 it != children_.end(); it++)
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372 {
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373 it->second->CreateSiteMap(target[it->first]);
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374 }
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375 }
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376
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377 /*for (Children::const_iterator it = wildcardChildren_.begin();
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378 it != wildcardChildren_.end(); it++)
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379 {
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380 it->second->CreateSiteMap(target["* (" + it->first + ")"]);
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381 }*/
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382 }
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383
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384 bool RestApiHierarchy::Handle(RestApi::GetCall& call,
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385 const UriComponents& uri)
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386 {
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387 RestApiPath::Components components;
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388 return LookupHandler(components, uri, GetCallback, 0, &call);
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389 }
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390
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391 bool RestApiHierarchy::Handle(RestApi::PutCall& call,
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392 const UriComponents& uri)
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393 {
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394 RestApiPath::Components components;
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395 return LookupHandler(components, uri, PutCallback, 0, &call);
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396 }
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397
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398 bool RestApiHierarchy::Handle(RestApi::PostCall& call,
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399 const UriComponents& uri)
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400 {
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401 RestApiPath::Components components;
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402 return LookupHandler(components, uri, PostCallback, 0, &call);
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403 }
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404
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405 bool RestApiHierarchy::Handle(RestApi::DeleteCall& call,
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406 const UriComponents& uri)
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407 {
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408 RestApiPath::Components components;
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409 return LookupHandler(components, uri, DeleteCallback, 0, &call);
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410 }
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411
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412 }
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