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969
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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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975
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35 #include "../OrthancException.h"
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36
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969
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37 #include <cassert>
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38
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39 namespace Orthanc
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40 {
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972
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41 RestApiHierarchy::Handlers::Handlers() :
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42 getHandler_(NULL),
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43 postHandler_(NULL),
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44 putHandler_(NULL),
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45 deleteHandler_(NULL)
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46 {
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47 }
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48
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49
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50 bool RestApiHierarchy::Handlers::HasHandler(HttpMethod method) const
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51 {
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52 switch (method)
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53 {
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54 case HttpMethod_Get:
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55 return getHandler_ != NULL;
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56
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57 case HttpMethod_Post:
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58 return postHandler_ != NULL;
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59
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60 case HttpMethod_Put:
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61 return putHandler_ != NULL;
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62
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63 case HttpMethod_Delete:
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64 return deleteHandler_ != NULL;
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65
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66 default:
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67 throw OrthancException(ErrorCode_ParameterOutOfRange);
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68 }
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69 }
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70
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71
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969
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72 bool RestApiHierarchy::Handlers::IsEmpty() const
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73 {
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972
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74 return (getHandler_ == NULL &&
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75 postHandler_ == NULL &&
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76 putHandler_ == NULL &&
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77 deleteHandler_ == NULL);
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78 }
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79
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80
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974
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81 RestApiGetCall::Handler RestApiHierarchy::Handlers::GetGetHandler() const
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972
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82 {
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83 assert(getHandler_ != NULL);
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84 return getHandler_;
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85 }
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86
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974
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87 RestApiPutCall::Handler RestApiHierarchy::Handlers::GetPutHandler() const
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972
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88 {
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89 assert(putHandler_ != NULL);
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90 return putHandler_;
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91 }
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92
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974
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93 RestApiPostCall::Handler RestApiHierarchy::Handlers::GetPostHandler() const
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972
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94 {
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95 assert(postHandler_ != NULL);
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96 return postHandler_;
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97 }
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98
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974
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99 RestApiDeleteCall::Handler RestApiHierarchy::Handlers::GetDeleteHandler() const
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972
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100 {
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101 assert(deleteHandler_ != NULL);
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102 return deleteHandler_;
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969
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103 }
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104
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105
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106 RestApiHierarchy& RestApiHierarchy::AddChild(Children& children,
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107 const std::string& name)
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108 {
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109 Children::iterator it = children.find(name);
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110
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111 if (it == children.end())
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112 {
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113 // Create new child
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114 RestApiHierarchy *child = new RestApiHierarchy;
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115 children[name] = child;
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116 return *child;
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117 }
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118 else
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119 {
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120 return *it->second;
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121 }
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122 }
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123
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124
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125 void RestApiHierarchy::DeleteChildren(Children& children)
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126 {
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127 for (Children::iterator it = children.begin();
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128 it != children.end(); it++)
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129 {
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130 delete it->second;
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131 }
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132 }
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133
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134
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135 template <typename Handler>
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136 void RestApiHierarchy::RegisterInternal(const RestApiPath& path,
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137 Handler handler,
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138 size_t level)
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139 {
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140 if (path.GetLevelCount() == level)
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141 {
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142 if (path.IsUniversalTrailing())
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143 {
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144 universalHandlers_.Register(handler);
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145 }
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146 else
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147 {
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148 handlers_.Register(handler);
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149 }
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150 }
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151 else
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152 {
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153 RestApiHierarchy* child;
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154 if (path.IsWildcardLevel(level))
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155 {
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156 child = &AddChild(wildcardChildren_, path.GetWildcardName(level));
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157 }
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158 else
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159 {
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160 child = &AddChild(children_, path.GetLevelName(level));
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161 }
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162
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163 child->RegisterInternal(path, handler, level + 1);
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164 }
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165 }
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166
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167
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975
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168 bool RestApiHierarchy::LookupHandler(HttpHandler::Arguments& components,
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969
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169 const UriComponents& uri,
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170 ResourceCallback callback,
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171 size_t level,
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172 void* call)
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173 {
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174 assert(uri.size() >= level);
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175 UriComponents trailing;
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176
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177 // Look for an exact match on the resource of interest
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178 if (uri.size() == level)
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179 {
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180 if (!handlers_.IsEmpty() &&
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181 callback(handlers_, uri, components, trailing, call))
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182 {
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183 return true;
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184 }
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185 }
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186
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187
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188 // Try and go down in the hierarchy, using an exact match for the child
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189 Children::const_iterator child = children_.find(uri[level]);
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190 if (child != children_.end())
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191 {
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192 if (child->second->LookupHandler(components, uri, callback, level + 1, call))
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193 {
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194 return true;
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195 }
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196 }
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197
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198
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199 // Try and go down in the hierarchy, using wildcard rules for children
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200 for (child = wildcardChildren_.begin();
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201 child != wildcardChildren_.end(); child++)
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202 {
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975
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203 HttpHandler::Arguments subComponents = components;
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969
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204 subComponents[child->first] = uri[level];
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205
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206 if (child->second->LookupHandler(components, uri, callback, level + 1, call))
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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
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213 // As a last resort, call the universal handlers, if any
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214 if (!universalHandlers_.IsEmpty())
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215 {
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216 trailing.resize(uri.size() - level);
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217 size_t pos = 0;
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218 for (size_t i = level; i < uri.size(); i++, pos++)
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219 {
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220 trailing[pos] = uri[i];
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221 }
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222
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223 assert(pos == trailing.size());
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224
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225 if (callback(universalHandlers_, uri, components, trailing, call))
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226 {
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227 return true;
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228 }
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229 }
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230
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231 return false;
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232 }
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233
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234
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235 bool RestApiHierarchy::GetDirectory(Json::Value& result,
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236 const UriComponents& uri,
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237 size_t level)
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238 {
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239 if (uri.size() == level)
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240 {
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972
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241 if (!handlers_.HasHandler(HttpMethod_Get) &&
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969
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242 universalHandlers_.IsEmpty() &&
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243 wildcardChildren_.size() == 0)
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244 {
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245 result = Json::arrayValue;
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246
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247 for (Children::const_iterator it = children_.begin();
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248 it != children_.end(); it++)
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249 {
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250 result.append(it->first);
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251 }
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252
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253 return true;
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254 }
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255 else
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256 {
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257 return false;
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258 }
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259 }
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260
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261 Children::const_iterator child = children_.find(uri[level]);
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262 if (child != children_.end())
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263 {
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264 if (child->second->GetDirectory(result, uri, level + 1))
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265 {
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266 return true;
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267 }
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268 }
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269
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270 for (child = wildcardChildren_.begin();
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271 child != wildcardChildren_.end(); child++)
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272 {
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273 if (child->second->GetDirectory(result, uri, level + 1))
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274 {
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275 return true;
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276 }
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277 }
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278
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279 return false;
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280 }
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281
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282
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283 bool RestApiHierarchy::GetCallback(Handlers& handlers,
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284 const UriComponents& uri,
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975
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285 const HttpHandler::Arguments& components,
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969
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286 const UriComponents& trailing,
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287 void* call)
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288 {
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972
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289 if (handlers.HasHandler(HttpMethod_Get))
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969
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290 {
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974
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291 handlers.GetGetHandler() (*reinterpret_cast<RestApiGetCall*>(call));
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969
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292 return true;
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293 }
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972
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294 else
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295 {
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296 return false;
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297 }
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969
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298 }
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299
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300
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301 bool RestApiHierarchy::PostCallback(Handlers& handlers,
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302 const UriComponents& uri,
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975
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303 const HttpHandler::Arguments& components,
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969
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304 const UriComponents& trailing,
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305 void* call)
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306 {
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972
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307 if (handlers.HasHandler(HttpMethod_Post))
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969
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308 {
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974
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309 handlers.GetPostHandler() (*reinterpret_cast<RestApiPostCall*>(call));
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969
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310 return true;
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311 }
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972
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312 else
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313 {
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314 return false;
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315 }
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969
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316 }
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317
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318
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319 bool RestApiHierarchy::PutCallback(Handlers& handlers,
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320 const UriComponents& uri,
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975
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321 const HttpHandler::Arguments& components,
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969
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322 const UriComponents& trailing,
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323 void* call)
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324 {
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972
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325 if (handlers.HasHandler(HttpMethod_Put))
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969
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326 {
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974
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327 handlers.GetPutHandler() (*reinterpret_cast<RestApiPutCall*>(call));
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969
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328 return true;
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329 }
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972
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330 else
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331 {
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332 return false;
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333 }
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969
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334 }
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335
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336
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337 bool RestApiHierarchy::DeleteCallback(Handlers& handlers,
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338 const UriComponents& uri,
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975
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339 const HttpHandler::Arguments& components,
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969
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340 const UriComponents& trailing,
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341 void* call)
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342 {
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972
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343 if (handlers.HasHandler(HttpMethod_Delete))
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969
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344 {
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974
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345 handlers.GetDeleteHandler() (*reinterpret_cast<RestApiDeleteCall*>(call));
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969
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346 return true;
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347 }
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972
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348 else
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349 {
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350 return false;
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351 }
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969
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352 }
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353
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354
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355 RestApiHierarchy::~RestApiHierarchy()
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356 {
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357 DeleteChildren(children_);
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358 DeleteChildren(wildcardChildren_);
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359 }
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360
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970
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361 void RestApiHierarchy::Register(const std::string& uri,
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974
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362 RestApiGetCall::Handler handler)
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969
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363 {
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970
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364 RestApiPath path(uri);
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969
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365 RegisterInternal(path, handler, 0);
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366 }
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367
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970
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368 void RestApiHierarchy::Register(const std::string& uri,
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974
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369 RestApiPutCall::Handler handler)
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969
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370 {
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970
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371 RestApiPath path(uri);
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969
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372 RegisterInternal(path, handler, 0);
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373 }
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374
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970
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375 void RestApiHierarchy::Register(const std::string& uri,
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974
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376 RestApiPostCall::Handler handler)
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969
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377 {
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970
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378 RestApiPath path(uri);
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969
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379 RegisterInternal(path, handler, 0);
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380 }
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381
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970
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382 void RestApiHierarchy::Register(const std::string& uri,
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974
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383 RestApiDeleteCall::Handler handler)
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969
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384 {
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970
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385 RestApiPath path(uri);
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969
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386 RegisterInternal(path, handler, 0);
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387 }
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388
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389 void RestApiHierarchy::CreateSiteMap(Json::Value& target) const
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390 {
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391 if (children_.size() == 0)
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392 {
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393 std::string s = " ";
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972
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394 if (handlers_.HasHandler(HttpMethod_Get))
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969
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395 {
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396 s += "GET ";
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397 }
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398
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972
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399 if (handlers_.HasHandler(HttpMethod_Post))
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969
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400 {
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401 s += "POST ";
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402 }
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403
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972
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404 if (handlers_.HasHandler(HttpMethod_Put))
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969
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405 {
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406 s += "PUT ";
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407 }
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408
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972
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409 if (handlers_.HasHandler(HttpMethod_Delete))
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969
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410 {
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411 s += "DELETE ";
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412 }
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413
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414 target = s;
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415 }
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416 else
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417 {
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418 target = Json::objectValue;
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419
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420 for (Children::const_iterator it = children_.begin();
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421 it != children_.end(); it++)
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422 {
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423 it->second->CreateSiteMap(target[it->first]);
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424 }
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425 }
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426
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427 /*for (Children::const_iterator it = wildcardChildren_.begin();
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428 it != wildcardChildren_.end(); it++)
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429 {
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430 it->second->CreateSiteMap(target["* (" + it->first + ")"]);
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431 }*/
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432 }
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433
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|
974
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434 bool RestApiHierarchy::Handle(RestApiGetCall& call,
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969
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435 const UriComponents& uri)
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436 {
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975
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437 HttpHandler::Arguments components;
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969
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438 return LookupHandler(components, uri, GetCallback, 0, &call);
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439 }
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440
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974
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441 bool RestApiHierarchy::Handle(RestApiPutCall& call,
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969
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442 const UriComponents& uri)
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443 {
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975
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444 HttpHandler::Arguments components;
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969
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445 return LookupHandler(components, uri, PutCallback, 0, &call);
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446 }
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447
|
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974
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448 bool RestApiHierarchy::Handle(RestApiPostCall& call,
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969
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449 const UriComponents& uri)
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450 {
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975
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451 HttpHandler::Arguments components;
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969
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452 return LookupHandler(components, uri, PostCallback, 0, &call);
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453 }
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454
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|
974
|
455 bool RestApiHierarchy::Handle(RestApiDeleteCall& call,
|
|
969
|
456 const UriComponents& uri)
|
|
|
457 {
|
|
975
|
458 HttpHandler::Arguments components;
|
|
969
|
459 return LookupHandler(components, uri, DeleteCallback, 0, &call);
|
|
|
460 }
|
|
|
461
|
|
|
462 }
|
