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1 /**
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2 * Orthanc - 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 * 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 #pragma once
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34
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35 #include "../IDynamicObject.h"
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36 #include "../HttpServer/HttpHandler.h"
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37 #include "RestApiPath.h"
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38 #include "RestApiOutput.h"
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39
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40 namespace Orthanc
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41 {
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42 class RestApi : public HttpHandler
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43 {
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44 private:
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45 class SharedCall
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46 {
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47 friend class RestApi;
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48
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49 private:
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50 RestApiOutput* output_;
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51 IDynamicObject* context_;
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52 const HttpHandler::Arguments* httpHeaders_;
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53 const RestApiPath::Components* uriComponents_;
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54 const UriComponents* trailing_;
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55
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56 public:
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57 RestApiOutput& GetOutput()
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58 {
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59 return *output_;
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60 }
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61
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62 IDynamicObject* GetContext()
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63 {
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64 return context_;
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65 }
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66
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67 const HttpHandler::Arguments& GetHttpHeaders() const
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68 {
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69 return *httpHeaders_;
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70 }
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71
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72 const RestApiPath::Components& GetUriComponents() const
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73 {
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74 return *uriComponents_;
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75 }
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76
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77 const UriComponents& GetTrailing() const
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78 {
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79 return *trailing_;
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80 }
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81
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82 std::string GetUriComponent(const std::string& name,
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83 const std::string& defaultValue)
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84 {
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85 return HttpHandler::GetArgument(*uriComponents_, name, defaultValue);
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86 }
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87 };
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88
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89
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90 public:
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91 class GetCall : public SharedCall
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92 {
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93 friend class RestApi;
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94
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95 private:
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96 const HttpHandler::Arguments* getArguments_;
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97
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98 public:
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99 std::string GetArgument(const std::string& name,
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100 const std::string& defaultValue)
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101 {
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102 return HttpHandler::GetArgument(*getArguments_, name, defaultValue);
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103 }
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104 };
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105
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106 class PutCall : public SharedCall
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107 {
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108 friend class RestApi;
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109
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110 private:
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111 const std::string* data_;
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112
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113 public:
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114 const std::string& GetData()
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115 {
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116 return *data_;
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117 }
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118 };
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119
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120 class PostCall : public SharedCall
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121 {
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122 friend class RestApi;
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123
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124 private:
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125 const std::string* data_;
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126
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127 public:
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128 const std::string& GetData()
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129 {
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130 return *data_;
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131 }
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132 };
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133
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134 class DeleteCall : public SharedCall
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135 {
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136 };
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137
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138 typedef void (*GetHandler) (GetCall& call);
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139
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140 typedef void (*DeleteHandler) (DeleteCall& call);
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141
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142 typedef void (*PutHandler) (PutCall& call);
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143
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144 typedef void (*PostHandler) (PostCall& call);
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145
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146 private:
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147 typedef std::list< std::pair<RestApiPath*, GetHandler> > GetHandlers;
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148 typedef std::list< std::pair<RestApiPath*, PutHandler> > PutHandlers;
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149 typedef std::list< std::pair<RestApiPath*, PostHandler> > PostHandlers;
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150 typedef std::list< std::pair<RestApiPath*, DeleteHandler> > DeleteHandlers;
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151
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152 // CAUTION: PLEASE INTRODUCE MUTEX BETWEEN CONTEXTS !!!
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153 std::auto_ptr<IDynamicObject> context_;
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154
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155 GetHandlers getHandlers_;
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156 PutHandlers putHandlers_;
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157 PostHandlers postHandlers_;
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158 DeleteHandlers deleteHandlers_;
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159
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160 bool IsGetAccepted(const UriComponents& uri);
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161 bool IsPutAccepted(const UriComponents& uri);
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162 bool IsPostAccepted(const UriComponents& uri);
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163 bool IsDeleteAccepted(const UriComponents& uri);
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164
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165 std::string GetAcceptedMethods(const UriComponents& uri);
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166
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167 public:
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168 RestApi()
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169 {
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170 }
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171
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172 void SetContext(IDynamicObject* context) // This takes the ownership
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173 {
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174 context_.reset(context);
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175 }
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176
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177 ~RestApi();
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178
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179 virtual bool IsServedUri(const UriComponents& uri);
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180
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181 virtual void Handle(HttpOutput& output,
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182 const std::string& method,
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183 const UriComponents& uri,
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184 const Arguments& headers,
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185 const Arguments& getArguments,
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186 const std::string& postData);
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187
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188 void Register(const std::string& path,
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189 GetHandler handler);
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190
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191 void Register(const std::string& path,
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192 PutHandler handler);
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193
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194 void Register(const std::string& path,
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195 PostHandler handler);
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196
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197 void Register(const std::string& path,
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198 DeleteHandler handler);
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199 };
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200 }
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