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annotate Plugins/Samples/WebSkeleton/Framework/Plugin.cpp @ 1181:17302d83abfd

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Sample plugin framework to serve static resources
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 30 Sep 2014 14:13:20 +0200
parents
children 6e7e5ed91c2d
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17302d83abfd Sample plugin framework to serve static resources
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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 * Permission is hereby granted, free of charge, to any person
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7 * obtaining a copy of this software and associated documentation
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8 * files (the "Software"), to deal in the Software without
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9 * restriction, including without limitation the rights to use, copy,
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10 * modify, merge, publish, distribute, sublicense, and/or sell copies
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11 * of the Software, and to permit persons to whom the Software is
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12 * furnished to do so, subject to the following conditions:
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13 *
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14 * The above copyright notice and this permission notice shall be
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15 * included in all copies or substantial portions of the Software.
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16 *
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17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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20 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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21 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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22 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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24 * SOFTWARE.
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25 **/
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26
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27
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28 #include "../Configuration.h"
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29
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30 #include <OrthancCPlugin.h>
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31 #include <string>
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32 #include <stdexcept>
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33 #include <algorithm>
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34 #include <sys/stat.h>
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35
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36 #if ORTHANC_PLUGIN_STANDALONE == 1
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37 // This is an auto-generated file for standalone builds
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38 #include <EmbeddedResources.h>
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39 #endif
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40
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41 static OrthancPluginContext* context = NULL;
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42
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43
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44 static const char* GetMimeType(const std::string& path)
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45 {
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46 size_t dot = path.find_last_of('.');
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47
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48 std::string extension = (dot == std::string::npos) ? "" : path.substr(dot);
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49 std::transform(extension.begin(), extension.end(), extension.begin(), tolower);
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50
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51 if (extension == ".html")
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52 {
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53 return "text/html";
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54 }
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55 else if (extension == ".css")
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56 {
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57 return "text/css";
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58 }
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59 else if (extension == ".js")
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60 {
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61 return "application/javascript";
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62 }
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63 else if (extension == ".gif")
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64 {
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65 return "image/gif";
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66 }
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67 else if (extension == ".json")
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68 {
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69 return "application/json";
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70 }
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71 else if (extension == ".xml")
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72 {
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73 return "application/xml";
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74 }
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75 else if (extension == ".png")
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76 {
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77 return "image/png";
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78 }
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79 else if (extension == ".jpg" || extension == ".jpeg")
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80 {
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81 return "image/jpeg";
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82 }
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83 else
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84 {
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85 std::string s = "Unknown MIME type for extension: " + extension;
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86 OrthancPluginLogWarning(context, s.c_str());
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87 return "application/octet-stream";
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88 }
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89 }
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90
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91
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92 static bool ReadFile(std::string& content,
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93 const std::string& path)
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94 {
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95 struct stat s;
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96 if (stat(path.c_str(), &s) != 0 ||
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97 !(s.st_mode & S_IFREG))
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98 {
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99 // Either the path does not exist, or it is not a regular file
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100 return false;
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101 }
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102
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103 FILE* fp = fopen(path.c_str(), "rb");
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104 if (fp == NULL)
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105 {
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106 return false;
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107 }
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108
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109 long size;
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110
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111 if (fseek(fp, 0, SEEK_END) == -1 ||
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112 (size = ftell(fp)) < 0)
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113 {
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114 fclose(fp);
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115 return false;
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116 }
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117
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118 content.resize(size);
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119
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120 if (fseek(fp, 0, SEEK_SET) == -1)
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121 {
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122 fclose(fp);
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123 return false;
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124 }
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125
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126 bool ok = true;
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127
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128 if (size > 0 &&
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129 fread(&content[0], size, 1, fp) != 1)
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130 {
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131 ok = false;
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132 }
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133
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134 fclose(fp);
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135
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136 return ok;
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137 }
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138
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139
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140 #if ORTHANC_PLUGIN_STANDALONE == 1
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141 static int32_t ServeStaticResource(OrthancPluginRestOutput* output,
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142 const char* url,
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143 const OrthancPluginHttpRequest* request)
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144 {
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145 if (request->method != OrthancPluginHttpMethod_Get)
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146 {
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147 OrthancPluginSendMethodNotAllowed(context, output, "GET");
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148 return 0;
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149 }
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150
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151 std::string path = "/" + std::string(request->groups[0]);
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152 const char* mime = GetMimeType(path);
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153
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154 try
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155 {
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156 std::string s;
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157 Orthanc::EmbeddedResources::GetDirectoryResource
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158 (s, Orthanc::EmbeddedResources::STATIC_RESOURCES, path.c_str());
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159
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160 const char* resource = s.size() ? s.c_str() : NULL;
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161 OrthancPluginAnswerBuffer(context, output, resource, s.size(), mime);
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162
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163 return 0;
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164 }
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165 catch (std::runtime_error&)
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166 {
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167 std::string s = "Unknown static resource in plugin: " + std::string(request->groups[0]);
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168 OrthancPluginLogError(context, s.c_str());
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169 OrthancPluginSendHttpStatusCode(context, output, 404);
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170 return 0;
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171 }
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172 }
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173 #endif
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174
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175
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176 #if ORTHANC_PLUGIN_STANDALONE == 0
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177 static int32_t ServeFolder(OrthancPluginRestOutput* output,
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178 const char* url,
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179 const OrthancPluginHttpRequest* request)
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180 {
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181 if (request->method != OrthancPluginHttpMethod_Get)
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182 {
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183 OrthancPluginSendMethodNotAllowed(context, output, "GET");
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184 return 0;
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185 }
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186
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187 std::string path = ORTHANC_PLUGIN_RESOURCES_ROOT "/" + std::string(request->groups[0]);
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188 const char* mime = GetMimeType(path);
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189
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190 std::string s;
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191 if (ReadFile(s, path))
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192 {
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193 const char* resource = s.size() ? s.c_str() : NULL;
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194 OrthancPluginAnswerBuffer(context, output, resource, s.size(), mime);
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195
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196 return 0;
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197 }
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198 else
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199 {
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200 std::string s = "Unknown static resource in plugin: " + std::string(request->groups[0]);
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201 OrthancPluginLogError(context, s.c_str());
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202 OrthancPluginSendHttpStatusCode(context, output, 404);
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203 return 0;
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204 }
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205 }
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206 #endif
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207
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208
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209 static int32_t RedirectRoot(OrthancPluginRestOutput* output,
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210 const char* url,
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211 const OrthancPluginHttpRequest* request)
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212 {
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213 if (request->method != OrthancPluginHttpMethod_Get)
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214 {
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215 OrthancPluginSendMethodNotAllowed(context, output, "GET");
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216 }
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217 else
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218 {
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219 OrthancPluginRedirect(context, output, ORTHANC_PLUGIN_WEB_ROOT "index.html");
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220 }
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221
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222 return 0;
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223 }
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224
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225
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226 extern "C"
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227 {
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228 ORTHANC_PLUGINS_API int32_t OrthancPluginInitialize(OrthancPluginContext* c)
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229 {
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230 context = c;
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231
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232 /* Check the version of the Orthanc core */
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233 if (OrthancPluginCheckVersion(c) == 0)
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234 {
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235 char info[256];
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236 sprintf(info, "Your version of Orthanc (%s) must be above %d.%d.%d to run this plugin",
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237 c->orthancVersion,
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238 ORTHANC_PLUGINS_MINIMAL_MAJOR_NUMBER,
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239 ORTHANC_PLUGINS_MINIMAL_MINOR_NUMBER,
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240 ORTHANC_PLUGINS_MINIMAL_REVISION_NUMBER);
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241 OrthancPluginLogError(context, info);
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242 return -1;
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243 }
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244
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245 /* Register the callbacks */
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246
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247 #if ORTHANC_PLUGIN_STANDALONE == 1
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248 OrthancPluginLogInfo(context, "Serving static resources (standalone build)");
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249 OrthancPluginRegisterRestCallback(context, ORTHANC_PLUGIN_WEB_ROOT "(.*)", ServeStaticResource);
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250 #else
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251 OrthancPluginLogInfo(context, "Serving resources from folder: " ORTHANC_PLUGIN_RESOURCES_ROOT);
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252 OrthancPluginRegisterRestCallback(context, ORTHANC_PLUGIN_WEB_ROOT "(.*)", ServeFolder);
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253 #endif
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254
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255 OrthancPluginRegisterRestCallback(context, "/", RedirectRoot);
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256
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257 return 0;
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258 }
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259
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260
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261 ORTHANC_PLUGINS_API void OrthancPluginFinalize()
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262 {
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263 }
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264
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265
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266 ORTHANC_PLUGINS_API const char* OrthancPluginGetName()
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267 {
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268 return ORTHANC_PLUGIN_NAME;
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269 }
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270
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271
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272 ORTHANC_PLUGINS_API const char* OrthancPluginGetVersion()
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273 {
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274 return ORTHANC_PLUGIN_VERSION;
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275 }
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276 }