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annotate Plugins/Samples/ServeFolders/Plugin.cpp @ 3751:89bd08fdd91b

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 16 Mar 2020 11:22:56 +0100
parents 94f4a18a79cc
children
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
1900
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2020 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU General Public License as
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9 * published by the Free Software Foundation, either version 3 of the
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10 * License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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22 #include "../Common/OrthancPluginCppWrapper.h"
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23
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24 #include <json/reader.h>
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25 #include <json/value.h>
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26 #include <boost/filesystem.hpp>
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27 #include <boost/date_time/posix_time/posix_time.hpp>
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29
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30 #if HAS_ORTHANC_EXCEPTION == 1
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31 # error The macro HAS_ORTHANC_EXCEPTION must be set to 0 to compile this plugin
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32 #endif
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33
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35
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36 static std::map<std::string, std::string> extensions_;
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37 static std::map<std::string, std::string> folders_;
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38 static const char* INDEX_URI = "/app/plugin-serve-folders.html";
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39 static bool allowCache_ = false;
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40 static bool generateETag_ = true;
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41
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42
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43 static void SetHttpHeaders(OrthancPluginRestOutput* output)
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44 {
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45 if (!allowCache_)
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46 {
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47 // http://stackoverflow.com/a/2068407/881731
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48 OrthancPluginContext* context = OrthancPlugins::GetGlobalContext();
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49 OrthancPluginSetHttpHeader(context, output, "Cache-Control", "no-cache, no-store, must-revalidate");
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50 OrthancPluginSetHttpHeader(context, output, "Pragma", "no-cache");
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51 OrthancPluginSetHttpHeader(context, output, "Expires", "0");
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52 }
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53 }
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55
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56 static void RegisterDefaultExtensions()
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57 {
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58 extensions_["css"] = "text/css";
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59 extensions_["gif"] = "image/gif";
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60 extensions_["html"] = "text/html";
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61 extensions_["jpeg"] = "image/jpeg";
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62 extensions_["jpg"] = "image/jpeg";
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63 extensions_["js"] = "application/javascript";
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64 extensions_["json"] = "application/json";
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65 extensions_["nexe"] = "application/x-nacl";
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66 extensions_["nmf"] = "application/json";
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67 extensions_["pexe"] = "application/x-pnacl";
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68 extensions_["png"] = "image/png";
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69 extensions_["svg"] = "image/svg+xml";
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70 extensions_["wasm"] = "application/wasm";
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71 extensions_["woff"] = "application/x-font-woff";
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72 extensions_["xml"] = "application/xml";
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73 }
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74
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75
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76 static std::string GetMimeType(const std::string& path)
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77 {
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78 size_t dot = path.find_last_of('.');
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79
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80 std::string extension = (dot == std::string::npos) ? "" : path.substr(dot + 1);
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81 std::transform(extension.begin(), extension.end(), extension.begin(), tolower);
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82
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83 std::map<std::string, std::string>::const_iterator found = extensions_.find(extension);
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84
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85 if (found != extensions_.end() &&
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86 !found->second.empty())
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87 {
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88 return found->second;
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89 }
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90 else
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91 {
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92 OrthancPlugins::LogWarning("ServeFolders: Unknown MIME type for extension \"" + extension + "\"");
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93 return "application/octet-stream";
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94 }
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95 }
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96
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97
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98 static bool LookupFolder(std::string& folder,
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99 OrthancPluginRestOutput* output,
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100 const OrthancPluginHttpRequest* request)
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101 {
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102 const std::string uri = request->groups[0];
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103
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104 std::map<std::string, std::string>::const_iterator found = folders_.find(uri);
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105 if (found == folders_.end())
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106 {
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107 OrthancPlugins::LogError("Unknown URI in plugin server-folders: " + uri);
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108 OrthancPluginSendHttpStatusCode(OrthancPlugins::GetGlobalContext(), output, 404);
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109 return false;
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110 }
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111 else
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112 {
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113 folder = found->second;
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114 return true;
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115 }
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116 }
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117
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118
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119 static void Answer(OrthancPluginRestOutput* output,
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120 const char* content,
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121 size_t size,
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122 const std::string& mime)
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123 {
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124 if (generateETag_)
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125 {
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126 OrthancPlugins::OrthancString md5;
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127 md5.Assign(OrthancPluginComputeMd5(OrthancPlugins::GetGlobalContext(), content, size));
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128
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129 std::string etag = "\"" + std::string(md5.GetContent()) + "\"";
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130 OrthancPluginSetHttpHeader(OrthancPlugins::GetGlobalContext(), output, "ETag", etag.c_str());
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131 }
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132
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133 SetHttpHeaders(output);
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134 OrthancPluginAnswerBuffer(OrthancPlugins::GetGlobalContext(), output, content, size, mime.c_str());
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135 }
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136
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137
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138 void ServeFolder(OrthancPluginRestOutput* output,
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139 const char* url,
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140 const OrthancPluginHttpRequest* request)
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141 {
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142 namespace fs = boost::filesystem;
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143
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144 if (request->method != OrthancPluginHttpMethod_Get)
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145 {
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146 OrthancPluginSendMethodNotAllowed(OrthancPlugins::GetGlobalContext(), output, "GET");
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147 return;
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148 }
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149
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150 std::string folder;
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151
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152 if (LookupFolder(folder, output, request))
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153 {
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154 const fs::path item(request->groups[1]);
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155 const fs::path parent((fs::path(folder) / item).parent_path());
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156
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157 if (item.filename().string() == "index.html" &&
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158 fs::is_directory(parent) &&
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159 !fs::is_regular_file(fs::path(folder) / item))
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160 {
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161 // On-the-fly generation of an "index.html"
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162 std::string s;
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163 s += "<html>\n";
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164 s += " <body>\n";
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165 s += " <ul>\n";
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166
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167 fs::directory_iterator end;
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168
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169 for (fs::directory_iterator it(parent) ; it != end; ++it)
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170 {
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171 if (fs::is_directory(it->status()))
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172 {
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173 std::string f = it->path().filename().string();
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174 s += " <li><a href=\"" + f + "/index.html\">" + f + "/</a></li>\n";
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175 }
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176 }
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177
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178 for (fs::directory_iterator it(parent) ; it != end; ++it)
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179 {
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180 fs::file_type type = it->status().type();
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181
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182 if (type == fs::regular_file ||
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183 type == fs::reparse_file) // cf. BitBucket issue #11
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184 {
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185 std::string f = it->path().filename().string();
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186 s += " <li><a href=\"" + f + "\">" + f + "</a></li>\n";
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187 }
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188 }
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189
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190 s += " </ul>\n";
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191 s += " </body>\n";
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192 s += "</html>\n";
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193
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194 Answer(output, s.c_str(), s.size(), "text/html");
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195 }
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196 else
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197 {
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198 std::string path = folder + "/" + item.string();
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199 std::string mime = GetMimeType(path);
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200
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201 OrthancPlugins::MemoryBuffer content;
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202
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203 try
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204 {
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205 content.ReadFile(path);
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206 }
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207 catch (...)
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208 {
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209 ORTHANC_PLUGINS_THROW_EXCEPTION(InexistentFile);
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210 }
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211
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212 boost::posix_time::ptime lastModification =
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213 boost::posix_time::from_time_t(fs::last_write_time(path));
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214 std::string t = boost::posix_time::to_iso_string(lastModification);
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215 OrthancPluginSetHttpHeader(OrthancPlugins::GetGlobalContext(),
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216 output, "Last-Modified", t.c_str());
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217
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218 Answer(output, content.GetData(), content.GetSize(), mime);
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219 }
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220 }
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221 }
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222
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223
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224 void ListServedFolders(OrthancPluginRestOutput* output,
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225 const char* url,
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226 const OrthancPluginHttpRequest* request)
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227 {
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228 if (request->method != OrthancPluginHttpMethod_Get)
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229 {
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230 OrthancPluginSendMethodNotAllowed(OrthancPlugins::GetGlobalContext(), output, "GET");
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231 return;
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232 }
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233
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234 std::string s = "<html><body><h1>Additional folders served by Orthanc</h1>\n";
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235
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236 if (folders_.empty())
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237 {
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238 s += "<p>Empty section <tt>ServeFolders</tt> in your configuration file: No additional folder is served.</p>\n";
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239 }
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240 else
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241 {
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242 s += "<ul>\n";
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243 for (std::map<std::string, std::string>::const_iterator
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244 it = folders_.begin(); it != folders_.end(); ++it)
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245 {
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246 // The URI is relative to INDEX_URI ("/app/plugin-serve-folders.html")
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247 s += "<li><a href=\"../" + it->first + "/index.html\">" + it->first + "</li>\n";
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248 }
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249
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250 s += "</ul>\n";
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251 }
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252
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253 s += "</body></html>\n";
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254
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255 Answer(output, s.c_str(), s.size(), "text/html");
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256 }
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257
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258
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259 static void ConfigureFolders(const Json::Value& folders)
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260 {
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261 if (folders.type() != Json::objectValue)
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262 {
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263 OrthancPlugins::LogError("The list of folders to be served is badly formatted (must be a JSON object)");
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264 ORTHANC_PLUGINS_THROW_EXCEPTION(BadFileFormat);
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265 }
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266
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267 Json::Value::Members members = folders.getMemberNames();
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268
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269 // Register the callback for each base URI
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270 for (Json::Value::Members::const_iterator
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271 it = members.begin(); it != members.end(); ++it)
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272 {
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273 if (folders[*it].type() != Json::stringValue)
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274 {
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275 OrthancPlugins::LogError("The folder to be served \"" + *it +
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276 "\" must be associated with a string value (its mapped URI)");
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277 ORTHANC_PLUGINS_THROW_EXCEPTION(BadFileFormat);
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278 }
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279
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280 std::string baseUri = *it;
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281
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282 // Remove the heading and trailing slashes in the root URI, if any
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283 while (!baseUri.empty() &&
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284 *baseUri.begin() == '/')
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285 {
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286 baseUri = baseUri.substr(1);
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287 }
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288
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289 while (!baseUri.empty() &&
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290 *baseUri.rbegin() == '/')
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291 {
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292 baseUri.resize(baseUri.size() - 1);
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293 }
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294
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295 if (baseUri.empty())
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296 {
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297 OrthancPlugins::LogError("The URI of a folder to be served cannot be empty");
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298 ORTHANC_PLUGINS_THROW_EXCEPTION(BadFileFormat);
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299 }
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300
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301 // Check whether the source folder exists and is indeed a directory
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302 const std::string folder = folders[*it].asString();
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303 if (!boost::filesystem::is_directory(folder))
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304 {
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305 OrthancPlugins::LogError("Trying to serve an inexistent folder: " + folder);
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306 ORTHANC_PLUGINS_THROW_EXCEPTION(InexistentFile);
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307 }
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308
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309 folders_[baseUri] = folder;
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310
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311 // Register the callback to serve the folder
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312 {
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313 const std::string regex = "/(" + baseUri + ")/(.*)";
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314 OrthancPlugins::RegisterRestCallback<ServeFolder>(regex.c_str(), true);
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315 }
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316 }
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317 }
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318
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319
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320 static void ConfigureExtensions(const Json::Value& extensions)
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321 {
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322 if (extensions.type() != Json::objectValue)
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323 {
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324 OrthancPlugins::LogError("The list of extensions is badly formatted (must be a JSON object)");
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325 ORTHANC_PLUGINS_THROW_EXCEPTION(BadFileFormat);
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326 }
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327
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328 Json::Value::Members members = extensions.getMemberNames();
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329
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330 for (Json::Value::Members::const_iterator
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331 it = members.begin(); it != members.end(); ++it)
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332 {
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333 if (extensions[*it].type() != Json::stringValue)
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334 {
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335 OrthancPlugins::LogError("The file extension \"" + *it +
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336 "\" must be associated with a string value (its MIME type)");
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337 ORTHANC_PLUGINS_THROW_EXCEPTION(BadFileFormat);
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338 }
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339
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340 const std::string& mime = extensions[*it].asString();
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341
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342 std::string name = *it;
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343
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344 if (!name.empty() &&
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345 name[0] == '.')
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346 {
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347 name = name.substr(1); // Remove the leading dot "."
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348 }
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349
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350 extensions_[name] = mime;
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351
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352 if (mime.empty())
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353 {
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354 OrthancPlugins::LogWarning("ServeFolders: Removing MIME type for file extension \"." +
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355 name + "\"");
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356 }
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357 else
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358 {
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359 OrthancPlugins::LogWarning("ServeFolders: Associating file extension \"." + name +
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360 "\" with MIME type \"" + mime + "\"");
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361 }
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362 }
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363 }
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364
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365
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366 static void ReadConfiguration()
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367 {
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368 OrthancPlugins::OrthancConfiguration configuration;
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369
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370 {
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371 OrthancPlugins::OrthancConfiguration globalConfiguration;
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372 globalConfiguration.GetSection(configuration, "ServeFolders");
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373 }
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374
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375 if (!configuration.IsSection("Folders"))
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376 {
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377 // This is a basic configuration
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378 ConfigureFolders(configuration.GetJson());
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379 }
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380 else
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381 {
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382 // This is an advanced configuration
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383 ConfigureFolders(configuration.GetJson()["Folders"]);
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384
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385 bool tmp;
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386
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387 if (configuration.LookupBooleanValue(tmp, "AllowCache"))
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388 {
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389 allowCache_ = tmp;
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390 OrthancPlugins::LogWarning("ServeFolders: Requesting the HTTP client to " +
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391 std::string(tmp ? "enable" : "disable") +
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392 " its caching mechanism");
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393 }
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394
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395 if (configuration.LookupBooleanValue(tmp, "GenerateETag"))
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396 {
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397 generateETag_ = tmp;
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398 OrthancPlugins::LogWarning("ServeFolders: The computation of an ETag for the "
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399 "served resources is " +
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400 std::string(tmp ? "enabled" : "disabled"));
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401 }
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402
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403 OrthancPlugins::OrthancConfiguration extensions;
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404 configuration.GetSection(extensions, "Extensions");
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405 ConfigureExtensions(extensions.GetJson());
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406 }
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407
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408 if (folders_.empty())
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409 {
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410 OrthancPlugins::LogWarning("ServeFolders: Empty configuration file: "
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411 "No additional folder will be served!");
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412 }
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413 }
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414
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415
1322
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416 extern "C"
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417 {
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418 ORTHANC_PLUGINS_API int32_t OrthancPluginInitialize(OrthancPluginContext* context)
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419 {
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420 OrthancPlugins::SetGlobalContext(context);
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421
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422 /* Check the version of the Orthanc core */
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423 if (OrthancPluginCheckVersion(context) == 0)
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424 {
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425 OrthancPlugins::ReportMinimalOrthancVersion(ORTHANC_PLUGINS_MINIMAL_MAJOR_NUMBER,
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426 ORTHANC_PLUGINS_MINIMAL_MINOR_NUMBER,
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427 ORTHANC_PLUGINS_MINIMAL_REVISION_NUMBER);
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428 return -1;
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429 }
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430
2166
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431 RegisterDefaultExtensions();
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432 OrthancPluginSetDescription(context, "Serve additional folders with the HTTP server of Orthanc.");
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433 OrthancPluginSetRootUri(context, INDEX_URI);
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434 OrthancPlugins::RegisterRestCallback<ListServedFolders>(INDEX_URI, true);
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435
2167
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436 try
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5a92665dee23 Sample plugin: Serve folders
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diff changeset
437 {
2167
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438 ReadConfiguration();
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439 }
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440 catch (OrthancPlugins::PluginException& e)
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441 {
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442 OrthancPlugins::LogError("Error while initializing the ServeFolders plugin: " +
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443 std::string(e.What(context)));
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5a92665dee23 Sample plugin: Serve folders
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444 }
5a92665dee23 Sample plugin: Serve folders
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445
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446 return 0;
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447 }
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diff changeset
448
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449
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450 ORTHANC_PLUGINS_API void OrthancPluginFinalize()
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451 {
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452 }
f497a72d9f71 fixes to the sample plugins
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parents:
diff changeset
453
f497a72d9f71 fixes to the sample plugins
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parents:
diff changeset
454
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diff changeset
455 ORTHANC_PLUGINS_API const char* OrthancPluginGetName()
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456 {
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457 return "serve-folders";
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458 }
f497a72d9f71 fixes to the sample plugins
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parents:
diff changeset
459
f497a72d9f71 fixes to the sample plugins
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parents:
diff changeset
460
f497a72d9f71 fixes to the sample plugins
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diff changeset
461 ORTHANC_PLUGINS_API const char* OrthancPluginGetVersion()
f497a72d9f71 fixes to the sample plugins
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diff changeset
462 {
1391
b3119c32c920 version in ServerFolders plugin
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diff changeset
463 return SERVE_FOLDERS_VERSION;
1322
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464 }
f497a72d9f71 fixes to the sample plugins
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465 }