Mercurial > hg > orthanc

annotate Plugins/Samples/ServeFolders/Plugin.cpp @ 1843:d10a8164da5f

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ensure images returned to plugins are writable
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 30 Nov 2015 13:50:21 +0100
parents 77c4cc4def0f
children b1291df2f780
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2015 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, 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 * This program is distributed in the hope that it will be useful, but
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12 * WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 * General Public License for more details.
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15 *
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16 * You should have received a copy of the GNU General Public License
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17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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18 **/
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19
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20
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21 #include <orthanc/OrthancCPlugin.h>
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22
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23 #include <json/reader.h>
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24 #include <json/value.h>
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25 #include <boost/filesystem.hpp>
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26
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27
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28 static OrthancPluginContext* context_ = NULL;
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29 static std::map<std::string, std::string> folders_;
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30 static const char* INDEX_URI = "/app/plugin-serve-folders.html";
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31
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32
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33 static const char* GetMimeType(const std::string& path)
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34 {
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35 size_t dot = path.find_last_of('.');
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36
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37 std::string extension = (dot == std::string::npos) ? "" : path.substr(dot);
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38 std::transform(extension.begin(), extension.end(), extension.begin(), tolower);
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39
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40 if (extension == ".html")
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41 {
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42 return "text/html";
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43 }
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44 else if (extension == ".css")
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45 {
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46 return "text/css";
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47 }
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48 else if (extension == ".js")
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49 {
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50 return "application/javascript";
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51 }
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52 else if (extension == ".gif")
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53 {
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54 return "image/gif";
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55 }
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56 else if (extension == ".svg")
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57 {
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58 return "image/svg+xml";
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59 }
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60 else if (extension == ".json")
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61 {
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62 return "application/json";
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63 }
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64 else if (extension == ".xml")
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65 {
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66 return "application/xml";
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67 }
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68 else if (extension == ".png")
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69 {
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70 return "image/png";
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71 }
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72 else if (extension == ".jpg" || extension == ".jpeg")
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73 {
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74 return "image/jpeg";
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75 }
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76 else if (extension == ".woff")
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77 {
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78 return "application/x-font-woff";
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79 }
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80 else
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81 {
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82 std::string s = "Unknown MIME type for extension: " + extension;
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83 OrthancPluginLogWarning(context_, s.c_str());
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84 return "application/octet-stream";
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85 }
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86 }
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87
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88
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89 static bool ReadFile(std::string& target,
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90 const std::string& path)
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91 {
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92 OrthancPluginMemoryBuffer buffer;
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93 if (OrthancPluginReadFile(context_, &buffer, path.c_str()))
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94 {
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95 return false;
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96 }
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97 else
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98 {
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99 target.assign(reinterpret_cast<const char*>(buffer.data), buffer.size);
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100 OrthancPluginFreeMemoryBuffer(context_, &buffer);
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101 return true;
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102 }
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103 }
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104
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105
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106 static bool ReadConfiguration(Json::Value& configuration,
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107 OrthancPluginContext* context)
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108 {
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109 std::string s;
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110
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111 {
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112 char* tmp = OrthancPluginGetConfiguration(context);
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113 if (tmp == NULL)
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114 {
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115 OrthancPluginLogError(context, "Error while retrieving the configuration from Orthanc");
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116 return false;
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117 }
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118
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119 s.assign(tmp);
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120 OrthancPluginFreeString(context, tmp);
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121 }
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122
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123 Json::Reader reader;
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124 if (reader.parse(s, configuration))
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125 {
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126 return true;
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127 }
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128 else
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129 {
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130 OrthancPluginLogError(context, "Unable to parse the configuration");
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131 return false;
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132 }
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133 }
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134
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135
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136
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137 static bool LookupFolder(std::string& folder,
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138 OrthancPluginRestOutput* output,
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139 const OrthancPluginHttpRequest* request)
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140 {
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141 const std::string uri = request->groups[0];
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142
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143 std::map<std::string, std::string>::const_iterator found = folders_.find(uri);
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144 if (found == folders_.end())
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145 {
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146 std::string s = "Unknown URI in plugin server-folders: " + uri;
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147 OrthancPluginLogError(context_, s.c_str());
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148 OrthancPluginSendHttpStatusCode(context_, output, 404);
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149 return false;
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150 }
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151 else
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152 {
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153 folder = found->second;
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154 return true;
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155 }
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156 }
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157
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158
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159 static OrthancPluginErrorCode FolderCallback(OrthancPluginRestOutput* output,
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160 const char* url,
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161 const OrthancPluginHttpRequest* request)
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162 {
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163 namespace fs = boost::filesystem;
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164
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165 if (request->method != OrthancPluginHttpMethod_Get)
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166 {
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167 OrthancPluginSendMethodNotAllowed(context_, output, "GET");
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168 return OrthancPluginErrorCode_Success;
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169 }
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170
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171 std::string folder;
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172
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173 if (LookupFolder(folder, output, request))
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174 {
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175 const fs::path item(request->groups[1]);
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176 const fs::path parent((fs::path(folder) / item).parent_path());
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177
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178 if (item.filename().string() == "index.html" &&
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179 fs::is_directory(parent) &&
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180 !fs::is_regular_file(fs::path(folder) / item))
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181 {
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182 // On-the-fly generation of an "index.html"
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183 std::string s;
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184 s += "<html>\n";
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185 s += " <body>\n";
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186 s += " <ul>\n";
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187
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188 fs::directory_iterator end;
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189
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190 for (fs::directory_iterator it(parent) ; it != end; ++it)
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191 {
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192 if (fs::is_directory(it->status()))
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193 {
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194 std::string f = it->path().filename().string();
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195 s += " <li><a href=\"" + f + "/index.html\">" + f + "/</a></li>\n";
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196 }
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197 }
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198
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199 for (fs::directory_iterator it(parent) ; it != end; ++it)
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200 {
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201 if (fs::is_regular_file(it->status()))
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202 {
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203 std::string f = it->path().filename().string();
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204 s += " <li><a href=\"" + f + "\">" + f + "</a></li>\n";
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205 }
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206 }
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207
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208 s += " </ul>\n";
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209 s += " </body>\n";
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210 s += "</html>\n";
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211
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212 OrthancPluginAnswerBuffer(context_, output, s.c_str(), s.size(), "text/html");
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213 }
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214 else
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215 {
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216 std::string path = folder + "/" + item.string();
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217 const char* mime = GetMimeType(path);
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218
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219 std::string s;
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220 if (ReadFile(s, path))
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221 {
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222 const char* resource = s.size() ? s.c_str() : NULL;
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223 OrthancPluginAnswerBuffer(context_, output, resource, s.size(), mime);
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224 }
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225 else
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226 {
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227 std::string s = "Inexistent file in served folder: " + path;
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228 OrthancPluginLogError(context_, s.c_str());
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229 OrthancPluginSendHttpStatusCode(context_, output, 404);
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230 }
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231 }
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232 }
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233
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234 return OrthancPluginErrorCode_Success;
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235 }
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236
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237
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238 static OrthancPluginErrorCode ListServedFolders(OrthancPluginRestOutput* output,
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239 const char* url,
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240 const OrthancPluginHttpRequest* request)
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241 {
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242 if (request->method != OrthancPluginHttpMethod_Get)
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243 {
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244 OrthancPluginSendMethodNotAllowed(context_, output, "GET");
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245 return OrthancPluginErrorCode_Success;
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246 }
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247
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248 std::string s = "<html><body><h1>Additional folders served by Orthanc</h1>\n";
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249
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250 if (folders_.empty())
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251 {
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252 s += "<p>Empty section <tt>ServeFolders</tt> in your configuration file: No additional folder is served.</p>\n";
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253 }
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254 else
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255 {
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256 s += "<ul>\n";
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257 for (std::map<std::string, std::string>::const_iterator
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258 it = folders_.begin(); it != folders_.end(); ++it)
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259 {
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260 // The URI is relative to INDEX_URI ("/app/plugin-serve-folders.html")
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261 s += "<li><a href=\"../" + it->first + "/index.html\">" + it->first + "</li>\n";
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262 }
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263
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264 s += "</ul>\n";
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265 }
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266
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267 s += "</body></html>\n";
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268
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269 OrthancPluginAnswerBuffer(context_, output, s.c_str(), s.size(), "text/html");
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270
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271 return OrthancPluginErrorCode_Success;
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272 }
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273
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274
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275 extern "C"
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276 {
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277 ORTHANC_PLUGINS_API int32_t OrthancPluginInitialize(OrthancPluginContext* context)
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278 {
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279 context_ = context;
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280
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281 /* Check the version of the Orthanc core */
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282 if (OrthancPluginCheckVersion(context_) == 0)
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283 {
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284 char info[1024];
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285 sprintf(info, "Your version of Orthanc (%s) must be above %d.%d.%d to run this plugin",
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286 context_->orthancVersion,
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287 ORTHANC_PLUGINS_MINIMAL_MAJOR_NUMBER,
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288 ORTHANC_PLUGINS_MINIMAL_MINOR_NUMBER,
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289 ORTHANC_PLUGINS_MINIMAL_REVISION_NUMBER);
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290 OrthancPluginLogError(context_, info);
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291 return -1;
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292 }
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293
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294 OrthancPluginSetDescription(context_, "Serve additional folders with the HTTP server of Orthanc.");
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295
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296 Json::Value configuration;
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297 if (!ReadConfiguration(configuration, context_))
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298 {
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299 return -1;
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300 }
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301
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302 if (configuration.isMember("ServeFolders"))
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303 {
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304 if (configuration["ServeFolders"].type() != Json::objectValue)
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305 {
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306 OrthancPluginLogError(context_, "The \"ServeFolders\" configuration section is badly formatted (must be a JSON object)");
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307 return -1;
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308 }
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309 }
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310 else
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311 {
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312 OrthancPluginLogWarning(context_, "No section \"ServeFolders\" in your configuration file: "
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313 "No additional folder will be served!");
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314 configuration["ServeFolders"] = Json::objectValue;
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315 }
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316
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317
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318 Json::Value::Members members = configuration["ServeFolders"].getMemberNames();
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319
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320 // Register the callback for each base URI
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321 for (Json::Value::Members::const_iterator
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322 it = members.begin(); it != members.end(); ++it)
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323 {
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324 std::string baseUri = *it;
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325
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326 // Remove the heading and trailing slashes in the root URI, if any
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327 while (!baseUri.empty() &&
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328 *baseUri.begin() == '/')
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329 {
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330 baseUri = baseUri.substr(1);
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331 }
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332
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333 while (!baseUri.empty() &&
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334 *baseUri.rbegin() == '/')
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335 {
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336 baseUri.resize(baseUri.size() - 1);
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337 }
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338
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339 if (baseUri.empty())
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340 {
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341 OrthancPluginLogError(context_, "The URI of a folder to be served cannot be empty");
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342 return -1;
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343 }
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344
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345 // Check whether the source folder exists and is indeed a directory
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346 const std::string folder = configuration["ServeFolders"][*it].asString();
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347 if (!boost::filesystem::is_directory(folder))
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348 {
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349 std::string msg = "Trying and serve an inexistent folder: " + folder;
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350 OrthancPluginLogError(context_, msg.c_str());
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351 return -1;
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352 }
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353
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354 folders_[baseUri] = folder;
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355
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356 // Register the callback to serve the folder
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357 {
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358 const std::string regex = "/(" + baseUri + ")/(.*)";
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359 OrthancPluginRegisterRestCallback(context, regex.c_str(), FolderCallback);
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360 }
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361 }
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362
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363 OrthancPluginRegisterRestCallback(context, INDEX_URI, ListServedFolders);
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364 OrthancPluginSetRootUri(context, INDEX_URI);
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365
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366 return 0;
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367 }
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368
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369
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370 ORTHANC_PLUGINS_API void OrthancPluginFinalize()
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371 {
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372 }
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373
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374
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375 ORTHANC_PLUGINS_API const char* OrthancPluginGetName()
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376 {
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377 return "serve-folders";
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378 }
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diff changeset
379
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diff changeset
380
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diff changeset
381 ORTHANC_PLUGINS_API const char* OrthancPluginGetVersion()
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diff changeset
382 {
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383 return SERVE_FOLDERS_VERSION;
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384 }
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385 }