--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OrthancFramework/Sources/TemporaryFile.cpp	Wed Jun 10 20:30:34 2020 +0200
@@ -0,0 +1,140 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2020 Osimis S.A., Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * In addition, as a special exception, the copyright holders of this
+ * program give permission to link the code of its release with the
+ * OpenSSL project's "OpenSSL" library (or with modified versions of it
+ * that use the same license as the "OpenSSL" library), and distribute
+ * the linked executables. You must obey the GNU General Public License
+ * in all respects for all of the code used other than "OpenSSL". If you
+ * modify file(s) with this exception, you may extend this exception to
+ * your version of the file(s), but you are not obligated to do so. If
+ * you do not wish to do so, delete this exception statement from your
+ * version. If you delete this exception statement from all source files
+ * in the program, then also delete it here.
+ * 
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#include "PrecompiledHeaders.h"
+#include "TemporaryFile.h"
+
+#include "OrthancException.h"
+#include "SystemToolbox.h"
+#include "Toolbox.h"
+
+#include <boost/filesystem.hpp>
+
+namespace Orthanc
+{
+  static std::string CreateTemporaryPath(const char* temporaryDirectory,
+                                         const char* extension)
+  {
+    boost::filesystem::path dir;
+
+    if (temporaryDirectory == NULL)
+    {
+#if BOOST_HAS_FILESYSTEM_V3 == 1
+      dir = boost::filesystem::temp_directory_path();
+#elif defined(__linux__)
+      dir = "/tmp";
+#else
+#  error Support your platform here
+#endif
+    }
+    else
+    {
+      dir = temporaryDirectory;
+    }
+
+    // We use UUID to create unique path to temporary files
+    const std::string uuid = Orthanc::Toolbox::GenerateUuid();
+
+    // New in Orthanc 1.5.8: Prefix the process ID to the name of the
+    // temporary files, in order to locate orphan temporary files that
+    // were left by instances of Orthanc that exited in non-clean way
+    // https://groups.google.com/d/msg/orthanc-users/MSJX53bw6Lw/d3S3lRRLAwAJ
+    std::string filename = "Orthanc-" + boost::lexical_cast<std::string>(SystemToolbox::GetProcessId()) + "-" + uuid;
+
+    if (extension != NULL)
+    {
+      filename.append(extension);
+    }
+
+    dir /= filename;
+    return dir.string();
+  }
+
+
+  TemporaryFile::TemporaryFile() : 
+    path_(CreateTemporaryPath(NULL, NULL))
+  {
+  }
+
+
+  TemporaryFile::TemporaryFile(const std::string& temporaryDirectory,
+                               const std::string& extension) :
+    path_(CreateTemporaryPath(temporaryDirectory.c_str(), extension.c_str()))
+  {
+  }
+
+
+  TemporaryFile::~TemporaryFile()
+  {
+    boost::filesystem::remove(path_);
+  }
+
+
+  void TemporaryFile::Write(const std::string& content)
+  {
+    try
+    {
+      SystemToolbox::WriteFile(content, path_);
+    }
+    catch (OrthancException& e)
+    {
+      throw OrthancException(e.GetErrorCode(),
+                             "Can't create temporary file \"" + path_ +
+                             "\" with " + boost::lexical_cast<std::string>(content.size()) +
+                             " bytes: Check you have write access to the "
+                             "temporary directory and that it is not full");
+    }
+  }
+
+
+  void TemporaryFile::Read(std::string& content) const
+  {
+    try
+    {
+      SystemToolbox::ReadFile(content, path_);
+    }
+    catch (OrthancException& e)
+    {
+      throw OrthancException(e.GetErrorCode(),
+                             "Can't read temporary file \"" + path_ +
+                             "\": Another process has corrupted the temporary directory");
+    }
+  }
+
+
+  void TemporaryFile::Touch()
+  {
+    std::string empty;
+    Write(empty);
+  }
+}