server.cxx

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/// \file
/// \ingroup tutorial_webgui
///  This program demonstrates minimal server/client code for working with RWebWindow class
///  File server.cxx shows how RWebWindow can be created and used
///  In client.html simple client code is provided.
///
/// \macro_code
///
/// \author Sergey Linev
 
#include <ROOT/RWebWindow.hxx>
 
std::shared_ptr<ROOT::RWebWindow> window;
 
int counter{0};
 
void ProcessData(unsigned connid, const std::string &arg)
{
   printf("Get msg %s \n", arg.c_str());
 
   counter++;
 
   if (arg == "get_text") {
      // send arbitrary text message
      window->Send(connid, TString::Format("Message%d", counter).Data());
   } else if (arg == "get_binary") {
      // send float array as binary
      float arr[10];
      for (int n = 0; n < 10; ++n)
         arr[n] = counter;
      window->SendBinary(connid, arr, sizeof(arr));
   } else if (arg == "halt") {
      // terminate ROOT
      window->TerminateROOT();
   }
}
 
void server()
{
   // create window
   window = ROOT::RWebWindow::Create();
 
   // Detect macro file location to specify full path to the HTML file
   std::string fname = __FILE__;
   auto pos = fname.find("server.cxx");
   if (pos > 0)
      fname.resize(pos);
   else
      fname.clear();
   fname.append("client.html");
 
   // configure default html page
   // either HTML code can be specified or just name of file after 'file:' prefix
   window->SetDefaultPage("file:" + fname);
 
   // this is call-back, invoked when message received from client
   window->SetDataCallBack(ProcessData);
 
   window->SetGeometry(300, 500); // configure predefined geometry
 
   window->Show();
}