(Information and examples taken from the DroidScript documentation)

The ReadFile method reads a text file from internal or external file storage.

 txt = app.ReadFile( fileName, encoding );

See also WriteFile

function OnStart()
{
  txt = app.ReadFile( "/Sys/Html/Page.htm" );
  app.ShowPopup( txt );
}

Information from: Dave Smart group thread “app.CreateWebServer return file” 04:17