Alternatively to Http.Sys-based Server and Apache-based server, TMS Sparkle also offers an Indy-based server. Indy is an HTTP library for Delphi that fully implements HTTP server. While the http.sys-based server is the recommended option for Sparkle HTTP servers on Windows, and Apache is the option for Linux-based servers - both technologies are solid and proven - Indy-based server has its own usage.
With Indy-based server you can have a stand-alone HTTP server in any platform supported by Delphi, so it's an alternative for example to have a Sparkle HTTP server on Android, or full stand-alone HTTP server on Linux (without installing Apache). For Windows it's still recommended using http.sys as you can also build stand-alone server with it.
To use Indy-based server just instantiates the TIndySparkleHTTPServer (declared in unit Sparkle.Indy.Server) and use the Dispatcher property which is a Sparkle HTTP Dispatcher for you to register Sparkle modules (like XData, RemoteDB, etc.). Here is a code example:
procedure TForm1.FormCreate(Sender: TObject);
Server: = TIndySparkleHTTPServer.Create(Self);
Server.DefaultPort := 8080;
procedure(const C: THttpServerContext)
C.Response.StatusCode := 200;
C.Response.ContentType := 'text/html';
Server.Active := True;
TIndySparkleHttpServer is a TComponent descending from TIdHTTPServer. In the example above it's being created as owned by the Form, so it will be destroyed automatically. You can also simply create with no owner, and then you need to destroy the instance eventually.
Since it descends from TIdHTTPServer, it inherits all its properties and events. The properties DefaultPort and Active used above, for example, are from TIdHTTPServer. It's out of the scope of this documentation to explain full Indy HTTP server usage.