An HTTP servlet handles standard HTTP requests. Although HydraExpress contains a generic servlet class, in practice, most servlets provide Web services or deliver content to Web browsers. Therefore, most servlets derive from rwsf::HttpServlet.

The HelloWorldExample servlet receives an HTTP GET request from a client and returns a fixed response. The sample below shows the outline of the HelloWorldExample servlet class, without methods which are discussed in “Implementing Request Handlers” .