Information About the Server

There are five function to get info on the server

//Return the name of the server
public String ServletRequest.getServerName();

//Return the port number for this request
public int ServletRequest.getServerPort();

//Return name and version of server software
public String ServletContext.getServerInfo();

//Return the value of name server attribute
public Object ServletContext.getAttribute(String name);

The host and port can change for different requests.
The only mandatory attribute is javax.servlet.context.tempdir which is a java.io.File reference to a temp directory.