/**
* Get a parameter from a ServletRequest. Return null if the parameter contains only white spaces.
*/
public static String getParameter(ServletRequest request, String name) {
String s = request.getParameter(name);
if (s == null) {
return null;
}
s = s.trim();
return s.length() == 0 ? null : s;
}
public void service(ServletRequest request, ServletResponse response)
throws ServletException, IOException {
// Get print writer.
PrintWriter pw = response.getWriter();
// Get enumeration of parameter names.
Enumeration e = request.getParameterNames();
// Display parameter names and values.
while (e.hasMoreElements()) {
String pname = (String) e.nextElement();
pw.print(pname + " = ");
String pvalue = request.getParameter(pname);
pw.println(pvalue);
}
pw.close();
}
/**
* @param req Request.
* @return Command.
*/
@Nullable
GridRestCommand command(ServletRequest req) {
String cmd = req.getParameter("cmd");
return cmd == null ? null : GridRestCommand.fromKey(cmd.toLowerCase());
}