<%@ page import="java.util.Enumeration" %> <%@page contentType="text/html; charset=UTF-8" pageEncoding="utf-8" trimDirectiveWhitespaces="true"%> <% Enumeration names = request.getHeaderNames(); while (names.hasMoreElements()) { String name = names.nextElement(); out.println(name + ": " + request.getHeader(name)); } %> --------- request.getScheme(): <%=request.getScheme()%>