HeaderSnoop.java Source code

Introduction

Here is the source code for HeaderSnoop.java

Source

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Enumeration;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class HeaderSnoop extends HttpServlet {

    public void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
        res.setContentType("text/plain");
        PrintWriter out = res.getWriter();

        out.println("Request Headers:");
        Enumeration names = req.getHeaderNames();
        while (names.hasMoreElements()) {
            String name = (String) names.nextElement();
            Enumeration values = req.getHeaders(name); // support multiple values
            if (values != null) {
                while (values.hasMoreElements()) {
                    String value = (String) values.nextElement();
                    out.println(name + ": " + value);
                }
            }
        }
    }
}