import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
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:");
out.println();
Enumeration enum = req.getHeaderNames();
while (enum.hasMoreElements()) {
String name = (String) enum.nextElement();
String value = req.getHeader(name);
if (value != null) {
out.println(name + ": " + value);
}
}
}
}
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