| /* |
| * Copyright (c) 2006, 2018 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0, which is available at |
| * http://www.eclipse.org/legal/epl-2.0. |
| * |
| * This Source Code may also be made available under the following Secondary |
| * Licenses when the conditions for such availability set forth in the |
| * Eclipse Public License v. 2.0 are satisfied: GNU General Public License, |
| * version 2 with the GNU Classpath Exception, which is available at |
| * https://www.gnu.org/software/classpath/license.html. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 |
| */ |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.PrintWriter; |
| |
| import jakarta.servlet.ServletException; |
| import jakarta.servlet.http.HttpServlet; |
| import jakarta.servlet.http.HttpServletRequest; |
| import jakarta.servlet.http.HttpServletResponse; |
| |
| public class EchoHeaderServlet extends HttpServlet { |
| private static final long serialVersionUID = 1L; |
| |
| @Override |
| protected void doPost(HttpServletRequest req, HttpServletResponse resp) |
| throws ServletException, IOException { |
| resp.setContentType("text/plain"); |
| PrintWriter pw = resp.getWriter(); |
| // Header not visible yet, body not processed |
| String value = req.getHeader("x-trailer"); |
| if (value == null) { |
| value = "null"; |
| } |
| pw.write(value); |
| |
| // Read the body - quick and dirty |
| InputStream is = req.getInputStream(); |
| int count = 0; |
| while (is.read() > -1) { |
| count++; |
| } |
| |
| pw.write(Integer.valueOf(count).toString()); |
| |
| // Header should be visible now |
| value = req.getHeader("x-trailer"); |
| if (value == null) { |
| value = "null"; |
| } |
| pw.write(value); |
| } |
| } |