001/* 002 * (C) Copyright 2006-2007 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * Jean-Marc Orliaguet, Chalmers 018 * 019 * $Id$ 020 */ 021 022package org.nuxeo.theme.html.servlets; 023 024import java.io.IOException; 025 026import javax.servlet.http.Cookie; 027import javax.servlet.http.HttpServlet; 028import javax.servlet.http.HttpServletRequest; 029import javax.servlet.http.HttpServletResponse; 030 031public final class NegotiationSelector extends HttpServlet { 032 033 private static final long serialVersionUID = 1L; 034 035 @Override 036 protected void doGet(final HttpServletRequest request, final HttpServletResponse response) throws IOException { 037 doPost(request, response); 038 } 039 040 @Override 041 protected void doPost(final HttpServletRequest request, final HttpServletResponse response) throws IOException { 042 043 final String referrer = request.getHeader("referer"); 044 if (referrer == null) { 045 response.getWriter().write("no referrer found"); 046 return; 047 } 048 049 final String engine = request.getParameter("engine"); 050 if (engine != null) { 051 response.addCookie(createCookie("nxthemes.engine", engine)); 052 } 053 054 final String mode = request.getParameter("mode"); 055 if (mode != null) { 056 response.addCookie(createCookie("nxthemes.mode", mode)); 057 } 058 059 final String theme = request.getParameter("theme"); 060 if (theme != null) { 061 response.addCookie(createCookie("nxthemes.theme", theme)); 062 } 063 064 final String perspective = request.getParameter("perspective"); 065 if (perspective != null) { 066 response.addCookie(createCookie("nxthemes.perspective", perspective)); 067 } 068 069 response.sendRedirect(referrer); 070 } 071 072 private Cookie createCookie(final String name, final String value) { 073 final Cookie cookie = new Cookie(name, value); 074 075 // remove the cookie of the value is an empty string 076 if (value.equals("")) { 077 cookie.setMaxAge(0); 078 } 079 cookie.setPath("/"); 080 return cookie; 081 } 082}