/*
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* Nutzerverwaltung - User and role management in your browser
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* Copyright (C) 2011-2016 Ulrich Hilger, http://uhilger.de
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see http://www.gnu.org/licenses/
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*/
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package de.uhilger.um.web;
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import java.io.IOException;
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import javax.servlet.Filter;
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import javax.servlet.FilterChain;
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import javax.servlet.FilterConfig;
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import javax.servlet.ServletException;
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import javax.servlet.ServletRequest;
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import javax.servlet.ServletResponse;
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import javax.servlet.http.HttpServletRequest;
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/**
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* Filter zum Verkuerzen von URLs
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*
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* @author Copyright (c) Ulrich Hilger, http://uhilger.de
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* @author Published under the terms and conditions of the
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* <a href="http://www.gnu.org/licenses/agpl-3.0" target="_blank">GNU Affero
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* General Public License</a>
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*
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* @version 2, February 1, 2017
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*/
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public class NiceFilter implements Filter {
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private static final String ZIEL = "../api?c=de.uhilger.um.api.UserMgr&m=";
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@Override
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public void init(FilterConfig filterConfig) throws ServletException {
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// ...
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}
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/*
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hier wird ein URL wie z.B.
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http]://example.com/um/svc/testmethode
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umgesetzt auf
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http]://example.com/um/api?c=de.uhilger.um.api.UserMgr&m=testmethode
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der Teil 'svc' ist im Filter Mapping des Deployment Descriptor
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deklariert. Der Teil 'api' zeigt mit Hilfe eines Servlet
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Mappings im Deployment Descriptor auf das Transit-Servlet.
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der statische Teil des Ziel-URL ist hier hart kodiert, das kann man
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freilich je nach Bedarf noch dynamisch gestalten
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*/
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@Override
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public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
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if(request instanceof HttpServletRequest) {
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HttpServletRequest hr = (HttpServletRequest) request;
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String servletPath = hr.getServletPath();
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String[] path = servletPath.split("/");
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request.getRequestDispatcher(ZIEL + path[2]).forward(request, response);
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}
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}
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@Override
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public void destroy() {
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// ...
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}
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}
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