Mercurial > dive4elements > river
view flys-client/src/main/java/de/intevation/flys/client/server/LoginServlet.java @ 4421:0b0f415203f0
Add new Filter class to change caching
Add new Filter class to avoid caching of GWT nocache files in browsers and http
proxies. The new Filter class NoCacheFilter sets http headers to stop the
proxies and browesers from storing the nocache files.
author | Björn Ricks <bjoern.ricks@intevation.de> |
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date | Tue, 06 Nov 2012 13:32:06 +0100 |
parents | 17fe00c09b7c |
children | 0074c113bb95 |
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package de.intevation.flys.client.server; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.ServletContext; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.apache.log4j.Logger; import de.intevation.flys.client.server.auth.Authentication; import de.intevation.flys.client.server.auth.AuthenticationException; import de.intevation.flys.client.server.auth.AuthenticationFactory; import de.intevation.flys.client.server.auth.User; import de.intevation.flys.client.server.auth.UserClient; import de.intevation.flys.client.server.features.Features; public class LoginServlet extends HttpServlet { private static Logger logger = Logger.getLogger(LoginServlet.class); private void redirectFailure(HttpServletResponse resp, String path) throws IOException { resp.sendRedirect(path + "/login.jsp"); } private void redirectFailure(HttpServletResponse resp, String path, Exception e) throws IOException { this.redirectFailure(resp, path, e.getMessage()); } private void redirectFailure(HttpServletResponse resp, String path, String message) throws IOException { resp.sendRedirect(path + "/login.jsp?error=" + message); } private void redirectSuccess(HttpServletResponse resp, String path, String uri) throws IOException { if (uri == null) { String redirecturl = getServletContext().getInitParameter("redirect-url"); uri = "/" + redirecturl; } resp.sendRedirect(uri); } @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { logger.debug("Processing get request"); this.redirectFailure(resp, req.getContextPath()); } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { String encoding = req.getCharacterEncoding(); String username = req.getParameter("username"); String password = req.getParameter("password"); logger.debug("Processing post request"); if (username == null || password == null) { logger.debug("No username or password provided"); this.redirectFailure(resp, req.getContextPath()); return; } try { Authentication aresp = this.auth(username, password, encoding); if (aresp == null || !aresp.isSuccess()) { logger.debug("Authentication not successful"); this.redirectFailure(resp, req.getContextPath()); } User user = aresp.getUser(); String url = getServletContext().getInitParameter("server-url"); UserClient client = new UserClient(url); if (!client.userExists(user)) { logger.debug("Creating db user"); if (!client.createUser(user)) { this.redirectFailure(resp, req.getContextPath(), "Could not create new user"); } } HttpSession session = req.getSession(); session.setAttribute("user", user); String uri = (String)session.getAttribute("requesturi"); this.redirectSuccess(resp, req.getContextPath(), uri); } catch(AuthenticationException e) { logger.error(e); this.redirectFailure(resp, req.getContextPath(), e); } } private Authentication auth(String username, String password, String encoding) throws AuthenticationException, IOException { ServletContext sc = this.getServletContext(); Features features = (Features)sc.getAttribute(Features.CONTEXT_ATTRIBUTE); String auth = sc.getInitParameter("authentication"); return AuthenticationFactory.getInstance(auth).auth(username, password, encoding, features); } }