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annotate flys-client/src/main/java/de/intevation/flys/client/server/LoginServlet.java @ 3510:abc5957bfe1c

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First i18n strings for logo-stuff in charts. flys-client/trunk@5280 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Tue, 28 Aug 2012 13:14:03 +0000
parents 56f17c6c6288
children a050cb5f303f
rev   line source
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192eddbbd4cf Implement a login page to be able to authenticate a user
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1 package de.intevation.flys.client.server;
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2
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3 import java.io.IOException;
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4
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5 import javax.servlet.ServletException;
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6 import javax.servlet.ServletContext;
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7 import javax.servlet.http.HttpServlet;
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8 import javax.servlet.http.HttpServletRequest;
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9 import javax.servlet.http.HttpServletResponse;
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10 import javax.servlet.http.HttpSession;
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11
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12 import org.apache.log4j.Logger;
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13
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14 import de.intevation.flys.client.server.auth.Authentication;
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15 import de.intevation.flys.client.server.auth.AuthenticationException;
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16 import de.intevation.flys.client.server.auth.AuthenticationFactory;
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17 import de.intevation.flys.client.server.auth.User;
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18 import de.intevation.flys.client.server.auth.UserClient;
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19 import de.intevation.flys.client.server.features.Features;
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20
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21 public class LoginServlet extends HttpServlet {
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22
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23 private static Logger logger = Logger.getLogger(LoginServlet.class);
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24
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25 private void redirectFailure(HttpServletResponse resp) throws IOException {
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26 resp.sendRedirect("/login.jsp");
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27 }
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28
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29 private void redirectFailure(HttpServletResponse resp, Exception e) throws IOException {
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30 this.redirectFailure(resp, e.getMessage());
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31 }
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32
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33 private void redirectFailure(HttpServletResponse resp, String message) throws IOException {
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34 resp.sendRedirect("/login.jsp?error=" + message);
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35 }
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36 private void redirectSuccess(HttpServletResponse resp, String uri) throws IOException {
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37 if (uri == null) {
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38 uri = "/FLYS.html";
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39 }
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40 resp.sendRedirect(uri);
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41 }
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42
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43 @Override
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44 protected void doGet(HttpServletRequest req, HttpServletResponse resp)
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45 throws ServletException, IOException {
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46 logger.debug("Processing get request");
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47 this.redirectFailure(resp);
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48 }
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49
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50 @Override
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51 protected void doPost(HttpServletRequest req, HttpServletResponse resp)
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52 throws ServletException, IOException {
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53 String encoding = req.getCharacterEncoding();
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54 String username = req.getParameter("username");
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55 String password = req.getParameter("password");
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56
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57 logger.debug("Processing post request");
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58
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59 if (username == null || password == null) {
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60 logger.debug("No username or password provided");
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61 this.redirectFailure(resp);
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62 }
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63 try {
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64 Authentication aresp = this.auth(username, password, encoding);
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65 if (aresp == null || !aresp.isSuccess()) {
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66 logger.debug("Athentication not successful");
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67 this.redirectFailure(resp);
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68 }
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69 User user = aresp.getUser();
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70
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71 String url = getServletContext().getInitParameter("server-url");
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72 UserClient client = new UserClient(url);
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73 if (!client.userExists(user)) {
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74 logger.debug("Creating db user");
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75 if (!client.createUser(user)) {
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76 this.redirectFailure(resp, "Could not create new user");
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77 }
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78 }
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79
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80 HttpSession session = req.getSession();
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81 session.setAttribute("user", user);
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82
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83 String uri = (String)session.getAttribute("requesturi");
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84
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85 this.redirectSuccess(resp, uri);
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86 }
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87 catch(AuthenticationException e) {
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88 logger.error(e);
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89 this.redirectFailure(resp, e);
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90 }
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91 }
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92
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93 private Authentication auth(String username, String password, String encoding)
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94 throws AuthenticationException, IOException {
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95 ServletContext sc = this.getServletContext();
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96 Features features = (Features)sc.getAttribute(Features.CONTEXT_ATTRIBUTE);
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97 String auth = sc.getInitParameter("authentication");
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98 return AuthenticationFactory.getInstance(auth).auth(username, password, encoding, features);
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99 }
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100 }
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