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annotate flys-client/src/main/java/de/intevation/flys/client/server/LoginServlet.java @ 3843:8e169e4e1b57

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Add the official gauge number to the GaugeInfo class flys-client/trunk@5559 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Bjoern Ricks <bjoern.ricks@intevation.de>
date Fri, 21 Sep 2012 14:12:41 +0000
parents 2e12518ff5b4
children a4c9296f6efa
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 {
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54 String encoding = req.getCharacterEncoding();
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55 String username = req.getParameter("username");
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56 String password = req.getParameter("password");
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57
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58 logger.debug("Processing post request");
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59
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60 if (username == null || password == null) {
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61 logger.debug("No username or password provided");
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62 this.redirectFailure(resp);
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63 return;
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64 }
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65
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66 try {
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67 Authentication aresp = this.auth(username, password, encoding);
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68 if (aresp == null || !aresp.isSuccess()) {
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69 logger.debug("Authentication not successful");
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70 this.redirectFailure(resp);
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71 }
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72 User user = aresp.getUser();
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73
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74 String url = getServletContext().getInitParameter("server-url");
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75 UserClient client = new UserClient(url);
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76 if (!client.userExists(user)) {
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77 logger.debug("Creating db user");
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78 if (!client.createUser(user)) {
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79 this.redirectFailure(resp, "Could not create new user");
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80 }
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81 }
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82
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83 HttpSession session = req.getSession();
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84 session.setAttribute("user", user);
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85
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86 String uri = (String)session.getAttribute("requesturi");
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87
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88 this.redirectSuccess(resp, uri);
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89 }
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90 catch(AuthenticationException e) {
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91 logger.error(e);
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92 this.redirectFailure(resp, e);
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93 }
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94 }
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95
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96 private Authentication auth(String username, String password, String encoding)
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97 throws AuthenticationException, IOException
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98 {
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99 ServletContext sc = this.getServletContext();
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100 Features features = (Features)sc.getAttribute(Features.CONTEXT_ATTRIBUTE);
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101 String auth = sc.getInitParameter("authentication");
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102 return AuthenticationFactory.getInstance(auth).auth(username, password, encoding, features);
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103 }
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104 }
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