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annotate flys-client/src/main/java/de/intevation/flys/client/server/LoginServlet.java @ 4154:92021091b03d

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Avoid another possible NullPointerException in GaugeTree
author Björn Ricks <bjoern.ricks@intevation.de>
date Tue, 16 Oct 2012 14:42:51 +0200
parents a4c9296f6efa
children 17fe00c09b7c
rev   line source
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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, String path)
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26 throws IOException {
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27 resp.sendRedirect(path + "/login.jsp");
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28 }
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29
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30 private void redirectFailure(HttpServletResponse resp, String path,
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31 Exception e) throws IOException {
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32 this.redirectFailure(resp, path, e.getMessage());
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33 }
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34
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35 private void redirectFailure(HttpServletResponse resp, String path,
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36 String message) throws IOException {
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37 resp.sendRedirect(path + "/login.jsp?error=" + message);
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38 }
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39
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40 private void redirectSuccess(HttpServletResponse resp, String path,
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41 String uri) throws IOException {
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42 if (uri == null) {
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43 uri = path + "/FLYS.html";
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44 }
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45 resp.sendRedirect(uri);
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46 }
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47
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48 @Override
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49 protected void doGet(HttpServletRequest req, HttpServletResponse resp)
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50 throws ServletException, IOException {
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51 logger.debug("Processing get request");
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52 this.redirectFailure(resp, req.getContextPath());
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53 }
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54
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55 @Override
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56 protected void doPost(HttpServletRequest req, HttpServletResponse resp)
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57 throws ServletException, IOException
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58 {
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59 String encoding = req.getCharacterEncoding();
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60 String username = req.getParameter("username");
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61 String password = req.getParameter("password");
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62
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63 logger.debug("Processing post request");
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64
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65 if (username == null || password == null) {
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66 logger.debug("No username or password provided");
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67 this.redirectFailure(resp, req.getContextPath());
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68 return;
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69 }
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70
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71 try {
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72 Authentication aresp = this.auth(username, password, encoding);
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73 if (aresp == null || !aresp.isSuccess()) {
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74 logger.debug("Authentication not successful");
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75 this.redirectFailure(resp, req.getContextPath());
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76 }
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77 User user = aresp.getUser();
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78
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79 String url = getServletContext().getInitParameter("server-url");
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80 UserClient client = new UserClient(url);
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81 if (!client.userExists(user)) {
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82 logger.debug("Creating db user");
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83 if (!client.createUser(user)) {
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84 this.redirectFailure(resp, req.getContextPath(),
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85 "Could not create new user");
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86 }
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87 }
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88
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89 HttpSession session = req.getSession();
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90 session.setAttribute("user", user);
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91
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92 String uri = (String)session.getAttribute("requesturi");
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93
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94 this.redirectSuccess(resp, req.getContextPath(), uri);
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95 }
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96 catch(AuthenticationException e) {
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97 logger.error(e);
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98 this.redirectFailure(resp, req.getContextPath(), e);
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99 }
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100 }
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101
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102 private Authentication auth(String username, String password, String encoding)
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103 throws AuthenticationException, IOException
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104 {
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105 ServletContext sc = this.getServletContext();
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106 Features features = (Features)sc.getAttribute(Features.CONTEXT_ATTRIBUTE);
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107 String auth = sc.getInitParameter("authentication");
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108 return AuthenticationFactory.getInstance(auth).auth(username, password, encoding, features);
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109 }
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110 }
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