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annotate flys-client/src/main/java/de/intevation/flys/client/server/LoginServlet.java @ 4278:efc731efa4a3

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Documentation added.
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Fri, 26 Oct 2012 16:42:51 +0200
parents 17fe00c09b7c
children 0074c113bb95
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 String redirecturl = getServletContext().getInitParameter("redirect-url");
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44
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45 uri = "/" + redirecturl;
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46 }
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47 resp.sendRedirect(uri);
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48 }
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49
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50 @Override
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51 protected void doGet(HttpServletRequest req, HttpServletResponse resp)
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52 throws ServletException, IOException {
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53 logger.debug("Processing get request");
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54 this.redirectFailure(resp, req.getContextPath());
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55 }
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56
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57 @Override
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58 protected void doPost(HttpServletRequest req, HttpServletResponse resp)
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59 throws ServletException, IOException
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60 {
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61 String encoding = req.getCharacterEncoding();
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62 String username = req.getParameter("username");
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63 String password = req.getParameter("password");
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64
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65 logger.debug("Processing post request");
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66
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67 if (username == null || password == null) {
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68 logger.debug("No username or password provided");
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69 this.redirectFailure(resp, req.getContextPath());
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70 return;
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71 }
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72
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73 try {
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74 Authentication aresp = this.auth(username, password, encoding);
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75 if (aresp == null || !aresp.isSuccess()) {
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76 logger.debug("Authentication not successful");
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77 this.redirectFailure(resp, req.getContextPath());
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78 }
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79 User user = aresp.getUser();
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80
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81 String url = getServletContext().getInitParameter("server-url");
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82 UserClient client = new UserClient(url);
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83 if (!client.userExists(user)) {
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84 logger.debug("Creating db user");
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85 if (!client.createUser(user)) {
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86 this.redirectFailure(resp, req.getContextPath(),
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87 "Could not create new user");
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88 }
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89 }
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90
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91 HttpSession session = req.getSession();
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92 session.setAttribute("user", user);
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93
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94 String uri = (String)session.getAttribute("requesturi");
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95
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96 this.redirectSuccess(resp, req.getContextPath(), uri);
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97 }
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98 catch(AuthenticationException e) {
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99 logger.error(e);
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100 this.redirectFailure(resp, req.getContextPath(), e);
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101 }
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102 }
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103
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104 private Authentication auth(String username, String password, String encoding)
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105 throws AuthenticationException, IOException
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106 {
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107 ServletContext sc = this.getServletContext();
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108 Features features = (Features)sc.getAttribute(Features.CONTEXT_ATTRIBUTE);
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109 String auth = sc.getInitParameter("authentication");
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110 return AuthenticationFactory.getInstance(auth).auth(username, password, encoding, features);
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111 }
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112 }
http://dive4elements.wald.intevation.org