Mercurial > dive4elements > river

annotate gwt-client/src/main/java/org/dive4elements/river/client/server/filter/GGInAFilter.java @ 5861:172338b1407f

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GWT client: Added copyright header.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 28 Apr 2013 14:30:15 +0200
parents 5aa05a7a34b7
children 1b939742629e
rev   line source
5861
172338b1407f GWT client: Added copyright header.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 5838
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.client.server.filter;
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10
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11 import org.dive4elements.river.client.server.auth.Authentication;
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12 import org.dive4elements.river.client.server.auth.AuthenticationException;
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13 import org.dive4elements.river.client.server.auth.AuthenticationFactory;
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14 import org.dive4elements.river.client.server.auth.User;
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15 import org.dive4elements.river.client.server.features.Features;
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16
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17 import java.io.IOException;
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18 import java.net.InetAddress;
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19 import java.net.UnknownHostException;
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20 import java.util.Enumeration;
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21
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22 import javax.servlet.Filter;
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23 import javax.servlet.FilterChain;
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24 import javax.servlet.FilterConfig;
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25 import javax.servlet.ServletContext;
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26 import javax.servlet.ServletException;
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27 import javax.servlet.ServletRequest;
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28 import javax.servlet.ServletResponse;
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29 import javax.servlet.http.HttpServletRequest;
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30 import javax.servlet.http.HttpServletResponse;
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31 import javax.servlet.http.HttpSession;
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32
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33 import org.apache.log4j.Logger;
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34
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35
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36 /** ServletFilter used for GGInA authentification and certain authorisation. */
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37 public class GGInAFilter implements Filter {
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38
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39 /** Private logger. */
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40 private static Logger logger = Logger.getLogger(GGInAFilter.class);
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41
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42 private boolean deactivate = false;
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43 private String authmethod;
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44 private String redirecturl;
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45 private ServletContext sc;
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46
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47 private static final String LOGIN_JSP = "/login.jsp";
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48 private static final String LOGIN_SERVLET = "/flys/login";
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49 private static final String FLYS_CSS = "/FLYS.css";
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50
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51
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52 /**
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53 * Initialize.
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54 *
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55 * Read FilterConfig parameter deactivate
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56 */
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57 @Override
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58 public void init(FilterConfig config)
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59 throws ServletException
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60 {
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61 String deactivate = config.getInitParameter("deactivate");
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62 this.sc = config.getServletContext();
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63 logger.debug("GGInAFilter context " + this.sc.getContextPath());
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64 this.authmethod = sc.getInitParameter("authentication");
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65 this.redirecturl = sc.getInitParameter("redirect-url");
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66 if (deactivate != null && deactivate.equalsIgnoreCase("true")) {
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67 this.deactivate = true;
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68 }
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69
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70 }
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71
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72
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73 /**
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74 * Called when filter in chain invoked.
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75 * @param req request to servlet
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76 * @param resp response of servlet
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77 * @param chain the filter chain
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78 */
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79 @Override
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80 public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain)
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81 throws IOException, ServletException
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82 {
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83 if (this.deactivate) {
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84 logger.debug("GGinAFilter is deactivated");
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85 chain.doFilter(req, resp);
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86 return;
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87 }
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88
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89 HttpServletRequest sreq = (HttpServletRequest) req;
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90
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91 String requesturi = sreq.getRequestURI();
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92 if (logger.isDebugEnabled()) {
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93 for (Enumeration e = req.getAttributeNames() ; e.hasMoreElements() ;) {
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94 logger.debug(e.nextElement());
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95 }
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96 }
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97
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98 logger.debug("Request for: " + requesturi);
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99
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100 // Allow access to localhost
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101 if (isLocalAddress(req)) {
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102 logger.debug("Request to localhost");
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103 chain.doFilter(req, resp);
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104 return;
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105 }
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106
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107 // Allow access to login pages
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108 String path = this.sc.getContextPath();
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109 if (requesturi.equals(path + LOGIN_JSP)
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110 || requesturi.equals(path + LOGIN_SERVLET)
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111 || requesturi.equals(path + FLYS_CSS)) {
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112 logger.debug("Request for login " + requesturi);
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113 chain.doFilter(req, resp);
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114 return;
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115 }
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116
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117 boolean redirect = false;
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118
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119 HttpSession session = sreq.getSession();
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120
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121 String uri = path + "/" + this.redirecturl;
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122
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123 /* Redirect if uri is root or redirecturl */
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124 if (requesturi.equals(uri) || requesturi.equals(path + "/")) {
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125 redirect = true;
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126 }
9fca4d60fb7c Reintroduce wrongly outbacked changes (rev 4418-4425).
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127
4651
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128 String queryString = sreq.getQueryString();
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129
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130 if (queryString != null) {
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131 uri += "?" + queryString;
4436
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132 }
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133 session.setAttribute("requesturi", uri);
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134
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135 User user = (User)session.getAttribute("user");
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136 if (user == null) {
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137 logger.debug("No user in session: " + requesturi);
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138 this.handleResponse(resp, redirect);
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139 return;
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140 }
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141 if (user.hasExpired()) {
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142 // try to re-authenticate the user
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143 logger.debug("User ticket has expired: " + requesturi);
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144 String encoding = sreq.getCharacterEncoding();
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145 try {
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146 Authentication auth = this.auth(user, encoding);
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147 if (auth == null || !auth.isSuccess()) {
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148 logger.debug("Re-athentication not successful");
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149 this.handleResponse(resp, redirect);
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150 }
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151 }
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152 catch(AuthenticationException e) {
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153 logger.error("Failure during re-authentication", e);
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154 this.handleResponse(resp, redirect);
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155 return;
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156 }
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157 }
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158
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159 chain.doFilter(req, resp);
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160 return;
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161 }
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162
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163 private void redirect(ServletResponse resp) throws IOException {
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164 logger.debug("Redirect to login");
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165 ((HttpServletResponse) resp).sendRedirect(this.sc.getContextPath() +
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166 "/login.jsp");
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167 }
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168
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169 private void sendNotAuthenticated(ServletResponse resp) throws IOException {
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170 logger.debug("Send not authenticated");
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171 ((HttpServletResponse)resp).sendError(HttpServletResponse.SC_FORBIDDEN, "User not authenticated");
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172 }
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173
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174 private void handleResponse(ServletResponse resp, boolean redirect) throws IOException {
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175 if (redirect) {
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176 this.redirect(resp);
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177 }
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178 else {
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179 this.sendNotAuthenticated(resp);
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180 }
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181 }
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182
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183
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184 /**
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185 * Do nothing at destruction.
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186 */
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187 @Override
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188 public void destroy() {
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189 }
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190
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191 private Authentication auth(User user, String encoding)
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192 throws AuthenticationException, IOException {
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diff changeset
193 Features features = (Features)sc.getAttribute(Features.CONTEXT_ATTRIBUTE);
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194 return AuthenticationFactory.getInstance(this.authmethod).auth(
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diff changeset
195 user.getName(), user.getPassword(), encoding, features);
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196 }
4549
9a2432485371 Allow requests from localhost in GGInA filter
Björn Ricks <bjoern.ricks@intevation.de>
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diff changeset
197
9a2432485371 Allow requests from localhost in GGInA filter
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diff changeset
198 /**
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199 * Returns true if the request is from our machine
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200 * @param req The ServletRequest
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diff changeset
201 * @return true if the request is from a loopback interface or from one of
9a2432485371 Allow requests from localhost in GGInA filter
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parents: 4436
diff changeset
202 * the interface addresses of the machine
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diff changeset
203 */
9a2432485371 Allow requests from localhost in GGInA filter
Björn Ricks <bjoern.ricks@intevation.de>
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diff changeset
204 private boolean isLocalAddress(ServletRequest req) {
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Björn Ricks <bjoern.ricks@intevation.de>
parents: 4436
diff changeset
205 try {
9a2432485371 Allow requests from localhost in GGInA filter
Björn Ricks <bjoern.ricks@intevation.de>
parents: 4436
diff changeset
206 InetAddress addr = InetAddress.getByName(req.getRemoteAddr());
9a2432485371 Allow requests from localhost in GGInA filter
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parents: 4436
diff changeset
207 return addr.isAnyLocalAddress() || addr.isLoopbackAddress();
9a2432485371 Allow requests from localhost in GGInA filter
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parents: 4436
diff changeset
208 } catch (UnknownHostException e) {
9a2432485371 Allow requests from localhost in GGInA filter
Björn Ricks <bjoern.ricks@intevation.de>
parents: 4436
diff changeset
209 logger.error(e, e);
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parents: 4436
diff changeset
210 return false;
9a2432485371 Allow requests from localhost in GGInA filter
Björn Ricks <bjoern.ricks@intevation.de>
parents: 4436
diff changeset
211 }
9a2432485371 Allow requests from localhost in GGInA filter
Björn Ricks <bjoern.ricks@intevation.de>
parents: 4436
diff changeset
212 }
4436
9fca4d60fb7c Reintroduce wrongly outbacked changes (rev 4418-4425).
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parents:
diff changeset
213 }
9fca4d60fb7c Reintroduce wrongly outbacked changes (rev 4418-4425).
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parents:
diff changeset
214 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org