1 /*
2 * Copyright (c) 2002-2017, Mairie de Paris
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright notice
10 * and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright notice
13 * and the following disclaimer in the documentation and/or other materials
14 * provided with the distribution.
15 *
16 * 3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 *
32 * License 1.0
33 */
34 package fr.paris.lutece.plugins.mylutece.modules.cas.web;
35
36 import javax.servlet.http.HttpServletRequest;
37 import javax.servlet.http.HttpSession;
38
39 import org.jasig.cas.client.authentication.DefaultGatewayResolverImpl;
40 import org.jasig.cas.client.authentication.GatewayResolver;
41
42 /**
43 * This class is similar to the DefaultGatewayResolverImpl, but it adds a parameter
44 * on the query string to be able to detect browsers with cookies disabled.
45 * When cookies are disabled, an attribute is set on the request so that subsequent
46 * treatments are able to act on that (display an error message, for instance)
47 */
48 public class ParameterGatewayResolver implements GatewayResolver {
49
50 public static final String PARAM_GATEWAY = "g";
51 public static final String ATTR_SUPPORTS_COOKIES = "mylutece-cas.supports-cookies";
52 private static final String PARAM_YES = "yes";
53
54 @Override
55 public boolean hasGatewayedAlready( HttpServletRequest request,
56 String serviceUrl )
57 {
58 final HttpSession session = request.getSession( false );
59
60 if ( session == null )
61 {
62 if ( request.getParameter( PARAM_GATEWAY ) != null )
63 {
64 // we were gatewayed, but it was not stored in the session
65 // cookies must be blocked
66 request.setAttribute( ATTR_SUPPORTS_COOKIES, Boolean.FALSE );
67 return true;
68 }
69 return false;
70 }
71
72 final boolean result = session.getAttribute( DefaultGatewayResolverImpl.CONST_CAS_GATEWAY ) != null;
73 session.removeAttribute( DefaultGatewayResolverImpl.CONST_CAS_GATEWAY );
74
75 if ( result )
76 {
77 session.setAttribute( ATTR_SUPPORTS_COOKIES, Boolean.TRUE );
78 }
79
80 return result;
81 }
82
83 @Override
84 public String storeGatewayInformation( HttpServletRequest request,
85 String serviceUrl )
86 {
87 HttpSession session = request.getSession( true );
88 session.setAttribute( DefaultGatewayResolverImpl.CONST_CAS_GATEWAY, PARAM_YES );
89 if ( session.getAttribute( ATTR_SUPPORTS_COOKIES ) == null )
90 {
91 return serviceUrl + (serviceUrl.indexOf( "?" ) != -1 ? "&" : "?" ) + PARAM_GATEWAY + "=t";
92 }
93 return serviceUrl;
94 }
95
96 }