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1
23
24 package org.infoglue.deliver.applications.filters;
25
26 import java.io.IOException  ;
27 import java.net.URLDecoder ;
28 import java.util.ArrayList ;
29 import java.util.List ;
30 import java.util.StringTokenizer ;
31
32 import javax.servlet.Filter ;
33 import javax.servlet.FilterChain ;
34 import javax.servlet.FilterConfig ;
35 import javax.servlet.ServletException ;
36 import javax.servlet.ServletRequest ;
37 import javax.servlet.ServletResponse ;
38 import javax.servlet.http.HttpServletRequest ;
39 import javax.servlet.http.HttpServletResponse ;
40
41 import org.apache.log4j.Logger;
42 import org.infoglue.cms.controllers.kernel.impl.simple.RedirectController;
43 import org.infoglue.cms.exception.SystemException;
44
45
50
51 public class RedirectFilter implements Filter
52 {
53 public final static Logger logger = Logger.getLogger(RedirectFilter.class.getName());
54
55 private static String FILTER_URIS_PARAMETER = "FilterURIs";
56
57 private FilterConfig filterConfig = null;
58 private URIMatcher uriMatcher = null;
59
60
61 public void init(FilterConfig filterConfig) throws ServletException
62 {
63 this.filterConfig = filterConfig;
64 String filterURIs = filterConfig.getInitParameter(FILTER_URIS_PARAMETER);
65 uriMatcher = URIMatcher.compilePatterns(splitString(filterURIs, ","), false);
66 }
67
68 public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException , ServletException
69 {
70 long end, start = System.currentTimeMillis();
71 HttpServletRequest httpRequest = (HttpServletRequest ) servletRequest;
72 HttpServletResponse httpResponse = (HttpServletResponse ) servletResponse;
73 String requestURL = httpRequest.getRequestURL().toString();
75
76 logger.info("Redirect filter requestURL:" + requestURL);
77
78
79 try
80 {
81 String requestURI = URLDecoder.decode(getContextRelativeURI(httpRequest), "UTF-8");
82
83 if (!uriMatcher.matches(requestURI))
84 {
85 try
86 {
87 String redirectUrl = RedirectController.getController().getRedirectUrl(httpRequest);
88 if(redirectUrl != null && redirectUrl.length() > 0)
89 {
90 httpResponse.sendRedirect(redirectUrl);
91 return;
92 }
93 }
94 catch (SystemException se)
95 {
96 logger.warn("Error in redirect filter: " + se.getMessage(), se);
97 httpRequest.setAttribute("responseCode", "500");
98 httpRequest.setAttribute("error", se);
99 httpRequest.getRequestDispatcher("/ErrorPage.action").forward(httpRequest, httpResponse);
100 }
101 catch (Exception e)
102 {
103 logger.warn("Error in redirect filter: " + e.getMessage(), e);
104 httpRequest.setAttribute("responseCode", "404");
105 httpRequest.setAttribute("error", e);
106 httpRequest.getRequestDispatcher("/ErrorPage.action").forward(httpRequest, httpResponse);
107 }
108 }
109 }
110 catch (Exception e)
111 {
112 logger.error("RedirectFilter threw error:" + e.getMessage(), e);
113 }
114
115 filterChain.doFilter(httpRequest, httpResponse);
116
117 }
118
119 public void destroy()
120 {
121 this.filterConfig = null;
122 }
123
124
125 private String getContextRelativeURI(HttpServletRequest request) {
127 String requestURI = request.getRequestURI();
128 String contextPath = request.getContextPath();
129 if (contextPath != null && requestURI.length() > 0) {
130 requestURI = requestURI.substring(contextPath.length(), requestURI.length());
131 }
132 if (requestURI.length() == 0)
133 return "/";
134 return requestURI;
135 }
136
137 private String [] splitString(String str, String delimiter) {
138 List list = new ArrayList ();
139 StringTokenizer st = new StringTokenizer (str, delimiter);
140 while (st.hasMoreTokens()) {
141 String t = st.nextToken();
143 if (t.startsWith("_")) {
144 break;
145 } else {
146 list.add(t.trim());
148 }
149 }
150 return (String []) list.toArray(new String [list.size()]);
151 }
152
153
154 } |
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