1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19 package org.eclipse.jetty.servlet;
20
21 import java.util.ArrayList;
22 import java.util.HashMap;
23 import java.util.List;
24 import java.util.Map;
25
26 import javax.servlet.ServletContext;
27 import javax.servlet.ServletException;
28 import javax.servlet.http.HttpServletRequest;
29
30 import org.eclipse.jetty.server.Dispatcher;
31 import org.eclipse.jetty.server.handler.ContextHandler;
32 import org.eclipse.jetty.server.handler.ErrorHandler;
33
34
35
36
37
38
39
40
41 public class ErrorPageErrorHandler extends ErrorHandler implements ErrorHandler.ErrorPageMapper
42 {
43 public final static String GLOBAL_ERROR_PAGE = "org.eclipse.jetty.server.error_page.global";
44
45 protected ServletContext _servletContext;
46 private final Map<String,String> _errorPages= new HashMap<String,String>();
47 private final List<ErrorCodeRange> _errorPageList=new ArrayList<ErrorCodeRange>();
48
49
50 public ErrorPageErrorHandler()
51 {}
52
53
54 @Override
55 public String getErrorPage(HttpServletRequest request)
56 {
57 String error_page= null;
58
59 Throwable th= (Throwable)request.getAttribute(Dispatcher.ERROR_EXCEPTION);
60
61
62 while (error_page == null && th != null )
63 {
64 Class<?> exClass=th.getClass();
65 error_page= (String)_errorPages.get(exClass.getName());
66
67
68 while (error_page == null)
69 {
70 exClass= exClass.getSuperclass();
71 if (exClass==null)
72 break;
73 error_page= (String)_errorPages.get(exClass.getName());
74 }
75
76 th=(th instanceof ServletException)?((ServletException)th).getRootCause():null;
77 }
78
79 if (error_page == null)
80 {
81
82 Integer code=(Integer)request.getAttribute(Dispatcher.ERROR_STATUS_CODE);
83 if (code!=null)
84 {
85 error_page= (String)_errorPages.get(Integer.toString(code));
86
87
88 if ((error_page == null) && (_errorPageList != null))
89 {
90
91 for (int i = 0; i < _errorPageList.size(); i++)
92 {
93 ErrorCodeRange errCode = (ErrorCodeRange) _errorPageList.get(i);
94 if (errCode.isInRange(code))
95 {
96 error_page = errCode.getUri();
97 break;
98 }
99 }
100 }
101 }
102 }
103
104
105 if (error_page == null)
106 error_page = _errorPages.get(GLOBAL_ERROR_PAGE);
107
108 return error_page;
109 }
110
111
112
113
114
115
116 public Map<String,String> getErrorPages()
117 {
118 return _errorPages;
119 }
120
121
122
123
124
125 public void setErrorPages(Map<String,String> errorPages)
126 {
127 _errorPages.clear();
128 if (errorPages!=null)
129 _errorPages.putAll(errorPages);
130 }
131
132
133
134
135
136
137
138
139 public void addErrorPage(Class<? extends Throwable> exception,String uri)
140 {
141 _errorPages.put(exception.getName(),uri);
142 }
143
144
145
146
147
148
149
150
151 public void addErrorPage(String exceptionClassName,String uri)
152 {
153 _errorPages.put(exceptionClassName,uri);
154 }
155
156
157
158
159
160
161
162
163 public void addErrorPage(int code,String uri)
164 {
165 _errorPages.put(Integer.toString(code),uri);
166 }
167
168
169
170
171
172
173
174
175
176 public void addErrorPage(int from, int to, String uri)
177 {
178 _errorPageList.add(new ErrorCodeRange(from, to, uri));
179 }
180
181
182 @Override
183 protected void doStart() throws Exception
184 {
185 super.doStart();
186 _servletContext=ContextHandler.getCurrentContext();
187 }
188
189
190
191 private class ErrorCodeRange
192 {
193 private int _from;
194 private int _to;
195 private String _uri;
196
197 ErrorCodeRange(int from, int to, String uri)
198 throws IllegalArgumentException
199 {
200 if (from > to)
201 throw new IllegalArgumentException("from>to");
202
203 _from = from;
204 _to = to;
205 _uri = uri;
206 }
207
208 boolean isInRange(int value)
209 {
210 if ((value >= _from) && (value <= _to))
211 {
212 return true;
213 }
214
215 return false;
216 }
217
218 String getUri()
219 {
220 return _uri;
221 }
222
223 @Override
224 public String toString()
225 {
226 return "from: " + _from + ",to: " + _to + ",uri: " + _uri;
227 }
228 }
229 }