--- /dev/null
+//
+// ========================================================================
+// Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
+// ------------------------------------------------------------------------
+// All rights reserved. This program and the accompanying materials
+// are made available under the terms of the Eclipse Public License v1.0
+// and Apache License v2.0 which accompanies this distribution.
+//
+// The Eclipse Public License is available at
+// http://www.eclipse.org/legal/epl-v10.html
+//
+// The Apache License v2.0 is available at
+// http://www.opensource.org/licenses/apache2.0.php
+//
+// You may elect to redistribute this code under either of these licenses.
+// ========================================================================
+//
+
+package org.eclipse.jetty.servlet;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import javax.servlet.ServletContext;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+
+import org.eclipse.jetty.server.Dispatcher;
+import org.eclipse.jetty.server.handler.ContextHandler;
+import org.eclipse.jetty.server.handler.ErrorHandler;
+
+/* ------------------------------------------------------------ */
+/** Error Page Error Handler
+ *
+ * An ErrorHandler that maps exceptions and status codes to URIs for dispatch using
+ * the internal ERROR style of dispatch.
+ *
+ */
+public class ErrorPageErrorHandler extends ErrorHandler implements ErrorHandler.ErrorPageMapper
+{
+ public final static String GLOBAL_ERROR_PAGE = "org.eclipse.jetty.server.error_page.global";
+
+ protected ServletContext _servletContext;
+ private final Map<String,String> _errorPages= new HashMap<String,String>(); // code or exception to URL
+ private final List<ErrorCodeRange> _errorPageList=new ArrayList<ErrorCodeRange>(); // list of ErrorCode by range
+
+ /* ------------------------------------------------------------ */
+ public ErrorPageErrorHandler()
+ {}
+
+ /* ------------------------------------------------------------ */
+ @Override
+ public String getErrorPage(HttpServletRequest request)
+ {
+ String error_page= null;
+
+ Throwable th= (Throwable)request.getAttribute(Dispatcher.ERROR_EXCEPTION);
+
+ // Walk the cause hierarchy
+ while (error_page == null && th != null )
+ {
+ Class<?> exClass=th.getClass();
+ error_page= (String)_errorPages.get(exClass.getName());
+
+ // walk the inheritance hierarchy
+ while (error_page == null)
+ {
+ exClass= exClass.getSuperclass();
+ if (exClass==null)
+ break;
+ error_page= (String)_errorPages.get(exClass.getName());
+ }
+
+ th=(th instanceof ServletException)?((ServletException)th).getRootCause():null;
+ }
+
+ if (error_page == null)
+ {
+ // look for an exact code match
+ Integer code=(Integer)request.getAttribute(Dispatcher.ERROR_STATUS_CODE);
+ if (code!=null)
+ {
+ error_page= (String)_errorPages.get(Integer.toString(code));
+
+ // if still not found
+ if ((error_page == null) && (_errorPageList != null))
+ {
+ // look for an error code range match.
+ for (int i = 0; i < _errorPageList.size(); i++)
+ {
+ ErrorCodeRange errCode = (ErrorCodeRange) _errorPageList.get(i);
+ if (errCode.isInRange(code))
+ {
+ error_page = errCode.getUri();
+ break;
+ }
+ }
+ }
+ }
+ }
+
+ //try servlet 3.x global error page
+ if (error_page == null)
+ error_page = _errorPages.get(GLOBAL_ERROR_PAGE);
+
+ return error_page;
+ }
+
+
+ /* ------------------------------------------------------------ */
+ /**
+ * @return Returns the errorPages.
+ */
+ public Map<String,String> getErrorPages()
+ {
+ return _errorPages;
+ }
+
+ /* ------------------------------------------------------------ */
+ /**
+ * @param errorPages The errorPages to set. A map of Exception class name or error code as a string to URI string
+ */
+ public void setErrorPages(Map<String,String> errorPages)
+ {
+ _errorPages.clear();
+ if (errorPages!=null)
+ _errorPages.putAll(errorPages);
+ }
+
+ /* ------------------------------------------------------------ */
+ /** Add Error Page mapping for an exception class
+ * This method is called as a result of an exception-type element in a web.xml file
+ * or may be called directly
+ * @param exception The exception
+ * @param uri The URI of the error page.
+ */
+ public void addErrorPage(Class<? extends Throwable> exception,String uri)
+ {
+ _errorPages.put(exception.getName(),uri);
+ }
+
+ /* ------------------------------------------------------------ */
+ /** Add Error Page mapping for an exception class
+ * This method is called as a result of an exception-type element in a web.xml file
+ * or may be called directly
+ * @param exceptionClassName The exception
+ * @param uri The URI of the error page.
+ */
+ public void addErrorPage(String exceptionClassName,String uri)
+ {
+ _errorPages.put(exceptionClassName,uri);
+ }
+
+ /* ------------------------------------------------------------ */
+ /** Add Error Page mapping for a status code.
+ * This method is called as a result of an error-code element in a web.xml file
+ * or may be called directly
+ * @param code The HTTP status code to match
+ * @param uri The URI of the error page.
+ */
+ public void addErrorPage(int code,String uri)
+ {
+ _errorPages.put(Integer.toString(code),uri);
+ }
+
+ /* ------------------------------------------------------------ */
+ /** Add Error Page mapping for a status code range.
+ * This method is not available from web.xml and must be called
+ * directly.
+ * @param from The lowest matching status code
+ * @param to The highest matching status code
+ * @param uri The URI of the error page.
+ */
+ public void addErrorPage(int from, int to, String uri)
+ {
+ _errorPageList.add(new ErrorCodeRange(from, to, uri));
+ }
+
+ /* ------------------------------------------------------------ */
+ @Override
+ protected void doStart() throws Exception
+ {
+ super.doStart();
+ _servletContext=ContextHandler.getCurrentContext();
+ }
+
+ /* ------------------------------------------------------------ */
+ /* ------------------------------------------------------------ */
+ private class ErrorCodeRange
+ {
+ private int _from;
+ private int _to;
+ private String _uri;
+
+ ErrorCodeRange(int from, int to, String uri)
+ throws IllegalArgumentException
+ {
+ if (from > to)
+ throw new IllegalArgumentException("from>to");
+
+ _from = from;
+ _to = to;
+ _uri = uri;
+ }
+
+ boolean isInRange(int value)
+ {
+ if ((value >= _from) && (value <= _to))
+ {
+ return true;
+ }
+
+ return false;
+ }
+
+ String getUri()
+ {
+ return _uri;
+ }
+
+ @Override
+ public String toString()
+ {
+ return "from: " + _from + ",to: " + _to + ",uri: " + _uri;
+ }
+ }
+}
projects / gigi.git / blobdiff