errorfilter.java

来自「RESIN 3.2 最新源码」· Java 代码 · 共 79 行

/*
 * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
 *
 * This file is part of Resin(R) Open Source
 *
 * Each copy or derived work must preserve the copyright notice and this
 * notice unmodified.
 *
 * Resin Open Source is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Resin Open Source is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
 * of NON-INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Resin Open Source; if not, write to the
 *   Free SoftwareFoundation, Inc.
 *   59 Temple Place, Suite 330
 *   Boston, MA 02111-1307  USA
 *
 * @author Scott Ferguson
 */

package com.caucho.server.security;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class ErrorFilter implements Filter {
  private FilterConfig _config;
  private int _errorCode;
  private ServletException _exception;

  public void setErrorCode(int code)
  {
    _errorCode = code;
  }

  public void setException(ServletException exception)
  {
    _exception = exception;
  }
  
  public void init(FilterConfig config)
  {
    _config = config;
  }

  public void destroy()
  {
  }

  public void doFilter(ServletRequest request,
                       ServletResponse response,
                       FilterChain chain)
    throws ServletException, IOException
  {
    HttpServletResponse res = (HttpServletResponse) response;

    if (_exception != null)
      throw _exception;
    else if (_errorCode != 0)
      res.sendError(_errorCode, null);
    else
      res.sendError(500, "configuration error");
  }
}