pi3httpjsppage.java

mini http server,可以集成嵌入到程序中,实现简单的web功能

/*____________________________________________________________________________*\
 *

 Copyright (c) 1997-2003 John Roy, Holger Zimmermann. All rights reserved.

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 FREE FOR COMMERCIAL AND NON-COMMERCIAL USE
 as long as the following conditions are adhered to.

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    notice, this list of conditions and the following disclaimer. 

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    notice, this list of conditions and the following disclaimer in
    the documentation and/or other materials provided with the
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    derived from this software without specific prior written permission. 

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 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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 *____________________________________________________________________________*|
 *
 * $Source: /cvsroot/pi3web/Pi3Web_200/Source/Servlet/org/pi3/jsp/core/Pi3HttpJspPage.java,v $
 * $Date: 2003/05/13 18:42:20 $
 *
 Description:
	Abstract extension of jsp API HttpJspPage interface, parent of all Pi3Web Jsp's.

\*____________________________________________________________________________*/
 
package org.pi3.jsp.core;

import java.lang.String;
import javax.servlet.Servlet;
import javax.servlet.ServletConfig;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.jsp.HttpJspPage;
import java.io.IOException;

/**
 * This is the interface that a JSP processor-generated class for the
 * HTTP protocol must satisfy.
 */

abstract public class Pi3HttpJspPage implements HttpJspPage {

    private ServletConfig config;

    final public void init(ServletConfig config) throws ServletException {
        this.config = config;
        jspInit();
    }

    final public ServletConfig getServletConfig() {
        return config;
    }

    /* This one is not final so it can be overridden by a more precise method */
    public String getServletInfo() {
        return "Pi3Web superclass for an HTTP JSP";
    }

    final public void destroy() {
        jspDestroy();
    }

    public void jspInit() {}
    public void jspDestroy() {}

    /**
    * The entry point into service, not to be used but abstract method
	* has to be implemented.
    */
    final public void service(ServletRequest req, ServletResponse res)
      throws ServletException, IOException {
        ServletException e = new ServletException(
"Invalid attempt to call method service(ServletRequest req, ServletResponse res).");
        throw e;
    }

    /**
    * The entry point into service, used by Pi3Web.
    */
    final public void service(HttpServletRequest req, HttpServletResponse res)
      throws ServletException, IOException {
        _jspService(req, res);
	}

    /**
    * abstract method to be provided by the JSP processor in the subclass
    * Must be defined in subclass.
    */
    abstract public void _jspService(HttpServletRequest request,
      HttpServletResponse response) throws ServletException, IOException;
}