Quadcap Embeddable Server

com/quadcap/http/server22/HttpDispatcher.java

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package com.quadcap.http.server22;

/* Copyright 1999 - 2003 Quadcap Software.  All rights reserved.
 *
 * This software is distributed under the Quadcap Free Software License.
 * This software may be used or modified for any purpose, personal or
 * commercial.  Open Source redistributions are permitted.  Commercial
 * redistribution of larger works derived from, or works which bundle
 * this software requires a "Commercial Redistribution License"; see
 * http://www.quadcap.com/purchase.
 *
 * Redistributions qualify as "Open Source" under  one of the following terms:
 *   
 *    Redistributions are made at no charge beyond the reasonable cost of
 *    materials and delivery.
 *
 *    Redistributions are accompanied by a copy of the Source Code or by an
 *    irrevocable offer to provide a copy of the Source Code for up to three
 *    years at the cost of materials and delivery.  Such redistributions
 *    must allow further use, modification, and redistribution of the Source
 *    Code under substantially the same terms as this license.
 *
 * Redistributions of source code must retain the copyright notices as they
 * appear in each source code file, these license terms, and the
 * disclaimer/limitation of liability set forth as paragraph 6 below.
 *
 * Redistributions in binary form must reproduce this Copyright Notice,
 * these license terms, and the disclaimer/limitation of liability set
 * forth as paragraph 6 below, in the documentation and/or other materials
 * provided with the distribution.
 *
 * The Software is provided on an "AS IS" basis.  No warranty is
 * provided that the Software is free of defects, or fit for a
 * particular purpose.  
 *
 * Limitation of Liability. Quadcap Software shall not be liable
 * for any damages suffered by the Licensee or any third party resulting
 * from use of the Software.
 */

import java.io.IOException;

import javax.servlet.RequestDispatcher;
import javax.servlet.Servlet;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import com.quadcap.util.Debug;

public class HttpDispatcher implements RequestDispatcher {
    WebApplication                      context;
    WebServlet                          servlet;
    String                              contextPath     = "";
    String                              subPath         = "";
    String                              servletPath     = "";
    String                              pathInfo        = null;

    public HttpDispatcher(WebApplication context, String contextRelativePath) {
        this.context = context;
        this.contextPath = context.getContextPath();
        this.subPath = contextRelativePath;
        this.servletPath = context.resolveDirectory(contextRelativePath);
    }

    public HttpDispatcher(WebServlet servlet, String uri) {
        this.context = servlet.getWebApplication();
        this.servlet = servlet;
        this.contextPath = "";
        this.servletPath = "/servlet/" + uri;
        this.subPath = servletPath;
    }

    public void forward(ServletRequest request, ServletResponse response)
        throws ServletException, IOException
    {
        String p = pathInfo == null ? "" : pathInfo;
        ((HttpRequest)request).setURI(contextPath + servletPath + p);
        if (Trace.level() > 1) {
            Debug.println("[" + context.getRootPath() + "]: forward" +
                          ((HttpRequest)request).getRequestURI());
        }
        ((HttpRequest)request).setRequestDispatcher(this);
        response.reset();
        servlet.service(request, response);
    }


    public void include(ServletRequest request, ServletResponse response)
        throws ServletException, IOException
    {
        String p = pathInfo == null ? "" : pathInfo;
        ((HttpRequest)request).setURI(contextPath + servletPath + p);
        ((HttpRequest)request).setRequestDispatcher(this);
        if (Trace.level() > 1) {
            Debug.println("[" + context.getRootPath() + "]: include" +
                          ((HttpRequest)request).getRequestURI());
        }
        servlet.service(request, response);
    }

    public final void service(ServletRequest request, ServletResponse response)
        throws ServletException, IOException
    {
        if ((subPath.length() == 0 ||
             subPath.charAt(subPath.length()-1) != '/')
            && context.isDirectory(subPath)) {
            // ---- Send a redirect from GET '/foo' to GET '/foo/' if foo is
            // ---- a directory.
            ((HttpResponse)response).sendRedirect(contextPath + subPath + "/");
        } else {
            ((HttpRequest)request).setRequestDispatcher(this);
            servlet.service(request, response);
        }
    }

    public void setServlet(WebServlet servlet, String servletPath) {
        this.servlet = servlet;
        this.servletPath = servletPath;
    }

    public void setContextPath(String path) {
        this.contextPath = contextPath;
    }

    public String getContextPath() {
        return contextPath;
    }

    public String getServletPath() {
        return servletPath;
    }

    void setServletPath(String path) {
        servletPath = path;
    }

    public String getPathInfo() {
        return pathInfo;
    }

    public void setPathInfo(String pathInfo) {
        this.pathInfo = pathInfo;
    }

    public WebApplication getContext() {
        return context;
    }
}