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/*
* Copyright (C) 2009-2010, Google Inc.
* and other copyright owners as documented in the project's IP log.
*
* This program and the accompanying materials are made available
* under the terms of the Eclipse Distribution License v1.0 which
* accompanies this distribution, is reproduced below, and is
* available at http://www.eclipse.org/org/documents/edl-v10.php
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* - Neither the name of the Eclipse Foundation, Inc. nor the
* names of its contributors may be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.eclipse.jgit.http.server.glue;
import static javax.servlet.http.HttpServletResponse.SC_NOT_FOUND;
import java.io.IOException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Generic container servlet to manage routing to different pipelines.
* <p>
* Callers can create and configure a new processing pipeline by using one of
* the {@link #serve(String)} or {@link #serveRegex(String)} methods to allocate
* a binder for a particular URL pattern.
* <p>
* Registered filters and servlets are initialized lazily, usually during the
* first request. Once initialized the bindings in this servlet cannot be
* modified without destroying the servlet and thereby destroying all registered
* filters and servlets.
*/
public class MetaServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private final MetaFilter filter;
/**
* Empty servlet with no bindings.
*/
public MetaServlet() {
this(new MetaFilter());
}
/**
* Initialize a servlet wrapping a filter.
*
* @param delegateFilter
* the filter being wrapped by the servlet.
*/
protected MetaServlet(MetaFilter delegateFilter) {
filter = delegateFilter;
}
/**
* Get delegate filter
*
* @return filter this servlet delegates all routing logic to.
*/
protected MetaFilter getDelegateFilter() {
return filter;
}
/**
* Construct a binding for a specific path.
*
* @param path
* pattern to match.
* @return binder for the passed path.
*/
public ServletBinder serve(String path) {
return filter.serve(path);
}
/**
* Construct a binding for a regular expression.
*
* @param expression
* the regular expression to pattern match the URL against.
* @return binder for the passed expression.
*/
public ServletBinder serveRegex(String expression) {
return filter.serveRegex(expression);
}
/** {@inheritDoc} */
@Override
public void init(ServletConfig config) throws ServletException {
String name = filter.getClass().getName();
ServletContext ctx = config.getServletContext();
filter.init(new NoParameterFilterConfig(name, ctx));
}
/** {@inheritDoc} */
@Override
public void destroy() {
filter.destroy();
}
/** {@inheritDoc} */
@Override
protected void service(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
filter.doFilter(req, res,
(ServletRequest request, ServletResponse response) -> {
((HttpServletResponse) response).sendError(SC_NOT_FOUND);
});
}
/**
* Configure a newly created binder.
*
* @param b
* the newly created binder.
* @return binder for the caller, potentially after adding one or more
* filters into the pipeline.
*/
protected ServletBinder register(ServletBinder b) {
return filter.register(b);
}
}
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