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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;
-
- import static javax.servlet.http.HttpServletResponse.SC_FORBIDDEN;
- import static javax.servlet.http.HttpServletResponse.SC_UNAUTHORIZED;
- import static org.eclipse.jgit.http.server.GitSmartHttpTools.infoRefsResultType;
- import static org.eclipse.jgit.http.server.GitSmartHttpTools.sendError;
- import static org.eclipse.jgit.http.server.ServletUtils.ATTRIBUTE_HANDLER;
- import static org.eclipse.jgit.http.server.ServletUtils.getRepository;
-
- import java.io.IOException;
- import java.util.List;
-
- 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.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
-
- import org.eclipse.jgit.lib.Repository;
- import org.eclipse.jgit.transport.PacketLineOut;
- import org.eclipse.jgit.transport.RefAdvertiser.PacketLineOutRefAdvertiser;
- import org.eclipse.jgit.transport.ServiceMayNotContinueException;
- import org.eclipse.jgit.transport.resolver.ServiceNotAuthorizedException;
- import org.eclipse.jgit.transport.resolver.ServiceNotEnabledException;
-
- /** Filter in front of {@link InfoRefsServlet} to catch smart service requests. */
- abstract class SmartServiceInfoRefs implements Filter {
- private final String svc;
-
- private final Filter[] filters;
-
- SmartServiceInfoRefs(String service, List<Filter> filters) {
- this.svc = service;
- this.filters = filters.toArray(new Filter[0]);
- }
-
- /** {@inheritDoc} */
- @Override
- public void init(FilterConfig config) throws ServletException {
- // Do nothing.
- }
-
- /** {@inheritDoc} */
- @Override
- public void destroy() {
- // Do nothing.
- }
-
- /** {@inheritDoc} */
- @Override
- public void doFilter(ServletRequest request, ServletResponse response,
- FilterChain chain) throws IOException, ServletException {
- final HttpServletRequest req = (HttpServletRequest) request;
- final HttpServletResponse res = (HttpServletResponse) response;
-
- if (svc.equals(req.getParameter("service"))) {
- final Repository db = getRepository(req);
- try {
- begin(req, db);
- } catch (ServiceNotAuthorizedException e) {
- res.sendError(SC_UNAUTHORIZED, e.getMessage());
- return;
- } catch (ServiceNotEnabledException e) {
- sendError(req, res, SC_FORBIDDEN, e.getMessage());
- return;
- }
-
- try {
- if (filters.length == 0)
- service(req, response);
- else
- new Chain().doFilter(request, response);
- } finally {
- req.removeAttribute(ATTRIBUTE_HANDLER);
- }
- } else {
- chain.doFilter(request, response);
- }
- }
-
- private void service(ServletRequest request, ServletResponse response)
- throws IOException {
- final HttpServletRequest req = (HttpServletRequest) request;
- final HttpServletResponse res = (HttpServletResponse) response;
- final SmartOutputStream buf = new SmartOutputStream(req, res, true);
- try {
- res.setContentType(infoRefsResultType(svc));
-
- final PacketLineOut out = new PacketLineOut(buf);
- respond(req, out, svc);
- buf.close();
- } catch (ServiceNotAuthorizedException e) {
- res.sendError(SC_UNAUTHORIZED, e.getMessage());
- } catch (ServiceNotEnabledException e) {
- sendError(req, res, SC_FORBIDDEN, e.getMessage());
- } catch (ServiceMayNotContinueException e) {
- if (e.isOutput())
- buf.close();
- else
- sendError(req, res, e.getStatusCode(), e.getMessage());
- }
- }
-
- /**
- * Begin service.
- *
- * @param req
- * request
- * @param db
- * repository
- * @throws IOException
- * @throws ServiceNotEnabledException
- * @throws ServiceNotAuthorizedException
- */
- protected abstract void begin(HttpServletRequest req, Repository db)
- throws IOException, ServiceNotEnabledException,
- ServiceNotAuthorizedException;
-
- /**
- * Advertise.
- *
- * @param req
- * request
- * @param pck
- * @throws IOException
- * @throws ServiceNotEnabledException
- * @throws ServiceNotAuthorizedException
- */
- protected abstract void advertise(HttpServletRequest req,
- PacketLineOutRefAdvertiser pck) throws IOException,
- ServiceNotEnabledException, ServiceNotAuthorizedException;
-
- /**
- * Writes the appropriate response to an info/refs request received by
- * a smart service. In protocol v0, this starts with "#
- * service=serviceName" followed by a flush packet, but this is not
- * necessarily the case in other protocol versions.
- * <p>
- * The default implementation writes "# service=serviceName" and a
- * flush packet, then calls {@link #advertise}. Subclasses should
- * override this method if they support protocol versions other than
- * protocol v0.
- *
- * @param req
- * request
- * @param pckOut
- * destination of response
- * @param serviceName
- * service name to be written out in protocol v0; may or may
- * not be used in other versions
- * @throws IOException
- * @throws ServiceNotEnabledException
- * @throws ServiceNotAuthorizedException
- */
- protected void respond(HttpServletRequest req,
- PacketLineOut pckOut, String serviceName)
- throws IOException, ServiceNotEnabledException,
- ServiceNotAuthorizedException {
- pckOut.writeString("# service=" + svc + '\n'); //$NON-NLS-1$
- pckOut.end();
- advertise(req, new PacketLineOutRefAdvertiser(pckOut));
- }
-
- private class Chain implements FilterChain {
- private int filterIdx;
-
- @Override
- public void doFilter(ServletRequest req, ServletResponse rsp)
- throws IOException, ServletException {
- if (filterIdx < filters.length)
- filters[filterIdx++].doFilter(req, rsp, this);
- else
- service(req, rsp);
- }
- }
- }
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