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/*
* Copyright (C) 2009-2010, Google Inc. and others
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0 which is available at
* https://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package org.eclipse.jgit.http.server;
import static javax.servlet.http.HttpServletResponse.SC_FORBIDDEN;
import static javax.servlet.http.HttpServletResponse.SC_UNAUTHORIZED;
import static javax.servlet.http.HttpServletResponse.SC_UNSUPPORTED_MEDIA_TYPE;
import static org.eclipse.jgit.http.server.GitSmartHttpTools.UPLOAD_PACK;
import static org.eclipse.jgit.http.server.GitSmartHttpTools.UPLOAD_PACK_REQUEST_TYPE;
import static org.eclipse.jgit.http.server.GitSmartHttpTools.UPLOAD_PACK_RESULT_TYPE;
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.consumeRequestBody;
import static org.eclipse.jgit.http.server.ServletUtils.getInputStream;
import static org.eclipse.jgit.http.server.ServletUtils.getRepository;
import static org.eclipse.jgit.http.server.UploadPackErrorHandler.statusCodeForThrowable;
import static org.eclipse.jgit.util.HttpSupport.HDR_USER_AGENT;
import java.io.IOException;
import java.text.MessageFormat;
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.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.jgit.annotations.Nullable;
import org.eclipse.jgit.errors.PackProtocolException;
import org.eclipse.jgit.http.server.UploadPackErrorHandler.UploadPackRunnable;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.transport.InternalHttpServerGlue;
import org.eclipse.jgit.transport.PacketLineOut;
import org.eclipse.jgit.transport.RefAdvertiser.PacketLineOutRefAdvertiser;
import org.eclipse.jgit.transport.ServiceMayNotContinueException;
import org.eclipse.jgit.transport.UploadPack;
import org.eclipse.jgit.transport.UploadPackInternalServerErrorException;
import org.eclipse.jgit.transport.resolver.ServiceNotAuthorizedException;
import org.eclipse.jgit.transport.resolver.ServiceNotEnabledException;
import org.eclipse.jgit.transport.resolver.UploadPackFactory;
/** Server side implementation of smart fetch over HTTP. */
class UploadPackServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
static class InfoRefs extends SmartServiceInfoRefs {
private final UploadPackFactory<HttpServletRequest> uploadPackFactory;
InfoRefs(UploadPackFactory<HttpServletRequest> uploadPackFactory,
List<Filter> filters) {
super(UPLOAD_PACK, filters);
this.uploadPackFactory = uploadPackFactory;
}
@Override
protected void begin(HttpServletRequest req, Repository db)
throws IOException, ServiceNotEnabledException,
ServiceNotAuthorizedException {
UploadPack up = uploadPackFactory.create(req, db);
InternalHttpServerGlue.setPeerUserAgent(
up,
req.getHeader(HDR_USER_AGENT));
req.setAttribute(ATTRIBUTE_HANDLER, up);
}
@Override
protected void advertise(HttpServletRequest req,
PacketLineOutRefAdvertiser pck) throws IOException,
ServiceNotEnabledException, ServiceNotAuthorizedException {
UploadPack up = (UploadPack) req.getAttribute(ATTRIBUTE_HANDLER);
try {
up.setBiDirectionalPipe(false);
up.sendAdvertisedRefs(pck);
} finally {
// TODO(jonathantanmy): Move responsibility for closing the
// RevWalk to UploadPack, either by making it AutoCloseable
// or by making sendAdvertisedRefs clean up after itself.
up.getRevWalk().close();
}
}
@Override
protected void respond(HttpServletRequest req,
PacketLineOut pckOut, String serviceName) throws IOException,
ServiceNotEnabledException, ServiceNotAuthorizedException {
UploadPack up = (UploadPack) req.getAttribute(ATTRIBUTE_HANDLER);
try {
up.setBiDirectionalPipe(false);
up.sendAdvertisedRefs(new PacketLineOutRefAdvertiser(pckOut), serviceName);
} finally {
// TODO(jonathantanmy): Move responsibility for closing the
// RevWalk to UploadPack, either by making it AutoCloseable
// or by making sendAdvertisedRefs clean up after itself.
up.getRevWalk().close();
}
}
}
static class Factory implements Filter {
private final UploadPackFactory<HttpServletRequest> uploadPackFactory;
Factory(UploadPackFactory<HttpServletRequest> uploadPackFactory) {
this.uploadPackFactory = uploadPackFactory;
}
@Override
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest) request;
HttpServletResponse rsp = (HttpServletResponse) response;
UploadPack rp;
try {
rp = uploadPackFactory.create(req, getRepository(req));
} catch (ServiceNotAuthorizedException e) {
rsp.sendError(SC_UNAUTHORIZED, e.getMessage());
return;
} catch (ServiceNotEnabledException e) {
sendError(req, rsp, SC_FORBIDDEN, e.getMessage());
return;
}
try {
req.setAttribute(ATTRIBUTE_HANDLER, rp);
chain.doFilter(req, rsp);
} finally {
req.removeAttribute(ATTRIBUTE_HANDLER);
}
}
@Override
public void init(FilterConfig filterConfig) throws ServletException {
// Nothing.
}
@Override
public void destroy() {
// Nothing.
}
}
private final UploadPackErrorHandler handler;
UploadPackServlet(@Nullable UploadPackErrorHandler handler) {
this.handler = handler != null ? handler
: this::defaultUploadPackHandler;
}
@Override
public void doPost(HttpServletRequest req, HttpServletResponse rsp)
throws IOException {
if (!UPLOAD_PACK_REQUEST_TYPE.equals(req.getContentType())) {
rsp.sendError(SC_UNSUPPORTED_MEDIA_TYPE);
return;
}
UploadPackRunnable r = () -> {
upload(req, rsp);
};
handler.upload(req, rsp, r);
}
private void upload(HttpServletRequest req, HttpServletResponse rsp)
throws IOException, ServiceMayNotContinueException {
// to be explicitly closed by caller
@SuppressWarnings("resource")
SmartOutputStream out = new SmartOutputStream(req, rsp, false) {
@Override
public void flush() throws IOException {
doFlush();
}
};
Repository repo = null;
try (UploadPack up = (UploadPack) req.getAttribute(ATTRIBUTE_HANDLER)) {
up.setBiDirectionalPipe(false);
rsp.setContentType(UPLOAD_PACK_RESULT_TYPE);
repo = up.getRepository();
up.uploadWithExceptionPropagation(getInputStream(req), out, null);
out.close();
} catch (ServiceMayNotContinueException e) {
if (e.isOutput()) {
consumeRequestBody(req);
out.close();
}
throw e;
} catch (UploadPackInternalServerErrorException e) {
// Special case exception, error message was sent to client.
log(repo, e.getCause());
consumeRequestBody(req);
out.close();
}
}
private void defaultUploadPackHandler(HttpServletRequest req,
HttpServletResponse rsp, UploadPackRunnable r) throws IOException {
try {
r.upload();
} catch (ServiceMayNotContinueException e) {
if (!e.isOutput() && !rsp.isCommitted()) {
rsp.reset();
sendError(req, rsp, e.getStatusCode(), e.getMessage());
}
} catch (Throwable e) {
UploadPack up = (UploadPack) req.getAttribute(ATTRIBUTE_HANDLER);
log(up.getRepository(), e);
if (!rsp.isCommitted()) {
rsp.reset();
String msg = null;
if (e instanceof PackProtocolException
|| e instanceof ServiceNotEnabledException) {
msg = e.getMessage();
}
sendError(req, rsp, statusCodeForThrowable(e), msg);
}
}
}
private void log(Repository git, Throwable e) {
getServletContext().log(MessageFormat.format(
HttpServerText.get().internalErrorDuringUploadPack,
ServletUtils.identify(git)), e);
}
}
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