/*
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* Copyright 2014 gitblit.com.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.gitblit.transport.ssh;
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import java.io.IOException;
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import java.util.Scanner;
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import org.apache.sshd.server.Command;
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import org.apache.sshd.server.CommandFactory;
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import org.apache.sshd.server.Environment;
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import org.eclipse.jgit.errors.RepositoryNotFoundException;
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import org.eclipse.jgit.lib.Repository;
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import org.eclipse.jgit.transport.PacketLineOut;
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import org.eclipse.jgit.transport.ReceivePack;
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import org.eclipse.jgit.transport.ServiceMayNotContinueException;
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import org.eclipse.jgit.transport.UploadPack;
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import org.eclipse.jgit.transport.resolver.ReceivePackFactory;
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import org.eclipse.jgit.transport.resolver.ServiceNotAuthorizedException;
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import org.eclipse.jgit.transport.resolver.ServiceNotEnabledException;
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import org.eclipse.jgit.transport.resolver.UploadPackFactory;
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import com.gitblit.git.RepositoryResolver;
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/**
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*
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* @author Eric Myhre
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*
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*/
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public class SshCommandFactory implements CommandFactory {
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public SshCommandFactory(RepositoryResolver<SshDaemonClient> repositoryResolver, UploadPackFactory<SshDaemonClient> uploadPackFactory, ReceivePackFactory<SshDaemonClient> receivePackFactory) {
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this.repositoryResolver = repositoryResolver;
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this.uploadPackFactory = uploadPackFactory;
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this.receivePackFactory = receivePackFactory;
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}
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private RepositoryResolver<SshDaemonClient> repositoryResolver;
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private UploadPackFactory<SshDaemonClient> uploadPackFactory;
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private ReceivePackFactory<SshDaemonClient> receivePackFactory;
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@Override
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public Command createCommand(final String commandLine) {
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Scanner commandScanner = new Scanner(commandLine);
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final String command = commandScanner.next();
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final String argument = commandScanner.nextLine();
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if ("git-upload-pack".equals(command))
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return new UploadPackCommand(argument);
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if ("git-receive-pack".equals(command))
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return new ReceivePackCommand(argument);
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return new NonCommand();
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}
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public abstract class RepositoryCommand extends AbstractSshCommand {
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protected final String repositoryName;
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public RepositoryCommand(String repositoryName) {
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this.repositoryName = repositoryName;
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}
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@Override
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public void start(Environment env) throws IOException {
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Repository db = null;
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try {
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SshDaemonClient client = session.getAttribute(SshDaemonClient.ATTR_KEY);
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db = selectRepository(client, repositoryName);
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if (db == null) return;
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run(client, db);
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exit.onExit(0);
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} catch (ServiceNotEnabledException e) {
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// Ignored. Client cannot use this repository.
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} catch (ServiceNotAuthorizedException e) {
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// Ignored. Client cannot use this repository.
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} finally {
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if (db != null)
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db.close();
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exit.onExit(1);
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}
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}
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protected Repository selectRepository(SshDaemonClient client, String name) throws IOException {
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try {
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return openRepository(client, name);
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} catch (ServiceMayNotContinueException e) {
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// An error when opening the repo means the client is expecting a ref
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// advertisement, so use that style of error.
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PacketLineOut pktOut = new PacketLineOut(out);
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pktOut.writeString("ERR " + e.getMessage() + "\n"); //$NON-NLS-1$ //$NON-NLS-2$
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return null;
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}
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}
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protected Repository openRepository(SshDaemonClient client, String name)
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throws ServiceMayNotContinueException {
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// Assume any attempt to use \ was by a Windows client
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// and correct to the more typical / used in Git URIs.
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//
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name = name.replace('\\', '/');
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// ssh://git@thishost/path should always be name="/path" here
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//
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if (!name.startsWith("/")) //$NON-NLS-1$
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return null;
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try {
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return repositoryResolver.open(client, name.substring(1));
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} catch (RepositoryNotFoundException e) {
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// null signals it "wasn't found", which is all that is suitable
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// for the remote client to know.
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return null;
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} catch (ServiceNotEnabledException e) {
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// null signals it "wasn't found", which is all that is suitable
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// for the remote client to know.
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return null;
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}
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}
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protected abstract void run(SshDaemonClient client, Repository db)
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throws IOException, ServiceNotEnabledException, ServiceNotAuthorizedException;
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}
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public class UploadPackCommand extends RepositoryCommand {
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public UploadPackCommand(String repositoryName) { super(repositoryName); }
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@Override
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protected void run(SshDaemonClient client, Repository db)
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throws IOException, ServiceNotEnabledException, ServiceNotAuthorizedException {
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UploadPack up = uploadPackFactory.create(client, db);
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up.upload(in, out, null);
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}
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}
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public class ReceivePackCommand extends RepositoryCommand {
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public ReceivePackCommand(String repositoryName) { super(repositoryName); }
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@Override
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protected void run(SshDaemonClient client, Repository db)
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throws IOException, ServiceNotEnabledException, ServiceNotAuthorizedException {
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ReceivePack rp = receivePackFactory.create(client, db);
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rp.receive(in, out, null);
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}
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}
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public static class NonCommand extends AbstractSshCommand {
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@Override
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public void start(Environment env) {
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exit.onExit(127);
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}
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}
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}
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