| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.sshd.sftp.client.fs; |
| |
| import java.io.IOException; |
| import java.time.Duration; |
| import java.util.Map; |
| |
| import org.apache.sshd.client.session.ClientSession; |
| import org.apache.sshd.client.session.ClientSessionCreator; |
| import org.apache.sshd.common.auth.PasswordHolder; |
| import org.apache.sshd.common.auth.UsernameHolder; |
| import org.apache.sshd.common.session.SessionHeartbeatController; |
| import org.apache.sshd.common.util.io.functors.IOFunction; |
| import org.apache.sshd.sftp.client.SftpErrorDataHandler; |
| import org.apache.sshd.sftp.client.SftpVersionSelector; |
| |
| /** |
| * Provides user hooks into the process of creating a {@link SftpFileSystem} via a {@link SftpFileSystemProvider}. |
| * |
| * @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a> |
| */ |
| public interface SftpFileSystemClientSessionInitializer { |
| SftpFileSystemClientSessionInitializer DEFAULT = new SftpFileSystemClientSessionInitializer() { |
| @Override |
| public String toString() { |
| return SftpFileSystemClientSessionInitializer.class.getSimpleName() + "[DEFAULT]"; |
| } |
| }; |
| |
| /** |
| * Invoked by the {@link SftpFileSystemProvider#newFileSystem(java.net.URI, Map)} method in order to obtain an |
| * initial (non-authenticated) {@link ClientSession}. |
| * |
| * @param provider The {@link SftpFileSystemProvider} instance requesting the session |
| * @param context The initialization {@link SftpFileSystemInitializationContext} |
| * @return The created {@link ClientSession} |
| * @throws IOException If failed to connect |
| */ |
| default ClientSession createClientSession( |
| SftpFileSystemProvider provider, SftpFileSystemInitializationContext context) |
| throws IOException { |
| UsernameHolder user = context.getCredentials(); |
| ClientSessionCreator client = provider.getClientInstance(); |
| return client.connect(user.getUsername(), context.getHost(), context.getPort()) |
| .verify(context.getMaxConnectTime()) |
| .getSession(); |
| } |
| |
| /** |
| * Invoked by the {@link SftpFileSystemProvider#newFileSystem(java.net.URI, Map)} method in order to authenticate |
| * the session obtained from |
| * {@link #createClientSession(SftpFileSystemProvider, SftpFileSystemInitializationContext)} |
| * |
| * @param provider The {@link SftpFileSystemProvider} instance requesting the session |
| * @param context The initialization {@link SftpFileSystemInitializationContext} |
| * @param session The created {@link ClientSession} |
| * @throws IOException If failed to authenticate |
| */ |
| default void authenticateClientSession( |
| SftpFileSystemProvider provider, SftpFileSystemInitializationContext context, ClientSession session) |
| throws IOException { |
| PasswordHolder passwordHolder = context.getCredentials(); |
| String password = passwordHolder.getPassword(); |
| // If no password provided perhaps the client is set-up to use registered public keys |
| if (password != null) { |
| session.addPasswordIdentity(password); |
| } |
| session.auth().verify(context.getMaxAuthTime()); |
| |
| // Keep this session open for as long as the filesystem is in use. |
| // TODO: the interval should be configurable somehow. |
| session.setSessionHeartbeat(SessionHeartbeatController.HeartbeatType.IGNORE, Duration.ofSeconds(10)); |
| } |
| |
| /** |
| * Invoked by the {@link SftpFileSystemProvider#newFileSystem(java.net.URI, Map)} method in order to create the |
| * {@link SftpFileSystem} once session has been authenticated. |
| * |
| * @param provider The {@link SftpFileSystemProvider} instance requesting the session |
| * @param context The initialization {@link SftpFileSystemInitializationContext} |
| * @param session The authenticated {@link ClientSession} |
| * @param selector The <U>resolved</U> {@link SftpVersionSelector} to use |
| * @param errorDataHandler The {@link SftpErrorDataHandler} to handle incoming data through the error stream - |
| * if {@code null} the data is silently ignored |
| * @return The created {@link SftpFileSystem} |
| * @throws IOException If failed to create the file-system |
| * @deprecated since 2.10.1 |
| */ |
| @Deprecated |
| default SftpFileSystem createSftpFileSystem( |
| SftpFileSystemProvider provider, SftpFileSystemInitializationContext context, ClientSession session, |
| SftpVersionSelector selector, SftpErrorDataHandler errorDataHandler) |
| throws IOException { |
| return createSftpFileSystem(provider, context, x -> session, selector, errorDataHandler); |
| } |
| |
| /** |
| * Invoked by the {@link SftpFileSystemProvider#newFileSystem(java.net.URI, Map)} method in order to create the |
| * {@link SftpFileSystem} once session has been authenticated. |
| * |
| * @param provider The {@link SftpFileSystemProvider} instance requesting the session |
| * @param context The initialization {@link SftpFileSystemInitializationContext} |
| * @param sessionProvider A factory for authenticated {@link ClientSession}s |
| * @param selector The <U>resolved</U> {@link SftpVersionSelector} to use |
| * @param errorDataHandler The {@link SftpErrorDataHandler} to handle incoming data through the error stream - if |
| * {@code null} the data is silently ignored |
| * @return The created {@link SftpFileSystem} |
| * @throws IOException If failed to create the file-system |
| */ |
| default SftpFileSystem createSftpFileSystem( |
| SftpFileSystemProvider provider, SftpFileSystemInitializationContext context, |
| IOFunction<Boolean, ClientSession> sessionProvider, SftpVersionSelector selector, |
| SftpErrorDataHandler errorDataHandler) throws IOException { |
| return new SftpFileSystemAutomatic(provider, context.getId(), sessionProvider, provider.getSftpClientFactory(), |
| selector, errorDataHandler); |
| } |
| } |