| /* |
| * 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.util.test; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.nio.charset.StandardCharsets; |
| |
| import org.apache.sshd.common.channel.BufferedIoOutputStream; |
| import org.apache.sshd.common.channel.Window; |
| import org.apache.sshd.common.io.IoInputStream; |
| import org.apache.sshd.common.io.IoOutputStream; |
| import org.apache.sshd.common.session.Session; |
| import org.apache.sshd.common.util.buffer.ByteArrayBuffer; |
| import org.apache.sshd.server.Environment; |
| import org.apache.sshd.server.ExitCallback; |
| import org.apache.sshd.server.channel.ChannelDataReceiver; |
| import org.apache.sshd.server.channel.ChannelSession; |
| import org.apache.sshd.server.channel.ChannelSessionAware; |
| import org.apache.sshd.server.command.AsyncCommand; |
| import org.apache.sshd.server.command.Command; |
| import org.apache.sshd.server.shell.ShellFactory; |
| |
| /** |
| * TODO Add javadoc |
| * |
| * @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a> |
| */ |
| public class AsyncEchoShellFactory implements ShellFactory { |
| public AsyncEchoShellFactory() { |
| super(); |
| } |
| |
| @Override |
| public Command createShell(ChannelSession channel) { |
| return new EchoShell(); |
| } |
| |
| public static class EchoShell implements AsyncCommand, ChannelDataReceiver, ChannelSessionAware { |
| private IoOutputStream out; |
| private IoOutputStream err; |
| private ExitCallback callback; |
| private Environment environment; |
| private ChannelSession session; |
| private StringBuilder buffer = new StringBuilder(); |
| |
| public EchoShell() { |
| super(); |
| } |
| |
| public IoOutputStream getOut() { |
| return out; |
| } |
| |
| public IoOutputStream getErr() { |
| return err; |
| } |
| |
| public Environment getEnvironment() { |
| return environment; |
| } |
| |
| @Override |
| public void setInputStream(InputStream in) { |
| // ignored |
| } |
| |
| @Override |
| public void setOutputStream(OutputStream out) { |
| // ignored |
| } |
| |
| @Override |
| public void setErrorStream(OutputStream err) { |
| // ignored |
| } |
| |
| @Override |
| public void setIoInputStream(IoInputStream in) { |
| // ignored |
| } |
| |
| @Override |
| public void setIoOutputStream(IoOutputStream out) { |
| this.out = wrapOutputStream("SHELL-STDOUT", out); |
| } |
| |
| @Override |
| public void setIoErrorStream(IoOutputStream err) { |
| this.err = wrapOutputStream("SHELL-STDERR", err); |
| } |
| |
| protected BufferedIoOutputStream wrapOutputStream(String prefix, IoOutputStream stream) { |
| if (stream instanceof BufferedIoOutputStream) { |
| return (BufferedIoOutputStream) stream; |
| } |
| |
| int channelId = session.getId(); |
| return new BufferedIoOutputStream(prefix + "@" + channelId, channelId, stream, session); |
| } |
| |
| @Override |
| public void setExitCallback(ExitCallback callback) { |
| this.callback = callback; |
| } |
| |
| @Override |
| public void setChannelSession(ChannelSession session) { |
| this.session = session; |
| } |
| |
| @Override |
| public void start(ChannelSession channel, Environment env) throws IOException { |
| environment = env; |
| session.setDataReceiver(this); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| out.close(false).addListener(future -> callback.onExit(0)); |
| } |
| |
| @Override |
| public void destroy(ChannelSession channel) { |
| // ignored |
| } |
| |
| @Override |
| public int data(ChannelSession channel, byte[] buf, int start, int len) throws IOException { |
| buffer.append(new String(buf, start, len, StandardCharsets.UTF_8)); |
| for (int i = 0; i < buffer.length(); i++) { |
| if (buffer.charAt(i) == '\n') { |
| String s = buffer.substring(0, i + 1); |
| byte[] bytes = s.getBytes(StandardCharsets.UTF_8); |
| out.writeBuffer(new ByteArrayBuffer(bytes)).addListener(future -> { |
| Session session1 = channel.getSession(); |
| if (future.isWritten()) { |
| try { |
| Window wLocal = channel.getLocalWindow(); |
| wLocal.consumeAndCheck(bytes.length); |
| } catch (IOException e) { |
| session1.exceptionCaught(e); |
| } |
| } else { |
| Throwable t = future.getException(); |
| session1.exceptionCaught(t); |
| } |
| }); |
| buffer = new StringBuilder(buffer.substring(i + 1)); |
| i = 0; |
| } |
| } |
| return 0; |
| } |
| } |
| } |