如何使用 apache SSHD ScpClient upload/download 文件

How to upload/download files using apache SSHD ScpClient

我不知道我在为 send/receive 文件设置 ScpClient 时做错了什么。

我正在使用 Apache MINA SSHD 库启动 SSH 服务器并尝试复制文件to/from。

这是我的设置:

SSHServer.java

public class SSHServer {

    private SshServer sshServer;
    private static final Logger logger = LoggerFactory.getLogger(SSHServer.class);

    public SSHServer() {
        sshServer = SshServer.setUpDefaultServer();
        sshServer.setHost("127.0.0.1");
        sshServer.setPort(22);
        sshServer.setKeyPairProvider(new SimpleGeneratorHostKeyProvider());
        //Accept all keys for authentication
        //sshServer.setPublickeyAuthenticator((s, publicKey, serverSession) -> true);
        sshServer.setFileSystemFactory(new VirtualFileSystemFactory() {
            @Override
            public Path getUserHomeDir(SessionContext session) throws IOException {
                return Paths.get("C:/Users/u660221");
            }
        });
        sshServer.setCommandFactory(new ScpCommandFactory());
        sshServer.setPasswordAuthenticator((username, password, serverSession) -> {
            logger.debug("authenticating: {} password: {}", username, password);
            return username != null && "changeit".equals(password);
        });
    }

    public int getPort() {
        return sshServer.getPort();
    }

    public String getHost() {
        return sshServer.getHost();
    }

    public void startServer() throws IOException{
        sshServer.start();
        logger.debug("SSHServer started...");
    }

    public void stopServer() throws IOException {
        sshServer.stop();
        logger.debug("SSHServer stopped...");
    }
}

SSHClient.java

public class SSHClient {

    private SshClient sshClient;
    private String username;
    private String host;
    private String password;
    private int port;
    private static final Logger logger = LoggerFactory.getLogger(SSHClient.class);

    private SSHClient(){}

    public SSHClient(String username, String password, String host, int port) {
        sshClient = SshClient.setUpDefaultClient();
        sshClient.setFileSystemFactory(new VirtualFileSystemFactory() {
            @Override
            public Path getUserHomeDir(SessionContext session) throws IOException {
                return Paths.get("C:/Users/u660221");
            }
        });
        this.username = username;
        this.password = password;
        this.host = host;
        this.port = port;
    }

    public ClientSession connect()  throws IOException {
        ConnectFuture connectFuture = sshClient.connect(username, host, port).verify();
        logger.debug("SSHClient is connected: {}", connectFuture.isConnected());
        return connectFuture.getSession();
    }

    public void startClient() {
        sshClient.start();
        logger.debug("SSHClient is started...");
    }

    public void stopClient() {
        sshClient.stop();
        logger.debug("SSHClient is stopped...");
    }
}

TestSSH.java

    public class TestSSH {
        private static final Logger logger = LoggerFactory.getLogger(TestSSH.class);
        public static void main(String[] args) throws IOException {
            SSHServer sshServer = new SSHServer();
            sshServer.startServer();
            logger.debug("Started SSHServer on HOST: " + sshServer.getHost() + " PORT: " + sshServer.getPort());
            SSHClient sshClient = new SSHClient("u660221", "changeit",
                                                        sshServer.getHost(), sshServer.getPort());
            sshClient.startClient();
            ClientSession clientSession = sshClient.connect();
            clientSession.addPasswordIdentity("changeit");
            AuthFuture authFuture = clientSession.auth().verify();
            logger.debug("is client auth success: "  + authFuture.isSuccess());
            logger.debug("client connect address: {}", clientSession.getConnectAddress().toString());
            ScpClientCreator creator = ScpClientCreator.instance();
            ScpClient scpClient = creator.createScpClient(clientSession);
//FileOutputStream fo = new FileOutputStream("C:\Users\u660221\destination\file.jar");
//scpClient.download("u660221@127.0.0.1:\Project\file.jar", fo); //this works!!!!!
       //does not work     //scpClient.upload(Paths.get("C:/Users/u660221/source"), "u660221@127.0.0.1:/destination", ScpClient.Option.Recursive, ScpClient.Option.PreserveAttributes, ScpClient.Option.TargetIsDirectory);
            scpClient.download("u660221@127.0.0.1:/source/", Paths.get("C:/Users/u660221/destination"), ScpClient.Option.Recursive, ScpClient.Option.PreserveAttributes); //does not work
        }
    }

这是未注释的下载行的 o/p(由于未复制任何内容,因此失败):

2020-07-02 13:57:15,186 DEBUG c.w.v.g.s.SSHServer [main] SSHServer started...
2020-07-02 13:57:15,202 DEBUG c.w.v.g.s.TestSSH [main] Started SSHServer on HOST: 127.0.0.1 PORT: 22
2020-07-02 13:57:15,357 DEBUG c.w.v.g.s.SSHClient [main] SSHClient is started...
2020-07-02 13:57:15,896 DEBUG c.w.v.g.s.SSHClient [main] SSHClient is connected: true
2020-07-02 13:57:17,690 DEBUG c.w.v.g.s.SSHServer [sshd-SshServer[25a6944c](port=22)-nio2-thread-1] authenticating: u660221 password: changeit
2020-07-02 13:57:17,695 DEBUG c.w.v.g.s.TestSSH [main] is client auth success: true
2020-07-02 13:57:17,696 DEBUG c.w.v.g.s.TestSSH [main] client connect address: /127.0.0.1:22

这是 o/p 未注释的上传行:

2020-07-02 14:14:08,034 DEBUG c.w.v.g.s.SSHServer [main] SSHServer started...
2020-07-02 14:14:08,044 DEBUG c.w.v.g.s.TestSSH [main] Started SSHServer on HOST: 127.0.0.1 PORT: 22
2020-07-02 14:14:08,175 DEBUG c.w.v.g.s.SSHClient [main] SSHClient is started...
2020-07-02 14:14:08,598 DEBUG c.w.v.g.s.SSHClient [main] SSHClient is connected: true
2020-07-02 14:14:10,412 DEBUG c.w.v.g.s.SSHServer [sshd-SshServer[77888435](port=22)-nio2-thread-3] authenticating: u660221 password: changeit
2020-07-02 14:14:10,417 DEBUG c.w.v.g.s.TestSSH [main] is client auth success: true
2020-07-02 14:14:10,417 DEBUG c.w.v.g.s.TestSSH [main] client connect address: /127.0.0.1:22
Exception in thread "main" java.io.EOFException: readAck - EOF before ACK
    at org.apache.sshd.common.scp.ScpHelper.readAck(ScpHelper.java:849)
    at org.apache.sshd.common.scp.ScpHelper.sendPaths(ScpHelper.java:456)
    at org.apache.sshd.client.scp.AbstractScpClient.lambda$upload(AbstractScpClient.java:158)
    at org.apache.sshd.client.scp.DefaultScpClient.runUpload(DefaultScpClient.java:145)
    at org.apache.sshd.client.scp.AbstractScpClient.upload(AbstractScpClient.java:158)
    at org.apache.sshd.client.scp.ScpClient.upload(ScpClient.java:119)
    at org.apache.sshd.client.scp.ScpClient.upload(ScpClient.java:115)
    at TestSSH.main(TestSSH.java:29)

它似乎无法从 InputStream 读取,但我不知道我做错了什么,顺便说一句,这是一台 windows 机器。为此,我需要在 windows 中安装 scp 吗?

启用调试日志记录后,可以看到这些日志:

2020-07-03 13:40:41,825 DEBUG o.a.s.s.s.ScpCommand [sshd-SshServer[776aec5c](port=22)-nio2-thread-1] Executing command scp -r -d -p -t -- u660221@127.0.0.1:/destination
2020-07-03 13:40:41,825 DEBUG o.a.s.s.s.ScpCommand [sshd-SshServer[776aec5c](port=22)-nio2-thread-1] Unknown flag ('-') in command=scp -r -d -p -t -- u660221@127.0.0.1:/destination

但是这是由 ScpClient 构建的 class 只有我应该做什么?

我找到了答案。

用下面的行替换上传和下载行

scpClient.upload(
   Paths.get("C:\Users\u660221\source"),
   "/destination",
   ScpClient.Option.Recursive,
   ScpClient.Option.PreserveAttributes,
   ScpClient.Option.TargetIsDirectory  );
scpClient.download(
   "/source",
   Paths.get("C:\Users\u660221\destination"),
   ScpClient.Option.Recursive,
   ScpClient.Option.PreserveAttributes,
   ScpClient.Option.TargetIsDirectory  );

方法中无需再次指定遥控器。

这是我发现使用 pscp 来复制 to/from sshServer 并记录在服务器端执行的命令,因为我发现没有必要包括远程,这是完全错误的。