Examples with ChannelExec com.jcraft.jsch.ChannelExec used on opensource projects

Example 96 with ChannelExec

use of com.jcraft.jsch.ChannelExec in project onos by opennetworkinglab.

the class SshUtil method executeCommand.

/**
 * Executes a given command. It opens exec channel for the command and closes
 * the channel when it's done.
 *
 * @param session ssh connection to a remote server
 * @param command command to execute
 * @return command output string if the command succeeds, or null
 */
public static String executeCommand(Session session, String command) {
    if (session == null || !session.isConnected()) {
        log.error("Invalid session({})", session);
        return null;
    }
    log.info("executeCommand: ssh command {} to {}", command, session.getHost());
    try {
        Channel channel = session.openChannel("exec");
        if (channel == null) {
            log.debug("Invalid channel of session({}) for command({})", session, command);
            return null;
        }
        ((ChannelExec) channel).setCommand(command);
        channel.setInputStream(null);
        InputStream output = channel.getInputStream();
        channel.connect();
        String result = CharStreams.toString(new InputStreamReader(output, StandardCharsets.UTF_8));
        log.trace("SSH result(on {}): {}", session.getHost(), result);
        channel.disconnect();
        return result;
    } catch (JSchException | IOException e) {
        log.debug("Failed to execute command {} due to {}", command, e);
        return null;
    }
}

Example 97 with ChannelExec

use of com.jcraft.jsch.ChannelExec in project onos by opennetworkinglab.

the class SshUtil method fetchLastTerm.

/**
 * Fetches last term after executing command.
 * @param session  ssh session
 * @param command command to execute
 * @return last term, or null
 */
public static String fetchLastTerm(Session session, String command) {
    if (session == null || !session.isConnected()) {
        log.error("Invalid session({})", session);
        return null;
    }
    log.info("fetchLastTerm: ssh command {} to {}", command, session.getHost());
    try {
        Channel channel = session.openChannel("exec");
        if (channel == null) {
            log.error("Invalid channel of session({}) for command({})", session, command);
            return null;
        }
        ((ChannelExec) channel).setCommand(command);
        channel.setInputStream(null);
        InputStream output = channel.getInputStream();
        channel.connect();
        String[] lineList = null;
        try (BufferedReader reader = new BufferedReader(new InputStreamReader(output, StandardCharsets.UTF_8))) {
            lineList = reader.lines().findFirst().get().split(SPACESEPERATOR);
        } catch (IOException e) {
            log.error("Exception in fetchLastTerm", e);
        } finally {
            channel.disconnect();
            output.close();
        }
        if (lineList.length > 0) {
            return lineList[lineList.length - 1];
        } else {
            return null;
        }
    } catch (JSchException | IOException e) {
        log.error("Exception in fetchLastTerm", e);
        return null;
    }
}

Example 98 with ChannelExec

use of com.jcraft.jsch.ChannelExec in project Jpom by dromara.

the class TestJschExec method test1.

@Test
public void test1() throws IOException, JSchException {
    Charset charset = CharsetUtil.CHARSET_UTF_8;
    Session session = JschUtil.createSession("192.168.1.8", 22, "root", "123456+");
    // session.connect();
    // ChannelExec channel = (ChannelExec) session.openChannel("exec");
    ChannelExec channel = (ChannelExec) JschUtil.createChannel(session, ChannelType.EXEC);
    // 添加环境变量
    channel.setCommand(cmd);
    InputStream inputStream = channel.getInputStream();
    InputStream errStream = channel.getErrStream();
    // channel.connect((int) TimeUnit.SECONDS.toMillis(5));
    channel.connect();
    // 
    final String[] error = new String[1];
    final String[] result = new String[1];
    try {
        System.out.println(error[0] = IoUtil.read(errStream, charset));
    } catch (Exception e) {
        e.printStackTrace();
        if (!StrUtil.contains(e.getMessage(), "Pipe closed")) {
            DefaultSystemLog.getLog().error("读取 exec err 流发生异常", e);
            error[0] = "读取 exec err 流发生异常" + e.getMessage();
        }
    }
    try {
        result[0] = IoUtil.read(inputStream, charset);
    } catch (Exception e) {
        e.printStackTrace();
        if (!StrUtil.contains(e.getMessage(), "Pipe closed")) {
            DefaultSystemLog.getLog().error("读取 exec 流发生异常", e);
            result[0] = "读取 exec 流发生异常" + e.getMessage();
        }
    }
    System.out.println("结束 " + result[0] + "  " + error[0]);
}

Example 99 with ChannelExec

use of com.jcraft.jsch.ChannelExec in project Jpom by dromara.

the class TestJschExec method test.

@Test
public void test() throws IOException, JSchException {
    Charset charset = CharsetUtil.CHARSET_UTF_8;
    Session session = JschUtil.createSession("192.168.1.8", 22, "root", "123456+");
    ChannelExec channel = (ChannelExec) JschUtil.createChannel(session, ChannelType.EXEC);
    // 添加环境变量
    channel.setCommand(cmd);
    InputStream inputStream = channel.getInputStream();
    InputStream errStream = channel.getErrStream();
    channel.connect((int) TimeUnit.SECONDS.toMillis(5));
    // 
    SyncFinisher syncFinisher = new SyncFinisher(2);
    final String[] error = new String[1];
    final String[] result = new String[1];
    // 
    syncFinisher.addRepeatWorker(() -> {
        try {
            error[0] = IoUtil.read(errStream, charset);
        } catch (Exception e) {
            e.printStackTrace();
            if (!StrUtil.contains(e.getMessage(), "Pipe closed")) {
                DefaultSystemLog.getLog().error("读取 exec err 流发生异常", e);
                error[0] = "读取 exec err 流发生异常" + e.getMessage();
            }
        } finally {
            syncFinisher.stop();
        }
    }).addRepeatWorker(() -> {
        try {
            result[0] = IoUtil.read(inputStream, charset);
        } catch (Exception e) {
            e.printStackTrace();
            if (!StrUtil.contains(e.getMessage(), "Pipe closed")) {
                DefaultSystemLog.getLog().error("读取 exec 流发生异常", e);
                result[0] = "读取 exec 流发生异常" + e.getMessage();
            }
        } finally {
            syncFinisher.stop();
        }
    }).start();
    System.out.println(result[0] + "  " + error[0]);
}