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com.taobao.arthas.client.TelnetConsole Maven / Gradle / Ivy
package com.taobao.arthas.client;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.TimeUnit;
import org.apache.commons.net.telnet.InvalidTelnetOptionException;
import org.apache.commons.net.telnet.TelnetClient;
import org.apache.commons.net.telnet.TelnetOptionHandler;
import org.apache.commons.net.telnet.WindowSizeOptionHandler;
import com.taobao.arthas.common.OSUtils;
import com.taobao.arthas.common.UsageRender;
import com.taobao.middleware.cli.CLI;
import com.taobao.middleware.cli.CommandLine;
import com.taobao.middleware.cli.UsageMessageFormatter;
import com.taobao.middleware.cli.annotations.Argument;
import com.taobao.middleware.cli.annotations.CLIConfigurator;
import com.taobao.middleware.cli.annotations.Description;
import com.taobao.middleware.cli.annotations.Name;
import com.taobao.middleware.cli.annotations.Option;
import com.taobao.middleware.cli.annotations.Summary;
import jline.Terminal;
import jline.TerminalSupport;
import jline.UnixTerminal;
import jline.console.ConsoleReader;
import jline.console.KeyMap;
/**
* @author ralf0131 2016-12-29 11:55.
* @author hengyunabc 2018-11-01
*/
@Name("arthas-client")
@Summary("Arthas Telnet Client")
@Description("EXAMPLES:\n" + " java -jar arthas-client.jar 127.0.0.1 3658\n"
+ " java -jar arthas-client.jar -c 'dashboard -n 1' \n"
+ " java -jar arthas-client.jar -f batch.as 127.0.0.1\n")
public class TelnetConsole {
private static final String PROMPT = "[arthas@"; // [arthas@49603]$
private static final int DEFAULT_CONNECTION_TIMEOUT = 5000; // 5000 ms
private static final byte CTRL_C = 0x03;
// ------- Status codes ------- //
/**
* Process success
*/
public static final int STATUS_OK = 0;
/**
* Generic error
*/
public static final int STATUS_ERROR = 1;
/**
* Execute commands timeout
*/
public static final int STATUS_EXEC_TIMEOUT = 100;
/**
* Execute commands error
*/
public static final int STATUS_EXEC_ERROR = 101;
private boolean help = false;
private String targetIp = "127.0.0.1";
private int port = 3658;
private String command;
private String batchFile;
private int executionTimeout = -1;
private Integer width = null;
private Integer height = null;
@Argument(argName = "target-ip", index = 0, required = false)
@Description("Target ip")
public void setTargetIp(String targetIp) {
this.targetIp = targetIp;
}
@Argument(argName = "port", index = 1, required = false)
@Description("The remote server port")
public void setPort(int port) {
this.port = port;
}
@Option(longName = "help", flag = true)
@Description("Print usage")
public void setHelp(boolean help) {
this.help = help;
}
@Option(shortName = "c", longName = "command")
@Description("Command to execute, multiple commands separated by ;")
public void setCommand(String command) {
this.command = command;
}
@Option(shortName = "f", longName = "batch-file")
@Description("The batch file to execute")
public void setBatchFile(String batchFile) {
this.batchFile = batchFile;
}
@Option(shortName = "t", longName = "execution-timeout")
@Description("The timeout (ms) of execute commands or batch file ")
public void setExecutionTimeout(int executionTimeout) {
this.executionTimeout = executionTimeout;
}
@Option(shortName = "w", longName = "width")
@Description("The terminal width")
public void setWidth(int width) {
this.width = width;
}
@Option(shortName = "h", longName = "height")
@Description("The terminal height")
public void setheight(int height) {
this.height = height;
}
public TelnetConsole() {
}
private static List readLines(File batchFile) {
List list = new ArrayList();
BufferedReader br = null;
try {
br = new BufferedReader(new FileReader(batchFile));
String line = br.readLine();
while (line != null) {
list.add(line);
line = br.readLine();
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (br != null) {
try {
br.close();
} catch (IOException e) {
// ignore
}
}
}
return list;
}
public static void main(String[] args) throws Exception {
try {
int status = process(args, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
System.exit(STATUS_OK);
}
});
System.exit(status);
} catch (Throwable e) {
e.printStackTrace();
CLI cli = CLIConfigurator.define(TelnetConsole.class);
System.out.println(usage(cli));
System.exit(STATUS_ERROR);
}
}
/**
* 提供给arthas-boot使用的主处理函数
*
* @param args
* @return status code
* @throws IOException
* @throws InterruptedException
*/
public static int process(String[] args) throws IOException, InterruptedException {
return process(args, null);
}
/**
* arthas client 主函数
* 注意： process()函数提供给arthas-boot使用，内部不能调用System.exit()结束进程的方法
*
* @param args
* @param eotEventCallback Ctrl+D signals an End of Transmission (EOT) event
* @return status code
* @throws IOException
*/
public static int process(String[] args, ActionListener eotEventCallback) throws IOException {
// support mingw/cygw jline color
if (OSUtils.isCygwinOrMinGW()) {
System.setProperty("jline.terminal", System.getProperty("jline.terminal", "jline.UnixTerminal"));
}
TelnetConsole telnetConsole = new TelnetConsole();
CLI cli = CLIConfigurator.define(TelnetConsole.class);
CommandLine commandLine = cli.parse(Arrays.asList(args));
CLIConfigurator.inject(commandLine, telnetConsole);
if (telnetConsole.isHelp()) {
System.out.println(usage(cli));
return STATUS_ERROR;
}
// Try to read cmds
List cmds = new ArrayList();
if (telnetConsole.getCommand() != null) {
for (String c : telnetConsole.getCommand().split(";")) {
cmds.add(c.trim());
}
} else if (telnetConsole.getBatchFile() != null) {
File file = new File(telnetConsole.getBatchFile());
if (!file.exists()) {
throw new IllegalArgumentException("batch file do not exist: " + telnetConsole.getBatchFile());
} else {
cmds.addAll(readLines(file));
}
}
final ConsoleReader consoleReader = new ConsoleReader(System.in, System.out);
consoleReader.setHandleUserInterrupt(true);
Terminal terminal = consoleReader.getTerminal();
// support catch ctrl+c event
terminal.disableInterruptCharacter();
if (terminal instanceof UnixTerminal) {
((UnixTerminal) terminal).disableLitteralNextCharacter();
}
try {
int width = TerminalSupport.DEFAULT_WIDTH;
int height = TerminalSupport.DEFAULT_HEIGHT;
if (!cmds.isEmpty()) {
// batch mode
if (telnetConsole.getWidth() != null) {
width = telnetConsole.getWidth();
}
if (telnetConsole.getheight() != null) {
height = telnetConsole.getheight();
}
} else {
// normal telnet client, get current terminal size
if (telnetConsole.getWidth() != null) {
width = telnetConsole.getWidth();
} else {
width = terminal.getWidth();
// hack for windows dos
if (OSUtils.isWindows()) {
width--;
}
}
if (telnetConsole.getheight() != null) {
height = telnetConsole.getheight();
} else {
height = terminal.getHeight();
}
}
final TelnetClient telnet = new TelnetClient();
telnet.setConnectTimeout(DEFAULT_CONNECTION_TIMEOUT);
// send init terminal size
TelnetOptionHandler sizeOpt = new WindowSizeOptionHandler(width, height, true, true, false, false);
try {
telnet.addOptionHandler(sizeOpt);
} catch (InvalidTelnetOptionException e) {
// ignore
}
// ctrl + c event callback
consoleReader.getKeys().bind(Character.toString((char) CTRL_C), new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
try {
consoleReader.getCursorBuffer().clear(); // clear current line
telnet.getOutputStream().write(CTRL_C);
telnet.getOutputStream().flush();
} catch (Exception e1) {
e1.printStackTrace();
}
}
});
// ctrl + d event call back
consoleReader.getKeys().bind(Character.toString(KeyMap.CTRL_D), eotEventCallback);
try {
telnet.connect(telnetConsole.getTargetIp(), telnetConsole.getPort());
} catch (IOException e) {
System.out.println("Connect to telnet server error: " + telnetConsole.getTargetIp() + " "
+ telnetConsole.getPort());
throw e;
}
if (cmds.isEmpty()) {
IOUtil.readWrite(telnet.getInputStream(), telnet.getOutputStream(), consoleReader.getInput(),
consoleReader.getOutput());
} else {
try {
return batchModeRun(telnet, cmds, telnetConsole.getExecutionTimeout());
} catch (Throwable e) {
System.out.println("Execute commands error: " + e.getMessage());
e.printStackTrace();
return STATUS_EXEC_ERROR;
} finally {
try {
telnet.disconnect();
} catch (IOException e) {
//ignore ex
}
}
}
return STATUS_OK;
} finally {
//reset terminal setting, fix https://github.com/alibaba/arthas/issues/1412
try {
terminal.restore();
} catch (Throwable e) {
System.out.println("Restore terminal settings failure: "+e.getMessage());
e.printStackTrace();
}
}
}
private static int batchModeRun(TelnetClient telnet, List commands, final int executionTimeout)
throws IOException, InterruptedException {
if (commands.size() == 0) {
return STATUS_OK;
}
long startTime = System.currentTimeMillis();
final InputStream inputStream = telnet.getInputStream();
final OutputStream outputStream = telnet.getOutputStream();
final BlockingQueue receviedPromptQueue = new LinkedBlockingQueue(1);
Thread printResultThread = new Thread(new Runnable() {
@Override
public void run() {
try {
StringBuilder line = new StringBuilder();
BufferedReader in = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));
int b = -1;
while (true) {
b = in.read();
if (b == -1) {
break;
}
line.appendCodePoint(b);
// 检查到有 [arthas@ 时，意味着可以执行下一个命令了
int index = line.indexOf(PROMPT);
if (index > 0) {
line.delete(0, index + PROMPT.length());
receviedPromptQueue.put("");
}
System.out.print(Character.toChars(b));
}
} catch (Exception e) {
// ignore
}
}
});
printResultThread.start();
// send commands to arthas server
for (String command : commands) {
if (command.trim().isEmpty()) {
continue;
}
// try poll prompt and check timeout
while (receviedPromptQueue.poll(100, TimeUnit.MILLISECONDS) == null) {
if (executionTimeout > 0) {
long now = System.currentTimeMillis();
if (now - startTime > executionTimeout) {
return STATUS_EXEC_TIMEOUT;
}
}
}
// send command to server
outputStream.write((command + " | plaintext\n").getBytes());
outputStream.flush();
}
// 读到最后一个命令执行后的 prompt ，可以直接发 quit命令了。
receviedPromptQueue.take();
outputStream.write("quit\n".getBytes());
outputStream.flush();
System.out.println();
return STATUS_OK;
}
private static String usage(CLI cli) {
StringBuilder usageStringBuilder = new StringBuilder();
UsageMessageFormatter usageMessageFormatter = new UsageMessageFormatter();
usageMessageFormatter.setOptionComparator(null);
cli.usage(usageStringBuilder, usageMessageFormatter);
return UsageRender.render(usageStringBuilder.toString());
}
public String getTargetIp() {
return targetIp;
}
public int getPort() {
return port;
}
public String getCommand() {
return command;
}
public String getBatchFile() {
return batchFile;
}
public int getExecutionTimeout() {
return executionTimeout;
}
public Integer getWidth() {
return width;
}
public Integer getheight() {
return height;
}
public boolean isHelp() {
return help;
}
}
