其他
再见,xShell,自己用Java撸一个Web版的,网友直呼:666
来源:https://sourl.cn/apXiEy
正文如下:
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.7.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<dependencies>
<!-- Web相关 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- jsch支持 -->
<dependency>
<groupId>com.jcraft</groupId>
<artifactId>jsch</artifactId>
<version>0.1.54</version>
</dependency>
<!-- WebSocket 支持 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
<!-- 文件上传解析器 -->
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
</dependencies>
<!doctype html>
<html>
<head>
<link rel="stylesheet" href="node_modules/xterm/css/xterm.css" />
<script src="node_modules/xterm/lib/xterm.js"></script>
</head>
<body>
<div id="terminal"></div>
<script>
var term = new Terminal();
term.open(document.getElementById('terminal'));
term.write('Hello from \x1B[1;3;31mxterm.js\x1B[0m $ ')
</script>
</body>
</html>
/**
* @Description: websocket配置
* @Author: NoCortY
* @Date: 2020/3/8
*/
@Configuration
@EnableWebSocket
public class WebSSHWebSocketConfig implements WebSocketConfigurer{
@Autowired
WebSSHWebSocketHandler webSSHWebSocketHandler;
@Override
public void registerWebSocketHandlers(WebSocketHandlerRegistry webSocketHandlerRegistry) {
//socket通道
//指定处理器和路径,并设置跨域
webSocketHandlerRegistry.addHandler(webSSHWebSocketHandler, "/webssh")
.addInterceptors(new WebSocketInterceptor())
.setAllowedOrigins("*");
}
}
public class WebSocketInterceptor implements HandshakeInterceptor {
/**
* @Description: Handler处理前调用
* @Param: [serverHttpRequest, serverHttpResponse, webSocketHandler, map]
* @return: boolean
* @Author: NoCortY
* @Date: 2020/3/1
*/
@Override
public boolean beforeHandshake(ServerHttpRequest serverHttpRequest, ServerHttpResponse serverHttpResponse, WebSocketHandler webSocketHandler, Map<String, Object> map) throws Exception {
if (serverHttpRequest instanceof ServletServerHttpRequest) {
ServletServerHttpRequest request = (ServletServerHttpRequest) serverHttpRequest;
//生成一个UUID,这里由于是独立的项目,没有用户模块,所以可以用随机的UUID
//但是如果要集成到自己的项目中,需要将其改为自己识别用户的标识
String uuid = UUID.randomUUID().toString().replace("-","");
//将uuid放到websocketsession中
map.put(ConstantPool.USER_UUID_KEY, uuid);
return true;
} else {
return false;
}
}
@Override
public void afterHandshake(ServerHttpRequest serverHttpRequest, ServerHttpResponse serverHttpResponse, WebSocketHandler webSocketHandler, Exception e) {
}
}
/**
* @Description: WebSSH的WebSocket处理器
* @Author: NoCortY
* @Date: 2020/3/8
*/
@Component
public class WebSSHWebSocketHandler implements WebSocketHandler{
@Autowired
private WebSSHService webSSHService;
private Logger logger = LoggerFactory.getLogger(WebSSHWebSocketHandler.class);
/**
* @Description: 用户连接上WebSocket的回调
* @Param: [webSocketSession]
* @return: void
* @Author: Object
* @Date: 2020/3/8
*/
@Override
public void afterConnectionEstablished(WebSocketSession webSocketSession) throws Exception {
logger.info("用户:{},连接WebSSH", webSocketSession.getAttributes().get(ConstantPool.USER_UUID_KEY));
//调用初始化连接
webSSHService.initConnection(webSocketSession);
}
/**
* @Description: 收到消息的回调
* @Param: [webSocketSession, webSocketMessage]
* @return: void
* @Author: NoCortY
* @Date: 2020/3/8
*/
@Override
public void handleMessage(WebSocketSession webSocketSession, WebSocketMessage<?> webSocketMessage) throws Exception {
if (webSocketMessage instanceof TextMessage) {
logger.info("用户:{},发送命令:{}", webSocketSession.getAttributes().get(ConstantPool.USER_UUID_KEY), webSocketMessage.toString());
//调用service接收消息
webSSHService.recvHandle(((TextMessage) webSocketMessage).getPayload(), webSocketSession);
} else if (webSocketMessage instanceof BinaryMessage) {
} else if (webSocketMessage instanceof PongMessage) {
} else {
System.out.println("Unexpected WebSocket message type: " + webSocketMessage);
}
}
/**
* @Description: 出现错误的回调
* @Param: [webSocketSession, throwable]
* @return: void
* @Author: Object
* @Date: 2020/3/8
*/
@Override
public void handleTransportError(WebSocketSession webSocketSession, Throwable throwable) throws Exception {
logger.error("数据传输错误");
}
/**
* @Description: 连接关闭的回调
* @Param: [webSocketSession, closeStatus]
* @return: void
* @Author: NoCortY
* @Date: 2020/3/8
*/
@Override
public void afterConnectionClosed(WebSocketSession webSocketSession, CloseStatus closeStatus) throws Exception {
logger.info("用户:{}断开webssh连接", String.valueOf(webSocketSession.getAttributes().get(ConstantPool.USER_UUID_KEY)));
//调用service关闭连接
webSSHService.close(webSocketSession);
}
@Override
public boolean supportsPartialMessages() {
return false;
}
}
1.首先我们得先连接上终端(初始化连接)2.其次我们的服务端需要处理来自前端的消息(接收并处理前端消息)3.我们需要将终端返回的消息回写到前端(数据回写前端)4.关闭连接
/**
* @Description: WebSSH的业务逻辑
* @Author: NoCortY
* @Date: 2020/3/7
*/
public interface WebSSHService {
/**
* @Description: 初始化ssh连接
* @Param:
* @return:
* @Author: NoCortY
* @Date: 2020/3/7
*/
public void initConnection(WebSocketSession session);
/**
* @Description: 处理客户段发的数据
* @Param:
* @return:
* @Author: NoCortY
* @Date: 2020/3/7
*/
public void recvHandle(String buffer, WebSocketSession session);
/**
* @Description: 数据写回前端 for websocket
* @Param:
* @return:
* @Author: NoCortY
* @Date: 2020/3/7
*/
public void sendMessage(WebSocketSession session, byte[] buffer) throws IOException;
/**
* @Description: 关闭连接
* @Param:
* @return:
* @Author: NoCortY
* @Date: 2020/3/7
*/
public void close(WebSocketSession session);
}
public void initConnection(WebSocketSession session) {
JSch jSch = new JSch();
SSHConnectInfo sshConnectInfo = new SSHConnectInfo();
sshConnectInfo.setjSch(jSch);
sshConnectInfo.setWebSocketSession(session);
String uuid = String.valueOf(session.getAttributes().get(ConstantPool.USER_UUID_KEY));
//将这个ssh连接信息放入map中
sshMap.put(uuid, sshConnectInfo);
}
public void recvHandle(String buffer, WebSocketSession session) {
ObjectMapper objectMapper = new ObjectMapper();
WebSSHData webSSHData = null;
try {
//转换前端发送的JSON
webSSHData = objectMapper.readValue(buffer, WebSSHData.class);
} catch (IOException e) {
logger.error("Json转换异常");
logger.error("异常信息:{}", e.getMessage());
return;
}
//获取刚才设置的随机的uuid
String userId = String.valueOf(session.getAttributes().get(ConstantPool.USER_UUID_KEY));
if (ConstantPool.WEBSSH_OPERATE_CONNECT.equals(webSSHData.getOperate())) {
//如果是连接请求
//找到刚才存储的ssh连接对象
SSHConnectInfo sshConnectInfo = (SSHConnectInfo) sshMap.get(userId);
//启动线程异步处理
WebSSHData finalWebSSHData = webSSHData;
executorService.execute(new Runnable() {
@Override
public void run() {
try {
//连接到终端
connectToSSH(sshConnectInfo, finalWebSSHData, session);
} catch (JSchException | IOException e) {
logger.error("webssh连接异常");
logger.error("异常信息:{}", e.getMessage());
close(session);
}
}
});
} else if (ConstantPool.WEBSSH_OPERATE_COMMAND.equals(webSSHData.getOperate())) {
//如果是发送命令的请求
String command = webSSHData.getCommand();
SSHConnectInfo sshConnectInfo = (SSHConnectInfo) sshMap.get(userId);
if (sshConnectInfo != null) {
try {
//发送命令到终端
transToSSH(sshConnectInfo.getChannel(), command);
} catch (IOException e) {
logger.error("webssh连接异常");
logger.error("异常信息:{}", e.getMessage());
close(session);
}
}
} else {
logger.error("不支持的操作");
close(session);
}
}
public void sendMessage(WebSocketSession session, byte[] buffer) throws IOException {
session.sendMessage(new TextMessage(buffer));
}
public void close(WebSocketSession session) {
//获取随机生成的uuid
String userId = String.valueOf(session.getAttributes().get(ConstantPool.USER_UUID_KEY));
SSHConnectInfo sshConnectInfo = (SSHConnectInfo) sshMap.get(userId);
if (sshConnectInfo != null) {
//断开连接
if (sshConnectInfo.getChannel() != null) sshConnectInfo.getChannel().disconnect();
//map中移除该ssh连接信息
sshMap.remove(userId);
}
}
页面的实现
连接WebSocket并完成数据的接收并回写
数据的发送
<!doctype html>
<html>
<head>
<title>WebSSH</title>
<link rel="stylesheet" href="../css/xterm.css" />
</head>
<body>
<div id="terminal" style="width: 100%;height: 100%"></div>
<script src="../lib/jquery-3.4.1/jquery-3.4.1.min.js"></script>
<script src="../js/xterm.js" charset="utf-8"></script>
<script src="../js/webssh.js" charset="utf-8"></script>
<script src="../js/base64.js" charset="utf-8"></script>
</body>
</html>
openTerminal( {
//这里的内容可以写死,但是要整合到项目中时,需要通过参数的方式传入,可以动态连接某个终端。
operate:'connect',
host: 'ip地址',
port: '端口号',
username: '用户名',
password: '密码'
});
function openTerminal(options){
var client = new WSSHClient();
var term = new Terminal({
cols: 97,
rows: 37,
cursorBlink: true, // 光标闪烁
cursorStyle: "block", // 光标样式 null | 'block' | 'underline' | 'bar'
scrollback: 800, //回滚
tabStopWidth: 8, //制表宽度
screenKeys: true
});
term.on('data', function (data) {
//键盘输入时的回调函数
client.sendClientData(data);
});
term.open(document.getElementById('terminal'));
//在页面上显示连接中...
term.write('Connecting...');
//执行连接操作
client.connect({
onError: function (error) {
//连接失败回调
term.write('Error: ' + error + '\r\n');
},
onConnect: function () {
//连接成功回调
client.sendInitData(options);
},
onClose: function () {
//连接关闭回调
term.write("\rconnection closed");
},
onData: function (data) {
//收到数据时回调
term.write(data);
}
});
}