feat: support clone session

src/main/kotlin/app/termora/TerminalTabbed.kt

@@ -9,10 +9,8 @@ import app.termora.findeverywhere.BasicFilterFindEverywhereProvider
 import app.termora.findeverywhere.FindEverywhereProvider
 import app.termora.findeverywhere.FindEverywhereProviderExtension
 import app.termora.findeverywhere.FindEverywhereResult
+import app.termora.plugin.ExtensionManager
 import app.termora.plugin.internal.extension.DynamicExtensionHandler
-import app.termora.plugin.internal.sftppty.SFTPPtyProtocolProvider
-import app.termora.plugin.internal.sftppty.SFTPPtyTerminalTab
-import app.termora.plugin.internal.ssh.SSHProtocolProvider
 import app.termora.terminal.DataKey
 import com.formdev.flatlaf.FlatLaf
 import com.formdev.flatlaf.extras.components.FlatPopupMenu
@@ -24,7 +22,6 @@ import java.awt.event.ActionEvent
 import java.awt.event.MouseAdapter
 import java.awt.event.MouseEvent
 import java.beans.PropertyChangeListener
-import java.util.*
 import javax.swing.*
 import javax.swing.JTabbedPane.SCROLL_TAB_LAYOUT
 import kotlin.math.min
@@ -211,6 +208,15 @@ class TerminalTabbed(
     private fun showContextMenu(tabIndex: Int, e: MouseEvent) {
         val c = tabbedPane.getComponentAt(tabIndex) as JComponent
         val tab = tabs[tabIndex]
+        val extensions = ExtensionManager.getInstance().getExtensions(TerminalTabbedContextMenuExtension::class.java)
+        val menuItems = mutableListOf<JMenuItem>()
+        for (extension in extensions) {
+            try {
+                menuItems.add(extension.createJMenuItem(windowScope, tab))
+            } catch (_: UnsupportedOperationException) {
+                continue
+            }
+        }
 
         val popupMenu = FlatPopupMenu()
 
@@ -232,7 +238,7 @@ class TerminalTabbed(
         }
 
         // 克隆
-        val clone = popupMenu.add(I18n.getString("termora.tabbed.contextmenu.clone"))
+        val clone = popupMenu.add(I18n.getString("termora.copy"))
         clone.addActionListener { evt ->
             if (tab is HostTerminalTab) {
                 actionManager
@@ -284,14 +290,10 @@ class TerminalTabbed(
             }
         })
 
-        if (tab is HostTerminalTab) {
-            val openHostAction = actionManager.getAction(OpenHostAction.OPEN_HOST)
-            if (openHostAction != null) {
-                if (tab.host.protocol == SSHProtocolProvider.PROTOCOL || tab.host.protocol == SFTPPtyProtocolProvider.PROTOCOL) {
-                    popupMenu.addSeparator()
-                    val sftpCommand = popupMenu.add(I18n.getString("termora.tabbed.contextmenu.sftp-command"))
-                    sftpCommand.addActionListener { openSFTPPtyTab(tab, openHostAction, it) }
-                }
+        if (menuItems.isNotEmpty()) {
+            popupMenu.addSeparator()
+            for (item in menuItems) {
+                popupMenu.add(item)
             }
         }
 
@@ -383,36 +385,6 @@ class TerminalTabbed(
     }
 
 
-    private fun openSFTPPtyTab(tab: HostTerminalTab, openHostAction: Action, evt: EventObject) {
-        if (!SFTPPtyTerminalTab.canSupports) {
-            OptionPane.showMessageDialog(
-                SwingUtilities.getWindowAncestor(this),
-                I18n.getString("termora.tabbed.contextmenu.sftp-not-install"),
-                messageType = JOptionPane.ERROR_MESSAGE
-            )
-            return
-        }
-
-        var host = tab.host
-
-        if (host.protocol == SSHProtocolProvider.PROTOCOL) {
-            val envs = tab.host.options.envs().toMutableMap()
-            val currentDir = tab.getData(DataProviders.Terminal)?.getTerminalModel()
-                ?.getData(DataKey.CurrentDir, StringUtils.EMPTY) ?: StringUtils.EMPTY
-
-            if (currentDir.isNotBlank()) {
-                envs["CurrentDir"] = currentDir
-            }
-
-            host = host.copy(
-                protocol = SFTPPtyProtocolProvider.PROTOCOL,
-                options = host.options.copy(env = envs.toPropertiesString())
-            )
-        }
-
-        openHostAction.actionPerformed(OpenHostActionEvent(this, host, evt))
-    }
-
     /**
      * 对着 ToolBar 右键
      */

src/main/kotlin/app/termora/TerminalTabbedContextMenuExtension.kt

@@ -0,0 +1,12 @@
+package app.termora
+
+import app.termora.plugin.Extension
+import javax.swing.JMenuItem
+
+interface TerminalTabbedContextMenuExtension : Extension {
+
+    /**
+     * 抛出 [UnsupportedOperationException] 表示不支持
+     */
+    fun createJMenuItem(windowScope: WindowScope, tab: TerminalTab): JMenuItem
+}

src/main/kotlin/app/termora/keymgr/SSHCopyIdDialog.kt

@@ -2,6 +2,7 @@ package app.termora.keymgr
 
 import app.termora.*
 import app.termora.keyboardinteractive.TerminalUserInteraction
+import app.termora.plugin.internal.ssh.SshClients
 import app.termora.terminal.ControlCharacters
 import app.termora.terminal.DataKey
 import app.termora.terminal.PtyConnectorDelegate

src/main/kotlin/app/termora/plugin/internal/sftppty/SFTPPtyTerminalTab.kt

@@ -4,6 +4,7 @@ import app.termora.*
 import app.termora.database.DatabaseManager
 import app.termora.keymgr.KeyManager
 import app.termora.keymgr.OhKeyPairKeyPairProvider
+import app.termora.plugin.internal.ssh.SshClients
 import app.termora.terminal.*
 import com.formdev.flatlaf.util.SystemInfo
 import org.apache.commons.io.Charsets

src/main/kotlin/app/termora/plugin/internal/ssh/CloneSessionTerminalTabbedContextMenuExtension.kt

@@ -0,0 +1,44 @@
+package app.termora.plugin.internal.ssh
+
+import app.termora.I18n
+import app.termora.TerminalTab
+import app.termora.TerminalTabbedContextMenuExtension
+import app.termora.WindowScope
+import app.termora.actions.AnAction
+import app.termora.actions.AnActionEvent
+import app.termora.actions.DataProviders
+import javax.swing.JMenuItem
+
+class CloneSessionTerminalTabbedContextMenuExtension private constructor() : TerminalTabbedContextMenuExtension {
+    companion object {
+        val instance = CloneSessionTerminalTabbedContextMenuExtension()
+    }
+
+    override fun createJMenuItem(
+        windowScope: WindowScope,
+        tab: TerminalTab
+    ): JMenuItem {
+        if (tab is SSHTerminalTab) {
+            if (tab.host.protocol == SSHProtocolProvider.PROTOCOL) {
+                val cloneSession = JMenuItem(I18n.getString("termora.tabbed.contextmenu.clone-session"))
+                val c = tab.getData(SSHTerminalTab.MySshHandler)
+                cloneSession.isEnabled = c?.channel?.isOpen == true
+                if (c != null) {
+                    cloneSession.addActionListener(object : AnAction() {
+                        override fun actionPerformed(evt: AnActionEvent) {
+                            val terminalTabbedManager = evt.getData(DataProviders.TerminalTabbedManager) ?: return
+                            val handler = c.copy(channel = null)
+                            val newTab = SSHTerminalTab(windowScope, tab.host, handler)
+                            terminalTabbedManager.addTerminalTab(newTab)
+                            newTab.start()
+                        }
+                    })
+                }
+                return cloneSession
+            }
+        }
+        throw UnsupportedOperationException()
+    }
+
+
+}

src/main/kotlin/app/termora/plugin/internal/ssh/SSHInternalPlugin.kt

@@ -1,5 +1,6 @@
 package app.termora.plugin.internal.ssh
 
+import app.termora.TerminalTabbedContextMenuExtension
 import app.termora.plugin.Extension
 import app.termora.plugin.InternalPlugin
 import app.termora.protocol.ProtocolHostPanelExtension
@@ -9,6 +10,8 @@ internal class SSHInternalPlugin : InternalPlugin() {
     init {
         support.addExtension(ProtocolProviderExtension::class.java) { SSHProtocolProviderExtension.instance }
         support.addExtension(ProtocolHostPanelExtension::class.java) { SSHProtocolHostPanelExtension.instance }
+        support.addExtension(TerminalTabbedContextMenuExtension::class.java) { SftpCommandTerminalTabbedContextMenuExtension.instance }
+        support.addExtension(TerminalTabbedContextMenuExtension::class.java) { CloneSessionTerminalTabbedContextMenuExtension.instance }
     }
 
     override fun getName(): String {

src/main/kotlin/app/termora/plugin/internal/ssh/SSHTerminalTab.kt

@@ -10,41 +10,36 @@ import app.termora.keymap.KeymapManager
 import app.termora.terminal.ControlCharacters
 import app.termora.terminal.DataKey
 import app.termora.terminal.PtyConnector
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.launch
+import kotlinx.coroutines.*
 import kotlinx.coroutines.swing.Swing
 import kotlinx.coroutines.sync.Mutex
-import kotlinx.coroutines.withContext
 import org.apache.commons.io.Charsets
-import org.apache.commons.lang3.StringUtils
 import org.apache.sshd.client.SshClient
 import org.apache.sshd.client.channel.ChannelShell
 import org.apache.sshd.client.session.ClientSession
-import org.apache.sshd.common.SshConstants
-import org.apache.sshd.common.channel.Channel
-import org.apache.sshd.common.channel.ChannelListener
-import org.apache.sshd.common.session.Session
-import org.apache.sshd.common.session.SessionListener
+import org.apache.sshd.common.future.CloseFuture
+import org.apache.sshd.common.future.SshFutureListener
 import org.slf4j.LoggerFactory
 import java.nio.charset.StandardCharsets
 import javax.swing.Icon
 import javax.swing.JComponent
 import javax.swing.SwingUtilities
+import kotlin.time.Duration.Companion.milliseconds
+
+class SSHTerminalTab(
+    windowScope: WindowScope, host: Host,
+    private val handler: SshHandler = SshHandler()
+) : PtyHostTerminalTab(windowScope, host) {
 
-class SSHTerminalTab(windowScope: WindowScope, host: Host) :
-    PtyHostTerminalTab(windowScope, host) {
     companion object {
         val SSHSession = DataKey(ClientSession::class)
-
+        internal val MySshHandler = DataKey(SshHandler::class)
         private val log = LoggerFactory.getLogger(SSHTerminalTab::class.java)
     }
 
     private val mutex = Mutex()
-    private val tab = this
-
-    private var sshClient: SshClient? = null
-    private var sshSession: ClientSession? = null
-    private var sshChannelShell: ChannelShell? = null
+    private val owner get() = SwingUtilities.getWindowAncestor(terminalPanel)
+    private val tab get() = this
 
     init {
         terminalPanel.dropFiles = false
@@ -55,12 +50,10 @@ class SSHTerminalTab(windowScope: WindowScope, host: Host) :
         return terminalPanel
     }
 
-
     override fun canReconnect(): Boolean {
-        return !mutex.isLocked
+        return mutex.isLocked.not()
     }
 
-
     override suspend fun openPtyConnector(): PtyConnector {
         if (mutex.tryLock()) {
             try {
@@ -82,74 +75,32 @@ class SSHTerminalTab(windowScope: WindowScope, host: Host) :
             // hide cursor
             terminalModel.setData(DataKey.Companion.ShowCursor, false)
             // print
-            terminal.write("SSH client is opening...\r\n")
+            terminal.write("Connecting to remote server ")
         }
 
-        val owner = SwingUtilities.getWindowAncestor(terminalPanel)
-        val client = SshClients.openClient(host, owner).also { sshClient = it }
-        val sessionListener = MySessionListener()
-        val channelListener = MyChannelListener()
-
-        withContext(Dispatchers.Swing) { terminal.write("SSH client opened successfully.\r\n\r\n") }
-
-        client.addSessionListener(sessionListener)
-        client.addChannelListener(channelListener)
-
-        val (session, channel) = try {
-            val session = SshClients.openSession(host, client).also { sshSession = it }
-            val channel = SshClients.openShell(
-                host,
-                terminalPanel.winSize(),
-                session
-            ).also { sshChannelShell = it }
-            Pair(session, channel)
-        } finally {
-            client.removeSessionListener(sessionListener)
-            client.removeChannelListener(channelListener)
-        }
-
-        // newline
-        withContext(Dispatchers.Swing) {
-            terminal.write("\r\n")
-        }
-
-
-        channel.addChannelListener(object : ChannelListener {
-            private val reconnectShortcut
-                get() = KeymapManager.Companion.getInstance().getActiveKeymap()
-                    .getShortcut(TabReconnectAction.Companion.RECONNECT_TAB).firstOrNull()
-
-            override fun channelClosed(channel: Channel, reason: Throwable?) {
-                coroutineScope.launch(Dispatchers.Swing) {
-                    terminal.write("\r\n\r\n${ControlCharacters.Companion.ESC}[31m")
-                    terminal.write(I18n.getString("termora.terminal.channel-disconnected"))
-                    if (reconnectShortcut is KeyShortcut) {
-                        terminal.write(
-                            I18n.getString(
-                                "termora.terminal.channel-reconnect",
-                                reconnectShortcut.toString()
-                            )
-                        )
-                    }
-                    terminal.write("\r\n")
-                    terminal.write("${ControlCharacters.Companion.ESC}[0m")
-                    terminalModel.setData(DataKey.Companion.ShowCursor, false)
-                    if (DatabaseManager.getInstance().terminal.autoCloseTabWhenDisconnected) {
-                        terminalTabbedManager?.let { manager ->
-                            SwingUtilities.invokeLater {
-                                manager.closeTerminalTab(tab, true)
-                            }
-                        }
-                    }
-
-                    // stop
-                    stop()
-                }
+        val loading = coroutineScope.launch(Dispatchers.Swing) {
+            var c = 0
+            while (isActive) {
+                if (++c > 6) c = 1
+                terminal.write("${ControlCharacters.ESC}[1;32m")
+                terminal.write(".".repeat(c))
+                terminal.write(" ".repeat(6 - c))
+                terminal.write("${ControlCharacters.ESC}[0m")
+                delay(350.milliseconds)
+                terminal.write("${ControlCharacters.BS}".repeat(6))
             }
-        })
+        }
 
-        // 打开隧道
-        openTunnelings(session, host)
+        val channel: ChannelShell
+        try {
+            val client = openClient()
+            val session = openSession(client)
+            channel = openChannel(session)
+            // 打开隧道
+            openTunnelings(session, host)
+        } finally {
+            loading.cancel()
+        }
 
         // 隐藏提示
         withContext(Dispatchers.Swing) {
@@ -194,10 +145,68 @@ class SSHTerminalTab(windowScope: WindowScope, host: Host) :
         }
     }
 
+    private fun openClient(): SshClient {
+        val client = handler.client
+        if (client != null) return client
+        return SshClients.openClient(host, owner).also { handler.client = it }
+    }
+
+    private fun openSession(client: SshClient): ClientSession {
+        val session = handler.session
+        if (session != null) return SshSessionPool.register(session, client)
+        return SshClients.openSession(host, client).also { handler.session = SshSessionPool.register(it, client) }
+    }
+
+    private fun openChannel(session: ClientSession): ChannelShell {
+        val channel = SshClients.openShell(host, terminalPanel.winSize(), session)
+        handler.channel = channel
+
+        channel.addCloseFutureListener(object : SshFutureListener<CloseFuture> {
+            private val reconnectShortcut
+                get() = KeymapManager.Companion.getInstance().getActiveKeymap()
+                    .getShortcut(TabReconnectAction.Companion.RECONNECT_TAB).firstOrNull()
+            private val autoCloseTabWhenDisconnected get() = DatabaseManager.getInstance().terminal.autoCloseTabWhenDisconnected
+
+            override fun operationComplete(future: CloseFuture) {
+                coroutineScope.launch(Dispatchers.Swing) {
+                    terminal.write("\r\n\r\n${ControlCharacters.Companion.ESC}[31m")
+                    terminal.write(I18n.getString("termora.terminal.channel-disconnected"))
+                    if (reconnectShortcut is KeyShortcut) {
+                        terminal.write(
+                            I18n.getString(
+                                "termora.terminal.channel-reconnect",
+                                reconnectShortcut.toString()
+                            )
+                        )
+                    }
+                    terminal.write("\r\n")
+                    terminal.write("${ControlCharacters.Companion.ESC}[0m")
+                    terminalModel.setData(DataKey.Companion.ShowCursor, false)
+
+                    if (autoCloseTabWhenDisconnected) {
+                        terminalTabbedManager?.let { manager ->
+                            SwingUtilities.invokeLater {
+                                manager.closeTerminalTab(tab, true)
+                            }
+                        }
+                    }
+
+                    // stop
+                    stop()
+                }
+            }
+        })
+
+        return channel
+    }
+
     @Suppress("UNCHECKED_CAST")
     override fun <T : Any> getData(dataKey: DataKey<T>): T? {
         if (dataKey == SSHSession) {
-            return sshSession as T?
+            return handler.session as T?
+        }
+        if (dataKey == MySshHandler) {
+            return handler as T?
         }
         return super.getData(dataKey)
     }
@@ -206,16 +215,7 @@ class SSHTerminalTab(windowScope: WindowScope, host: Host) :
         if (mutex.tryLock()) {
             try {
                 super.stop()
-
-                sshChannelShell?.close(true)
-                sshSession?.disableSessionHeartbeat()
-                sshSession?.disconnect(SshConstants.SSH2_DISCONNECT_BY_APPLICATION, StringUtils.EMPTY)
-                sshSession?.close(true)
-                sshClient?.close(true)
-
-                sshChannelShell = null
-                sshSession = null
-                sshClient = null
+                handler.close()
             } finally {
                 mutex.unlock()
             }
@@ -231,36 +231,4 @@ class SSHTerminalTab(windowScope: WindowScope, host: Host) :
         terminalPanel.storeVisualWindows(host.id)
     }
 
-    private inner class MySessionListener : SessionListener, Disposable {
-        override fun sessionEvent(session: Session, event: SessionListener.Event) {
-            coroutineScope.launch {
-                when (event) {
-                    SessionListener.Event.KeyEstablished -> terminal.write("Session Key exchange successful.\r\n")
-                    SessionListener.Event.Authenticated -> terminal.write("Session authentication successful.\r\n\r\n")
-                    SessionListener.Event.KexCompleted -> terminal.write("Session KEX negotiation successful.\r\n")
-                }
-            }
-        }
-
-        override fun sessionEstablished(session: Session) {
-            coroutineScope.launch { terminal.write("Session established.\r\n") }
-        }
-
-        override fun sessionCreated(session: Session?) {
-            coroutineScope.launch { terminal.write("Session created.\r\n") }
-        }
-
-
-    }
-
-    private inner class MyChannelListener : ChannelListener, Disposable {
-        override fun channelOpenSuccess(channel: Channel) {
-            coroutineScope.launch { terminal.write("Channel shell opened successfully.\r\n") }
-        }
-
-        override fun channelInitialized(channel: Channel) {
-            coroutineScope.launch { terminal.write("Channel shell initialization successful.\r\n") }
-        }
-
-    }
 }

src/main/kotlin/app/termora/plugin/internal/ssh/SftpCommandTerminalTabbedContextMenuExtension.kt

@@ -0,0 +1,72 @@
+package app.termora.plugin.internal.ssh
+
+import app.termora.*
+import app.termora.actions.*
+import app.termora.plugin.internal.sftppty.SFTPPtyProtocolProvider
+import app.termora.plugin.internal.sftppty.SFTPPtyTerminalTab
+import app.termora.terminal.DataKey
+import org.apache.commons.lang3.StringUtils
+import java.util.*
+import javax.swing.Action
+import javax.swing.JMenuItem
+import javax.swing.JOptionPane
+
+class SftpCommandTerminalTabbedContextMenuExtension private constructor() : TerminalTabbedContextMenuExtension {
+    companion object {
+        val instance = SftpCommandTerminalTabbedContextMenuExtension()
+    }
+
+    private val actionManager = ActionManager.getInstance()
+
+    override fun createJMenuItem(
+        windowScope: WindowScope,
+        tab: TerminalTab
+    ): JMenuItem {
+        if (tab is HostTerminalTab) {
+            val openHostAction = actionManager.getAction(OpenHostAction.OPEN_HOST)
+            if (openHostAction != null) {
+                if (tab.host.protocol == SSHProtocolProvider.PROTOCOL || tab.host.protocol == SFTPPtyProtocolProvider.PROTOCOL) {
+                    val sftpCommand = JMenuItem(I18n.getString("termora.tabbed.contextmenu.sftp-command"))
+                    sftpCommand.addActionListener(object : AnAction() {
+                        override fun actionPerformed(evt: AnActionEvent) {
+                            openSFTPPtyTab(tab, openHostAction, evt)
+                        }
+                    })
+                    return sftpCommand
+                }
+            }
+        }
+        throw UnsupportedOperationException()
+    }
+
+    private fun openSFTPPtyTab(tab: HostTerminalTab, openHostAction: Action, evt: EventObject) {
+        if (SFTPPtyTerminalTab.canSupports.not()) {
+            OptionPane.showMessageDialog(
+                tab.windowScope.window,
+                I18n.getString("termora.tabbed.contextmenu.sftp-not-install"),
+                messageType = JOptionPane.ERROR_MESSAGE
+            )
+            return
+        }
+
+        var host = tab.host
+
+        if (host.protocol == SSHProtocolProvider.PROTOCOL) {
+            val envs = tab.host.options.envs().toMutableMap()
+            val currentDir = tab.getData(DataProviders.Terminal)?.getTerminalModel()
+                ?.getData(DataKey.CurrentDir, StringUtils.EMPTY) ?: StringUtils.EMPTY
+
+            if (currentDir.isNotBlank()) {
+                envs["CurrentDir"] = currentDir
+            }
+
+            host = host.copy(
+                protocol = SFTPPtyProtocolProvider.PROTOCOL,
+                options = host.options.copy(env = envs.toPropertiesString())
+            )
+        }
+
+        openHostAction.actionPerformed(OpenHostActionEvent(evt.source, host, evt))
+    }
+
+}

src/main/kotlin/app/termora/plugin/internal/ssh/SshClients.kt

@@ -1,5 +1,6 @@
-package app.termora
+package app.termora.plugin.internal.ssh
 
+import app.termora.*
 import app.termora.keyboardinteractive.TerminalUserInteraction
 import app.termora.keymgr.OhKeyPairKeyPairProvider
 import app.termora.terminal.TerminalSize
@@ -29,7 +30,6 @@ import org.apache.sshd.client.session.ClientSession
 import org.apache.sshd.client.session.ClientSessionImpl
 import org.apache.sshd.client.session.SessionFactory
 import org.apache.sshd.common.AttributeRepository
-import org.apache.sshd.common.SshConstants
 import org.apache.sshd.common.SshException
 import org.apache.sshd.common.channel.ChannelFactory
 import org.apache.sshd.common.channel.PtyChannelConfiguration
@@ -63,7 +63,7 @@ import org.eclipse.jgit.internal.transport.sshd.proxy.AbstractClientProxyConnect
 import org.eclipse.jgit.internal.transport.sshd.proxy.HttpClientConnector
 import org.eclipse.jgit.internal.transport.sshd.proxy.Socks5ClientConnector
 import org.eclipse.jgit.transport.CredentialsProvider
-import org.eclipse.jgit.transport.SshConstants.IDENTITY_AGENT
+import org.eclipse.jgit.transport.SshConstants
 import org.eclipse.jgit.transport.sshd.IdentityPasswordProvider
 import org.eclipse.jgit.transport.sshd.agent.ConnectorFactory
 import org.slf4j.LoggerFactory
@@ -89,7 +89,7 @@ object SshClients {
     val HOST_KEY = AttributeRepository.AttributeKey<Host>()
 
     private val timeout = Duration.ofSeconds(30)
-    private val hostManager get() = HostManager.getInstance()
+    private val hostManager get() = HostManager.Companion.getInstance()
     private val log by lazy { LoggerFactory.getLogger(SshClients::class.java) }
 
     /**
@@ -166,7 +166,7 @@ object SshClients {
         }
 
         val jumpHosts = mutableListOf<Host>()
-        val hosts = HostManager.getInstance().hosts().associateBy { it.id }
+        val hosts = HostManager.Companion.getInstance().hosts().associateBy { it.id }
         for (jumpHostId in h.options.jumpHosts) {
             val e = hosts[jumpHostId]
             if (e == null) {
@@ -235,16 +235,16 @@ object SshClients {
             if (SystemInfo.isMacOS) {
                 val file = FileUtils.getFile(Application.getBaseDataDir(), "config", "ssh-agent.sock")
                 if (file.exists()) {
-                    entry.setProperty(IDENTITY_AGENT, file.absolutePath)
+                    entry.setProperty(SshConstants.IDENTITY_AGENT, file.absolutePath)
                 }
             }
-            if (entry.getProperty(IDENTITY_AGENT).isNullOrBlank()) {
+            if (entry.getProperty(SshConstants.IDENTITY_AGENT).isNullOrBlank()) {
                 if (host.authentication.password.isNotBlank())
-                    entry.setProperty(IDENTITY_AGENT, host.authentication.password)
+                    entry.setProperty(SshConstants.IDENTITY_AGENT, host.authentication.password)
                 else if (SystemInfo.isWindows)
-                    entry.setProperty(IDENTITY_AGENT, PageantConnector.DESCRIPTOR.identityAgent)
+                    entry.setProperty(SshConstants.IDENTITY_AGENT, PageantConnector.DESCRIPTOR.identityAgent)
                 else
-                    entry.setProperty(IDENTITY_AGENT, UnixDomainSocketConnector.DESCRIPTOR.identityAgent)
+                    entry.setProperty(SshConstants.IDENTITY_AGENT, UnixDomainSocketConnector.DESCRIPTOR.identityAgent)
             }
         }
 
@@ -272,7 +272,7 @@ object SshClients {
                 throw SshException("Authentication failed")
             }
         } catch (e: Exception) {
-            if (e !is SshException || e.disconnectCode != SshConstants.SSH2_DISCONNECT_NO_MORE_AUTH_METHODS_AVAILABLE) throw e
+            if (e !is SshException || e.disconnectCode != org.apache.sshd.common.SshConstants.SSH2_DISCONNECT_NO_MORE_AUTH_METHODS_AVAILABLE) throw e
             val owner = client.properties["owner"] as Window? ?: throw e
             val askUserInfo = ask(host, entry, owner) ?: throw e
             if (askUserInfo.authentication.type == AuthenticationType.No) throw e
@@ -383,7 +383,7 @@ object SshClients {
 
         val channelFactories = mutableListOf<ChannelFactory>()
         channelFactories.addAll(ClientBuilder.DEFAULT_CHANNEL_FACTORIES)
-        channelFactories.add(X11ChannelFactory.INSTANCE)
+        channelFactories.add(X11ChannelFactory.Companion.INSTANCE)
         builder.channelFactories(channelFactories)
 
         val sshClient = builder.build() as JGitSshClient
@@ -726,4 +726,3 @@ object SshClients {
     }
 
 }
-

src/main/kotlin/app/termora/plugin/internal/ssh/SshHandler.kt

@@ -0,0 +1,27 @@
+package app.termora.plugin.internal.ssh
+
+import org.apache.sshd.client.SshClient
+import org.apache.sshd.client.session.ClientSession
+import org.apache.sshd.common.channel.Channel
+
+data class SshHandler(
+    var client: SshClient? = null,
+    var session: ClientSession? = null,
+    var channel: Channel? = null
+) : AutoCloseable {
+    override fun close() {
+
+        channel?.close(true)?.await()
+        session?.close(true)?.await()
+
+        channel = null
+        session = null
+
+
+        // client 由 SshSessionPool 负责关闭
+        if (client?.isClosing == true || client?.isClosed == true) {
+            client = null
+        }
+
+    }
+}

src/main/kotlin/app/termora/plugin/internal/ssh/SshSessionPool.kt

@@ -0,0 +1,394 @@
+package app.termora.plugin.internal.ssh
+
+import org.apache.sshd.client.SshClient
+import org.apache.sshd.client.channel.ChannelExec
+import org.apache.sshd.client.channel.ChannelShell
+import org.apache.sshd.client.session.ClientSession
+import org.apache.sshd.client.session.forward.DynamicPortForwardingTracker
+import org.apache.sshd.client.session.forward.ExplicitPortForwardingTracker
+import org.apache.sshd.common.AttributeRepository
+import org.apache.sshd.common.channel.Channel
+import org.apache.sshd.common.channel.PtyChannelConfigurationHolder
+import org.apache.sshd.common.channel.throttle.ChannelStreamWriter
+import org.apache.sshd.common.channel.throttle.ChannelStreamWriterResolver
+import org.apache.sshd.common.future.CloseFuture
+import org.apache.sshd.common.future.DefaultCloseFuture
+import org.apache.sshd.common.io.IoWriteFuture
+import org.apache.sshd.common.session.SessionHeartbeatController
+import org.apache.sshd.common.util.buffer.Buffer
+import org.apache.sshd.common.util.net.SshdSocketAddress
+import java.io.OutputStream
+import java.net.SocketAddress
+import java.nio.charset.Charset
+import java.time.Duration
+import java.util.*
+import java.util.concurrent.TimeUnit
+import java.util.concurrent.atomic.AtomicInteger
+import java.util.function.Function
+
+internal object SshSessionPool {
+    private val map = WeakHashMap<ClientSession, MyClientSession>()
+
+    fun register(session: ClientSession, client: SshClient): ClientSession {
+        if (session is MyClientSession) {
+            session.refCount.incrementAndGet()
+            return session
+        }
+
+        synchronized(session) {
+            val delegate = map[session] ?: MyClientSession(client, session)
+            map[session] = delegate
+            delegate.refCount.incrementAndGet()
+            return delegate
+        }
+    }
+
+
+    private class MyClientSession(
+        private val client: SshClient,
+        private val delegate: ClientSession
+    ) : ClientSession by delegate {
+        val refCount = AtomicInteger(0)
+
+        override fun createShellChannel(): ChannelShell? {
+            return delegate.createShellChannel()
+        }
+
+        override fun createExecChannel(command: String?): ChannelExec? {
+            return delegate.createExecChannel(command)
+        }
+
+        override fun createExecChannel(
+            command: String?,
+            ptyConfig: PtyChannelConfigurationHolder?,
+            env: Map<String?, *>?
+        ): ChannelExec? {
+            return delegate.createExecChannel(command, ptyConfig, env)
+        }
+
+        override fun executeRemoteCommand(command: String?): String? {
+            return delegate.executeRemoteCommand(command)
+        }
+
+        override fun executeRemoteCommand(
+            command: String?,
+            stderr: OutputStream?,
+            charset: Charset?
+        ): String? {
+            return delegate.executeRemoteCommand(command, stderr, charset)
+        }
+
+        override fun executeRemoteCommand(
+            command: String?,
+            stdout: OutputStream?,
+            stderr: OutputStream?,
+            charset: Charset?
+        ) {
+            delegate.executeRemoteCommand(command, stdout, stderr, charset)
+        }
+
+        override fun createLocalPortForwardingTracker(
+            localPort: Int,
+            remote: SshdSocketAddress?
+        ): ExplicitPortForwardingTracker? {
+            return delegate.createLocalPortForwardingTracker(localPort, remote)
+        }
+
+        override fun createLocalPortForwardingTracker(
+            local: SshdSocketAddress?,
+            remote: SshdSocketAddress?
+        ): ExplicitPortForwardingTracker? {
+            return delegate.createLocalPortForwardingTracker(local, remote)
+        }
+
+        override fun createRemotePortForwardingTracker(
+            remote: SshdSocketAddress?,
+            local: SshdSocketAddress?
+        ): ExplicitPortForwardingTracker? {
+            return delegate.createRemotePortForwardingTracker(remote, local)
+        }
+
+        override fun createDynamicPortForwardingTracker(local: SshdSocketAddress?): DynamicPortForwardingTracker? {
+            return delegate.createDynamicPortForwardingTracker(local)
+        }
+
+        override fun waitFor(
+            mask: Collection<ClientSession.ClientSessionEvent?>?,
+            timeout: Duration?
+        ): Set<ClientSession.ClientSessionEvent?>? {
+            return delegate.waitFor(mask, timeout)
+        }
+
+        override fun createBuffer(cmd: Byte): Buffer? {
+            return delegate.createBuffer(cmd)
+        }
+
+        override fun writePacket(
+            buffer: Buffer?,
+            timeout: Duration?
+        ): IoWriteFuture? {
+            return delegate.writePacket(buffer, timeout)
+        }
+
+        override fun writePacket(
+            buffer: Buffer?,
+            maxWaitMillis: Long
+        ): IoWriteFuture? {
+            return delegate.writePacket(buffer, maxWaitMillis)
+        }
+
+        override fun request(
+            request: String?,
+            buffer: Buffer?,
+            timeout: Long,
+            unit: TimeUnit?
+        ): Buffer? {
+            return delegate.request(request, buffer, timeout, unit)
+        }
+
+        override fun request(
+            request: String?,
+            buffer: Buffer?,
+            timeout: Duration?
+        ): Buffer? {
+            return delegate.request(request, buffer, timeout)
+        }
+
+        override fun getLocalAddress(): SocketAddress? {
+            return delegate.getLocalAddress()
+        }
+
+        override fun getRemoteAddress(): SocketAddress? {
+            return delegate.getRemoteAddress()
+        }
+
+        override fun <T : Any?> resolveAttribute(key: AttributeRepository.AttributeKey<T?>?): T? {
+            return delegate.resolveAttribute(key)
+        }
+
+        override fun getSessionHeartbeatType(): SessionHeartbeatController.HeartbeatType? {
+            return delegate.getSessionHeartbeatType()
+        }
+
+        override fun getSessionHeartbeatInterval(): Duration? {
+            return delegate.getSessionHeartbeatInterval()
+        }
+
+        override fun disableSessionHeartbeat() {
+            delegate.disableSessionHeartbeat()
+        }
+
+        override fun setSessionHeartbeat(
+            type: SessionHeartbeatController.HeartbeatType?,
+            unit: TimeUnit?,
+            count: Long
+        ) {
+            delegate.setSessionHeartbeat(type, unit, count)
+        }
+
+        override fun setSessionHeartbeat(
+            type: SessionHeartbeatController.HeartbeatType?,
+            interval: Duration?
+        ) {
+            delegate.setSessionHeartbeat(type, interval)
+        }
+
+        override fun isEmpty(): Boolean {
+            return delegate.isEmpty()
+        }
+
+        override fun getLongProperty(name: String?, def: Long): Long {
+            return delegate.getLongProperty(name, def)
+        }
+
+        override fun getLong(name: String?): Long? {
+            return delegate.getLong(name)
+        }
+
+        override fun getIntProperty(name: String?, def: Int): Int {
+            return delegate.getIntProperty(name, def)
+        }
+
+        override fun getInteger(name: String?): Int? {
+            return delegate.getInteger(name)
+        }
+
+        override fun getBooleanProperty(name: String?, def: Boolean): Boolean {
+            return delegate.getBooleanProperty(name, def)
+        }
+
+        override fun getBoolean(name: String?): Boolean? {
+            return delegate.getBoolean(name)
+        }
+
+        override fun getStringProperty(name: String?, def: String?): String? {
+            return delegate.getStringProperty(name, def)
+        }
+
+        override fun getString(name: String?): String? {
+            return delegate.getString(name)
+        }
+
+        override fun getObject(name: String?): Any? {
+            return delegate.getObject(name)
+        }
+
+        override fun getCharset(
+            name: String?,
+            defaultValue: Charset?
+        ): Charset? {
+            return delegate.getCharset(name, defaultValue)
+        }
+
+        override fun <T : Any?> computeAttributeIfAbsent(
+            key: AttributeRepository.AttributeKey<T?>?,
+            resolver: Function<in AttributeRepository.AttributeKey<T>, out T?>?
+        ): T? {
+            return delegate.computeAttributeIfAbsent(key, resolver)
+        }
+
+        override fun close() {
+            close(true)?.await()
+        }
+
+        override fun close(immediately: Boolean): CloseFuture? {
+            synchronized(delegate) {
+                if (refCount.decrementAndGet() < 1) {
+                    delegate.close(immediately).await()
+                    return client.close(immediately)
+                }
+            }
+            return DefaultCloseFuture(this, this).apply { setClosed() }
+        }
+
+        override fun isOpen(): Boolean {
+            return delegate.isOpen()
+        }
+
+        override fun getCipherFactoriesNameList(): String? {
+            return delegate.getCipherFactoriesNameList()
+        }
+
+        override fun getCipherFactoriesNames(): List<String?>? {
+            return delegate.getCipherFactoriesNames()
+        }
+
+        override fun setCipherFactoriesNameList(names: String?) {
+            delegate.setCipherFactoriesNameList(names)
+        }
+
+        override fun setCipherFactoriesNames(vararg names: String?) {
+            delegate.setCipherFactoriesNames(*names)
+        }
+
+        override fun setCipherFactoriesNames(names: Collection<String?>?) {
+            delegate.setCipherFactoriesNames(names)
+        }
+
+        override fun getCompressionFactoriesNameList(): String? {
+            return delegate.getCompressionFactoriesNameList()
+        }
+
+        override fun getCompressionFactoriesNames(): List<String?>? {
+            return delegate.getCompressionFactoriesNames()
+        }
+
+        override fun setCompressionFactoriesNameList(names: String?) {
+            delegate.setCompressionFactoriesNameList(names)
+        }
+
+        override fun setCompressionFactoriesNames(vararg names: String?) {
+            delegate.setCompressionFactoriesNames(*names)
+        }
+
+        override fun setCompressionFactoriesNames(names: Collection<String?>?) {
+            delegate.setCompressionFactoriesNames(names)
+        }
+
+        override fun getMacFactoriesNameList(): String? {
+            return delegate.getMacFactoriesNameList()
+        }
+
+        override fun getMacFactoriesNames(): List<String?>? {
+            return delegate.getMacFactoriesNames()
+        }
+
+        override fun setMacFactoriesNameList(names: String?) {
+            delegate.setMacFactoriesNameList(names)
+        }
+
+        override fun setMacFactoriesNames(vararg names: String?) {
+            delegate.setMacFactoriesNames(*names)
+        }
+
+        override fun setMacFactoriesNames(names: Collection<String?>?) {
+            delegate.setMacFactoriesNames(names)
+        }
+
+        override fun setSignatureFactoriesNameList(names: String?) {
+            delegate.setSignatureFactoriesNameList(names)
+        }
+
+        override fun setSignatureFactoriesNames(vararg names: String?) {
+            delegate.setSignatureFactoriesNames(*names)
+        }
+
+        override fun setSignatureFactoriesNames(names: Collection<String?>?) {
+            delegate.setSignatureFactoriesNames(names)
+        }
+
+        override fun getSignatureFactoriesNameList(): String? {
+            return delegate.getSignatureFactoriesNameList()
+        }
+
+        override fun getSignatureFactoriesNames(): List<String?>? {
+            return delegate.getSignatureFactoriesNames()
+        }
+
+        override fun resolveChannelStreamWriterResolver(): ChannelStreamWriterResolver? {
+            return delegate.resolveChannelStreamWriterResolver()
+        }
+
+        override fun resolveChannelStreamWriter(
+            channel: Channel?,
+            cmd: Byte
+        ): ChannelStreamWriter? {
+            return delegate.resolveChannelStreamWriter(channel, cmd)
+        }
+
+        override fun isLocalPortForwardingStartedForPort(port: Int): Boolean {
+            return delegate.isLocalPortForwardingStartedForPort(port)
+        }
+
+        override fun isRemotePortForwardingStartedForPort(port: Int): Boolean {
+            return delegate.isRemotePortForwardingStartedForPort(port)
+        }
+
+        override fun setUserAuthFactoriesNames(names: Collection<String?>?) {
+            delegate.setUserAuthFactoriesNames(names)
+        }
+
+        override fun setUserAuthFactoriesNames(vararg names: String?) {
+            delegate.setUserAuthFactoriesNames(*names)
+        }
+
+        override fun getUserAuthFactoriesNameList(): String? {
+            return delegate.getUserAuthFactoriesNameList()
+        }
+
+        override fun getUserAuthFactoriesNames(): List<String?>? {
+            return delegate.getUserAuthFactoriesNames()
+        }
+
+        override fun setUserAuthFactoriesNameList(names: String?) {
+            delegate.setUserAuthFactoriesNameList(names)
+        }
+
+        override fun startLocalPortForwarding(
+            localPort: Int,
+            remote: SshdSocketAddress?
+        ): SshdSocketAddress? {
+            return delegate.startLocalPortForwarding(localPort, remote)
+        }
+    }
+}

src/main/kotlin/app/termora/terminal/panel/vw/NvidiaSMIVisualWindow.kt

@@ -3,8 +3,8 @@ package app.termora.terminal.panel.vw
 import app.termora.Disposer
 import app.termora.I18n
 import app.termora.Icons
-import app.termora.SshClients
 import app.termora.plugin.internal.ssh.SSHTerminalTab
+import app.termora.plugin.internal.ssh.SshClients
 import com.formdev.flatlaf.extras.FlatSVGIcon
 import com.jgoodies.forms.builder.FormBuilder
 import com.jgoodies.forms.layout.FormLayout
@@ -28,7 +28,7 @@ import javax.xml.parsers.DocumentBuilderFactory
 import javax.xml.xpath.XPathFactory
 import kotlin.time.Duration.Companion.milliseconds
 
-class NvidiaSMIVisualWindow(tab: SSHTerminalTab, visualWindowManager: VisualWindowManager) :
+internal class NvidiaSMIVisualWindow(tab: SSHTerminalTab, visualWindowManager: VisualWindowManager) :
     SSHVisualWindow(tab, "NVIDIA-SMI", visualWindowManager) {
 
     companion object {

src/main/kotlin/app/termora/terminal/panel/vw/SystemInformationVisualWindow.kt

@@ -1,7 +1,11 @@
 package app.termora.terminal.panel.vw
 
-import app.termora.*
+import app.termora.Disposer
+import app.termora.DynamicColor
+import app.termora.I18n
+import app.termora.formatBytes
 import app.termora.plugin.internal.ssh.SSHTerminalTab
+import app.termora.plugin.internal.ssh.SshClients
 import com.jgoodies.forms.builder.FormBuilder
 import com.jgoodies.forms.layout.FormLayout
 import kotlinx.coroutines.Dispatchers
@@ -16,7 +20,7 @@ import javax.swing.table.DefaultTableCellRenderer
 import javax.swing.table.DefaultTableModel
 
 
-class SystemInformationVisualWindow(tab: SSHTerminalTab, visualWindowManager: VisualWindowManager) :
+internal class SystemInformationVisualWindow(tab: SSHTerminalTab, visualWindowManager: VisualWindowManager) :
     SSHVisualWindow(tab, "SystemInformation", visualWindowManager) {
 
     companion object {

src/main/kotlin/app/termora/terminal/panel/vw/TransferVisualWindow.kt

@@ -38,7 +38,7 @@ import kotlin.reflect.cast
 import kotlin.time.Duration.Companion.milliseconds
 
 
-class TransferVisualWindow(tab: SSHTerminalTab, visualWindowManager: VisualWindowManager) :
+internal class TransferVisualWindow(tab: SSHTerminalTab, visualWindowManager: VisualWindowManager) :
     SSHVisualWindow(tab, "Transfer", visualWindowManager) {
 
     companion object {

src/main/kotlin/app/termora/transfer/internal/sftp/SFTPTransferProtocolProvider.kt

@@ -1,6 +1,6 @@
 package app.termora.transfer.internal.sftp
 
-import app.termora.SshClients
+import app.termora.plugin.internal.ssh.SshClients
 import app.termora.protocol.PathHandler
 import app.termora.protocol.PathHandlerRequest
 import app.termora.protocol.TransferProtocolProvider

src/main/resources/i18n/messages.properties

@@ -258,6 +258,7 @@ termora.tabbed.contextmenu.rename=Rename
 termora.tabbed.contextmenu.sftp-command=SFTP Command
 termora.tabbed.contextmenu.sftp-not-install=SFTP programme not found, please install and try again
 termora.tabbed.contextmenu.clone=Clone
+termora.tabbed.contextmenu.clone-session=Clone Session
 termora.tabbed.contextmenu.open-in-new-window=Open in New Window
 termora.tabbed.contextmenu.close=Close
 termora.tabbed.contextmenu.close-other-tabs=Close Other Tabs

src/main/resources/i18n/messages_zh_CN.properties

@@ -253,6 +253,7 @@ termora.tabbed.contextmenu.rename=重命名
 termora.tabbed.contextmenu.sftp-command=SFTP 终端
 termora.tabbed.contextmenu.sftp-not-install=没有找到 SFTP 程序，请安装后重试
 termora.tabbed.contextmenu.clone=克隆
+termora.tabbed.contextmenu.clone-session=克隆会话
 termora.tabbed.contextmenu.open-in-new-window=在新窗口打开
 termora.tabbed.contextmenu.close=关闭
 termora.tabbed.contextmenu.close-other-tabs=关闭其他标签页

src/main/resources/i18n/messages_zh_TW.properties

@@ -248,6 +248,7 @@ termora.tabbed.contextmenu.rename=重新命名
 termora.tabbed.contextmenu.sftp-command=SFTP 終端
 termora.tabbed.contextmenu.sftp-not-install=沒有找到 SFTP 程序，請安裝後重試
 termora.tabbed.contextmenu.clone=克隆
+termora.tabbed.contextmenu.clone-session=克隆會話
 termora.tabbed.contextmenu.open-in-new-window=在新視窗打開
 termora.tabbed.contextmenu.close=關閉
 termora.tabbed.contextmenu.close-other-tabs=關閉其他標籤頁

src/test/kotlin/app/termora/SSHDTest.kt

@@ -1,5 +1,6 @@
 package app.termora
 
+import app.termora.plugin.internal.ssh.SshClients
 import org.apache.sshd.client.session.ClientSession
 import org.testcontainers.containers.GenericContainer
 import kotlin.test.AfterTest