chore: refactor split ssh and socket to individual modules

app/ssh.js

@@ -0,0 +1,89 @@
+// server
+// app/ssh.js
+"use strict"
+
+const createDebug = require("debug")
+const debug = createDebug("webssh2:ssh")
+const SSH = require("ssh2").Client
+const { sanitizeObject } = require("./utils")
+
+function SSHConnection(config) {
+  this.config = config
+  this.conn = null
+  this.stream = null
+}
+
+SSHConnection.prototype.connect = function(creds) {
+  var self = this
+  return new Promise(function(resolve, reject) {
+    debug("connect: %O", sanitizeObject(creds))
+
+    if (self.conn) {
+      self.conn.end()
+    }
+
+    self.conn = new SSH()
+    
+    var sshConfig = self.getSSHConfig(creds)
+    
+    self.conn.on("ready", function() {
+      debug("connect: ready: " + creds.host)
+      resolve()
+    })
+
+    self.conn.on("error", function(err) {
+      console.error("connect: error:" + err.message)
+      reject(err)
+    })
+
+    self.conn.connect(sshConfig)
+  })
+}
+
+SSHConnection.prototype.getSSHConfig = function(creds) {
+  return {
+    host: creds.host,
+    port: creds.port,
+    username: creds.username,
+    password: creds.password,
+    tryKeyboard: true,
+    algorithms: creds.algorithms || this.config.ssh.algorithms,
+    readyTimeout: creds.readyTimeout || this.config.ssh.readyTimeout,
+    keepaliveInterval: creds.keepaliveInterval || this.config.ssh.keepaliveInterval,
+    keepaliveCountMax: creds.keepaliveCountMax || this.config.ssh.keepaliveCountMax,
+    debug: createDebug("ssh")
+  }
+}
+
+SSHConnection.prototype.shell = function(options) {
+  var self = this
+  return new Promise(function(resolve, reject) {
+    self.conn.shell(options, function(err, stream) {
+      if (err) {
+        reject(err)
+      } else {
+        self.stream = stream
+        resolve(stream)
+      }
+    })
+  })
+}
+
+SSHConnection.prototype.resizeTerminal = function(rows, cols) {
+  if (this.stream) {
+    this.stream.setWindow(rows, cols)
+  }
+}
+
+SSHConnection.prototype.end = function() {
+  if (this.stream) {
+    this.stream.end()
+    this.stream = null
+  }
+  if (this.conn) {
+    this.conn.end()
+    this.conn = null
+  }
+}
+
+module.exports = SSHConnection