expect-telnet

telnet automation through expect-send sequences, like in Tcl.

Installation

$ npm install --save expect-telnet

Examples

Log the output of a command

var et = require("expect-telnet");

et("1.2.3.4:23", [
  {expect: "Username", send: "username\r"},
  {expect: "Password", send: "password\r"},
  {expect: "#"       , send: "command\r" },
  {expect: "#"       , out: function(output) {
    console.log(output);
  }, send: "exit\r"}
], function(err) {
  if (err) console.error(err);
});

Start an interactive session

var et = require("expect-telnet");

et("1.2.3.4:23", [
  {expect: "Username", send: "username\r"},
  {expect: "Password", send: "password\r"},
  {expect: "#"       , interact: true    }
], {exit: true}, function(err) {
  if (err) console.error(err);
});

API

expect-telnet(dest, seq, [opts], cb)

• dest string : Target host and port separated by a colon.
• seq array : Array of expect steps (objects).
• opts object : Options object.
• cb function: Called when an error happens.

Expect step object

• expect string / regexp : String or RegExp to expect.
• send string : String to send when expect is found.
• out function: Output function, receives the output since the previous step.
• interact boolean : Enter interacive mode with stdin/stdout. There's currently no way out of this mode, so this should be last.

Options

• timeout *number: Timeout for connection and expect sequences in milliseconds. Set to infinity for no timeout.
• exit boolean: Whether to exit the process when interacting ends.

© silverwind, distributed under BSD licence