什么是用nodejs和powershell清除telnet流的正确方法？
问题描述：
我有一个整洁的小nodejs脚本以文本模式（主要是telnet）登录到原始套接字。我注意到有些服务器会发送打印重定位，但我的程序必须忽略某种类似的cls等效;因为重新定位的文本只是简单地打印现有文本，留下新旧输出的乱码。如何接受和处理任何telnet字符序列用于清除以下程序的输出？什么是用nodejs和powershell清除telnet流的正确方法？
var net = require("net");
var argv = process.argv.slice(2);
var client = null;
var echo = false;
var hostName = null;
var port = null;
var charSet = "utf-8";
var init = function(print, error, quit, argv, keyboard, argParser) {
argv.forEach(argParser);
checkVars();
client = new net.Socket();
client.on("data", print);
client.on("error", error);
client.on("close", quit);
client.connect(port, hostName, function() { });
process.stdin.resume();
process.stdin.setRawMode(true);
process.stdin.setEncoding(charSet);
process.stdin.on("data", keyboard);
};
var print = function(text) {
process.stdout.write(text);
};
var keyboard = function(key) {
if (echo) print(key);
client.write(key);
};
var error = function(e) {
print(e.toString() + "\n");
quit();
};
var quit = function() {
print("\n");
process.exit();
};
var argParser = function(arg) {
if (arg.startsWith("echo")) echo = true;
else if(arg.startsWith("host:")) hostName = arg.split(":")[1];
else if (arg.startsWith("port:")) port = parseInt(arg.split(":")[1]);
else if (arg.startsWith("charSet:")) charSet = arg.split(":")[1];
}
var checkVars = function() {
if (hostName == null ||
port == null) {
print("\nNEVER RUN FOREIGN CODE WITHOUT FIRST READING IT\n");
quit();
}
}
init(print, error, quit, argv, keyboard, argParser);