我有一个简洁的小nodejs脚本以文本模式登录原始套接字（主要是telnet）。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);
等价物;因为重新定位的文本只是打印在现有文本上，留下一堆乱七八糟的新旧输出。如何使用以下程序接受和处理telnet字符序列以清除输出？
df = pandas.DataFrame([[2,1],[2,2],[2,3],[2,4],[4,1],[4,2]],columns=
["source_column","desired_output"])#, index = ["1","2","3","4","5","5"])
df
source_column desired_output
0 2 1
1 2 2
2 2 3
3 2 4
4 4 1
5 4 2
答案 0 :(得分：1)
如果远程主机正在移动光标，则可能使用ANSI转义码进行操作。如果是这样，Esc[2J是透明屏幕转义码。