FTP 使用 Node.js 提交的命令未处理套接字代码

Question

我有以下 FTP 使用 telnet 的会话：

$ telnet ftp.fsn.hu 21
Trying 195.228.252.133...
Connected to ftp.fsn.hu.
Escape character is '^]'.
220 ftp.fsn.hu FTP server (Version 6.00LS) ready.
USER anonymous
331 Guest login ok, send your email address as password.
PASS joe@example.com
230 Guest login ok, access restrictions apply.

我试图将其自动化：

var net = require('net');

var sock = net.Socket();

var regex220 = /^220/;

var regex331 = /^331/;

var regex230 = /^230/;

sock.on('data', function (buffer)
  { console.log('data received:\n' + buffer);

    if (buffer.toString().match(regex220) !== null)
    {
      sock.write('USER anonymous');
      console.log("sent: 'USER anonymous'");
    } else if (buffer.toString().match(regex331) !== null)
    {
      sock.write('PASS joe@example.com');
      console.log("sent: 'PASS joe@example.com'");
    } else if (buffer.toString().match(regex230) !== null)
    {
      console.log('LOGGED IN');
    }
  });

sock.connect(21, 'ftp.fsn.hu');

运行这在 Fedora 32 和 Node.js 12.16.1 我得到

$ node fsn.js
data received:
220 ftp.fsn.hu FTP server (Version 6.00LS) ready.

sent: 'USER anonymous'

它挂在那里。

为什么这个节目没有通过第二轮和第三轮？

Answer 1

您必须使用 CRLF 终止（提交）命令：

sock.write('USER anonymous\r\n');

FTP 使用 Node.js 提交的命令未处理套接字代码

FTP command submitted with Node.js Socket code is not processed

sockets

ftp

events

node.js