Node.js上的FTP服务器和Basic-FTP客户端出现问题

Question

我正在尝试使用nwjs来建立客户端和服务器的FTP，并使用ftpd作为服务器，并使用basic-ftp作为客户端来建立彼此的连接。问题是：建立服务器后（使用ftpd提供的test.js示例），我无法使用basic-ftp进行连接（我正确配置了主机，用户，密码和端口，并在另一软件上进行了测试，并且可以正常工作）。

每次尝试时，node都会返回以下内容：

{"code":502,"message":"502 Command not implemented"}

客户代码：

const ftp = require("basic-ftp")
const fs = require("fs")

example()

async function example() {
    const client = new ftp.Client()
    try {
        await client.access({
            host: '192.168.0.7',
            port: 7002,
            user: "oi",
            password: "oi",
            secure: true
        })
        console.log(await client.list())

    }
    catch(err) {
        console.log(err)
    }
    client.close()
}

服务器代码：

var ftpd = require('./example/ftpserver/ftpd.js');
var fs = require('fs');
var path = require('path');
var keyFile;
var certFile;
var server;
var options = {
  host: process.env.IP || '127.0.0.1',
  port: process.env.PORT || 7002,
  tls: null,
};

if (process.env.KEY_FILE && process.env.CERT_FILE) {
  console.log('Running as FTPS server');
  if (process.env.KEY_FILE.charAt(0) !== '/') {
    keyFile = path.join(__dirname, process.env.KEY_FILE);
  }
  if (process.env.CERT_FILE.charAt(0) !== '/') {
    certFile = path.join(__dirname, process.env.CERT_FILE);
  }
  options.tls = {
    key: fs.readFileSync(keyFile),
    cert: fs.readFileSync(certFile),
    ca: !process.env.CA_FILES ? null : process.env.CA_FILES
      .split(':')
      .map(function(f) {
        return fs.readFileSync(f);
      }),
  };
} else {

  console.log('*** To run as FTPS server,                 ***');
  console.log('***  set "KEY_FILE", "CERT_FILE"           ***');
  console.log('***  and (optionally) "CA_FILES" env vars. ***');

}

server = new ftpd.FtpServer(options.host, {
  getInitialCwd: function() {
    return '/';
  },
  getRoot: function() {
    return process.cwd();
  },
  pasvPortRangeStart: 1025,
  pasvPortRangeEnd: 1050,
  tlsOptions: options.tls,
  allowUnauthorizedTls: true,
  useWriteFile: false,
  useReadFile: false,
  uploadMaxSlurpSize: 7000, // N/A unless 'useWriteFile' is true.
});

server.on('error', function(error) {
  console.log('FTP Server error:', error);
});

server.on('client:connected', function(connection) {
  var username = 'oi';
  console.log('client connected: ' + connection.remoteAddress);
  connection.on('command:user', function(user, success, failure) {
    if (user) {
      username = user;
      success();
    } else {
      failure();
    }
  });

  connection.on('command:pass', function(pass, success, failure) {
    if (pass) {
      success(username);
    } else {
      failure();
    }
  });
});

server.debugging = 4;
server.listen(options.port);
console.log('Listening on port ' + options.port);