Question

我正在使用promise ftp来获取文件并收到错误“ 未知命令”。启用调试模式将为我提供以下输出。

[connection] > 'USER ecopo108'
[connection] < '331 User userrrrr OK. Password required\r\n'
[parser] < '331 User userrrrr  OK. Password required\r\n'
[parser] Response: code=331, buffer='User userrrrr OK. Password required'
[connection] > 'PASS password'
[connection] < '230 OK. Current restricted directory is /\r\n'
[parser] < '230 OK. Current restricted directory is /\r\n'
[parser] Response: code=230, buffer='OK. Current restricted directory is /'
[connection] > 'FEAT'
[connection] < '211-Extensions supported:\r\n EPRT\r\n IDLE\r\n MDTM\r\n SIZE\r\n MFMT\r\n REST STREAM\r\n MLST type*;size*;sizd*;modify*;UNIX.mode*;UNIX.uid*;UNIX.gid*;unique*;\r\n MLSD\r\n AUTH TLS\r\n PBSZ\r\n PROT\r\n UTF8\r\n TVFS\r\n ESTA\r\n PASV\r\n EPSV\r\n SPSV\r\n ESTP\r\n211 End.\r\n'
[parser] < '211-Extensions supported:\r\n EPRT\r\n IDLE\r\n MDTM\r\n SIZE\r\n MFMT\r\n REST STREAM\r\n MLST type*;size*;sizd*;modify*;UNIX.mode*;UNIX.uid*;UNIX.gid*;unique*;\r\n MLSD\r\n AUTH TLS\r\n PBSZ\r\n PROT\r\n UTF8\r\n TVFS\r\n ESTA\r\n PASV\r\n EPSV\r\n SPSV\r\n ESTP\r\n211 End.\r\n'
[parser] Response: code=211, buffer='Extensions supported:\r\n EPRT\r\n IDLE\r\n MDTM\r\n SIZE\r\n MFMT\r\n REST STREAM\r\n MLST type*;size*;sizd*;modify*;UNIX.mode*;UNIX.uid*;UNIX.gid*;unique*;\r\n MLSD\r\n AUTH TLS\r\n PBSZ\r\n PROT\r\n UTF8\r\n TVFS\r\n ESTA\r\n PASV\r\n EPSV\r\n SPSV\r\n ESTP\r\nEnd.'
[connection] > 'OPTS UTF8 ON'
[connection] < '200 OK, UTF-8 enabled\r\n'
[parser] < '200 OK, UTF-8 enabled\r\n'
[parser] Response: code=200, buffer='OK, UTF-8 enabled'
[connection] > 'TYPE I'
[connection] < '200 TYPE is now 8-bit binary\r\n'
[parser] < '200 TYPE is now 8-bit binary\r\n'
[parser] Response: code=200, buffer='TYPE is now 8-bit binary'
[connection] > 'CWD ./public_html'
[connection] < '250 OK. Current directory is /public_html\r\n'
[parser] < '250 OK. Current directory is /public_html\r\n'
[parser] Response: code=250, buffer='OK. Current directory is /public_html'
[connection] > 'EPSV'
[connection] < '500 Unknown command\r\n'
[parser] < '500 Unknown command\r\n'
[parser] Response: code=500, buffer='Unknown command'
{ Error: Unknown command
    at makeError (C:\Users\Devon\Desktop\logfiles\node_modules\@icetee\ftp\lib\connection.js:1128:13)
    at Parser.<anonymous> (C:\Users\Devon\Desktop\logfiles\node_modules\@icetee\ftp\lib\connection.js:122:25)
    at emitTwo (events.js:126:13)
    at Parser.emit (events.js:214:7)
    at Parser._write (C:\Users\Devon\Desktop\logfiles\node_modules\@icetee\ftp\lib\parser.js:61:10)
    at doWrite (_stream_writable.js:396:12)
    at writeOrBuffer (_stream_writable.js:382:5)
    at Parser.Writable.write (_stream_writable.js:290:11)
    at Socket.ondata (C:\Users\Devon\Desktop\logfiles\node_modules\@icetee\ftp\lib\connection.js:298:20)
    at emitOne (events.js:116:13)
    at Socket.emit (events.js:211:7)
    at addChunk (_stream_readable.js:263:12)
    at readableAddChunk (_stream_readable.js:250:11)
    at Socket.Readable.push (_stream_readable.js:208:10)
    at TCP.onread (net.js:601:20) code: 500 }
[connection] < '500 Logout.\r\n'

以下是我获取robot.txt文件的代码，但是在ftp.getn文件之后它没有进入.then块。我可以使用相同的配置通过FTP客户端（如Filezilla）将其下拉，主机，用户并通过）。在没有ftp.cmd的情况下，我得到了相同的结果，并尝试了多种不同的路径

const PromiseFtp = require("promise-ftp");
const fs = require("fs");

const config = {
  host: "host",
  user: "user",
  password: "pass",
  debug: console.log
};
function testFtp() {
  var ftp = new PromiseFtp();
  ftp
    .connect(config)
    .then(() => {
      return ftp.cwd("./public_html");
    })
    .then(() => {
      return ftp.get("robots.txt");
    })
    .then(function(stream) {
      return new Promise(function(resolve, reject) {
        stream.once("close", resolve);
        stream.once("error", reject);
        stream.pipe(fs.createWriteStream("robots.txt"));
      });
    })
    .then(function() {
      return ftp.end();
    })
    .catch(err => {
      console.log(err);
      ftp.end();
    });
}

testFtp();

使用node.js和promise-ftp 1.3.5

Answer 1

根据服务器对FEAT命令的响应，服务器声称支持EPRT和EPSV扩展：

> FEAT
< 211-Extensions supported:
<  EPRT
<  ...
<  EPSV
<  ...
< 211 End

基于此，FTP客户端正在使用以下命令，但是现在服务器声称不支持该命令，这与之前的声明相反：

> EPSV
< 500 Unknown command

这意味着服务器已损坏，或者中间有一些损坏的（透明的）FTP代理，该代理不支持EPSV，但无法从服务器对FEAT命令的原始响应中删除要求的支持。

无论如何-这不是FTP客户端的故障。问题不在于您的代码，而在于服务器端。

基于Promise-ftp在node-ftp forcePasv中使用的must be a way to set an option代码，即使服务器声称支持{{ 1}}。我对所有代码都不是很熟悉，但是我建议您尝试这样的操作：

PASV

带有ftp.get的promise-ftp未知命令

1 个答案: