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嘿，我是 Ruby 新手，并试图通过将一些 progs 从一种语言移植到另一种语言来学习。现在我正在 Ruby 中开发一个 FTP 模糊器，它反映了这个 perl 脚本：

use Net::FTP;
$target = "192.168.37.128";
$buffer = "A\x20";
$buffer .= "A" x 512;
$ftp = Net::FTP->new($target, Debug => 0, Timeout => 5)
      or die "Cannot connect to $host: $@ \n";
$ftp->login("anonymous",'anonymous@nowhere.com')
      or die "Couldn't log in: $@\n";
$ftp->list($buffer);
$ftp->quit;

这是我的 Ruby 等价物：

require 'net/ftp'
buffer = 'A\x20'
buffer = (buffer + ('A'*512))
ftp = Net::FTP.open('127.0.0.1','anonymous','anonymous')
ftp.login
ftp.list(buffer)
ftp.quit

当我运行程序时，我收到以下错误：

C:/Ruby192/lib/ruby/1.9.1/net/ftp.rb:241:in `readline': end of file reached (EOF
Error)
        from C:/Ruby192/lib/ruby/1.9.1/net/ftp.rb:241:in `getline'
        from C:/Ruby192/lib/ruby/1.9.1/net/ftp.rb:251:in `getmultiline'
        from C:/Ruby192/lib/ruby/1.9.1/net/ftp.rb:265:in `getresp'
        from C:/Ruby192/lib/ruby/1.9.1/net/ftp.rb:281:in `voidresp'
        from C:/Ruby192/lib/ruby/1.9.1/net/ftp.rb:304:in `block in voidcmd'
        from C:/Ruby192/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
        from C:/Ruby192/lib/ruby/1.9.1/net/ftp.rb:302:in `voidcmd'
        from C:/Ruby192/lib/ruby/1.9.1/net/ftp.rb:155:in `send_type_command'
        from C:/Ruby192/lib/ruby/1.9.1/net/ftp.rb:149:in `binary='
        from C:/Ruby192/lib/ruby/1.9.1/net/ftp.rb:168:in `ensure in with_binary'

        from C:/Ruby192/lib/ruby/1.9.1/net/ftp.rb:168:in `with_binary'
        from C:/Ruby192/lib/ruby/1.9.1/net/ftp.rb:440:in `block in retrlines'
        from C:/Ruby192/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
        from C:/Ruby192/lib/ruby/1.9.1/net/ftp.rb:439:in `retrlines'
        from C:/Ruby192/lib/ruby/1.9.1/net/ftp.rb:682:in `list'
        from ftpcrash.rb:10:in `<main>'

我已经将问题追溯到该ftp.list(buffer)行，但无法提出一个 Ruby 解决方案来完成$ftp->list($buffer)perl 中的功能。

建议？

4

3 回答 3

1

缓冲区是不必要的。#list 接受一个像'*n'这样的可选参数，而不是缓冲区，它返回一个数组。

require 'net/ftp'
ftp = Net::FTP.open('ftp.gnu.org','anonymous','')
puts ftp.list
ftp.quit
于 2011-04-05T19:14:43.777 回答
0

在这里你想要什么伙计

#!/bin/ruby 

require 'socket'


buffer = "A" * 512

host = 'xx.xx.xx.xx'
port = 21
s = TCPSocket.open(host, port)
s.recv(1024)
s.send("USER anonymous\r\n", 0)
s.recv(1024)
s.send("PASS anonymous\r\n", 0)
s.recv(1024)
s.send(buffer + "\r\n", 0)
sleep 0.3
s.close

保持安全；）

于 2012-03-23T00:14:05.313 回答
0

从net/ftp.rb源代码来看，当 ftp 库试图从服务器获取响应并且响应为空时，会引发此异常。

您应该将此命令包装在begin/rescue/end（或只是rescue）中并相应地处理错误。

于 2011-04-05T18:54:09.467 回答