From: castillo.bryan@...
Date: 2007-03-21T14:55:06+09:00
Subject: Re: FTPS - How to connect with Ruby?

On Mar 20, 10:40 am, "ChrisKaelin" <c...@stonedragon.ch> wrote:
> On 20 Mrz., 17:42, "Jan Vesel�" <janvesely....@gmail.com> wrote:
>
>
>
> > Hello, I'm new to Ruby and have the first problem I can't solve myself
> > after a lot of googling - connecting to a FTPS server (FTP AUTH TLS/
> > SSL).
>
> > - there's some library called chilkat, but it's not free (for this
> > little script it's really too expensive to solve it that way)
> > - ftpfxp library is targeted on fxp transfers, but it connects ok -
> > but it doesn't seem like a good library for normal ftp-related work
> > - the standard ftp library doesn't look like it has some support for
> > firewall/proxy to get there a program like TLSWrap between client and
> > server and solve the problem
> > - I found some curl library in prealfa state that could possibly help
> > me somehow - but it looks like the last solution when everything else
> > fails (prealfa, weird installation)
>
> > Could you please give me a hint?
>
> Try net/sftp Module. With that I made a backup script on window$ using
> scp and/or sftp, because rsync is not available on the server, I have
> to back up.
>
> net/sftp project:http://raa.ruby-lang.org/project/net-sftp/
>

Unfortunately, sftp is a different protocol than FTPS and that module
probably won't help.

(3 months ago I received a spec saying my company would communicate
with another company using SFTP, only to figure out after code had
been written that they meant FTPS.)

I looked in my install of ruby and found a file net/ftptls.rb.  That
code looks like it's only for Implicit FTPS, not explicit. I'd try it
anyway.

The code I ended up writing (in Java) was a class that interfaced to
the curl command line client.  It worked very well.  As dirty as it
seemed at the time, I still think it was better than writing JNI to
the curl C interface.

Here is a quick and dirty class to interface to the curl command line
client from ruby.  This should work for FTPS, if your curl client was
compiled with it. curl -V will list the protocols it supports.

class CurlFtp

  CURL = "curl"

  def initialize(url, user, pass, verbose=false)
    @url = url
    @user = user
    @pass = pass
    @verboseFlag = (verbose) ? '-v' : ''
  end

  def put(path, &block)
    command = sprintf "'%s' %s --upload-file - --user '%s:%s' '%s/
%s'",
      CURL, @verboseFlag, @user, @pass, @url, path
     IO.popen(command, "w", &block)
     raise "Curl error: #{$?.to_i / 256}" if $? != 0
  end

  def get(path, &block)
    command = sprintf "'%s' %s --user '%s:%s' '%s/%s'",
      CURL, @verboseFlag, @user, @pass, @url, CGI.escape(path)
    IO.popen(command, "r", &block)
    raise "Curl error: #{$?.to_i / 256}" if $? != 0
  end

end

ftp = CurlFtp.new('ftp://localhost:21', 'bcastill', 'pass', false)

ftp.put('/upload/file.txt') do |io|
  io.puts("Writing to FTP server....")
end

puts "Getting data:"
ftp.get('/upload/file.txt') do |io|
  io.each_line do |line|
    puts "LINE: #{line}"
  end
end