FTPS (TLS/SSL) from Ruby on Rails App - ruby-on-rails

Question

I have an FTP server which only accepts connections through running FTPS (explicit FTP over TLS). I need to be able to connect to this using a Ruby on Rails app.
Does anybody know of a method to do this? I have tried the Net::FTP library but this does not appear to support FTPS connections.

Answer 1

How about using Net::FTPTLS ?

Answer 2

Since Ruby 2.4, TLS over FTP has been available with Net::FTP... this has caused gems like double-bag-ftps to become archived and all your google searches to yield outdated answers.
If you can do explicit FTP over TLS (Connects to FTP normally, then issues a command AUTH TLS to switch to TLS Mode), then great... that should be able to use Ruby's Net::FTP out of the box by just passing {ssl: true} in the options.
Implicit FTP over TLS (runs over TLS from the get-go) does not work out of the box, however, and you must override Net::FTP's connection method to establish an SSL socket and then optionally send commands to the FTP server.
Inidka K posted a Github Gist, but since those are bad form (can go stale), I've posted my version that works against a ShareFile Implicit FTP setup (which seems to only support Implicit FTP):
require 'net/ftp'
class ImplicitFtp < Net::FTP
FTP_PORT = 990
def connect(host, port = FTP_PORT)
synchronize do
#host = host
#bare_sock = open_socket(host, port)
begin
ssl_sock = start_tls_session(Socket.tcp(host, port))
#sock = BufferedSSLSocket.new(ssl_sock, read_timeout: #read_timeout)
voidresp
if #private_data_connection
voidcmd("PBSZ 0")
voidcmd("PROT P")
end
rescue OpenSSL::SSL::SSLError, Net::OpenTimeout
#sock.close
raise
end
end
end
end
Then, in your code:
ftp_options = {
port: 990,
ssl: true,
debug_mode: true, # If you want to see what's going on
username: FTP_USER,
password: FTP_PASS
}
ftp = ImplicitFtp.open(FTP_HOST, ftp_options)
puts ftp.list
ftp.close

Answer 3

I done something like this with Implicit/Explicit FTPS, I used double-bag-ftps gem that I patched to support reuse of ssl session. It's a requirement for a lot of ftps servers.
I put the code on github here : https://github.com/alain75007/double-bag-ftps

Answer 4

EDIT: I figured out how to get it running locally, but am having issues getting it to work on Heroku. That's a bit of a departure from this question, so I've created a new one:
Heroku with FTPTLS - Error on SSL Connection
require 'net/ftptls'
ftp = Net::FTPTLS.new()
ftp.passive = true
#make sure you define port_number
ftp.connect('host.com', port_number)
ftp.login('Username', 'Password')
ftp.gettextfile('filename.ext', 'where/to/save/file.ext')
ftp.close

Answer 5

If you want to use Implicit FTPS, please try this gist.
For Explicit FTPs, you can use the ruby gem ftpfxp.

Answer 6

Support for implicit FTPS was merged into ruby/net-ftp in January 2022 (in this PR). If you want to make use of this straight away, you can include the latest version directly in your Gemfile:
gem "net-ftp", github: "ruby/net-ftp", branch: "master"
Then you just need:
options = {
ssl: true,
port: 990,
implicit_ftps: true,
username: "your-user",
password: "*********",
debug_mode: true
}
Net::FTP.open("yourhost.com", options) do |ftp|
ftp.list.map{ |f| puts f }
end

Answer 7

I implemented an ftps solution using double-bag-ftps
double-bag-ftps