Is there an easy-to-use FTP library for Ruby?

问题:

Is there a high-level Ruby library to interact with an FTP server?

Instead of Net::HTTP I can use HTTParty, Curb, Rest Client, or Typhoeus, which makes everything easier, but I can't find any similar solutions to replace/enhance Net::FTP.

More specifically, I'm looking for:

• minimal lines to connect to a server. For example, login must be explicitly specified with Net::FTP
• the ability to iterate through all entries in one folder, or using glob, or just recursively.
• the ability to get all possible information, such as the type of entry, size, mtime without manually parsing returned lines.

回答1:

Ruby's built-in Open-URI will handle FTP.

From Open-URI's docs:

OpenURI is an easy-to-use wrapper for net/http, net/https and net/ftp.

This will seem to hang while it retrieves the Ruby source, but should return after a minute or two.

require 'open-uri'
open('ftp://ftp.ruby-lang.org//pub/ruby/ruby-1.9.2-p136.tar.bz2') do |fi|
  File.open('ruby-1.9.2-p136.tar.bz2', 'wb') do |fo|
    fo.puts fi.read
  end
end

---

Or, Net::FTP is easy to use with a lot more functionality:

require 'net/ftp'

Net::FTP.open('ftp.ruby-lang.org') do |ftp|    
  ftp.login
  ftp.chdir('/pub/ruby')
  puts ftp.list('ruby-1.9.2*')
  puts ftp.nlst()

  ruby_file = 'ruby-1.9.2-p136.tar.bz2'
  ftp.getbinaryfile(ruby_file, ruby_file, 1024)
end

回答2:

Have you tried EventMachine? https://github.com/schleyfox/em-ftp-client