Ruby Net :: FTP gettextfile无法在本地保存文件

Question

I am trying to retrieve files (.csv) from an ftp site and save them all locally in the same folder. My code looks like this:

#! /usr/bin/ruby

require 'logger'
require 'fileutils'
require 'net/ftp'
require 'rubygems'
require 'mysql2'
require 'roo'
require 'date'

# logging setup
log = Logger.new("/path_to_logs/ftp_log.log", 10, 1024000)
log.level = Logger::INFO

export_ftp_path = '/Receive/results/'
export_work_path ='/Users/pierce/results_exports/'

Net::FTP.open('host', 'username', 'password') do |ftp|
    log.info("Logged into FTP")
    ftp.passive = true
    ftp.chdir("#{export_ftp_path}")
      ftp.list.each do |file|
        log.info("Found file #{file}")
        new_file = file[56..115]  #take part of the file name and remove spaces and periods
        new_file = new_file.gsub(/[.]+/, "") 
        new_file = new_file.gsub(/\s/, "0") 
        ftp.gettextfile(file,"#{new_file}")
        log.info("Downloaded file #{new_file}")
      end
end

And here is the error I receive:

/Users/pierce/.rbenv/versions/1.9.2-p290/lib/ruby/1.9.1/net/ftp.rb:560:in `initialize': No such file or directory -  (Errno::ENOENT)
    from /Users/pierce/.rbenv/versions/1.9.2-p290/lib/ruby/1.9.1/net/ftp.rb:560:in `open'
    from /Users/pierce/.rbenv/versions/1.9.2-p290/lib/ruby/1.9.1/net/ftp.rb:560:in `gettextfile'
    from ftp_test.rb:44:in `block (2 levels) in <main>'
    from ftp_test.rb:33:in `each'
    from ftp_test.rb:33:in `block in <main>'
    from /Users/pierce/.rbenv/versions/1.9.2-p290/lib/ruby/1.9.1/net/ftp.rb:116:in `open'

As suggested, here are the values I have for puts file and puts new_file.

file = -rwxr-xr-x    1 1130419  114727       9546 May 17 08:11 results_Wed. 16 May 2012.csv
new_file = results_Wed0230May02012csv

Any suggestions on what to change in gettextfile or within my script to get the files saved correctly?

Answer 1

You should use nlst instead of list when you just need a list of files in a directory. The output of list needs to be properly parsed otherwise.

When you request the file it has to be the original filename, including all spaces. When you save the file it can be anything you want (including spaces or not). The error was because you were requesting the wrong file. Use nlst in your case instead. It will make it much easier (no conversion or parsing needed).