Question

有人知道在下载文件时从ruby的Net :: FTP库获取状态更新的方法吗？我正在尝试实现一个Web界面，显示从远程ftp服务器下载文件时剩余百分比的进度条。

Answer 1

为了将来的参考 - 我偶然发现了一个解决方案：

filesize = ftp.size(filename)
transferred = 0
p "Beginning download, file size: #{filesize}"
ftp.getbinaryfile(filename, "#{SOURCE_IMPORT_DIRECTORY}/#{filename}", 1024) { |data|
  transferred += data.size
  percent_finished = ((transferred).to_f/filesize.to_f)*100
  p "#{percent_finished.round}% complete"
}
ftp.close

Answer 2

我建立在@ smnirven的优秀方法上，通过100点进展来减少噪音：

filesize = ftp.size(filename)
transferred = 0
notified = false

ftp.getbinaryfile(filename, full_local_path, 1024) do |data|
  transferred += data.size
  percent_finished = (((transferred).to_f/filesize.to_f)*100)
  if percent_finished.to_s.include?('.0')
    print "."  if notified == false
    notified = true
  else
    notified = false
  end
end
ftp.close

输出：

[progress] Downloading CBSA boundaries...
..........................................................................
..........................
[progress] Finished!

Answer 3

只需对代码进行少量更新即可使输出更清晰。

filesize = ftp.size(FILENAME)
transferred = 0
percent_finished = -9999

ftp.gettextfile(FILENAME, File.basename(FILENAME)) { |data|
  transferred += data.size

  temp = (((transferred).to_f/filesize.to_f)*100).round

  if percent_finished < temp
    percent_finished = temp
    STDOUT.write "\r Download progress: #{percent_finished.round}% completed"
  end
}
ftp.close

Ruby Net :: FTP进度条

3 个答案: