下载之前获取文件大小&计算已经下载了多少（http + ruby​​） [英] Get file size before downloading & counting how much already downloaded (http+ruby)

问题描述

• 在之前获取文件大小，我开始下载


• 显示已经下载了多少％

。
$ b

  require'net / http'
 require'uri'
 
 url =http：//www.onalllevels .com / 2009-12-02TheYangShow_Squidoo_Part 1.flv
 
 url_base = url.split（'/'）[2] 
 url_path ='/'+url.split('/' ）[3 ..- 1] .join（'/'）
 
 Net :: HTTP.start（url_base）do | http | 
 resp = http.get（URI.escape（url_path））
打开（test.file，wb）do | file | 
 file.write（resp.body）
 end 
 end 
 putsDone。 
  

解决方案

所以我甚至使用进度条使它工作。 ...

  require'net / http'
 require'uri'
 require'progressbar'
 
 url =url with some file
 
 
 url_base = url.split（'/'）[2] 
 url_path ='/'+ url.split（'/'）[3 ..- 1] .join（'/'）
 @counter = 0 
 
 Net :: HTTP.start（url_base）do | http | 
 response = http.request_head（URI.escape（url_path））
 ProgressBar＃format_arguments = [：title，：percentage，：bar，：stat_for_file_transfer] 
 pbar = ProgressBar.new（file名称：，response ['content-length']。to_i）
 File.open（test.file，'w'）{| f | 
 http.get（URI.escape（url_path））do | str | 
 f.write str 
 @counter + = str.length 
 pbar.set（@counter）
 end 
} 
 end 
 pbar .finish 
放完成。 
  

Can anybody help me to

• get the file size before I start downloading
• display how much % was already downloaded

.

require 'net/http'
require 'uri'

url = "http://www.onalllevels.com/2009-12-02TheYangShow_Squidoo_Part 1.flv"

url_base = url.split('/')[2]
url_path = '/'+url.split('/')[3..-1].join('/')

Net::HTTP.start(url_base) do |http|
  resp = http.get(URI.escape(url_path))
  open("test.file", "wb") do |file|
    file.write(resp.body)
  end
end
puts "Done."

解决方案

so I made it work even with the progress bar ....

require 'net/http'
require 'uri'
require 'progressbar'

url = "url with some file"


url_base = url.split('/')[2]
url_path = '/'+url.split('/')[3..-1].join('/')
@counter = 0

Net::HTTP.start(url_base) do |http|
  response = http.request_head(URI.escape(url_path))
  ProgressBar#format_arguments=[:title, :percentage, :bar, :stat_for_file_transfer]
  pbar = ProgressBar.new("file name:", response['content-length'].to_i)
  File.open("test.file", 'w') {|f|
    http.get(URI.escape(url_path)) do |str|
      f.write str
  @counter += str.length 
  pbar.set(@counter)
    end
   }
end
pbar.finish
puts "Done."

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