Class: Srt::Downloader

Inherits:
Object
  • Object
show all
Includes:
HTTParty
Defined in:
lib/srt-downloader.rb

Instance Method Summary collapse

Constructor Details

#initialize(filename) ⇒ Downloader

Returns a new instance of Downloader.



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# File 'lib/srt-downloader.rb', line 10

def initialize(filename)
  @filename = filename
  @res
end

Instance Method Details

#download ⇒ Object 



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# File 'lib/srt-downloader.rb', line 15

def download
  get_result
  write_file
end

#get_result ⇒ Object 



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# File 'lib/srt-downloader.rb', line 20

def get_result
  @post_response = post
  latest_result = @post_response[-1] # latest one
  latest_result_link = latest_result["Files"][0]["Link"]

  @get_response = HTTParty.get(latest_result_link)

  # http://stackoverflow.com/questions/13393725/ruby-how-to-get-the-name-of-a-file-with-open-uri
  @download_file_name = @get_response.headers["content-disposition"].match(/filename=(\"?)(.+)\1/)[2]
end

#post ⇒ Object 



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# File 'lib/srt-downloader.rb', line 38

def post
  options = { :body => {'filehash' => vhash , 'pathinfo' => @filename , 'format' => 'json', 'lang' => 'Chn'}  }
  @results = self.class.post('/api/subapi.php', options)
end

#vhash ⇒ Object 



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# File 'lib/srt-downloader.rb', line 43

def vhash
  file_size = File.size?(@filename)
  offset = []

  offset[0] = 4096
  offset[1] = file_size / 3 * 2
  offset[2] = file_size / 3
  offset[3] = file_size - 8192

  arr = []
  
  offset.each do |position|
    
    vblock = IO.binread(@filename, 4096, position)  # length , offset
    md5 = Digest::MD5.hexdigest(vblock)
    arr << md5
  end


  hash = arr.join(";")

  return hash
end

#write_file ⇒ Object 



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# File 'lib/srt-downloader.rb', line 31

def write_file
  File.open(@download_file_name, "wb") do |f| 
    f.write @get_response.parsed_response
    puts "Download : #{@download_file_name} complete!"
  end
end