Class: DownloadRequest

Inherits:
Object
  • Object
show all
Defined in:
lib/download_request.rb

Overview

Downloads a file to a specified folder.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(url, download_folder) ⇒ DownloadRequest

Returns a new instance of DownloadRequest.



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# File 'lib/download_request.rb', line 17

def initialize(url, download_folder)
  @url = URI.parse(url)
  # puts @url.path
  @http = Net::HTTP.new(@url.host, @url.port)
  if @url.scheme == "https"
    @http.use_ssl = true
    @http.verify_mode = OpenSSL::SSL::VERIFY_NONE
  end
  @download_folder = download_folder
  @file_size = 0
end

Instance Attribute Details

#error ⇒ Object (readonly)

Returns the value of attribute error.



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# File 'lib/download_request.rb', line 15

def error
  @error
end

#file_size ⇒ Object (readonly)

Returns the value of attribute file_size.



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# File 'lib/download_request.rb', line 15

def file_size
  @file_size
end

#url ⇒ Object (readonly)

Returns the value of attribute url.



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# File 'lib/download_request.rb', line 15

def url
  @url
end

Class Method Details

.get(*args) ⇒ Object 



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# File 'lib/download_request.rb', line 10

def get(*args)
  new(*args).get
end

Instance Method Details

#get ⇒ Object

Writes file segments to disk immediately instead of storing in memory



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# File 'lib/download_request.rb', line 30

def get
  return unless @error.nil?

  dirname = File.dirname(@download_folder)
  unless File.directory?(dirname)
    FileUtils.mkdir_p(dirname)
  end

  local_file = ::File.open(@download_folder, "wb")
  partial = true
  @http.request_get(@url) do |response|
    case response.code
    when "200"
      response.read_body do |segment|
        local_file.write(segment)
      end
      @file_size = ::File.size(@download_folder)
      partial = false
    when "302"
      @error = "Token Not Authorized to Access Specified File"
    else
      @error = "#{response.code} #{response.class.name}"
    end
  end
rescue => e # Net::ReadTimeout, SocketError
  @error = "(#{e.class}) #{e.message}"
ensure
  local_file.close if local_file
  ::File.delete(@download_folder) if partial && ::File.exist?(@download_folder)
end