Module: Fargo::Protocol::PeerDownload

Included in:
Peer
Defined in:
lib/fargo/protocol/peer_download.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#download ⇒ Object

Returns the value of attribute download.



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# File 'lib/fargo/protocol/peer_download.rb', line 5

def download
  @download
end

Instance Method Details

#begin_download! ⇒ Object 



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# File 'lib/fargo/protocol/peer_download.rb', line 90

def begin_download!
  FileUtils.mkdir_p File.dirname(download_path), :mode => 0755
  @file = File.open download_path, 'wb'

  @file.seek @download.offset
  @handshake_step = 5
  @last_published = 0

  if @download.file_list?
    if @client_extensions.include? 'XmlBZList'
      @download.file = 'files.xml.bz2'
    elsif @client_extensions.include? 'BZList'
      @download.file = 'MyList.bz2'
    else
      @download.file = 'MyList.DcLst' # TODO: support this?
    end
  end

  if @client_extensions.include? 'ADCGet'
    download_query = @download.file
    if @download.tth && @client_extensions.include?('TTHF')
      download_query = 'TTH/' + @download.tth
    end

    zlig = @client_extensions.include?('ZLIG') ? ' ZL1' : ''

    send_message 'ADCGET', "file #{download_query} #{@download.offset} #{@download.size}#{zlig}"

  # See http://www.teamfair.info/wiki/index.php?title=XmlBZList for
  # what the $Supports extensions mean for the U?GetZ?Block commands
  elsif @client_extensions.include? 'GetZBlock'
    @getblock_sent = true
    @zlib          = true
    send_message 'UGetZBlock',
      "#{@download.offset} #{@download.size} #{@download.file}"
  elsif @client_extensions.include? 'XmlBZList'
    @getblock_sent = true
    @zlib          = false
    send_message 'UGetBlock',
      "#{@download.offset} #{@download.size} #{@download.file}"

  else
    @get_sent = true
    send_message 'Get', "#{@download.file}$#{@download.offset + 1}"
  end

  Fargo.logger.debug "#{self}: Beginning download of #{@download}"
end

#parse_data? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fargo/protocol/peer_download.rb', line 44

def parse_data?
  @handshake_step != 6
end

#receive_data_chunk(data) ⇒ Object 



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# File 'lib/fargo/protocol/peer_download.rb', line 7

def receive_data_chunk data
  # only download if we're at the correct handshake step
  return super if @handshake_step != 6 || @download.nil?

  if @zlib
    @inflator = Zlib::Inflate.new if @inflator.nil?
    data      = @inflator.inflate data
  end

  @file << data
  @recvd += data.length

  if @recvd > @length
    error "#{self} #{@recvd} > #{@length}!!!"
    download_finished!
  else
    percent = @recvd.to_f / @length
    @download.percent = percent

    if percent - @last_published > 0.05
      @file.flush
      @client.channel << [:download_progress, {:percent => percent,
                                  :file           => download_path,
                                  :nick           => @other_nick,
                                  :download       => @download.to_h,
                                  :size           => @recvd,
                                  :compressed     => @zlib}]

      @last_published = percent
    end

    download_finished! if @recvd == @length
  end

  true
end

#receive_message(type, message) ⇒ Object 



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# File 'lib/fargo/protocol/peer_download.rb', line 48

def receive_message type, message
  case type
    when :file_length, :adcsnd, :sending
      if @handshake_step == 5
        @recvd          = 0
        @handshake_step = 6

        @zlib   = message[:zlib] unless @getblock_sent
        @length = message[:size]

        send_message 'Send' if @get_sent

        if @zlib
          Fargo.logger.debug(
            "Enabling zlib compression on: #{@download.file}")
        end

        @client.channel << [:download_started, {:file => download_path,
                                   :download  => @download.to_h,
                                   :length    => @length,
                                   :nick      => @other_nick}]
      else
        error "Premature disconnect when #{message[:type]} received"
      end

    when :noslots
      if @download
        Fargo.logger.debug "#{self}: No Slots for #{@download}"

        download_failed! 'No Slots'
      end

    when :error
      Fargo.logger.warn @last_error = "#{self}: Error! #{message[:message]}"
      download_failed! message[:message]

    # This wasn't handled by us, proxy it on up to the client
    else
      super
  end
end

#unbind ⇒ Object 



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# File 'lib/fargo/protocol/peer_download.rb', line 139

def unbind
  super

  Fargo.logger.debug "#{self} Disconnected from: #{@other_nick}"

  if @download
    download_failed! @last_error, :recvd => @recvd, :length => @length
  end

  reset_download
end