Class: RubyTorrent::Package

Inherits:
Object show all
Includes:
EventSource
Defined in:
lib/rubytorrent/package.rb

Overview

finally, the Package. one Package per Controller so we don’t do any thread safety stuff in here.

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from EventSource

append_features, #on_event, #relay_event, #send_event, #unregister_events

Constructor Details

#initialize(metainfo, out = nil, validity_assumption = nil) ⇒ Package

Returns a new instance of Package.



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# File 'lib/rubytorrent/package.rb', line 487

def initialize(metainfo, out=nil, validity_assumption=nil)
  info = metainfo.info

  created = false
  out ||= info.name
  case out
  when File
    raise ArgumentError, "'out' cannot be a File for a multi-file .torrent" if info.multiple?
    fstream = out
  when Dir
    raise ArgumentError, "'out' cannot be a Dir for a single-file .torrent" if info.single?
    fstream = out
  when String
    if info.single?
      rt_debug "output file is #{out}"
      begin
        fstream = File.open(out, "rb+")
      rescue Errno::ENOENT
 created = true
        fstream = File.open(out, "wb+")
      end
    else
      rt_debug "output directory is #{out}"
      unless File.exists? out
        Dir.mkdir(out)
        created = true
      end
      fstream = Dir.open(out)
    end
  else
    raise ArgumentError, "'out' should be a File, Dir or String object, is #{out.class}"
  end

  @ro = false
  @size = info.total_length
  if info.single?
    @files = [[fstream, Mutex.new, info.length]]
  else
    @files = info.files.map do |finfo|
      path = File.join(finfo.path[0, finfo.path.length - 1].inject(fstream.path) do |path, el|
        dir = File.join(path, el)
        unless File.exist? dir
          rt_debug "making directory #{dir}"
          Dir.mkdir dir
        end
        dir
      end, finfo.path[finfo.path.length - 1])
      rt_debug "opening #{path}..."
      [open_file(path), Mutex.new, finfo.length]
    end
  end

  i = 0
  @pieces = info.pieces.unpack("a20" * (info.pieces.length / 20)).map do |hash|
    start = (info.piece_length * i)
    len = [info.piece_length, @size - start].min
    p = Piece.new(i, hash, start, len, @files, (created ? false : validity_assumption))
    p.on_event(self, :complete) { send_event(:complete) if complete? }
    yield p if block_given?
    (i += 1) && p
  end

  reopen_ro if complete?
end

Instance Attribute Details

#pieces ⇒ Object (readonly)

Returns the value of attribute pieces.



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# File 'lib/rubytorrent/package.rb', line 484

def pieces
  @pieces
end

#size ⇒ Object (readonly)

Returns the value of attribute size.



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# File 'lib/rubytorrent/package.rb', line 484

def size
  @size
end

Instance Method Details

#bytes_completed ⇒ Object 



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# File 'lib/rubytorrent/package.rb', line 571

def bytes_completed
  @pieces.inject(0) { |s, p| s + (p.complete? ? p.length : 0) }
end

#complete? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rubytorrent/package.rb', line 569

def complete?; @pieces.detect { |p| !p.complete? || !p.valid? } == nil; end

#num_pieces ⇒ Object 



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# File 'lib/rubytorrent/package.rb', line 583

def num_pieces; @pieces.length; end

#percent_completed ⇒ Object 



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# File 'lib/rubytorrent/package.rb', line 579

def percent_completed
  100.0 * pieces_completed.to_f / @pieces.length.to_f
end

#pieces_completed ⇒ Object 



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# File 'lib/rubytorrent/package.rb', line 575

def pieces_completed
  @pieces.inject(0) { |s, p| s + (p.complete? ? 1 : 0) }
end

#reopen_ro ⇒ Object 



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# File 'lib/rubytorrent/package.rb', line 553

def reopen_ro
  raise "called on incomplete package" unless complete?
  return if @ro
  
  rt_debug "reopening all files with mode r"
  begin
  @files = @files.map do |fp, mutex, size|
    [fp.reopen(fp.path, "rb"), mutex, size]
  end
  rescue   SystemCallError, StandardError
          $stderr.print "system call error: " + $!
  end # exception rescue

  @ro = true
end

#ro? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rubytorrent/package.rb', line 552

def ro?; @ro; end

#to_s ⇒ Object 



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# File 'lib/rubytorrent/package.rb', line 585

def to_s
  "<#{self.class} size #@size>"
end