Class: FileFM::StreamingUploader::MultipartStream

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

Instance Method Summary collapse

Constructor Details

#initialize(parts, blk = nil) ⇒ MultipartStream

Returns a new instance of MultipartStream.



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# File 'lib/filefm/streaming_uploader.rb', line 145

def initialize(parts, blk = nil)
  @callback = nil
  if blk
    @callback = blk
  end
  @parts = parts
  @part_no = 0
  @part_offset = 0
end

Instance Method Details

#read(how_much) ⇒ Object 



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# File 'lib/filefm/streaming_uploader.rb', line 159

def read(how_much)
  @callback.call(how_much) if @callback
  return nil if @part_no >= @parts.size

  how_much_current_part = @parts[@part_no].size - @part_offset
  
  how_much_current_part = if how_much_current_part > how_much
                            how_much
                          else
                            how_much_current_part
                          end
  
  how_much_next_part = how_much - how_much_current_part

  current_part = @parts[@part_no].read(@part_offset, how_much_current_part)
  
  # recurse into the next part if the current one was not large enough
  if how_much_next_part > 0
    @part_no += 1
    @part_offset = 0
    next_part = read(how_much_next_part)
    current_part + if next_part
                     next_part
                   else
                     ''
                   end
  else
    @part_offset += how_much_current_part
    current_part
  end
end

#size ⇒ Object 



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# File 'lib/filefm/streaming_uploader.rb', line 155

def size
  @parts.inject(0) {|size, part| size + part.size}
end