Class: S3sync::ProgressStream

Inherits:
SimpleDelegator
  • Object
show all
Defined in:
lib/s3sync/HTTPStreaming.rb

Instance Method Summary collapse

Constructor Details

#initialize(s, size = 0) ⇒ ProgressStream

Returns a new instance of ProgressStream.



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# File 'lib/s3sync/HTTPStreaming.rb', line 54

def initialize(s, size=0)
	@start = @last = Time.new
	@total = size
	@transferred = 0
	@closed = false
	@printed = false
	@innerStream = s
	super(@innerStream)
	__setobj__(@innerStream)
end

Instance Method Details

#close ⇒ Object 



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# File 'lib/s3sync/HTTPStreaming.rb', line 101

def close()
	$stdout.printf("\n") if @printed and not @closed
	@closed = true
	@innerStream.close
end

#read(i) ⇒ Object

need to catch reads and writes so we can count what’s being transferred



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# File 'lib/s3sync/HTTPStreaming.rb', line 65

def read(i)
	res = @innerStream.read(i)
	@transferred += res.respond_to?(:length) ? res.length : 0
	now = Time.new
	if(now - @last > 1) # don't do this oftener than once per second
		@printed = true
          begin
             $stdout.printf("\rProgress: %db  %db/s  %s       ", @transferred, (@transferred/(now - @start)).floor, 
                @total > 0? (100 * @transferred/@total).floor.to_s + "%" : ""  
             )
          rescue FloatDomainError
             #wtf?
          end
		$stdout.flush
		@last = now
	end
	res
end

#rewind ⇒ Object 



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# File 'lib/s3sync/HTTPStreaming.rb', line 97

def rewind()
	@transferred = 0
	@innerStream.rewind if @innerStream.respond_to?(:rewind)
end

#write(s) ⇒ Object 



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# File 'lib/s3sync/HTTPStreaming.rb', line 83

def write(s)
	@transferred += s.length
	res = @innerStream.write(s)
	now = Time.new
	if(now -@last > 1) # don't do this oftener than once per second
		@printed = true
		$stdout.printf("\rProgress: %db  %db/s  %s       ", @transferred, (@transferred/(now - @start)).floor, 
			@total > 0? (100 * @transferred/@total).floor.to_s + "%" : ""  
		)  
		$stdout.flush
		@last = now
	end
	res
end