Class: Protocol::HTTP::Body::File

Inherits:
Readable
  • Object
show all
Defined in:
lib/protocol/http/body/file.rb

Constant Summary collapse

BLOCK_SIZE = 
Async::IO::BLOCK_SIZE
MODE = 
::File::RDONLY | ::File::BINARY

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Readable

#call, #each, #finish

Constructor Details

#initialize(file, range = nil, size: file.size, block_size: BLOCK_SIZE) ⇒ File

Returns a new instance of File.



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# File 'lib/protocol/http/body/file.rb', line 35

def initialize(file, range = nil, size: file.size, block_size: BLOCK_SIZE)
	@file = file
	
	@block_size = block_size
	
	if range
		@file.seek(range.min)
		@offset = range.min
		@length = @remaining = range.size
	else
		@offset = 0
		@length = @remaining = size
	end
end

Instance Attribute Details

#file ⇒ Object (readonly)

Returns the value of attribute file.



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# File 'lib/protocol/http/body/file.rb', line 57

def file
  @file
end

#length ⇒ Object (readonly)

Returns the value of attribute length.



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# File 'lib/protocol/http/body/file.rb', line 60

def length
  @length
end

#offset ⇒ Object (readonly)

Returns the value of attribute offset.



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# File 'lib/protocol/http/body/file.rb', line 59

def offset
  @offset
end

Class Method Details

.open(path, *args) ⇒ Object 



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# File 'lib/protocol/http/body/file.rb', line 31

def self.open(path, *args)
	self.new(::File.open(path, MODE), *args)
end

Instance Method Details

#close(error = nil) ⇒ Object 



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# File 'lib/protocol/http/body/file.rb', line 50

def close(error = nil)
	@file.close
	@remaining = 0
	
	super
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/protocol/http/body/file.rb', line 62

def empty?
	@remaining == 0
end

#inspect ⇒ Object 



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# File 'lib/protocol/http/body/file.rb', line 92

def inspect
	"\#<#{self.class} file=#{@file.inspect} offset=#{@offset} remaining=#{@remaining}>"
end

#join ⇒ Object 



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# File 'lib/protocol/http/body/file.rb', line 82

def join
	return "" if @remaining == 0
	
	buffer = @file.read(@remaining)
	
	@remaining = 0
	
	return buffer
end

#read ⇒ Object 



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# File 'lib/protocol/http/body/file.rb', line 70

def read
	if @remaining > 0
		amount = [@remaining, @block_size].min
		
		if chunk = @file.read(amount)
			@remaining -= chunk.bytesize
			
			return chunk
		end
	end
end

#rewind ⇒ Object 



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# File 'lib/protocol/http/body/file.rb', line 66

def rewind
	@file.seek(@offset)
end