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# frozen_string_literal: true
# Copyright, 2018, by Samuel G. D. Williams. <http://www.codeotaku.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
require_relative 'readable'
require 'async/io/stream'
module Protocol
module HTTP
module Body
class File < Readable
BLOCK_SIZE = Async::IO::BLOCK_SIZE
MODE = ::File::RDONLY | ::File::BINARY
def self.open(path, *arguments, **options)
self.new(::File.open(path, MODE), *arguments, **options)
end
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
def close(error = nil)
@file.close
@remaining = 0
super
end
attr :file
attr :offset
attr :length
def empty?
@remaining == 0
end
def ready?
true
end
def rewind
@file.seek(@offset)
end
def stream?
false
end
def read
if @remaining > 0
amount = [@remaining, @block_size].min
if chunk = @file.read(amount)
@remaining -= chunk.bytesize
return chunk
end
end
end
def join
return "" if @remaining == 0
buffer = @file.read(@remaining)
@remaining = 0
return buffer
end
def inspect
"\#<#{self.class} file=#{@file.inspect} offset=#{@offset} remaining=#{@remaining}>"
end
end
end
end
end
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