Sha256: c6355fe77ff41a8542404d859e9f3f65335394ebf124823b8c3647220686429b
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Versions: 39
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Contents
module Aws module S3 # A utility class that provides an IO-like interface to a portion of # a file on disk. # @api private class FilePart # @option options [required,String,Pathname,File,Tempfile] :source # @option options [required,Integer] :offset The file part will read # starting at this byte offset. # @option options [required,Integer] :size The maximum number of bytes to # read from the `:offset`. def initialize(options = {}) @source = options[:source] @first_byte = options[:offset] @last_byte = @first_byte + options[:size] @size = options[:size] @file = nil end # @return [String,Pathname,File,Tempfile] attr_reader :source # @return [Integer] attr_reader :first_byte # @return [Integer] attr_reader :last_byte # @return [Integer] attr_reader :size def read(bytes = nil, output_buffer = nil) open_file unless @file read_from_file(bytes, output_buffer) end def rewind if @file @file.seek(@first_byte) @position = @first_byte end 0 end def close @file.close if @file end private def open_file @file = File.open(@source, 'rb') rewind end def read_from_file(bytes, output_buffer) length = [remaining_bytes, *bytes].min data = @file.read(length, output_buffer) @position += data ? data.bytesize : 0 data.to_s unless bytes && (data.nil? || data.empty?) end def remaining_bytes @last_byte - @position end end end end
Version data entries
39 entries across 39 versions & 1 rubygems