class Deas::Runner::SendFileBody

Constants

CHUNK_SIZE

this class borrows from the body range handling in Rack::File.

Attributes

content_range[R]
path_name[R]
size[R]

Public Class Methods

new(env, path_name) click to toggle source
# File lib/deas/runner.rb, line 238
def initialize(env, path_name)
  @path_name = path_name

  file_size = @path_name.size? || Rack::Utils.bytesize(path_name.read)
  ranges = byte_ranges(env, file_size)
  if ranges.nil? || ranges.empty? || ranges.length > 1
    # No ranges or multiple ranges are not supported
    @range         = 0..file_size-1
    @content_range = nil
  else
    # single range
    @range         = ranges[0]
    @content_range = "bytes #{@range.begin}-#{@range.end}/#{file_size}"
  end

  @size = self.range_end - self.range_begin + 1
end

Public Instance Methods

==(other_body) click to toggle source
# File lib/deas/runner.rb, line 283
def ==(other_body)
  self.path_name.to_s == other_body.path_name.to_s &&
  self.range_begin    == other_body.range_begin    &&
  self.range_end      == other_body.range_end
end
each() { |part| ... } click to toggle source
# File lib/deas/runner.rb, line 263
def each
  @path_name.open("rb") do |io|
    io.seek(@range.begin)
    remaining_len = self.size
    while remaining_len > 0
      part = io.read([CHUNK_SIZE, remaining_len].min)
      break if part.nil?

      remaining_len -= part.length
      yield part
    end
  end
end
inspect() click to toggle source
# File lib/deas/runner.rb, line 277
def inspect
  "#<#{self.class}:#{'0x0%x' % (self.object_id << 1)} " \
    "path=#{self.path_name} " \
    "range_begin=#{self.range_begin} range_end=#{self.range_end}>"
end
partial?() click to toggle source
# File lib/deas/runner.rb, line 256
def partial?
  !@content_range.nil?
end
range_begin() click to toggle source
# File lib/deas/runner.rb, line 260
def range_begin; @range.begin; end
range_end() click to toggle source
# File lib/deas/runner.rb, line 261
def range_end;   @range.end;   end

Private Instance Methods

byte_ranges(env, file_size) click to toggle source
# File lib/deas/runner.rb, line 291
def byte_ranges(env, file_size)
  if Rack::Utils.respond_to?('byte_ranges')
    Rack::Utils.byte_ranges(env, file_size)
  else
    nil
  end
end