Class: ServeByteRange::MultipartByteRangesBody

Inherits:
ByteRangeBody show all
Defined in:
lib/serve_byte_range.rb

Overview

See www.ietf.org/archive/id/draft-ietf-httpbis-p5-range-09.html

Instance Method Summary collapse

Methods inherited from ByteRangeBody

#status

Constructor Details

#initialize(http_ranges:, boundary:, **params_for_single_range, &serving_block) ⇒ MultipartByteRangesBody 



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# File 'lib/serve_byte_range.rb', line 123

def initialize(http_ranges:, boundary:, **params_for_single_range, &serving_block)
  super(http_range: http_ranges.first, **params_for_single_range)
  @http_ranges = http_ranges
  @boundary = boundary
end

Instance Method Details

#content_length ⇒ Object 



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# File 'lib/serve_byte_range.rb', line 139

def content_length
  # The Content-Length of a multipart response includes the length
  # of all the ranges of the resource, but also the lengths of the
  # multipart part headers - which we need to precompute. To do it
  # we need to run through all of our ranges and output some strings,
  # and if a lot of ranges are involved this can get expensive. So
  # memoize the envelope size (it never changes between calls)
  @envelope_size ||= compute_envelope_size
end

#content_type ⇒ Object 



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# File 'lib/serve_byte_range.rb', line 149

def content_type
  "multipart/byteranges; boundary=#{@boundary}"
end

#each {|trailer| ... } ⇒ Object

Yields:

  • (trailer) 


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# File 'lib/serve_byte_range.rb', line 129

def each(&blk)
  @http_ranges.each_with_index do |range, part_i|
    yield(part_header(range, part_i))
    writable_for_range_bytes = BlockWritableWithLimit.new(range.size, &blk)
    @serving_block.call(range, writable_for_range_bytes)
    writable_for_range_bytes.verify!
  end
  yield(trailer)
end

#headers ⇒ Object 



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# File 'lib/serve_byte_range.rb', line 153

def headers
  super.tap do |hh|
    hh.delete("Content-Range")
  end
end