Class: BinData::Transform::Brotli

Inherits:
IO::Transform show all
Defined in:
lib/bindata/transform/brotli.rb

Overview

Transforms a brotli compressed data stream.

gem install brotli

Instance Method Summary collapse

Methods inherited from IO::Transform

#before_transform, #num_bytes_remaining, #offset, #prepend_to_chain, #seek_abs, #seekable?, #skip, transform_changes_stream_length!

Constructor Details

#initialize(read_length) ⇒ Brotli

Returns a new instance of Brotli.



11
12
13
14
 
# File 'lib/bindata/transform/brotli.rb', line 11

def initialize(read_length)
  super()
  @length = read_length
end

Instance Method Details

#after_read_transform ⇒ Object

Raises:

  • (IOError) 


26
27
28
 
# File 'lib/bindata/transform/brotli.rb', line 26

def after_read_transform
  raise IOError, "didn't read all data" unless @read.empty?
end

#after_write_transform ⇒ Object 



30
31
32
 
# File 'lib/bindata/transform/brotli.rb', line 30

def after_write_transform
  chain_write(::Brotli::deflate(@write))
end

#read(n) ⇒ Object 



16
17
18
19
 
# File 'lib/bindata/transform/brotli.rb', line 16

def read(n)
  @read ||= ::Brotli::inflate(chain_read(@length))
  @read.slice!(0...n)
end

#write(data) ⇒ Object 



21
22
23
24
 
# File 'lib/bindata/transform/brotli.rb', line 21

def write(data)
  @write ||= create_empty_binary_string
  @write << data
end