Class: HTTP::Features::AutoDeflate

Inherits:
HTTP::Feature show all
Defined in:
lib/http/features/auto_deflate.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ AutoDeflate

Returns a new instance of AutoDeflate.

Raises:



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# File 'lib/http/features/auto_deflate.rb', line 10

def initialize(*)
  super

  @method = @opts.key?(:method) ? @opts[:method].to_s : "gzip"

  raise Error, "Only gzip and deflate methods are supported" unless %w(gzip deflate).include?(@method)
end

Instance Attribute Details

#method ⇒ Object (readonly)

Returns the value of attribute method.



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# File 'lib/http/features/auto_deflate.rb', line 8

def method
  @method
end

Instance Method Details

#deflate(headers, body) ⇒ Object 



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# File 'lib/http/features/auto_deflate.rb', line 18

def deflate(headers, body)
  return body unless body
  return body unless body.is_a?(String)

  # We need to delete Content-Length header. It will be set automatically
  # by HTTP::Request::Writer
  headers.delete(Headers::CONTENT_LENGTH)

  headers[Headers::CONTENT_ENCODING] = method

  case method
  when "gzip" then
    StringIO.open do |out|
      Zlib::GzipWriter.wrap(out) do |gz|
        gz.write body
        gz.finish
        out.tap(&:rewind).read
      end
    end
  when "deflate" then
    Zlib::Deflate.deflate(body)
  else
    raise ArgumentError, "Unsupported deflate method: #{method}"
  end
end