Class: FaradayMiddleware::Gzip

Inherits:
Faraday::Middleware
  • Object
show all
Defined in:
lib/dacpclient/faraday/gzip.rb

Overview

A middleware that ensures that the client requests are sent with the headers that encourage servers to send compressed data, and then uncompresses it. The Content-Length will reflect the actual body length.

Constant Summary collapse

ACCEPT_ENCODING = 
'Accept-Encoding'.freeze
ENCODINGS = 
'gzip,deflate'.freeze

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ Gzip

Returns a new instance of Gzip.



12
13
14
 
# File 'lib/dacpclient/faraday/gzip.rb', line 12

def initialize(app)
  @app = app
end

Instance Method Details

#call(curenv) ⇒ Object 



16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
 
# File 'lib/dacpclient/faraday/gzip.rb', line 16

def call(curenv)
  (curenv[:request_headers] ||= {})[ACCEPT_ENCODING] = ENCODINGS
  @app.call(curenv).on_complete do |env|
    encoding = env[:response_headers]['content-encoding'].to_s.downcase
    if %w(gzip deflate).include?(encoding)
      case encoding
      when 'gzip'
        env[:body] = uncompress_gzip(env[:body])
      when 'deflate'
        env[:body] = Zlib::Inflate.inflate(env[:body])
      end
      env[:response_headers].delete('content-encoding')
      env[:response_headers]['content-length'] = env[:body].length
    end
  end
end