Class: Async::HTTP::ContentEncoding

Inherits:
Middleware show all
Defined in:
lib/async/http/content_encoding.rb

Overview

Encode a response according the the request’s acceptable encodings.

Constant Summary collapse

DEFAULT_WRAPPERS = 
{
	'gzip' => Body::Deflate.method(:for)
}
DEFAULT_CONTENT_TYPES = 
%r{^(text/.*?)|(.*?/json)|(.*?/javascript)$}

Instance Method Summary collapse

Methods inherited from Middleware

build, #close

Constructor Details

#initialize(app, content_types = DEFAULT_CONTENT_TYPES, wrappers = DEFAULT_WRAPPERS) ⇒ ContentEncoding

Returns a new instance of ContentEncoding.



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# File 'lib/async/http/content_encoding.rb', line 36

def initialize(app, content_types = DEFAULT_CONTENT_TYPES, wrappers = DEFAULT_WRAPPERS)
	super(app)
	
	@content_types = content_types
	@wrappers = wrappers
end

Instance Method Details

#call(request) ⇒ Object 



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# File 'lib/async/http/content_encoding.rb', line 43

def call(request, *)
	response = super
	
	if !response.body.empty? and accept_encoding = request.headers['accept-encoding']
		if content_type = response.headers['content-type'] and @content_types.match?(content_type)
			# TODO use http-accept and sort by priority
			encodings = accept_encoding.split(/\s*,\s*/)
			
			body = response.body
			
			encodings.each do |name|
				if wrapper = @wrappers[name]
					response.headers['content-encoding'] = name
					
					body = wrapper.call(body)
					
					break
				end
			end
			
			response.body = body
		end
	end
	
	return response
end