Class: Rack::GzFile

Inherits:
Object
  • Object
show all
Defined in:
lib/rack/gz_file.rb,
lib/rack/gz_file/version.rb

Overview

Rack::GzFile behaves exactly the same as Rack::File, except that it will also serve up a gzip encoding of a file, if one is available on the filesystem.

For each request, Rack::GzFile first checks the filesystem for a file with a .gz extension. If one is found, the appropriate encoding headers are added to the response and the gzip file is served.

If no .gz file is found, Rack::GzFile will behave exactly like Rack::File.

Constant Summary collapse

VERSION = 
"0.2.0"

Instance Method Summary collapse

Constructor Details

#initialize(root, headers = {}, default_mime = 'text/plain') ⇒ GzFile

Returns a new instance of GzFile.



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# File 'lib/rack/gz_file.rb', line 12

def initialize(root, headers={}, default_mime = 'text/plain')
  @file_server = if Rack::File.instance_method(:initialize).arity.abs == 2
    Rack::File.new(root, headers) # for Rack < 1.5.0
  else
    Rack::File.new(root, headers, default_mime)
  end
  @default_mime = default_mime
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/rack/gz_file.rb', line 21

def call(env)
  path_info = env['PATH_INFO']
  status = nil

  if env['HTTP_ACCEPT_ENCODING'] =~ /\bgzip\b/
    status, headers, body = @file_server.call(
      env.merge('PATH_INFO' => path_info + '.gz')
    )
  end

  case status
  when 200
    headers['Content-Type']     = Mime.mime_type(::File.extname(path_info), @default_mime)
    headers['Content-Encoding'] = 'gzip'
  when 304
  else
    status, headers, body = @file_server.call(env)
  end

  headers['Vary'] = 'Accept-Encoding'

  [status, headers, body]
end