Class: ActionDispatch::GzStatic

Inherits:
Object
  • Object
show all
Defined in:
lib/action_dispatch/gz_static.rb

Instance Method Summary collapse

Constructor Details

#initialize(app, root, cache_control = nil) ⇒ GzStatic

Returns a new instance of GzStatic.



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# File 'lib/action_dispatch/gz_static.rb', line 11

def initialize(app, root, cache_control=nil)
  @app           = app
  @root          = root.chomp('/')
  @compiled_root = /^#{Regexp.escape(@root)}/

  # I wish there was a better way to do this. Rack::File changed its
  # interface after 1.4.1 and I don't know of a way to sniff out the change
  # without comparing the gem version
  if Gem.loaded_specs['rack'].version > Gem::Version.new('1.4.1')
    cache_control = {'Cache-Control' => cache_control}
  end

  @file_server   = ::Rack::File.new(@root, cache_control)
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/action_dispatch/gz_static.rb', line 36

def call(env)
  case env['REQUEST_METHOD']
  when 'GET', 'HEAD'
    path = env['PATH_INFO'].chomp('/')
    if match = match?(path)

      compressed_match = "#{match}.gz"
      compressed_exists = File.file?(compressed_match)
        
      wants_compressed = !!(env['HTTP_ACCEPT_ENCODING'] =~ /\bgzip\b/)

      if wants_compressed && compressed_exists
        mime = Rack::Mime.mime_type(::File.extname(match), 'text/plain')
        match = compressed_match
      end

      match.sub!(@compiled_root, '')
      env["PATH_INFO"] = ::Rack::Utils.escape(match)
      status, headers, body = @file_server.call(env)

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

        if wants_compressed
          headers['Content-Encoding'] = 'gzip'
          headers['Content-Type'] = mime if mime
        end
      end

      return [status, headers, body]
    end
  end

  @app.call(env)
end

#escape_glob_chars(path) ⇒ Object 



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# File 'lib/action_dispatch/gz_static.rb', line 84

def escape_glob_chars(path)
  path.force_encoding('binary') if path.respond_to? :force_encoding
  path.gsub(/[*?{}\[\]]/, "\\\\\\&")
end

#ext ⇒ Object 



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# File 'lib/action_dispatch/gz_static.rb', line 72

def ext
  @ext ||= begin
    #ext = ::ActionController::Base.default_static_extension
    ext = ".html"
    "{,#{ext},/index#{ext}}"
  end
end

#match?(path) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/action_dispatch/gz_static.rb', line 26

def match?(path)
  path = path.dup

  full_path = path.empty? ? @root : File.join(@root, escape_glob_chars(unescape_path(path)))
  paths = "#{full_path}#{ext}"

  matches = Dir[paths]
  matches.detect { |m| File.file?(m) }
end

#unescape_path(path) ⇒ Object 



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# File 'lib/action_dispatch/gz_static.rb', line 80

def unescape_path(path)
  URI.parser.unescape(path)
end