Class: Rack::ETag

Inherits:
Object show all
Defined in:
lib/vendor/etag.rb

Overview

Automatically sets the ETag header on all String bodies

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ ETag

Returns a new instance of ETag.



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# File 'lib/vendor/etag.rb', line 6

def initialize(app)
  @app = app
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/vendor/etag.rb', line 10

def call(env)
  status, headers, body = @app.call(env)

  unless headers.key?('Etag')
    hashes = []
    body.each{|chunk| hashes << chunk.hash }
    headers['Etag'] = %("#{Digest::MD5.hexdigest(hashes.join)}")
  end

  [status, headers, body]
end