authentication_header(controller, realm) public

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# File actionpack/lib/action_controller/metal/http_authentication.rb, line 255
      def authentication_header(controller, realm)
        secret_key = secret_token(controller.request)
        nonce = self.nonce(secret_key)
        opaque = opaque(secret_key)
        controller.headers["WWW-Authenticate"] = %(Digest realm="#{realm}", qop="auth", algorithm=MD5, nonce="#{nonce}", opaque="#{opaque}")
      end
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