Module: Aaalex::PermanentCookies

Defined in:
lib/permanent_cookies.rb

Constant Summary collapse

MAX = 
4096
PCOOKIE_SUFFIX = 
"_pcookie"
SECRET = 
"534b44a19bf18d20b71ecc4eb77c572f"

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/permanent_cookies.rb', line 3

def self.included(base)
  base.around_filter :permanent_cookies
end

Instance Method Details

#generate_digest(data) ⇒ Object

end



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# File 'lib/permanent_cookies.rb', line 41

def generate_digest(data)
  OpenSSL::HMAC.hexdigest(OpenSSL::Digest::Digest.new('SHA1'), SECRET, data)
end

#marshal(var) ⇒ Object 



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# File 'lib/permanent_cookies.rb', line 44

def marshal(var)
  data = ActiveSupport::Base64.encode64(Marshal.dump(var)).chop
  "#{data}--#{generate_digest(data)}"
end

#permanent_cookies ⇒ Object 



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# File 'lib/permanent_cookies.rb', line 11

def permanent_cookies
  @pcookies = {}
  cookies.each_pair do |cname, cvalue|
    if cname.include?(PCOOKIE_SUFFIX)
      @pcookies[cname.split(PCOOKIE_SUFFIX).first] = unmarshal( cvalue.first)
    end
  end
  logger.info "got pcookie\n#{@pcookies.to_yaml}"

  yield

  @pcookies.each_pair do |pcookie_name, pcookie_val|
    pc_val = if pcookie_val.is_a?( Hash)
      pcookie_val
    else
      { :value => pcookie_val,
        :expires => 1.week.from_now }
    end
    pc_val[:value] = marshal pc_val[:value]
    raise StandardError if pc_val[:value].size > MAX
    cookies[pcookie_name + PCOOKIE_SUFFIX] = pc_val
  end
  # delete all other unused pcookies
#      pcookies = defined?(@pcookies) ? @pcookies : {}
#      cookies.each_key do |cookie|
#        if cookie.include?(PCOOKIE_SUFFIX) && !pcookies.key?(cookie)
#          cookies[cookie] = {:value => nil, :expires => 1.year.ago}
#        end
#      end
end

#unmarshal(cookie) ⇒ Object 



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# File 'lib/permanent_cookies.rb', line 48

def unmarshal(cookie)
  if cookie
    data, digest = cookie.split('--')
    unless digest == generate_digest(data) || digest == generate_digest(data = CGI.unescape(data))
      # tampered with cookie
      raise StandardError
    end
    Marshal.load(ActiveSupport::Base64.decode64(data))
  end
end