Class: XRealIp::Middleware

Inherits:
Object
  • Object
show all
Defined in:
lib/x-real-ip/middleware.rb

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ Middleware

Returns a new instance of Middleware.



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# File 'lib/x-real-ip/middleware.rb', line 3

def initialize(app)
  @app = app
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/x-real-ip/middleware.rb', line 18

def call(env)
  real_ips  = env["HTTP_X_REAL_IP"]
  if real_ips
    # for Rails logger
    env["HTTP_X_FORWARDED_FOR"] = real_ips
  else
    real_ips  = env["HTTP_X_FORWARDED_FOR"]
  end
  if real_ips
    proxies = []
    list = real_ips.split(',')
    return @app.call(env) if list.empty?
    begin
      list.push env["REMOTE_ADDR"]
      while tmp = list.pop
        addr = tmp
        if is_trusted?(tmp)
          proxies.push tmp
        else
          break
        end
      end
      
      if addr
        env["x.proxies"] = proxies.join(',')
        env["REMOTE_ADDR"] = addr
        proto = env["HTTP_X_FORWARDED_PROTO"] || env['HTTP_X_REAL_PROTO']
        if (proto && proto == 'https')
          env["rack.url_scheme"] = 'https'
        end
      end
    rescue => e
      $stderr.puts "Error in x-real-ip: #{e.message}"
      $stderr.puts "Backtrace:\n\t#{e.backtrace.join("\n\t")}"
    end
  end
  @app.call(env)
end

#is_trusted?(str) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/x-real-ip/middleware.rb', line 7

def is_trusted?(str)
  begin
    ip = IPAddr.new(str.strip)
  rescue Exception => e
    $stderr.puts "Error in x-real-ip parsing address '#{str.strip}': #{e.message}"
    $stderr.puts "Backtrace:\n\t#{e.backtrace.join("\n\t")}"
    raise e
  end
  XRealIp.trusted.any? { |proxy| proxy === ip }
end