method

remote_ip

v1.1.6 - Show latest stable - Class: ActionController::AbstractRequest

remote_ip()

public

Determine originating IP address. REMOTE_ADDR is the standard but will fail if the user is behind a proxy. HTTP_CLIENT_IP and/or HTTP_X_FORWARDED_FOR are set by proxies so check for these before falling back to REMOTE_ADDR. HTTP_X_FORWARDED_FOR may be a comma- delimited list in the case of multiple chained proxies; the first is the originating IP.

# File actionpack/lib/action_controller/request.rb, line 93
    def remote_ip
      return @env['HTTP_CLIENT_IP'] if @env.include? 'HTTP_CLIENT_IP'

      if @env.include? 'HTTP_X_FORWARDED_FOR' then
        remote_ips = @env['HTTP_X_FORWARDED_FOR'].split(',').reject do |ip|
            ip =~ /^unknown$|^(10|172\.(1[6-9]|2[0-9]|30|31)|192\.168)\./i
        end

        return remote_ips.first.strip unless remote_ips.empty?
      end

      @env['REMOTE_ADDR']
    end

remote_ip

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