Class: SecureNative::Utils::RequestUtils

Inherits:
Object
  • Object
show all
Defined in:
lib/securenative/utils/request_utils.rb

Constant Summary collapse 

'_sn'
SECURENATIVE_HEADER = 
'x-securenative'
PREFIX = 
'HTTP_'

Class Method Summary collapse

Class Method Details

.get_client_ip_from_request(request, options) ⇒ Object 



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# File 'lib/securenative/utils/request_utils.rb', line 21

def self.get_client_ip_from_request(request, options)
  unless options.proxy_headers.nil?
    options.proxy_headers.each { |header|
      begin
        h = request.env[header]
        if h.nil?
          h = request.env[self.parse_ip(header)]
        end
        parsed = self.parse_proxy_header(h, header)
        if self.validate_ip(parsed)
          return parsed
        end
      rescue NoMethodError
        begin
          h = request[header]
          if h.nil?
            h = request.env[self.parse_ip(header)]
          end
          parsed = self.parse_proxy_header(h, header)
          if self.validate_ip(parsed)
            return parsed
          end
        rescue NoMethodError
          # Ignored
        end
      end
    }
  end

  begin
    header_value = request.env['HTTP_X_FORWARDED_FOR']
    if header_value.include? ','
      header_value = header_value.split(',')[0]
    end
    if self.validate_ip(header_value)
      return header_value
    end
  rescue NoMethodError
    begin
      header_value = request['HTTP_X_FORWARDED_FOR']
      if header_value.include? ','
        header_value = header_value.split(',')[0]
      end
      if self.validate_ip(header_value)
        return header_value
      end
    rescue NoMethodError
      # Ignored
    end
  end

  begin
    header_value = request.env['HTTP_X_REAL_IP']
    if header_value.include? ','
      header_value = header_value.split(',')[0]
    end
    if self.validate_ip(header_value)
      return header
    end
  rescue NoMethodError
    begin
      header_value = request['HTTP_X_REAL_IP']
      if header_value.include? ','
        header_value = header_value.split(',')[0]
      end
      if self.validate_ip(header_value)
        return header_value
      end
    rescue NoMethodError
      # Ignored
    end
  end

  begin
    header_value = request.env['REMOTE_ADDR']
    if header_value.include? ','
      header_value = header_value.split(',')[0]
    end
    if self.validate_ip(header_value)
      return header_value
    end
  rescue NoMethodError
    begin
      header_value = request['REMOTE_ADDR']
      if header_value.include? ','
        header_value = header_value.split(',')[0]
      end
      if self.validate_ip(header_value)
        return header_value
      end
    rescue NoMethodError
      # Ignored
    end
  end

  begin
    return request.ip unless request.ip.nil?
  rescue NoMethodError
    # Ignored
  end

  ''
end

.get_remote_ip_from_request(request) ⇒ Object 



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# File 'lib/securenative/utils/request_utils.rb', line 125

def self.get_remote_ip_from_request(request)
  begin
    request.remote_ip
  rescue NoMethodError
    ''
  end
end

.get_secure_header_from_request(headers) ⇒ Object 



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# File 'lib/securenative/utils/request_utils.rb', line 12

def self.get_secure_header_from_request(headers)
  begin
    return headers[SECURENATIVE_HEADER] unless headers.nil?
  rescue StandardError
    []
  end
  []
end

.parse_ip(headers) ⇒ Object 



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# File 'lib/securenative/utils/request_utils.rb', line 133

def self.parse_ip(headers)
  h = headers.gsub('-', '_')
  return PREFIX + h.upcase
end

.parse_proxy_header(headers, header_key) ⇒ Object 



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# File 'lib/securenative/utils/request_utils.rb', line 138

def self.parse_proxy_header(headers, header_key)
  h = headers.gsub(header_key + ': ', '')
  if headers.include? ','
    h = h.split(',')[0]
  end
  return h
end

.validate_ip(ip) ⇒ Object 



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# File 'lib/securenative/utils/request_utils.rb', line 146

def self.validate_ip(ip)
  if ip.nil?
    return false
  end

  begin
    ipaddr = IPAddr.new(ip)
    if ipaddr.ipv4?
      return true
    end

    if ipaddr.ipv6?
      return true
    end
  rescue Exception
    # Ignored
  end

  return false
end