code: def _get_header(soap_action):
      
      # This way of setting accepted language is obviously flawed, in that it
      # depends on the locale settings of the system. However, I'm unsure if
      # they are actually used. The character coding is set elsewhere and I think
      # the available music in each country is bound to the account.
      language, _ = locale.getdefaultlocale()
      if language is None:
          language = ''
      else:
          language = language.replace('_', '-') + ', '
  
      header = {
          'CONNECTION': 'close',
          'ACCEPT-ENCODING': 'gzip',
          'ACCEPT-LANGUAGE': '{}en-US;q=0.9'.format(language),
          'Content-Type': 'text/xml; charset="utf-8"',
          'SOAPACTION': SOAP_ACTION[soap_action]
      }
      return header
docs: Return the HTTP for SOAP Action.
  
      :param soap_action: The soap action to include in the header. Can be either
          'search' or 'get_metadata'
      :type soap_action: str