We convert an error code into
        certain action over start_response and return a WSGI-compliant payload.

def canned_handlers(self, environ, start_response, code = '200', headers = []):
        '''
        We convert an error code into
        certain action over start_response and return a WSGI-compliant payload.
        '''
        headerbase = [('Content-Type', 'text/plain')]
        if headers:
            hObj = Headers(headerbase)
            for header in headers:
                hObj[header[0]] = '; '.join(header[1:])
        start_response(self.canned_collection[code], headerbase)
        return ['']