def get_all_response_headers(self):
        ''' Gets back all response headers. '''

        bstr_headers = c_void_p()
        _WinHttpRequest._GetAllResponseHeaders(self, byref(bstr_headers))
        bstr_headers = ctypes.cast(bstr_headers, c_wchar_p)
        headers = bstr_headers.value
        _SysFreeString(bstr_headers)
        return headers
Gets back all response headers.