resolver.py 文件源码

def read_registry(self):
        """Extract resolver configuration from the Windows registry."""
        lm = _winreg.ConnectRegistry(None, _winreg.HKEY_LOCAL_MACHINE)
        want_scan = False
        try:
            try:
                # XP, 2000
                tcp_params = _winreg.OpenKey(lm,
                                             r'SYSTEM\CurrentControlSet'
                                             r'\Services\Tcpip\Parameters')
                want_scan = True
            except EnvironmentError:
                # ME
                tcp_params = _winreg.OpenKey(lm,
                                             r'SYSTEM\CurrentControlSet'
                                             r'\Services\VxD\MSTCP')
            try:
                self._config_win32_fromkey(tcp_params)
            finally:
                tcp_params.Close()
            if want_scan:
                interfaces = _winreg.OpenKey(lm,
                                             r'SYSTEM\CurrentControlSet'
                                             r'\Services\Tcpip\Parameters'
                                             r'\Interfaces')
                try:
                    i = 0
                    while True:
                        try:
                            guid = _winreg.EnumKey(interfaces, i)
                            i += 1
                            key = _winreg.OpenKey(interfaces, guid)
                            if not self._win32_is_nic_enabled(lm, guid, key):
                                continue
                            try:
                                self._config_win32_fromkey(key)
                            finally:
                                key.Close()
                        except EnvironmentError:
                            break
                finally:
                    interfaces.Close()
        finally:
            lm.Close()