#二次更新 利用DNSPodAPI实现服务器DDNS解析

更新说明：更新了上一篇文章：利用DNSPodAPI实现服务器DDNS解析中存留的更新卡住问题。

前面的文章中，我们使用了此脚本来进行DDNS更新，但是我发现了一个问题，更新后，程序未退出，虽然放在后台影响不大，但是省一点内存是一点。

脚本：

#!/usr/bin/env python
# -*- coding:utf-8 -*-


import socket
import requests
import time
import logging

logging.basicConfig(level=logging.WARNING)
logger = logging.getLogger(__name__)


class DNSPod(object):
    """DNSPod ddns application."""

    def __init__(self, params):
        """Initialize with params."""
        self._params = params

    def run(self, params=None):
        if params is None:
            params = self._params
        public_ip = self.get_public_ip()
        # get record_id of sub_domain
        record_list = self.get_record_list(params)
        if record_list['code'] == '10':
            # create record for empty sub_domain
            record_id = self.create_record(params, public_ip)
            remote_ip = public_ip
        elif record_list['code'] == '1':
            # get record id
            record_id = record_list['record_id']
            remote_ip = record_list['ip_value']
        else:
            logger.error('!!!can not get record_id!!!')
            return -1
        params['record_id'] = record_id

        current_ip = remote_ip
        while True:
            try:
                public_ip = self.get_public_ip()
                if current_ip != public_ip:
                    logger.warning("update IP from %s to %s" % (current_ip, public_ip))
                    if self.ddns(params, public_ip):
                        current_ip = public_ip
                else:
                    logger.info("IP remains %s" % public_ip)
            except Exception as e:
                logger.error(e)
            exit()
            pass
            time.sleep(300)

    def get_public_ip(self):
        """Get public ip via dnspod."""
        sock = socket.create_connection(('ns1.dnspod.net', 6666), timeout=30)
        ip = sock.recv(16)
        sock.close()
        return ip.decode('utf-8')

    def get_record_list(self, params):
        """Get record list.

        https://www.dnspod.cn/docs/records.html#record-list
        :return: dict of code, record_id and IP value
        """
        record_list_url = 'https://dnsapi.cn/Record.List'
        r = requests.post(record_list_url, data=params)
        code = r.json()['status']['code']
        record_id = r.json()['records'][0]['id'] if code == '1' else ""
        ip_value = r.json()['records'][0]['value'] if code == '1' else ""
        return dict(code=code, record_id=record_id, ip_value=ip_value)

    def create_record(self, params, ip):
        """Create record if not created before.

        https://www.dnspod.cn/docs/records.html#record-create
        :return: record_id of new record
        """
        params['value'] = ip
        record_create_url = 'https://dnsapi.cn/Record.Create'
        r = requests.post(record_create_url, data=params)
        logger.warning('create new record %s.%s with IP %s' % (params['sub_domain'], params['domain'], ip))
        assert r.json()['status']['code'] == '1'
        record_id = r.json()['record']['id']
        return record_id

    def ddns(self, params, ip):
        """Update ddns ip.

        https://www.dnspod.cn/docs/records.html#dns
        """
        params['value'] = ip
        ddns_url = 'https://dnsapi.cn/Record.Ddns'
        r = requests.post(ddns_url, data=params)
        logger.info('status: %s, reason: %s' % (r.status_code, r.reason))
        return r.json()['status']['code'] == '1'


def main():
    # initialize params
    # Use Token, check https://support.dnspod.cn/Kb/showarticle/tsid/227
    ID = '请输入id'  # replace with your ID
    Token = '请输入token'  # replace with your Token
    params = dict(
        login_token=("%s,%s" % (ID, Token)),
        format='json',
        domain='请输入主域名',  # replace with your domain
        sub_domain='需要解析的二级域名名字',  # replace with your sub_domain
        record_type='A',
        record_line='默认'
    )

    dnspod = DNSPod(params)
    dnspod.run()


if __name__ == "__main__":
    main()

简单解释下，就是加一个exit()即可退出，请注意蓝色文字，其他配置信息请参考前一篇文章进行处理。