DNSPod DDNS Python Script

README.md

替换上你的ID, Token, domain, sub_domain 就可以运行了。(ID,Token) 可以从 API 鉴权方式升级为 Token 获得。 脚本会在后台一直运行，初始化时会根据 sub_domain 查询是否已经创建，每隔30秒检查一遍IP，如果修改了就更新IP。

以 Archlinux 为例，按照如下步骤操作即可设置开机启动这个 DDNS 服务。

sudo wget -O /usr/local/bin/dnspod_ddns.py https://gist.github.com/billryan/239778f0821937939c8c140bdddd6840/raw/dnspod_ddns.py
sudo chmod +x /usr/local/bin/dnspod_ddns.py
sudo wget -O /etc/systemd/system/dnspod-ddns.py.service https://gist.github.com/billryan/239778f0821937939c8c140bdddd6840/raw/dnspod-ddns.service
sudo systemctl start dnspod-ddns
sudo systemctl enable dnspod-ddns

更详细的教程可移步 https://blog.yuanbin.me/posts/2016/07/DDNS-for-home-server.html

dnspod-ddns.service

[Unit]
Description=DNSPod DDNS Service
After=network.target

[Service]
Type=simple
ExecStart=/usr/local/bin/dnspod_ddns.py
KillSignal=SIGINT
Restart=on-failure
RestartSec=5

[Install]
WantedBy=multi-user.target

dnspod_ddns.py

#!/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)
                pass
            time.sleep(30)

    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 = '23333'  # replace with your ID
    Token = '233333333333333333333333'  # replace with your Token
    params = dict(
        login_token=("%s,%s" % (ID, Token)),
        format='json',
        domain='example.com',  # replace with your domain
        sub_domain='test',  # replace with your sub_domain
        record_type='A',
        record_line='默认'
    )

    dnspod = DNSPod(params)
    dnspod.run()


if __name__ == "__main__":
    main()

readme 有手误，
sudo wget -O /etc/systemd/system/dnspod-ddns.py.service https://gist.github.com/billryan/239778f0821937939c8c140bdddd6840/raw/dnspod-ddns.service
应为
sudo wget -O /etc/systemd/system/dnspod-ddns.service https://gist.github.com/billryan/239778f0821937939c8c140bdddd6840/raw/dnspod-ddns.service

If your get_public_ip also failed, try to replace it with this:

    def get_public_ip(self):
        """Get public ip via dnspod."""
        res = requests.get("http://www.net.cn/static/customercare/yourip.asp")
        matches = re.search('(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})', res.text)
        ip = matches.group(0)
        return ip