基于python利用腾讯云API Explorer实现家用宽带的动态DNS解析

$ pip install --upgrade tencentcloud-sdk-python

"Response": {
  "RequestId": "a3bee0a2-bac6-43db-b76d-a4ce11cec0c7",
  "RecordCountInfo": {
    "SubdomainCount": 23,
    "TotalCount": 23,
    "ListCount": 23
  },
  "RecordList": [
    {
      "Value": "59.52.241.247",
      "Status": "ENABLE",
      "UpdatedOn": "2021-08-13 20:03:43",
      "Name": "homesource",
      "Line": "默认",
      "LineId": "0",
      "Type": "A",
      "Weight": null,
      "MonitorStatus": "",
      "Remark": "",
      "RecordId": 760223447,
      "TTL": 600,
      "MX": 0
    }
  ]
}

{
  "RecordId": 760223447,
  "RequestId": "2542afb0-bc7c-4c2e-b864-ca1d73795cdf"
}

def ReturnRecordId(Domain, SubDomain):
    try:
        cred = credential.Credential(SecretId, SecretKey)
        httpProfile = HttpProfile()
        httpProfile.endpoint = "dnspod.tencentcloudapi.com"
    clientProfile = ClientProfile()
    clientProfile.httpProfile = httpProfile
    client = dnspod_client.DnspodClient(cred, "", clientProfile)

    req = models.DescribeRecordListRequest()
    params = {
        "Domain": Domain
    }
    req.from_json_string(json.dumps(params))

    resp = client.DescribeRecordList(req)
    for record in resp.RecordList:
        if record.Name == SubDomain:
            return record.RecordId
    print("未找到对应的记录值，请先创建相应的主机记录！")
    return -2

except TencentCloudSDKException as err:
    print("获取域名的记录列表失败，请重试！")
    return -1</code></pre></div></div><h4 id="77u2n" name="ModifyDynamicDNS%E6%8E%A5%E5%8F%A3%E5%B0%81%E8%A3%85%E6%88%90%E5%87%BD%E6%95%B0%EF%BC%8C%E4%BE%BF%E4%BA%8E%E8%B0%83%E7%94%A8">ModifyDynamicDNS接口封装成函数，便于调用</h4><p>封装好的<code>ModifyDynamicDNS</code>函数如下所示：</p><div class="rno-markdown-code"><div class="rno-markdown-code-toolbar"><div class="rno-markdown-code-toolbar-info"><div class="rno-markdown-code-toolbar-item is-type"><span class="is-m-hidden">代码语言：</span>txt</div></div><div class="rno-markdown-code-toolbar-opt"><div class="rno-markdown-code-toolbar-copy"><i class="icon-copy"></i><span class="is-m-hidden">复制</span></div></div></div><div class="developer-code-block"><pre class="prism-token token line-numbers language-txt"><code class="language-txt" style="margin-left:0">def ModifyDynamicDNS(RecordId, Domain ,SubDomain, Ip):
try:
    cred = credential.Credential(SecretId, SecretKey)
    httpProfile = HttpProfile()
    httpProfile.endpoint = &#34;dnspod.tencentcloudapi.com&#34;

    clientProfile = ClientProfile()
    clientProfile.httpProfile = httpProfile
    client = dnspod_client.DnspodClient(cred, &#34;&#34;, clientProfile)

    req = models.ModifyDynamicDNSRequest()
    params = {
        &#34;Domain&#34;: Domain,
        &#34;SubDomain&#34;: SubDomain,
        &#34;RecordId&#34;: RecordId,
        &#34;RecordLine&#34;: &#34;默认&#34;,
        &#34;Value&#34;: Ip
    }
    req.from_json_string(json.dumps(params))

    resp = client.ModifyDynamicDNS(req)
    if str(RecordId) in resp.to_json_string():
        print(&#34;更新成功！&#34;)
    return 1
except TencentCloudSDKException as err:
    return 0</code></pre></div></div><h4 id="bf799" name="%E5%AE%9A%E6%97%B6%E8%8E%B7%E5%8F%96%E5%BD%93%E5%89%8D%E7%9A%84IP%E5%9C%B0%E5%9D%80">定时获取当前的IP地址</h4><p>实现动态DNS解析，首先要获得当前本地的公网IP，然后将改IP提交到相应的API中。目前有很多免费公共的本地IP查询接口，这里我们选择的是：<code>https://ip.tool.lu/</code>，这个网站返回的结果更快，但是其返回的结果不是标准的JSON或其他标准数据格式，如下所示：</p><div class="rno-markdown-code"><div class="rno-markdown-code-toolbar"><div class="rno-markdown-code-toolbar-info"><div class="rno-markdown-code-toolbar-item is-type"><span class="is-m-hidden">代码语言：</span>txt</div></div><div class="rno-markdown-code-toolbar-opt"><div class="rno-markdown-code-toolbar-copy"><i class="icon-copy"></i><span class="is-m-hidden">复制</span></div></div></div><div class="developer-code-block"><pre class="prism-token token line-numbers language-txt"><code class="language-txt" style="margin-left:0">当前IP: 59.52.217.194 归属地: 中国 江西 南昌</code></pre></div></div><p>因此首先我们对该数据进行处理，提取IP地址。</p><p>然后，在获得IP地址后与先前的IP地址进行对比，判断IP是否发生变化，如果发生变化则将变动通过API提交。IP检查每隔一段时间运行一次，保证IP检测全方位无死角！这里用正则表达式和request模块完成IP提取方法，代码如下所示：</p><div class="rno-markdown-code"><div class="rno-markdown-code-toolbar"><div class="rno-markdown-code-toolbar-info"><div class="rno-markdown-code-toolbar-item is-type"><span class="is-m-hidden">代码语言：</span>txt</div></div><div class="rno-markdown-code-toolbar-opt"><div class="rno-markdown-code-toolbar-copy"><i class="icon-copy"></i><span class="is-m-hidden">复制</span></div></div></div><div class="developer-code-block"><pre class="prism-token token line-numbers language-txt"><code class="language-txt" style="margin-left:0">import requests

import re

def GetCurrentIP():

resp = requests.get('https://ip.tool.lu/').content

resp = resp.decode('utf8')

IPPattern = '\d+.\d+.\d+.\d+'

matchObj = re.search(IPPattern, resp)

return matchObj.group()
ip = GetCurrentIP()

import time

interval = 600 # 每10分钟检查一次IP

OldIP = ""

while True:

CurrentIP = GetCurrentIP()

if OldIP != CurrentIP:

res = ModifyDynamicDNS(RecordId=RecordId, Domain=Domain, SubDomain=SubDomain, Ip = CurrentIP)

if res:

print(f'IP成功更新！原IP:{OldIP}，新IP:{CurrentIP}')

OldIP = CurrentIP

else:

print('动态域名解析API出问题了，正在重试！')

continue

time.sleep(interval)

if __name__ == "__main__":

SecretId = ""

SecretKey = ""

Domain = "eatrice.cn" # 主域名

SubDomain = "homesource" # 指定要修改的子域名

interval = 600 # 每10分钟检查一次IP

RecordId = ReturnRecordId(Domain=Domain, SubDomain=SubDomain)

if RecordId == -1:

print("RecordList请求发生问题！")

exit()

if RecordId == -2:

print("没有找到你要的子域名，请先新建一个！")

OldIP = ""

while True:

CurrentIP = GetCurrentIP()

if OldIP != CurrentIP:

res = ModifyDynamicDNS(RecordId=RecordId, Domain=Domain, SubDomain=SubDomain, Ip = CurrentIP)

if res:

print(f'IP成功更新！原IP:{OldIP}，新IP:{CurrentIP}')

OldIP = CurrentIP

else:

print('动态域名解析API出问题了，正在重试！')

continue

time.sleep(interval)