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家庭NAS——DDNS篇

家庭NAS最大的一个问题之一就是公网IP不固定,这个问题的解决方法很多,如:
1.路由器刷固件;
2.群晖:白群晖自带内网穿透,黑群晖就放弃这个方案吧;
3.花生壳/花生棒:支持各类操作系统平台(路由器/Windows/Linux/群晖),缺点是需要花钱;
4.阿里云DDNS:强烈推荐;
5.腾讯云DDNS:推荐,证书验证不如阿里云方便。
6.ngrok等内网传统方案

我买了黑群晖,家用路由器是小米的,所以对于我来说通过阿里云DDNS和腾讯云DDNS是最好的方案,我的域名是在阿里云上注册的,所以,我直接采用了阿里云DDNS方案。

思路是:每隔一定时间获取当前的公网ip,把阿里云的域名解析地址更改为获取到的公网ip

最直观的获取ip的方法是

后续我们获取到ip后可以跟此ip对比,验证是否正确

node 获取ip方式有好多,我尝试了public-ip、http 请求等方法

// npm install --save public-ip const publicIp = require('public-ip'); publicIp.v4().then(ip => { console.log(ip); //=> '46.5.21.123' }); 

很有意思的是我利用public-ip这个库请求到的ip地址跟我百度的ip地址并不一样,这个问题我后续探究下

所以我直接使用http请求,获取到用户公网ip,代码如下

 const http = require('http') // 获取用户公网ip const url = 'http://txt.go.sohu.com/ip/soip' http.get(url, res => { let data = '' res.on('data', chunk => data += chunk) res.on('end', () => { let m = data.match(/\d+\.\d+\.\d+\.\d+/g) if (m.length > 0) { console.log('myIP', m[0]) } }) }).on('error', e => console.log(`error messsage: ${e.message}`)) 

这样获取到的ip地址跟百度出来的ip地址是一样的

// npm install @alicloud/pop-core --save const Core = require('@alicloud/pop-core'); var client = new Core({ accessKeyId: 'xxxxxxxx', accessKeySecret: 'xxxxxxxx', endpoint: 'https://alidns.aliyuncs.com', apiVersion: '2015-01-09' }); 

通过文档我们可以发现,如果需要修改解析地址,我们需要用到被修改解析记录的RecordId,
所以我们先获取到RecordId

var params = { // 参数可根据自己需求去增加 "RegionId": "cn-hangzhou", "DomainName": "baidu.com", "KeyWord": "A" } var requestOption = { method: 'POST' }; client.request('DescribeDomainRecords', params, requestOption).then((res) => { console.log(JSON.stringify(res)); if(res.DomainRecords.Record) { // 我修改的是根域名,所以筛选了下 let recordList = res.DomainRecords.Record.filter(item => { return item.Type === 'A' }) let recordID = recordList[0].RecordId // 此处获取到的就是RecordId,可根据自己需求修改逻辑 } else { console.log('DomainRecords record is null') } }, (ex) => { console.log(ex); }) 

根据获取到的RecordId将获取到的公网ip赋值

var params = { "RegionId": "cn-hangzhou", "RecordId": recordID, "RR": "@", "Type": "A", "Value": myIP } var requestOption = { method: 'POST' }; this.client.request('UpdateDomainRecord', params, requestOption).then((result) => { // console.log(JSON.stringify(result)); console.log('修改成功,公网IP为', myIP) }, (ex) => { console.log(ex); }) 

以上就是修改ip的全过程,后续我们再利用node-schedule做个定时任务就可以了,整体代码如下

const http = require('http') const Core = require('@alicloud/pop-core'); const schedule = require('node-schedule'); class AliDDNS { constructor() { this.myIP = '' this.accessKeyId = '' this.accessKeySecret = '' this.domainName = '' this.KeyWord = '@' } init () { this.getIP() this.initCore() this.getDomainNameID() } getIP () { // 获取用户公网ip const url = 'http://txt.go.sohu.com/ip/soip' http.get(url, res => { let data = '' res.on('data', chunk => data += chunk) res.on('end', () => { let m = data.match(/\d+\.\d+\.\d+\.\d+/g) if (m.length > 0) { this.myIP = m[0] console.log('myIP', this.myIP) } }) }).on('error', e => console.log(`error messsage: ${e.message}`)) } initCore() { // 初始化 阿里云Core this.client = new Core({ accessKeyId: this.accessKeyId, accessKeySecret: this.accessKeySecret, endpoint: 'https://alidns.aliyuncs.com', apiVersion: '2015-01-09' }); } getDomainNameID() { if(!this.client) { console.error('client no init') return false } var params = { "RegionId": "cn-hangzhou", "DomainName": this.domainName, "KeyWord": this.KeyWord, } var requestOption = { method: 'POST' }; this.client.request('DescribeDomainRecords', params, requestOption).then((res) => { console.log(JSON.stringify(res)); if(res.DomainRecords.Record) { let recordList = res.DomainRecords.Record.filter(item => { return item.Type === 'A' }) let recordID = recordList[0].RecordId this.changeDomainIP(recordID) } else { console.log('DomainRecords record is null') } }, (ex) => { console.log(ex); }) } changeDomainIP(recordID) { var params = { "RegionId": "cn-hangzhou", "RecordId": recordID, "RR": "@", "Type": "A", "Value": this.myIP } var requestOption = { method: 'POST' }; this.client.request('UpdateDomainRecord', params, requestOption).then((result) => { // console.log(JSON.stringify(result)); console.log('修改成功,公网IP为', this.myIP) }, (ex) => { console.log(ex); }) } } const aliDDns = new AliDDNS() // 每五分钟更新一次ip schedule.scheduleJob('0 5 * * * *', ()=>{ aliDDns.init() }) 

原文链接:https://www.jianshu.com/p/528c611f96bd

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