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Merge pull request jason5ng32#157 from jason5ng32/dev
Add DNS Resolver
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| // api/dnsresolver.js | ||
| import { Resolver } from 'dns'; | ||
| import { promisify } from 'util'; | ||
|
|
||
| // 普通 DNS 服务器列表 | ||
| const dnsServers = { | ||
| 'Google': '8.8.8.8', | ||
| 'Cloudflare': '1.1.1.1', | ||
| 'OpenDNS': '208.67.222.222', | ||
| 'Quad9': '9.9.9.9', | ||
| 'ControlD': '76.76.2.0', | ||
| 'AdGuard': '94.140.14.14', | ||
| 'Quad 101': '101.101.101.101', | ||
| 'AliDNS': '223.5.5.5', | ||
| 'DNSPod': '119.29.29.29', | ||
| '114DNS': '114.114.114.114', | ||
| 'China Unicom': '123.123.123.123', | ||
| }; | ||
|
|
||
| // DNS-over-HTTPS 服务列表 | ||
| const dohServers = { | ||
| 'Google': 'https://dns.google/resolve?', | ||
| 'Cloudflare': 'https://cloudflare-dns.com/dns-query?ct=application/dns-json&', | ||
| 'AliDNS': 'https://dns.alidns.com/resolve?', | ||
| }; | ||
|
|
||
| const resolveDns = async (hostname, name, server) => { | ||
| const resolver = new Resolver(); | ||
| resolver.setServers([server]); | ||
| const resolve4Async = promisify(resolver.resolve4.bind(resolver)); | ||
| try { | ||
| const addresses = await resolve4Async(hostname); | ||
| return { [name]: addresses }; | ||
| } catch (error) { | ||
| console.log(error.message); | ||
| return { [name]: `Error: No addresses found` }; | ||
| } | ||
| }; | ||
|
|
||
| const resolveDoh = async (hostname, name, url) => { | ||
| try { | ||
| const response = await fetch(`${url}name=${hostname}&type=A`, { | ||
| headers: { 'Accept': 'application/dns-json' } | ||
| }); | ||
| const data = await response.json(); | ||
| const addresses = data.Answer ? data.Answer.map(answer => answer.data) : ['Error: No addresses found']; | ||
| return { [name]: addresses }; | ||
| } catch (error) { | ||
| console.log(error.message); | ||
| return { [name]: `Error: No addresses found` }; | ||
| } | ||
| }; | ||
|
|
||
| const dnsResolver = async (req, res) => { | ||
|
|
||
| // 限制请求方法 | ||
| if (req.method !== 'GET') { | ||
| return res.status(405).json({ message: 'Method Not Allowed' }); | ||
| } | ||
|
|
||
| // 限制只能从指定域名访问 | ||
| const allowedDomains = ['localhost', ...(process.env.ALLOWED_DOMAINS || '').split(',')]; | ||
| const referer = req.headers.referer; | ||
| if (referer) { | ||
| const domain = new URL(referer).hostname; | ||
| if (!allowedDomains.includes(domain)) { | ||
| return res.status(403).json({ error: 'Access denied' }); | ||
| } | ||
| } else { | ||
| return res.status(403).json({ error: 'What are you doing?' }); | ||
| } | ||
|
|
||
| const { hostname } = req.query; | ||
|
|
||
| if (!hostname) { | ||
| return res.status(400).send({ error: 'Missing hostname parameter' }); | ||
| } | ||
|
|
||
| const dnsPromises = Object.entries(dnsServers).map(([name, ip]) => resolveDns(hostname, name, ip)); | ||
| const dohPromises = Object.entries(dohServers).map(([name, url]) => resolveDoh(hostname, name, url)); | ||
|
|
||
| try { | ||
| // 并行执行所有 DNS 和 DoH 查询 | ||
|
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||
| const result_dns = await Promise.all(dnsPromises); | ||
| const result_doh = await Promise.all(dohPromises); | ||
|
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||
| res.json({ | ||
| hostname, | ||
| result_dns, | ||
| result_doh | ||
| }); | ||
| } catch (error) { | ||
| res.status(500).send({ error: error.message }); | ||
| } | ||
| }; | ||
|
|
||
| export default dnsResolver; |
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