feat: 域名解析支持自定义 DoH(需新版前端)

2026-04-07 00:43:18 +08:00 · 2024-06-20 21:42:15 +08:00
parent a5d77c39c8
commit 32dcca4a26
7 changed files with 161 additions and 52 deletions
--- a/backend/src/utils/dns.js
+++ b/backend/src/utils/dns.js
@@ -0,0 +1,55 @@
+import $ from '@/core/app';
+import dnsPacket from 'dns-packet';
+import { Buffer } from 'buffer';
+
+export async function doh({
+    url,
+    domain,
+    type = 'A',
+    timeout,
+    ip = '223.6.6.6',
+}) {
+    const buf = dnsPacket.encode({
+        type: 'query',
+        id: 0,
+        flags: dnsPacket.RECURSION_DESIRED,
+        questions: [
+            {
+                type,
+                name: domain,
+            },
+        ],
+        additionals: [
+            {
+                type: 'OPT',
+                name: '.',
+                udpPayloadSize: 4096,
+                flags: 0,
+                options: [
+                    {
+                        code: 'CLIENT_SUBNET',
+                        ip,
+                        sourcePrefixLength: 24,
+                        scopePrefixLength: 0,
+                    },
+                ],
+            },
+        ],
+    });
+    const res = await $.http.get({
+        url: `${url}?dns=${buf
+            .toString('base64')
+            .toString('utf-8')
+            .replace(/=/g, '')}`,
+        headers: {
+            Accept: 'application/dns-message',
+            // 'Content-Type': 'application/dns-message',
+        },
+        // body: buf,
+        'binary-mode': true,
+        encoding: null, // 使用 null 编码以确保响应是原始二进制数据
+        timeout,
+    });
+
+    return dnsPacket.decode(Buffer.from($.env.isQX ? res.bodyBytes : res.body));
+}