feat: 处理端口跳跃(感谢亚托莉佬)

backend/src/core/proxy-utils/index.js

@@ -8,6 +8,7 @@ import {
     isValidPortNumber,
     isNotBlank,
     ipAddress,
+    getRandomPort,
 } from '@/utils';
 import PROXY_PROCESSORS, { ApplyProcessor } from './processors';
 import PROXY_PREPROCESSORS from './preprocessors';
@@ -220,6 +221,17 @@ function produce(proxies, targetPlatform, type, opts = {}) {
                 delete proxy['tls-fingerprint'];
             }
         }
+
+        // 处理 端口跳跃
+        if (proxy.ports) {
+            if (!['ClashMeta'].includes(targetPlatform)) {
+                proxy.ports = proxy.ports.replace(/\//g, ',');
+            }
+            if (!proxy.port) {
+                proxy.port = getRandomPort(proxy.ports);
+            }
+        }
+
         return proxy;
     });
 
@@ -274,6 +286,7 @@ export const ProxyUtils = {
     process: processFn,
     produce,
     ipAddress,
+    getRandomPort,
     isIPv4,
     isIPv6,
     isIP,

backend/src/utils/index.js

@@ -94,6 +94,23 @@ function getPolicyDescriptor(str) {
 //               };
 //           })();
 
+function getRandomInt(min, max) {
+    min = Math.ceil(min);
+    max = Math.floor(max);
+    return Math.floor(Math.random() * (max - min + 1)) + min;
+}
+
+function getRandomPort(portString) {
+    let portParts = portString.split(/,|\//);
+    let randomPart = portParts[Math.floor(Math.random() * portParts.length)];
+    if (randomPart.includes('-')) {
+        let [min, max] = randomPart.split('-').map(Number);
+        return getRandomInt(min, max);
+    } else {
+        return Number(randomPart);
+    }
+}
+
 export {
     ipAddress,
     isIPv4,
@@ -105,4 +122,5 @@ export {
     getIfPresent,
     // utf8ArrayToStr,
     getPolicyDescriptor,
+    getRandomPort,
 };