feat: add hy2 validator

fe-app-podkop/src/validators/validateHysteriaUrl.ts

@@ -0,0 +1,115 @@
+import { ValidationResult } from './types';
+import { parseQueryString } from '../helpers/parseQueryString';
+
+export function validateHysteria2Url(url: string): ValidationResult {
+  try {
+    const isHY2 = url.startsWith('hysteria2://');
+    const isHY2Short = url.startsWith('hy2://');
+
+    if (!isHY2 && !isHY2Short) {
+      return {
+        valid: false,
+        message: _('Invalid HY2 URL: must start with hysteria2:// or hy2://'),
+      };
+    }
+
+    if (/\s/.test(url)) {
+      return {
+        valid: false,
+        message: _('Invalid HY2 URL: must not contain spaces'),
+      };
+    }
+
+    const prefix = isHY2 ? 'hysteria2://' : 'hy2://';
+    const body = url.slice(prefix.length);
+
+    const [mainPart] = body.split('#');
+    const [authHostPort, queryString] = mainPart.split('?');
+
+    if (!authHostPort)
+      return {
+        valid: false,
+        message: _('Invalid HY2 URL: missing credentials/server'),
+      };
+
+    const [passwordPart, hostPortPart] = authHostPort.split('@');
+
+    if (!passwordPart)
+      return { valid: false, message: _('Invalid HY2 URL: missing password') };
+
+    if (!hostPortPart)
+      return {
+        valid: false,
+        message: _('Invalid HY2 URL: missing host & port'),
+      };
+
+    const [host, port] = hostPortPart.split(':');
+
+    if (!host) {
+      return { valid: false, message: _('Invalid HY2 URL: missing host') };
+    }
+
+    if (!port) {
+      return { valid: false, message: _('Invalid HY2 URL: missing port') };
+    }
+
+    const cleanedPort = port.replace('/', '');
+    const portNum = Number(cleanedPort);
+
+    if (!Number.isInteger(portNum) || portNum < 1 || portNum > 65535) {
+      return {
+        valid: false,
+        message: _('Invalid HY2 URL: invalid port number'),
+      };
+    }
+
+    if (queryString) {
+      const params = parseQueryString(queryString);
+      const paramsKeys = Object.keys(params);
+
+      if (
+        paramsKeys.includes('insecure') &&
+        !['0', '1'].includes(params.insecure)
+      ) {
+        return {
+          valid: false,
+          message: _('Invalid HY2 URL: insecure must be 0 or 1'),
+        };
+      }
+
+      const validObfsTypes = ['none', 'salamander'];
+
+      if (
+        paramsKeys.includes('obfs') &&
+        !validObfsTypes.includes(params.obfs)
+      ) {
+        return {
+          valid: false,
+          message: _('Invalid HY2 URL: unsupported obfs type'),
+        };
+      }
+
+      if (
+        paramsKeys.includes('obfs') &&
+        params.obfs !== 'none' &&
+        !params['obfs-password']
+      ) {
+        return {
+          valid: false,
+          message: 'Invalid HY2 URL: obfs-password required when obfs is set',
+        };
+      }
+
+      if (paramsKeys.includes('sni') && !params.sni) {
+        return {
+          valid: false,
+          message: 'Invalid HY2 URL: sni cannot be empty',
+        };
+      }
+    }
+
+    return { valid: true, message: _('Valid') };
+  } catch (_e) {
+    return { valid: false, message: _('Invalid HY2 URL: parsing failed') };
+  }
+}