initial commit

fluxer_api/src/gateway/GatewayController.ts

@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2026 Fluxer Contributors
+ *
+ * This file is part of Fluxer.
+ *
+ * Fluxer is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Fluxer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import type {HonoApp} from '~/App';
+import {Config} from '~/Config';
+import {FluxerAPIError} from '~/Errors';
+import {RateLimitMiddleware} from '~/middleware/RateLimitMiddleware';
+import {RateLimitConfigs} from '~/RateLimitConfig';
+
+function parseTokenType(raw: string): 'user' | 'bot' | 'unknown' {
+	if (raw.startsWith('flx_')) return 'user';
+	const dotIndex = raw.indexOf('.');
+	if (dotIndex > 0 && dotIndex < raw.length - 1) {
+		const beforeDot = raw.slice(0, dotIndex);
+		if (/^\d+$/.test(beforeDot)) return 'bot';
+	}
+	return 'unknown';
+}
+
+function extractToken(authHeader: string | null): string {
+	if (!authHeader) return '';
+	const lower = authHeader.toLowerCase();
+	if (lower.startsWith('bot ')) return authHeader.slice(4).trim();
+	if (lower.startsWith('bearer ')) return authHeader.slice(7).trim();
+	return authHeader.trim();
+}
+
+export const GatewayController = (app: HonoApp) => {
+	app.get('/gateway/bot', RateLimitMiddleware(RateLimitConfigs.GATEWAY_BOT_INFO), async (ctx) => {
+		const token = extractToken(ctx.req.header('Authorization') || null);
+
+		if (!token) {
+			throw new FluxerAPIError({
+				code: 'MISSING_AUTHORIZATION',
+				message: 'Bot token required',
+				status: 401,
+			});
+		}
+
+		if (parseTokenType(token) !== 'bot') {
+			throw new FluxerAPIError({
+				code: 'INVALID_AUTH_TOKEN',
+				message: 'Gateway bot endpoint only accepts bot tokens',
+				status: 401,
+			});
+		}
+
+		await ctx.get('botAuthService').validateBotToken(token);
+
+		return ctx.json({
+			url: Config.endpoints.gateway,
+			shards: 1,
+			session_start_limit: {
+				total: 1000,
+				remaining: 999,
+				reset_after: 14400000,
+				max_concurrency: 1,
+			},
+		});
+	});
+};