initial commit

fluxer_app/src/utils/ApiProxyUtils.ts

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+/*
+ * 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/>.
+ */
+
+const DEFAULT_FLUXER_HOSTS = new Set([
+	'api.fluxer.app',
+	'api.canary.fluxer.app',
+	'fluxer.app',
+	'canary.fluxer.app',
+	'web.fluxer.app',
+	'web.canary.fluxer.app',
+]);
+
+const normalizeProxyPath = (path: string): string => {
+	const trimmed = path.replace(/\/+$/, '');
+	return trimmed === '' ? '/' : trimmed;
+};
+
+export function isElectronApiProxyUrl(raw: string): boolean {
+	const base = getElectronApiProxyBaseUrl();
+	if (!base) return false;
+
+	try {
+		const parsed = new URL(raw);
+		if (parsed.origin !== base.origin) {
+			return false;
+		}
+
+		const rawPath = normalizeProxyPath(parsed.pathname);
+		const basePath = normalizeProxyPath(base.pathname);
+		return rawPath === basePath;
+	} catch {
+		return false;
+	}
+}
+
+export function isCustomInstanceUrl(url: string): boolean {
+	try {
+		const parsed = new URL(url);
+		return !DEFAULT_FLUXER_HOSTS.has(parsed.hostname);
+	} catch {
+		return false;
+	}
+}
+
+export function getElectronApiProxyBaseUrl(): URL | null {
+	if (typeof window === 'undefined') {
+		return null;
+	}
+
+	const getter = window.electron?.getApiProxyUrl;
+	if (typeof getter !== 'function') {
+		return null;
+	}
+
+	const raw = getter();
+	if (!raw) return null;
+
+	try {
+		return new URL(raw);
+	} catch {
+		return null;
+	}
+}
+
+export function wrapUrlWithElectronApiProxy(raw: string): string {
+	const base = getElectronApiProxyBaseUrl();
+	if (!base) return raw;
+	if (isElectronApiProxyUrl(raw)) return raw;
+	if (!isCustomInstanceUrl(raw)) return raw;
+
+	const proxyUrl = new URL(base.toString());
+	proxyUrl.searchParams.set('target', raw);
+	return proxyUrl.toString();
+}