''

app/lib/auth-cookie.ts

@@ -0,0 +1,34 @@
+/**
+ * 认证 Cookie 配置
+ * 生产环境设置 AUTH_COOKIE_DOMAIN 实现跨子域 SSO（如 .hackrobot.cn）
+ * 本地开发不设置 domain，避免 IP 访问时 cookie 失效
+ */
+
+const COOKIE_NAME = "pb_session";
+const COOKIE_MAX_AGE = 60 * 60 * 24 * 365;
+
+export { COOKIE_NAME, COOKIE_MAX_AGE };
+
+/** 从请求 Host 头提取 hostname（不含端口） */
+export function getHostFromRequest(request: { headers: { get: (k: string) => string | null } }): string {
+  const host = request.headers.get("host") || request.headers.get("x-forwarded-host") || "";
+  return host.split(",")[0].trim().replace(/:\d+$/, "");
+}
+
+export function getCookieOptions(clear = false, requestHost?: string) {
+  const isProd = process.env.NODE_ENV === "production";
+  const domain = process.env.AUTH_COOKIE_DOMAIN?.trim();
+  const opts: Record<string, unknown> = {
+    path: "/",
+    maxAge: clear ? 0 : COOKIE_MAX_AGE,
+    secure: isProd,
+    sameSite: "lax" as const,
+    httpOnly: true,
+  };
+  if (domain && isProd) {
+    opts.domain = domain;
+  } else if (!isProd && requestHost && /^(\d{1,3}\.){3}\d{1,3}$/.test(requestHost)) {
+    opts.domain = requestHost;
+  }
+  return opts;
+}