/**
 * Small in-memory SSR response cache.
 *
 * @module bquery/ssr
 */
export interface SSRCacheEntry {
    body: string;
    createdAt: number;
    headers: Array<[string, string]>;
    status: number;
}
export interface SSRCacheRequest {
    headers: Headers;
    url: URL;
    vary?: string[];
}
export interface SSRCacheOptions {
    /** Maximum number of cached entries. Default: 100. */
    maxEntries?: number;
    /** Maximum age in milliseconds. Default: 60_000. */
    ttlMs?: number;
    /** Custom cache-key builder. */
    getKey?: (request: SSRCacheRequest) => string;
}
export interface SSRCache {
    clear(): void;
    delete(key: string): void;
    get(key: string): SSRCacheEntry | null;
    getKey(request: SSRCacheRequest): string;
    set(key: string, entry: SSRCacheEntry): void;
}
export declare const createSSRCache: (options?: SSRCacheOptions) => SSRCache;
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