get method
Get cached content for a URL
Implementation
Future<String?> get(String url) async {
await _cleanExpiredEntries();
final key = _generateKey(url);
final entry = _memoryCache[key];
if (entry != null && entry.isValid) {
return entry.content;
}
if (entry != null && entry.isExpired) {
_memoryCache.remove(key);
}
return null;
}