public static async Task SetClaimsAsync(this IDistributedCache cache, OAuth2IntrospectionOptions options, string token, IEnumerable <Claim> claims, TimeSpan duration, ILogger logger)
{
var expClaim = claims.FirstOrDefault(c => c.Type == JwtClaimTypes.Expiration);
if (expClaim == null)
{
logger.LogWarning("No exp claim found on introspection response, can't cache.");
return;
}
var now = DateTimeOffset.UtcNow;
var expiration = DateTimeOffset.FromUnixTimeSeconds(long.Parse(expClaim.Value));
logger.LogDebug("Token will expire in {expiration}", expiration);
if (expiration <= now)
{
return;
}
// if the lifetime of the token is shorter than the duration, use the remaining token lifetime
DateTimeOffset absoluteLifetime;
if (expiration <= now.Add(duration))
{
absoluteLifetime = expiration;
}
else
{
absoluteLifetime = now.Add(duration);
}
var json = JsonSerializer.Serialize(claims, Options);
var bytes = Encoding.UTF8.GetBytes(json);
logger.LogDebug("Setting cache item expiration to {expiration}", absoluteLifetime);
var cacheKey = options.CacheKeyGenerator(options, token);
await cache.SetAsync(cacheKey, bytes, new DistributedCacheEntryOptions { AbsoluteExpiration = absoluteLifetime }).ConfigureAwait(false);
}
public static async Task <IEnumerable <Claim> > GetClaimsAsync(this IDistributedCache cache, OAuth2IntrospectionOptions options, string token)
{
var cacheKey = options.CacheKeyGenerator(options, token);
var bytes = await cache.GetAsync(cacheKey).ConfigureAwait(false);
if (bytes == null)
{
return(null);
}
var json = Encoding.UTF8.GetString(bytes);
return(JsonSerializer.Deserialize <IEnumerable <Claim> >(json, Options));
}
