private async Task AddToken(StoredToken token)
{
var storedTokens = await _storage.TryGetValueAsync <List <StoredToken> >(CACHE_KEY);
if (storedTokens == null)
{
storedTokens = new List <StoredToken>();
}
storedTokens.Add(token);
await _storage.SetAsync(CACHE_KEY, storedTokens);
}
public async Task <GrantedTokenResponse> GetToken(string url, string clientId, string clientSecret, IEnumerable <string> scopes)
{
if (string.IsNullOrWhiteSpace(url))
{
throw new ArgumentNullException(nameof(url));
}
if (string.IsNullOrWhiteSpace(clientId))
{
throw new ArgumentNullException(nameof(clientId));
}
if (string.IsNullOrWhiteSpace(clientSecret))
{
throw new ArgumentNullException(nameof(clientId));
}
if (scopes == null)
{
throw new ArgumentNullException(nameof(scopes));
}
var token = await GetToken(url, scopes).ConfigureAwait(false);
if (token != null)
{
if (DateTime.UtcNow < token.ExpirationDateTime)
{
return(token.GrantedToken);
}
await RemoveToken(token).ConfigureAwait(false);
}
var grantedToken = await _identityServerClientFactory.CreateAuthSelector()
.UseClientSecretPostAuth(clientId, clientSecret)
.UseClientCredentials(scopes.ToArray())
.ResolveAsync(url)
.ConfigureAwait(false);
var storedToken = new StoredToken
{
GrantedToken = grantedToken.Content,
ExpirationDateTime = DateTime.UtcNow.AddSeconds(grantedToken.Content.ExpiresIn),
Scopes = scopes,
Url = url
};
await AddToken(storedToken).ConfigureAwait(false);
return(grantedToken.Content);
}
private async Task RemoveToken(StoredToken token)
{
var storedTokens = await _storage.TryGetValueAsync <List <StoredToken> >(CACHE_KEY);
if (storedTokens == null)
{
return;
}
var st = storedTokens.FirstOrDefault(t => t.GrantedToken.AccessToken == token.GrantedToken.AccessToken);
if (st == null)
{
return;
}
storedTokens.Remove(st);
await _storage.SetAsync(CACHE_KEY, storedTokens);
}