public static async Task SaveToken(string userId, TokenSecrets tokens)
{
await _keyVaultClient.SetSecretAsync(Config.AzureKeyVaultEndpoint, TokenSecretName(userId), JsonConvert.SerializeObject(tokens));
if (_cachedTokens.ContainsKey(userId))
{
_cachedTokens[userId] = tokens;
}
else
{
_cachedTokens.Add(userId, tokens);
}
}
public static async Task <TokenSecrets> GetToken(string userId)
{
TokenSecrets tokens = null;
if (_cachedTokens.ContainsKey(userId))
{
tokens = _cachedTokens[userId];
}
else
{
var secret = await _keyVaultClient.GetSecretAsync(Config.AzureKeyVaultEndpoint, TokenSecretName(userId));
tokens = JsonConvert.DeserializeObject <TokenSecrets>(secret.Value);
_cachedTokens.Add(userId, tokens);
}
if (DateTime.UtcNow.AddMinutes(5) > tokens.ExpiresInUtc)
{
throw new TokenExpiredException(tokens.RefreshToken);
}
return(tokens);
}
private static async Task <string> GetAccessToken(string userId)
{
TokenSecrets tokens = null;
try
{
tokens = await SecretRepository.GetToken(userId);
}
catch (TokenExpiredException ex)
{
var tokenResponse = await SpotifyApi.RefreshTokenAsync(ex.RefreshToken);
tokens = new TokenSecrets
{
AccessToken = tokenResponse.access_token,
RefreshToken = tokenResponse.refresh_token ?? ex.RefreshToken,
ExpiresInUtc = DateTime.UtcNow.AddSeconds(tokenResponse.expires_in)
};
await SecretRepository.SaveToken(userId, tokens);
}
return(tokens.AccessToken);
}
