async Task IAuthenticationProvider.AuthenticateRequestAsync(HttpRequestMessage request)
{
// look in the IBotDataBag for the token
string objectIdentifier;
string tenantID = null;
byte[] tokenBlob = null;
bool found
= bag.TryGetValue(Keys.ObjectID, out objectIdentifier)
&& bag.TryGetValue(Keys.TenantID, out tenantID)
&& bag.TryGetValue(Keys.TokenCache, out tokenBlob);
// if not found, then throw the exception that will restart the login flow
if (! found)
{
throw new AdalSilentTokenAcquisitionException();
}
// deserialize the TokenCache and try to refresh the token silently
var tokenCache = new TokenCache(tokenBlob);
var token = await AcquireTokenSilentAsync(this.keys.ClientID, this.keys.ClientSecret, objectIdentifier, tenantID, tokenCache);
// update the IBotDataBag with the new token if it's changed
tokenBlob = tokenCache.Serialize();
bag.SetValue(Keys.TokenCache, tokenBlob);
// add the access token to the authentication header for the Microsoft Graph request
var accessToken = token.AccessToken;
request.Headers.Authorization = new AuthenticationHeaderValue("bearer", accessToken);
}
public void ClearCache()
{
string cache_filename = GetTokenCachePath();
if (System.IO.File.Exists(cache_filename))
{
var bytes = System.IO.File.ReadAllBytes(cache_filename);
var token_cache = new MSAD.TokenCache(bytes);
token_cache.Clear();
System.IO.File.WriteAllBytes(cache_filename, token_cache.Serialize());
}
}
public void ClearCache()
{
string cache_filename = GetTokenCachePath();
if (System.IO.File.Exists(cache_filename))
{
var bytes = System.IO.File.ReadAllBytes(cache_filename);
var token_cache = new Microsoft.IdentityModel.Clients.ActiveDirectory.TokenCache(bytes);
token_cache.Clear();
System.IO.File.WriteAllBytes(cache_filename, token_cache.Serialize());
}
}
private static void SaveTokenCache(MSAD.TokenCache token_cache, string filename)
{
var bytes = token_cache.Serialize();
System.IO.File.WriteAllBytes(filename, bytes);
}
