private async Task <string> AddTokens(string userId, TokenResponse tokens, string type)
{
var storedConfiguration = new StoredConfiguration()
{
Id = Guid.NewGuid().ToString(),
Type = type
};
FillTokens(storedConfiguration, tokens);
var user = await context.Users.Include(v => v.Configurations).FirstOrDefaultAsync(v => v.Id == userId);
if (null == user)
{
user = new User()
{
Id = userId,
Configurations = new List <StoredConfiguration>()
{
storedConfiguration
}
};
await context.Users.AddAsync(user);
}
else
{
if (null == user.Configurations)
{
user.Configurations = new List <StoredConfiguration>();
}
user.Configurations.Add(storedConfiguration);
}
await context.SaveChangesAsync();
return(storedConfiguration.Id);
}
public GraphCalendarProvider(IGraphAuthenticationProviderFactory graphAuthenticationProviderFactory,
StoredConfiguration config,
IOptions <CalendarConfigurationOptions> optionsAccessor)
{
this.graphAuthenticationProviderFactory = graphAuthenticationProviderFactory;
this.config = config;
options = optionsAccessor.Value;
}
public GoogleCalendarProvider(StoredConfiguration config, IGoogleCredentialProvider googleCredentialProvider,
IOptions <CalendarConfigurationOptions> optionsAccessor, ILogger <GoogleCalendarProvider> logger,
GoogleCalendarColorProvider googleCalendarColorProvider)
{
this.config = config;
this.googleCredentialProvider = googleCredentialProvider;
this.logger = logger;
_googleCalendarColorProvider = googleCalendarColorProvider;
options = optionsAccessor.Value;
}
public GoogleCalendarColorProvider(IMemoryCache memoryCache,
StoredConfiguration config,
IGoogleCredentialProvider googleCredentialProvider,
ILogger <GoogleCalendarColorProvider> logger)
{
_memoryCache = memoryCache;
_config = config;
_googleCredentialProvider = googleCredentialProvider;
_logger = logger;
}
private ICalendarProvider GetProvider(StoredConfiguration config)
{
switch (config.Type)
{
case CalendarType.Microsoft:
return(graphCalendarProviderFactory.GetProvider(config));
case CalendarType.Google:
return(googleCalendarProviderFactory.GetProvider(config));
default:
throw new NotImplementedException();
}
}
public async Task <IConfigurableHttpClientInitializer> CreateByConfigAsync(StoredConfiguration config)
{
var semaphore = ConfigurationRepository.ConfigSemaphores.GetOrAdd(config.Id, new SemaphoreSlim(1));
try
{
await semaphore.WaitAsync(); //if the authenticationprovider is used concurrently, only the first parallel usage shall refresh the token
if (config.ExpiresIn <= DateTime.Now)
{
var flow = new Google.Apis.Auth.OAuth2.Flows.GoogleAuthorizationCodeFlow(new Google.Apis.Auth.OAuth2.Flows.GoogleAuthorizationCodeFlow.Initializer()
{
Scopes = new[] { "https://www.googleapis.com/auth/calendar.events.readonly",
"https://www.googleapis.com/auth/calendar.readonly" },
ClientSecrets = new ClientSecrets()
{
ClientId = options.GoogleClientID,
ClientSecret = options.GoogleClientSecret
}
});
Google.Apis.Auth.OAuth2.Responses.TokenResponse tokenResponse;
try
{
tokenResponse = await flow.RefreshTokenAsync("unused", config.RefreshToken, CancellationToken.None);
}
catch (TokenResponseException e)
{
throw new CalendarConfigurationException($"Google: Could not redeem authorization code: {e.Error.ErrorDescription}", e);
}
var tokens = new TokenResponse()
{
access_token = tokenResponse.AccessToken,
expires_in = (int)tokenResponse.ExpiresInSeconds,
refresh_token = tokenResponse.RefreshToken ?? config.RefreshToken
};
config = await configurationRepository.RefreshTokens(config.Id, tokens);
}
}
finally
{
semaphore.Release();
}
return(GoogleCredential.FromAccessToken(config.AccessToken));
}
public async Task AuthenticateRequestAsync(HttpRequestMessage request)
{
var semaphore = ConfigurationRepository.ConfigSemaphores.GetOrAdd(config.Id, new SemaphoreSlim(1));
await semaphore.WaitAsync(); //if the authenticationprovider is used concurrently, only the first parallel usage shall refresh the token
try
{
if (config.ExpiresIn <= DateTime.Now)
{
var client = new HttpClient();
var dict = new Dictionary <string, string>()
{
{ "client_id", options.MSClientId },
{ "scope", "offline_access Calendars.Read" },
{ "grant_type", "refresh_token" },
{ "refresh_token", config.RefreshToken },
{ "redirect_uri", options.MSRedirectUri },
{ "client_secret", options.MSSecret }
};
var result = await client.PostAsync("https://login.microsoftonline.com/common/oauth2/v2.0/token",
new FormUrlEncodedContent(dict));
if (!result.IsSuccessStatusCode)
{
throw new CalendarConfigurationException($"Could not redeem refresh token: {result.StatusCode}");
}
var tokenResponse = await result.Content.ReadAsStringAsync();
var tokens = JsonConvert.DeserializeObject <TokenResponse>(tokenResponse);
config = await configurationRepository.RefreshTokens(config.Id, tokens);
}
}
finally
{
semaphore.Release();
}
request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", config.AccessToken);
}
private void FillTokens(StoredConfiguration config, TokenResponse tokens)
{
config.RefreshToken = tokens.refresh_token;
config.AccessToken = tokens.access_token;
config.ExpiresIn = DateTime.Now.AddSeconds(tokens.expires_in);
}
public async Task <IAuthenticationProvider> GetByConfig(StoredConfiguration config)
{
return(new GraphTokenAuthenticationProvider(configurationRepository, options, config));
}
public ICalendarProvider GetProvider(StoredConfiguration config)
{
return(new GraphCalendarProvider(graphAuthenticationProviderFactory, config, optionsAccessor));
}
public GoogleCalendarColorProvider Get(StoredConfiguration config,
IGoogleCredentialProvider googleCredentialProvider)
{
return(new GoogleCalendarColorProvider(_memoryCache,
config, googleCredentialProvider, _logger));
}
public ICalendarProvider GetProvider(StoredConfiguration config)
{
return(new GoogleCalendarProvider(config, googleCredentialProvider, options, logger,
_googleCalendarColorProviderFactory.Get(config, googleCredentialProvider)));
}
public GraphTokenAuthenticationProvider(IConfigurationRepository configurationRepository, CalendarConfigurationOptions options, StoredConfiguration config)
{
this.configurationRepository = configurationRepository;
this.options = options;
this.config = config;
}