private async Task <string> AuthenticateAsync(AppSettings.Subscription subscription)
{
var httpClient = _httpClientFactory.CreateClient();
var request = new DiscoveryDocumentRequest()
{
Address = subscription.IdentityServerUrl.ToString(),
};
request.Policy.RequireHttps = false;
request.Policy.ValidateIssuerName = false;
var disco = await httpClient.GetDiscoveryDocumentAsync(request);
if (disco.IsError)
{
throw new Exception(disco.Error);
}
// request token
var tokenResponse = await httpClient.RequestClientCredentialsTokenAsync(new ClientCredentialsTokenRequest
{
Address = disco.TokenEndpoint,
ClientId = subscription.Client.Id,
ClientSecret = subscription.Client.Secret,
Scope = "api"
});
if (tokenResponse.IsError)
{
throw new Exception(tokenResponse.Error);
}
return(tokenResponse.AccessToken);
}
public async Task <HttpClient> AuthenticateClient(HttpClient httpClient, AppSettings.Subscription subscription)
{
var accessToken = await AuthenticateAsync(subscription);
var authValue = new AuthenticationHeaderValue("Bearer", accessToken);
httpClient.DefaultRequestHeaders.Authorization = authValue;
httpClient.BaseAddress = subscription.ApiUrl;
return(httpClient);
}
public async Task Authenticate(AppSettings.Subscription subscription)
{
await _authenticationProvider.AuthenticateClient(_httpClient, subscription);
}
public Task <HttpClient> AuthenticateClient(HttpClient httpClient, AppSettings.Subscription subscription) => Task.FromResult(httpClient);
public AppSettingsBuilder WithSubscription(AppSettings.Subscription subscription)
{
_settings.Subscriptions.Add(subscription);
return(this);
}
