/// <summary>
/// Create an ImmersiveReaderResourceConfig for the resourceKey supplied, and map the key to the ImmersiveReaderResourceConfig object.
/// </summary>
private void InitializeResource(IConfiguration configuration, string resourceKey)
{
string tenantId = configuration[$"{resourceKey}:TenantId"];
string clientId = configuration[$"{resourceKey}:ClientId"];
string clientSecret = configuration[$"{resourceKey}:ClientSecret"];
string subdomain = configuration[$"{resourceKey}:Subdomain"];
if (string.IsNullOrWhiteSpace(tenantId))
{
throw new ArgumentNullException("TenantId is null! Did you add that info to secrets.json? See ReadMe.txt.");
}
if (string.IsNullOrWhiteSpace(clientId))
{
throw new ArgumentNullException("ClientId is null! Did you add that info to secrets.json? See ReadMe.txt.");
}
if (string.IsNullOrWhiteSpace(clientSecret))
{
throw new ArgumentNullException("ClientSecret is null! Did you add that info to secrets.json? See ReadMe.txt.");
}
if (string.IsNullOrWhiteSpace(subdomain))
{
throw new ArgumentNullException("Subdomain is null! Did you add that info to secrets.json? See ReadMe.txt.");
}
ResourceKeyToConfigs[resourceKey] = new ImmersiveReaderResourceConfig
{
TenantId = tenantId,
ClientId = clientId,
ClientSecret = clientSecret,
Subdomain = subdomain
};
}
/// <summary>
/// Get an Azure AD authentication token using a given resource
/// </summary>
private async Task <string> GetTokenAsync(ImmersiveReaderResourceConfig resourceConfig)
{
string authority = $"https://login.windows.net/{resourceConfig.TenantId}";
const string resource = "https://cognitiveservices.azure.com/";
AuthenticationContext authContext = new AuthenticationContext(authority);
ClientCredential clientCredential = new ClientCredential(resourceConfig.ClientId, resourceConfig.ClientSecret);
AuthenticationResult authResult = await authContext.AcquireTokenAsync(resource, clientCredential);
return(authResult.AccessToken);
}