async Task <string> FetchToken()
{
try
{
var uri = authEndpoint.ToUriBuilder(SpeechRegion).Uri;
Debug.WriteLine($"{DateTime.Now} :: Request Uri: {uri}");
var result = await client.PostAsync(uri, null);
if (result.IsSuccessStatusCode)
{
Debug.WriteLine("New authentication token retrieved at {0}", DateTime.Now);
return(await result.Content.ReadAsStringAsync());
}
throw new Exception($"Unable to authenticate, auth endpoint returned: status code {result.StatusCode} ; Reason: {result.ReasonPhrase}");
}
catch (Exception ex)
{
Debug.WriteLine("Error during auth post: {0}", ex);
throw;
}
}
HttpRequestMessage CreateRequest(OutputMode outputMode)
{
try
{
var uriBuilder = speechEndpoint.ToUriBuilder(SpeechRegion);
uriBuilder.Path += $"/{RecognitionMode.ToString ().ToLower ()}/cognitiveservices/{ApiVersion}";
uriBuilder.Query += $"language={RecognitionLanguage}&format={outputMode.ToString ().ToLower ()}&profanity={ProfanityMode.ToString ().ToLower ()}";
Debug.WriteLine($"{DateTime.Now} :: Request Uri: {uriBuilder.Uri}");
var request = new HttpRequestMessage(HttpMethod.Post, uriBuilder.Uri)
{
Version = HttpVersion.Version11
};
request.Headers.TransferEncodingChunked = true;
request.Headers.ExpectContinue = true;
request.Headers.Accept.ParseAdd(Constants.MimeTypes.Json);
request.Headers.Accept.ParseAdd(Constants.MimeTypes.Xml);
request.Headers.Host = speechEndpoint.Host;
switch (AuthenticationMode)
{
case AuthenticationMode.SubscriptionKey:
request.Headers.Add(Constants.Keys.SubscriptionKey, subscriptionKey);
break;
case AuthenticationMode.AuthorizationToken:
request.Headers.Authorization = new AuthenticationHeaderValue(Constants.Keys.Bearer, AuthClient.Token);
break;
}
return(request);
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
throw;
}
}