public Task Speak(CancellationToken cancellationToken, InputOptions inputOptions, string filepath)
{
client.DefaultRequestHeaders.Clear();
foreach (var header in inputOptions.Headers)
{
client.DefaultRequestHeaders.TryAddWithoutValidation(header.Key, header.Value);
}
var genderValue = "";
switch (inputOptions.VoiceType)
{
case Gender.Male:
genderValue = "Male";
break;
case Gender.Female:
default:
genderValue = "Female";
break;
}
Tuple <Task <HttpResponseMessage>, HttpRequestMessage> tuple = SendAsyncHttpRequest(inputOptions, genderValue, cancellationToken);
var httpTask = tuple.Item1;
var request = tuple.Item2;
try
{
var result = httpTask.Result;
}
catch
{
return(Task.FromResult(false));
}
for (int i = 0; i < 3 && !httpTask.Result.IsSuccessStatusCode; i++)
{
MessageBox.Show("Too many requests, please wait for 20 seconds.");
Thread.Sleep(20000);
tuple = SendAsyncHttpRequest(inputOptions, genderValue, cancellationToken);
httpTask = tuple.Item1;
request = tuple.Item2;
try
{
var result = httpTask.Result;
}
catch
{
return(Task.FromResult(false));
}
}
var saveTask = httpTask.ContinueWith(
async(responseMessage, token) =>
{
try
{
if (responseMessage.IsCompleted && responseMessage.Result != null && responseMessage.Result.IsSuccessStatusCode)
{
var httpStream = await responseMessage.Result.Content.ReadAsStreamAsync().ConfigureAwait(false);
this.AudioAvailable(new GenericEventArgs <Stream>(httpStream, filepath));
}
else
{
this.Error(new GenericEventArgs <Exception>(new Exception(String.Format("Service returned {0}", responseMessage.Result.StatusCode))));
}
}
catch (Exception e)
{
this.Error(new GenericEventArgs <Exception>(e.GetBaseException()));
}
finally
{
responseMessage.Dispose();
request.Dispose();
}
},
TaskContinuationOptions.AttachedToParent,
cancellationToken);
return(saveTask);
}
private Tuple <Task <HttpResponseMessage>, HttpRequestMessage> SendAsyncHttpRequest(InputOptions inputOptions, string genderValue, CancellationToken cancellationToken)
{
var request = new HttpRequestMessage(HttpMethod.Post, inputOptions.RequestUri)
{
Content = new StringContent(GenerateSsml(inputOptions.Locale, genderValue, inputOptions.VoiceName, inputOptions.Text))
};
var httpTask = client.SendAsync(request, HttpCompletionOption.ResponseHeadersRead, cancellationToken);
return(Tuple.Create(httpTask, request));
}