private async Task <Guid> CreateNewScenarioAsync()
{
CloudBlobContainer formRecognizerCloudContainer = null;
try
{
ScenarioSetupState = FormRecognizerScenarioSetupState.Running;
// create cloud storage container and upload local files
formRecognizerCloudContainer = AzureBlobHelper.GetCloudBlobContainer(StorageAccount, StorageKey, Guid.NewGuid().ToString());
await AzureBlobHelper.UploadStorageFilesToContainerAsync(LocalFileCollection, formRecognizerCloudContainer);
string containerFullSASUrl = AzureBlobHelper.GetContainerSasToken(formRecognizerCloudContainer, sharedAccessStartTimeInMinutes: 5, sharedAccessExpiryTimeInMinutes: 5);
// create and train the custom model
Guid modelId = await this.formRecognizerService.TrainCustomModelAsync(containerFullSASUrl);
ModelResultResponse model = await this.formRecognizerService.GetCustomModelAsync(modelId);
// check creation status
string status = (model?.ModelInfo?.Status ?? string.Empty).ToLower();
switch (status)
{
case "created":
case "ready":
ScenarioSetupState = FormRecognizerScenarioSetupState.Completed;
return(modelId);
case "invalid":
default:
ScenarioSetupState = FormRecognizerScenarioSetupState.Error;
break;
}
}
catch (Exception ex)
{
ScenarioCreationErrorDetails = ex.Message;
ScenarioSetupState = FormRecognizerScenarioSetupState.Error;
}
finally
{
if (formRecognizerCloudContainer != null)
{
await formRecognizerCloudContainer.DeleteIfExistsAsync();
}
}
return(Guid.Empty);
}
private async Task <Guid> GetResultFromLocationResponse(HttpResponseMessage response)
{
// Process operation
if (response.Headers.Contains(this.HEADER_LOCATION_KEY) == false)
{
throw new InvalidOperationException("No location value returned from initial request.");
}
Uri locationUri = new Uri(response.Headers.GetValues(this.HEADER_LOCATION_KEY).First());
var opResult = new ModelResultResponse();
int i = 0;
while (i++ < RETRY_COUNT)
{
// Get the operation result
opResult = await HttpClientUtility.GetAsync <ModelResultResponse>(locationUri, this.RequestHeaders);
// Wait if operation is running or has not started
if (opResult.ModelInfo.Status == "creating")
{
await Task.Delay(RETRY_DELAY);
}
else
{
break;
}
}
if (opResult.ModelInfo.Status != "ready")
{
throw new Exception($"Form recognition operation was not successful with status: {opResult.ModelInfo.Status}");
}
return(opResult.ModelInfo.ModelId);
}