private async Task <VisionDomainRequest> MergeProperties(VisionDomainRequest operation, IVisionBinding config, VisionDomainAttribute attr)
{
//Attributes do not allow for enum types so we have to validate
//the string passed into the attribute to ensure it matches
//a valid VisionDomainOption.
VisionDomainOptions attrDomain = VisionDomainOptions.None;
if (!string.IsNullOrEmpty(attr.Domain))
{
var valid = Enum.TryParse <VisionDomainOptions>(attr.Domain, out attrDomain);
if (!valid)
{
var message = string.Format(VisionExceptionMessages.InvalidDomainName, attr.Domain);
_log.LogWarning(message);
throw new ArgumentException(message);
}
}
else
{
if (operation.Domain == VisionDomainOptions.None)
{
var message = string.Format(VisionExceptionMessages.InvalidDomainName, "None");
_log.LogWarning(message);
throw new ArgumentException(message);
}
}
var visionOperation = new VisionDomainRequest
{
Url = attr.VisionUrl ?? operation.Url,
Key = attr.VisionKey ?? operation.Key,
SecureKey = attr.SecureKey ?? attr.SecureKey,
AutoResize = attr.AutoResize,
Domain = attrDomain == VisionDomainOptions.None ? operation.Domain : attrDomain,
ImageUrl = string.IsNullOrEmpty(operation.ImageUrl) ? attr.ImageUrl : operation.ImageUrl,
ImageBytes = operation.ImageBytes,
};
if (string.IsNullOrEmpty(visionOperation.Key) && string.IsNullOrEmpty(visionOperation.SecureKey))
{
_log.LogWarning(VisionExceptionMessages.KeyMissing);
throw new ArgumentException(VisionExceptionMessages.KeyMissing);
}
if (!string.IsNullOrEmpty(visionOperation.SecureKey))
{
HttpClient httpClient = this._config.Client.GetHttpClientInstance();
visionOperation.Key = await KeyVaultServices.GetValue(visionOperation.SecureKey, httpClient);
}
return(visionOperation);
}
private async Task <T> AnalyzeAsync <T>(VisionDomainRequest request)
{
Stopwatch imageResizeSW = null;
var visionOperation = await MergeProperties(request, this._config, this._attr);
if (request.IsUrlImageSource == false)
{
if (visionOperation.ImageBytes == null || visionOperation.ImageBytes.Length == 0)
{
_log.LogWarning(VisionExceptionMessages.FileMissing);
throw new ArgumentException(VisionExceptionMessages.FileMissing);
}
if (ImageResizeService.IsImage(visionOperation.ImageBytes) == false)
{
_log.LogWarning(VisionExceptionMessages.InvalidFileType);
throw new ArgumentException(VisionExceptionMessages.InvalidFileType);
}
if (visionOperation.Oversized == true && visionOperation.AutoResize == false)
{
var message = string.Format(VisionExceptionMessages.FileTooLarge,
VisionConfiguration.MaximumFileSize, visionOperation.ImageBytes.Length);
_log.LogWarning(message);
throw new ArgumentException(message);
}
else if (visionOperation.Oversized == true && visionOperation.AutoResize == true)
{
_log.LogTrace("Resizing Image");
imageResizeSW = new Stopwatch();
imageResizeSW.Start();
visionOperation.ImageBytes = ImageResizeService.ResizeImage(visionOperation.ImageBytes);
imageResizeSW.Stop();
_log.LogMetric("VisionAnalysisImageResizeDurationMillisecond", imageResizeSW.ElapsedMilliseconds);
if (visionOperation.Oversized)
{
var message = string.Format(VisionExceptionMessages.FileTooLargeAfterResize,
VisionConfiguration.MaximumFileSize, visionOperation.ImageBytes.Length);
_log.LogWarning(message);
throw new ArgumentException(message);
}
}
}
var result = await SubmitRequest <T>(visionOperation);
return(result);
}
private string GetVisionOperationParameters(VisionDomainRequest request)
{
string optionsParam = string.Empty;
switch (request.Domain)
{
case VisionDomainOptions.Celebrity:
optionsParam = "models/celebrities/analyze";
break;
case VisionDomainOptions.Landmark:
optionsParam = "models/landmarks/analyze ";
break;
}
return(optionsParam);
}
private VisionDomainRequest BuildRequest(VisionDomainAttribute attribute)
{
VisionDomainRequest request = new VisionDomainRequest();
if (attribute.ImageSource == ImageSource.BlobStorage)
{
var fileTask = StorageServices.GetFileBytes(attribute.BlobStoragePath, attribute.BlobStorageAccount);
fileTask.Wait();
request.ImageBytes = fileTask.Result;
}
else
{
request.ImageUrl = attribute.ImageUrl;
}
return(request);
}
private async Task <T> SubmitRequest <T>(VisionDomainRequest request)
{
Stopwatch sw = new Stopwatch();
string requestParameters = GetVisionOperationParameters(request);
string uri = $"{request.Url}/{requestParameters}";
ServiceResultModel requestResult = null;
if (request.IsUrlImageSource)
{
_log.LogTrace($"Submitting Vision Domain Request");
var urlRequest = new VisionUrlRequest {
Url = request.ImageUrl
};
var requestContent = JsonConvert.SerializeObject(urlRequest);
var content = new StringContent(requestContent);
sw.Start();
requestResult = await this._config.Client.PostAsync(uri, request.Key, content, ReturnType.String);
sw.Stop();
_log.LogMetric("VisionDomainRequestDurationMillisecond", sw.ElapsedMilliseconds);
}
else
{
using (ByteArrayContent content = new ByteArrayContent(request.ImageBytes))
{
requestResult = await this._config.Client.PostAsync(uri, request.Key, content, ReturnType.String);
}
}
if (requestResult.HttpStatusCode == (int)System.Net.HttpStatusCode.OK)
{
_log.LogTrace($"Analysis Request Results: {requestResult.Contents}");
var result = JsonConvert.DeserializeObject <T>(requestResult.Contents);
return(result);
}
else if (requestResult.HttpStatusCode == (int)System.Net.HttpStatusCode.BadRequest)
{
VisionErrorModel error = JsonConvert.DeserializeObject <VisionErrorModel>(requestResult.Contents);
var message = string.Format(VisionExceptionMessages.CognitiveServicesException, error.Code, error.Message);
_log.LogWarning(message);
throw new Exception(message);
}
else
{
var message = string.Format(VisionExceptionMessages.CognitiveServicesException, requestResult.HttpStatusCode, requestResult.Contents);
_log.LogError(message);
throw new Exception(message);
}
}
public async Task <VisionDomainLandmarkModel> AnalyzeLandmarkAsync(VisionDomainRequest request)
{
var result = await AnalyzeAsync <VisionDomainLandmarkModel>(request);
return(result);
}
public async Task <VisionDomainCelebrityModel> AnalyzeCelebrityAsync(VisionDomainRequest request)
{
var result = await AnalyzeAsync <VisionDomainCelebrityModel>(request);
return(result);
}