Azure-sdk-for-net: FaceClient throws APIErrorException 'NotFound' in v2.0.0-preview

[brminnick]

The following code, using Microsoft.Azure.CognitiveServices.Vision.Face v2.0.0-preview, throws Microsoft.Azure.CognitiveServices.Vision.Face.Models.APIErrorException:

Operation returned an invalid status code 'NotFound'

readonly FaceClient FaceApiClient = new FaceClient(new ApiKeyServiceClientCredentials(CognitiveServicesConstants.FaceApiKey));

public static async Task<List<Emotion>> GetEmotionResults(Stream photo)
{
    var faceApiResponseList = await FaceApiClient.Face.DetectWithStreamAsync(photo, returnFaceAttributes: new List<FaceAttributeType> { { FaceAttributeType.Emotion } }).ConfigureAwait(false);
    return faceApiResponseList.Select(x => x.FaceAttributes.Emotion).ToList();
}

[brminnick]

Workaround

Update the Endpoint to use the base url containing the specific Azure Region of the Cognitive Service instance as noted in the API docs, .e.g https://[location].api.cognitive.microsoft.com/

Example

In this example, I am using the westus region for the location because that is the region in which my Cognitive Service Face API resource in Azure.

readonly FaceClient FaceApiClient = new FaceClient(new ApiKeyServiceClientCredentials(CognitiveServicesConstants.FaceApiKey))
{
    Endpoint ="https://westus.api.cognitive.microsoft.com/"
});

public static async Task<List<Emotion>> GetEmotionResults(Stream photo)
{
    var faceApiResponseList = await FaceApiClient.Face.DetectWithStreamAsync(photo, returnFaceAttributes: new List<FaceAttributeType> { { FaceAttributeType.Emotion } }).ConfigureAwait(false);
    return faceApiResponseList.Select(x => x.FaceAttributes.Emotion).ToList();
}

[brminnick]

Link to sample Xamarin app: https://github.com/brminnick/FaceOff/blob/master/Source/FaceOff/Services/EmotionService.cs#L70

[brminnick]

Adding @noellelacharite for visibility

[LukeBayler]

Please add label:"Cognitive Services". Thanks.

[brminnick]

@LukeBayler I don't have permissions to add labels

[sebasijan]

Did anyone find a solution to this?

I am getting the same error, but I definitely instantiated the FaceClient with the same endpoint specified in my MS account

[brminnick]

@sebasjian Use the Base URL of the endpoint instead of the full endpoint url.

E.g., use https://westus.api.cognitive.microsoft.com instead of of https://westus.api.cognitive.microsoft.com/face/v1.0

I opened this Issue which addresses that problem: https://github.com/Azure/azure-sdk-for-net/issues/4633

[dance2die]

@sebasjian Use the Base URL of the endpoint instead of the full endpoint url.

E.g., use https://westus.api.cognitive.microsoft.com instead of of https://westus.api.cognitive.microsoft.com/face/v1.0

I opened this Issue which addresses that problem: #4633

Thank you @brminnick
This worked wonderfully.

[jtsoftresource]

Hi all,

we faced the same issue on applying the workaround above but still fail.
https://southeastasia.api.cognitive.microsoft.com/
https://southeastasia.api.cognitive.microsoft.com/face/v1.0
https://southeastasia.api.cognitive.microsoft.com/face/v1.0/detect

於 Microsoft.Azure.CognitiveServices.Vision.Face.Models.APIErrorException 擲回例外狀況: 'mscorlib.dll'
GetAllPersonNamesAsync: Operation returned an invalid status code 'NotFound'

Please advice. Thanks.

[Ayoola]

@sebasjian Use the Base URL of the endpoint instead of the full endpoint url.

E.g., use https://westus.api.cognitive.microsoft.com instead of of https://westus.api.cognitive.microsoft.com/face/v1.0

I opened this Issue which addresses that problem: #4633

This worked for me!

[ChrisHMSFT]

Hi All,

Closing this ticket as the Azure portal now displays and endpoint consistent with the input for the SDK. Please re-open if this issue still persists

Thanks,
Chris

[sharma-pratik]

In azure portal Endpoint is given as "https://westcentralus.api.cognitive.microsoft.com/face" , hence when user use that endpoint , the sdk internal try to create endpoint according to the operation user using. For e.g. by calling method detect_with_url() , it will convert the endpoint to "https://westcentralus.api.cognitive.microsoft.com/face/v1.0/detect" which right. But the endpoint shown in portal will get converted into this "https://westcentralus.api.cognitive.microsoft.com/face/face/v1.0/detect" which lead to APIErrorException. Hence as suggested by @brminnick, just use the base url.