Azure function blobtrigger should not trigger on subfolders

Question

I have created a blobtrigger that runs whenever i upload to my container. But since i am going to use kraken to process the image, and then reupload the processed images in a subfolder of the original image.

I am unable to figure out how to make sure that i am not going to trigger on kraken uploading images to the container..

Folder setup

Foldername
- file.jpg
- file.jpg

Kraken uploads to the folder (krakenfolder)

foldername
- file.jpg
- file.jpg
- krakenfolder
  - krakenprocessedimage.jpg
  - krakenprocessedimage.jpg

Currently my blobtrigger also triggers on subfolders.. how can check for it or stop it from doing this?

My blobtrigger as it is currently

[FunctionName("ProductBlobDispatch")]
        public static async void Run(
            [BlobTrigger("products/{name}")]
            Stream myBlob,
            string name,
            ILogger log,
            string blobTrigger,
            [Queue("scanpipe-media-dispatch")] IAsyncCollector<MediaDispatchModel> imageProcessor)
        {
            log.LogInformation($"Blob trigger on product upload, processed blob\n Name: {name}\n Size: {myBlob.Length} Bytes");

            //convert stream to model.

            var model = new ImageProcessingModel()
            {
                Url = "/"+name,
                IsProduct = true,
                IsDeleted = false,
            };

            await imageProcessor.AddAsync(model);
        }

silent · Answer 1 · 2020-03-12T11:49:26.527

2

As blob storage does not have "physical" folders, there is no way. Everything in name is part of the blob in the same flat structure. Even if the name is my/first/level/virtual/folder/text.txt

So you have to filter it out in your code or use containers as your "folder".

To add: There are limited filter capabilities but none of those do seem to apply to what you are looking for.

edited Mar 12 '20 at 11:49

answered Mar 12 '20 at 10:27

silent

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How can i filter it out ? – andrelange91 Mar 12 '20 at 10:32
for example simply check if your blob `name` only has one `/`? That would mean the blob is your top level folder. If it has more slashes it would be in a virtual subfolder – silent Mar 12 '20 at 10:41
@andrelange91 see my edit. There are limited filters but probably ot enough for you – silent Mar 12 '20 at 11:49

score 0 · Answer 2 · answered Mar 12 '20 at 14:06

0

I do not know it if is the best way of doing it, but it works for me.

I check on '/' with

name.Count(x => x == '/') > 1

answered Mar 12 '20 at 14:06

andrelange91

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Azure function blobtrigger should not trigger on subfolders

2 Answers2