Blob Storage trigger is not getting fired upon uploading an image to the container, why?

Question

I am new to Azure and tried my hands on azure blob storage trigger function.

I have created a function:

public static void Run(Stream myBlob, string name, Stream outputBlob, ILogger log)
{    log.LogInformation($"C# Blob trigger function Processed blob\n Name:{name} \n Size: {myBlob.Length} Bytes");
}

function.json file:

{
  "bindings": [
    {
      "name": "myBlob",
      "type": "blobTrigger",
      "direction": "in",
      "path": "hunaincontainer/{blobname}.{blobextension}.",
      "connection": "hunainfunctionstorage1_STORAGE"
    }, 
    {
      "type": "blob",
      "name": "outputBlob",
      "path": "hunaincontainer/{blobname}-ResizedImage.{blobextension}",
      "connection": "hunainfunctionstorage1_STORAGE",
      "direction": "out"
    }
  ],
  "disabled": false
}

hunaincontainer is a blob storage container in general purpose storage account. I am using free Azure for testing.

I run the function and it compiles successfully and then I upload an image to hunaincontainer using portal but it doesn't hit the function. Why? The connectionstring, key value and everything is set.

As Marie said, clear the dot in the path and wait several minutes and it will work well. Maybe it has some delay. I test in my site with your code and it works. — Joey Cai

Marie Hoeger Marie Hoeger · Accepted Answer · 2018-11-01T23:37:14

I think your issue is a stray period in the path you're setting! Instead of "path": "hunaincontainer/{blobname}.{blobextension}.", try "path": "hunaincontainer/{blobname}.{blobextension}"

Blob Storage trigger is not getting fired upon uploading an image to the container, why?

1 Answers