How do you capture file creation data (date, person, size, etc) for files uploaded to a data lake storage account?

Question

We have users uploading files to containers in a data lake storage account. We will have Azure Functions triggered when those files are uploaded and need to access the created date, created by, file size, etc of the file that was uploaded. Is that data stored somewhere in Azure?

Answer 1

Thanks for posting your question in the Microsoft Q&A forum.

In addition to the data payload provided by a trigger (such as the content of the queue message that triggered a function), many triggers provide additional metadata values. These values can be used as input parameters in C# and F# or properties on the context.bindings object in JavaScript.

https://learn.microsoft.com/en-us/azure/azure-functions/functions-bindings-expressions-patterns#trigger-metadata

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Answer 2

Hello @Lea Calvin These metrics that you're asking for is collected by the monitoring service which you can access and query for. Check this article which will give you the different metrics you can look at for authenticated operations to your endpoint - https://learn.microsoft.com/en-us/azure/storage/blobs/monitor-blob-storage-reference#fields-that-describe-how-the-operation-was-authenticated. With this, you can get the user who made the operation (through requester/objectId, requester/upn etc.). Similarly, some of the other metrics relating to file size etc. can be obtained from here - https://learn.microsoft.com/en-us/azure/storage/blobs/monitor-blob-storage-reference#fields-that-describe-the-service. If the answer is helpful, please click "Accept Answer" and upvote it.