In the past days I uploaded a lot of files to an Azure Blob Storage using the Azure Storage Explorer.
Unfortunately, I forgot to specify system properties such as cache content when uploading to Azure Storage Explorer. Currently the only option here is the Azure CLI and the “upload-batch” command. The files were already uploaded in the meantime, so I didn’t want to do the upload again.
Unfortunately, there is currently no command in the Azure Storage Explorer and the Azure CLI to update system properties such as cache content with a one-liner.
So I wrote myself a PowerShell script that reads all the blob storage items, filters for file extensions and updates the cache content.
1# Storage Settings
2$storageAccount = "__storage account__";
3$containerName = "__container name__";
4
5# Blob Update Settings
6$contentCacheControl = "public, max-age=2592000"; # 30 days
7$extensions = @(".gif", ".jpg", ".jpeg", ".ico", ".png", ".css", ".js");
8
9# Read all blobs
10$blobs = az storage blob list --account-name $storageAccount --container-name $containerName --num-results * --output json | ConvertFrom-Json
11
12# iterate all blobs
13foreach($blob in $blobs)
14{
15 # use name as identifier
16 $blobName = $blob.name;
17
18 # get extension
19 $extension = [System.IO.Path]::GetExtension($blobName).ToLower();
20
21 # update blob if extension is affected
22 if($extensions.Contains($extension))
23 {
24 az storage blob update --account-name $storageAccount --container-name $containerName --name $blobName --content-cache-control $contentCacheControl
25 Write-Host "Updated $blobName"
26 }
27}
Azure CLI - Upload Batch
During my research I also found the upload-batch command, with which I could have specified this directly during the upload.
1az storage blob upload-batch --account-name $storageAccount --destination $containerName --source C:\your\local\folder --content-cache-control "public, max-age=2592000"
Author
BEN ABT
Ben is a Principal Software Engineer at Medialesson.de, with a strong focus on .NET and Microsoft Azure. In his professional role, he designs and builds highly scalable platforms for hybrid and cloud-based scenarios. He also advises companies and C-levels on migrating to the sovereign cloud.
He runs myCSharp.de, the largest and most active German-speaking C# community forum, actively contributes to both his own and external open-source projects, and regularly shares his knowledge through his blog, at community events, conferences, and as a writer for technical magazines.
Comments