How to upload content using REST API to Azure Blob storage

Question

Hi,

I have a requirement to upload the large content (~10GB) to a cloud blob storage, as shown in the below picture.

Step 1: User initiate the upload function to our private micro-service, and it should return a pre-signed URL(s)

Step 2: User now uploads the content securely to Azure Blob storage directly using REST APIs.

1. What is the right Azure service/technology to adopt above design.
2. Is this design scalable using Azure service/technology.

Answer 1

Hello @Satyam Bala !

Welcome to Microsoft QnA!

1. API Management for the gateway
2. Azure Functions
3. Azure blob Storage

Azure API Management allows you to set up HTTP REST APIs for your services and can integrate with Azure services securely.

Azure Functions can integrate with Azure SDks and provide a SAS Url , pre signed with Expiration date that allows PUT only

Example of how you might generate a SAS token for a blob using the Azure Storage SDK for .NET:

csharp

CloudBlobContainer container = blobClient.GetContainerReference("mycontainer");

SharedAccessBlobPolicy sasConstraints = new SharedAccessBlobPolicy

{

SharedAccessExpiryTime = DateTimeOffset.UtcNow.AddHours(24),

Permissions = SharedAccessBlobPermissions.Read | SharedAccessBlobPermissions.Write | SharedAccessBlobPermissions.List

};

string sasContainerToken = container.GetSharedAccessSignature(sasConstraints);

string signedContainerUrl = container.Uri + sasContainerToken;

The URL is used to make Uploads into Azure Blob Storage

---

I hope this helps!

Kindly mark the answer as Accepted and Upvote in case it helped!

Regards

Answer 2

Hello @Satyam Bala !

Security can be implemented by using specific timeframes for the SAS signature , limit access to specific IP , utilize Defender for Cloud , Access Controls and so on , please read ahead :

https://learn.microsoft.com/en-us/azure/storage/common/storage-sas-overview

https://learn.microsoft.com/en-us/azure/well-architected/service-guides/storage-accounts/security

https://learn.microsoft.com/en-us/azure/storage/blobs/security-recommendations

https://learn.microsoft.com/en-us/azure/ai-services/Translator/document-translation/how-to-guides/create-sas-tokens?tabs=Containers#create-your-tokens-1

Here is the link for Azure Storage libraries for Java

https://learn.microsoft.com/en-us/java/api/overview/azure/storage?view=azure-java-stable

---

I hope this helps!

Kindly mark the answer as Accepted and Upvote in case it helped!

Regards