First of all thanks for overwhelming response to my earlier blog post related to upload of large files to azure block blob in parallel and async . At the bottom of this post you will find the link for downloading the code sample. In current post I will extend the same code library to support REST Api to perform azure blob upload. Also, as a best practice you should always use SAS (Shared Access Signature) for performing any operation on blob storage. Therefore in current post I will extend the code to support SAS as well. Why we need to renew or extend Azure SAS – Using SAS with blob storage is great option to provide one more level of security to azure storage operations however, anyone who gets access to SAS url can perform malicious operations. Therefore keeping SAS expiry time to minimum is always a good practice. But again, if we are performing upload of fairly large files then keeping SAS expiry to minimum will not help. For example, let’s consider a scenario. Let’s ...