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You need to construct the link to the summary report for the email that is sent to users. What should you do?
A. Create a SharedAccessBlobPolicy and add it to the containers SharedAccessPolicies. Call GetSharedAccessSignature on the blob and use the resulting link.
B. Create a SharedAccessAccountPolicy and call GetSharedAccessSignature on storage account and use the resulting link.
C. Create a SharedAccessBlobPolicy and set the expiry time to two weeks from today. Call GetSharedAccessSignature on the blob and use the resulting link.
D. Create a SharedAccessBlobPolicy and set the expiry time to two weeks from today. Call GetSharedAccessSignature on the container and use the resulting link.
Correct Answer: D
Explanation/Reference:
Explanation:
Scenario: Processing is performed by an Azure Function that uses version 2 of the Azure Function runtime. Once processing is completed, results are stored in Azure Blob Storage and an Azure SQL database. Then, an email summary is sent to the user with a link to the processing report. The link to the report must remain valid if the email is forwarded to another user.
Create a stored access policy to manage signatures on a container’s resources, and then generate the shared access signature on the container, setting the constraints directly on the signature.
Code example: Add a method that generates the shared access signature for the container and returns the signature URI. static string GetContainerSasUri(CloudBlobContainer container)
{
//Set the expiry time and permissions for the container.
//In this case no start time is specified, so the shared access signature becomes valid immediately.
SharedAccessBlobPolicy sasConstraints = new SharedAccessBlobPolicy(); sasConstraints.SharedAccessExpiryTime = DateTimeOffset.UtcNow.AddHours(24); sasConstraints.Permissions = SharedAccessBlobPermissions.List | SharedAccessBlobPermissions.Write;
//Generate the shared access signature on the container, setting the constraints directly on the signature. string sasContainerToken = container.GetSharedAccessSignature(sasConstraints);
//Return the URI string for the container, including the SAS token. return container.Uri + sasContainerToken; }
Incorrect Answers:
C: Call GetSharedAccessSignature on the container, not on the blob.
References: https://docs.microsoft.com/en-us/azure/storage/blobs/storage-dotnet-shared-access-signature-part-2
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C should be correct – link to each report must expire, not the entire container