public async Task <ObjectUrl> GetObjectUrlAsync(AzureObjectUrlRequest urlRequest)
{
ValidateUrlRequest(urlRequest);
var storageOptions = await storageAccountOptionsProvider.GetStorageAccountOptionsAsync(urlRequest.TenantId);
var storageAccount = CloudStorageAccount.Parse(storageOptions.ConnectionString);
var blobClient = storageAccount.CreateCloudBlobClient();
var blobContainer = blobClient.GetContainerReference(urlRequest.ContainerName.ToLower());
var blob = blobContainer.GetBlockBlobReference(urlRequest.BlobName);
var expirationDateTimeUtc = DateTime.UtcNow.Add(urlRequest.ExpirationPeriod);
var accessPolicy = new SharedAccessBlobPolicy {
SharedAccessExpiryTime = expirationDateTimeUtc
};
if (urlRequest.AccessMode == ObjectAccessMode.ReadOnly)
{
accessPolicy.Permissions = SharedAccessBlobPermissions.Read;
return(new ObjectUrl
{
ExpirationDateTimeUtc = expirationDateTimeUtc,
HttpMethod = HttpMethod.Get.Method,
Url = (blob.Uri + blob.GetSharedAccessSignature(accessPolicy, null, null, SharedAccessProtocol.HttpsOnly, null)),
AccessMode = ObjectAccessMode.ReadOnly.ToString()
});
}
else
{
accessPolicy.Permissions = SharedAccessBlobPermissions.Create | SharedAccessBlobPermissions.Write;
return(new ObjectUrl
{
ExpirationDateTimeUtc = expirationDateTimeUtc,
HttpMethod = HttpMethod.Put.Method,
RequestHeaders = new Dictionary <string, string> {
["x-ms-blob-type"] = "BlockBlob"
},
Url = (blob.Uri + blob.GetSharedAccessSignature(accessPolicy, null, null, SharedAccessProtocol.HttpsOnly, null)),
AccessMode = ObjectAccessMode.WriteOnly.ToString()
});
}
}
private void ValidateUrlRequest(AzureObjectUrlRequest urlRequest)
{
if (urlRequest == null)
{
throw new ArgumentNullException(nameof(urlRequest));
}
if (string.IsNullOrEmpty(urlRequest.ContainerName))
{
throw new ArgumentException($"{nameof(urlRequest.ContainerName)} is required.", nameof(urlRequest));
}
if (string.IsNullOrEmpty(urlRequest.BlobName))
{
throw new ArgumentException($"{nameof(urlRequest.BlobName)} is required.", nameof(urlRequest));
}
if (string.IsNullOrEmpty(urlRequest.TenantId))
{
throw new ArgumentException($"{nameof(urlRequest.TenantId)} is required.", nameof(urlRequest));
}
}