Azure Blob Storage Recovery from Snapshot

azure-storage-blob-recovery-from-recovery.cs

            var connsctionString = "your_connection_string";
            var cloudStorage = Microsoft.WindowsAzure.Storage.CloudStorageAccount.Parse(connsctionString);

            var cloudBlobClient = cloudStorage.CreateCloudBlobClient();
            var cloudBlobContainer = cloudBlobClient.GetContainerReference("donmablogsample");

            //建立如果不存在的話
            var resultCreateContainer = cloudBlobContainer.CreateIfNotExistsAsync().Result;
            Console.WriteLine("donmablogsample create already.");
            Microsoft.WindowsAzure.Storage.Blob.CloudBlobDirectory cloudBlobDirectory =
               cloudBlobContainer.GetDirectoryReference("TEST2/TEST21/");
           
            var bbReference = cloudBlobDirectory.GetBlockBlobReference("sampleText3.json");


            var res = new List<CloudBlockBlob>();
            Microsoft.WindowsAzure.Storage.Blob.BlobContinuationToken continuationToken = null;
            do
            {
                //只看 TEST2/TEST21/sampleText3.json 的快照
                var listingResult = cloudBlobContainer.ListBlobsSegmentedAsync("TEST2/TEST21/sampleText3.json", true, Microsoft.WindowsAzure.Storage.Blob.BlobListingDetails.Snapshots, 100, continuationToken, null, new Microsoft.WindowsAzure.Storage.OperationContext
                {

                }).Result;
                continuationToken = listingResult.ContinuationToken;
                res.AddRange(listingResult.Results.Select(x => (x as Microsoft.WindowsAzure.Storage.Blob.CloudBlockBlob)).ToList());
            }
            while (continuationToken != null);
            
            foreach (var r in res)
            {
                r.FetchAttributesAsync().GetAwaiter().GetResult();
                Console.WriteLine("Meta-tag:" + (r.Metadata.ContainsKey("tag") ? (r.Metadata["tag"]) : "") + "," + r.DownloadTextAsync().Result + ";" + " IsSnapShot:" + r.IsSnapshot);

            }

            //Recovery from tag:9
            //還原 tag 9 的快照
            var bFileInfo = cloudBlobDirectory.GetBlockBlobReference("sampleText3.json");
            foreach (var r in res)
            {
                if (r.IsSnapshot && r.Metadata.ContainsKey("tag"))
                {
                    if (r.Metadata["tag"] == "9")
                    {
                        var copyResult = bFileInfo.StartCopyAsync(r).Result;

                        Console.WriteLine("Copy Result:" + copyResult);
                    }
                }
            }