Attempting to find an example of uploading a large block blob (and thus breaking into blocks with a finalization using the blocklist api) in Azure using the SAS token approach with the REST endpoint resulted in finding a Javascript example. I worked through the code and turned it into C#. The important parts are that you add the comp and blockid as Base64 encoded strings to the end of the SAS url; and finalize the upload by calling the comp endpoint with an xml section with all the blocks listed.
async Task Main()
{
// Note: References Nuget Package RestSharp
var azureSasTokenGetUrl = "";
var maxBlockSize = 1024 * 1024 * 10; // 10MB block size
var fileToUpload = @"";
var info = new FileInfo(fileToUpload);
// custom URL for getting sas token accepted a file name value
var client = new RestClient($"{azureSasTokenGetUrl}?name={info.Name}");
var response = await client.GetAsync(new RestRequest());
if (response.IsSuccessful)
{
// clean url of any quotes
var sasUrl = response.Content.Replace("\"", string.Empty);
Console.WriteLine($"SAS URL: {sasUrl}");
var blobList = new List();
var uploadSuccess = false;
var fileLength = info.Length;
var numberBlocks = (fileLength % maxBlockSize == 0) ? (int)(fileLength / maxBlockSize) : (int)Math.Floor((double)fileLength / maxBlockSize) + 1;
client = new RestClient(sasUrl);
using (var stream = File.OpenRead(fileToUpload))
{
for (var i = 0; i < numberBlocks; i++)
{
var readSize = (int)(i == (numberBlocks - 1) ? fileLength - (i * maxBlockSize) : maxBlockSize);
var buffer = new byte[readSize];
var blockId = Convert.ToBase64String(ASCIIEncoding.ASCII.GetBytes(i.ToString().PadLeft(6, '0')));
var blockUrl = $"{sasUrl}&comp=block&blockid={blockId}";
Console.WriteLine($"{i}: {i * maxBlockSize}, length {readSize}");
blobList.Add(blockId);
var content = await stream.ReadAsync(buffer, 0, readSize);
var request = new RestRequest(blockUrl, Method.Put);
request.AddBody(buffer);
request.AddHeader("x-ms-blob-type", "BlockBlob");
response = await client.PutAsync(request);
uploadSuccess = response.IsSuccessful;
if (!response.IsSuccessful)
break;
}
stream.Close();
}
if (uploadSuccess)
{
var finalize = new RestRequest($"{sasUrl}&comp=blocklist");
finalize.AddStringBody($"<BlockList>{string.Concat(blobList.Select(b => "<Latest>" + b + "</Latest>"))}</BlockList>", DataFormat.Xml);
response = await client.PutAsync(finalize);
Console.WriteLine($"Success: {response.IsSuccessful}");
}
else
Console.WriteLine("FAILED");
}
}
test
