// updates blob if possible. // if blob doesn't already exist OR does not have a signature file // then we just upload as usual. public long UploadFile(string containerName, string blobName, string localFilePath) { var fileLength = CommonOps.GetFileSize(localFilePath); // not used here but is cached for later. // WORK IN PROGRESS DONT ERASE THIS LINE. //ConfigHelper.GetSignatureSize(fileLength, true); // 1) Does remote blob exist? // 2) if so, download existing signature for blob. if (AzureHelper.DoesBlobExist(containerName, blobName) && AzureHelper.DoesBlobSignatureExist(containerName, blobName)) { // 3) If blob exists and have signature, then let the magic begin. // 3.1) Download existing blob signature from Azure. // 3.2) Search through local file for matches in existing blob signature. // 3.3) Upload differences to Azure // 3.4) Upload new signature.s var blobSig = DownloadSignatureForBlob(containerName, blobName); var searchResults = CommonOps.SearchLocalFileForSignatures(localFilePath, blobSig); var allBlocks = UploadDelta(localFilePath, searchResults, containerName, blobName); var sig = CommonOps.CreateSignatureFromNewAndReusedBlocks(allBlocks); UploadSignatureForBlob(blobName, containerName, sig); long bytesUploaded = allBlocks.Where(b => b.IsNew).Select(b => b.Size).Sum(); return(bytesUploaded); } else { // 4) If blob or signature does NOT exist, just upload as normal. No tricky stuff to do here. // 4.1) Generate signature and upload it. var remainingBytes = new RemainingBytes() { BeginOffset = 0, EndOffset = fileLength - 1 }; var allUploadedBlocks = UploadBytesParallel(remainingBytes, localFilePath, containerName, blobName); // var allUploadedBlocks = UploadBytes(remainingBytes, localFilePath, containerName, blobName); var res = (from b in allUploadedBlocks orderby b.Offset ascending select b.BlockId); PutBlockList(res.ToArray(), containerName, blobName); var sig = CommonOps.CreateSignatureForLocalFile(localFilePath); UploadSignatureForBlob(blobName, containerName, sig); return(fileLength); } }