How to zip blobs using ICSharpCode.SharpZipLib.Zip - azure

Question

I am using latest the azure sdk Azure.Storage.Blobs version 12.9.1 for C# . I have to move all blobs from one container to another . I have listed all blobs but I am stuck at how to open an output stream to write a blob in another container .
FileStream fs = File.OpenWrite("\\" + str+"zip");
using (var zipOutputStream = new ZipOutputStream(fs))
{
foreach (var blobFileName in files)
{
zipOutputStream.SetLevel(5);
var blob = dirFromZip.GetBlobClient(blobFileName);
var entry = new ZipEntry(blobFileName);
zipOutputStream.PutNextEntry(entry);
blob.DownloadTo(zipOutputStream);
}
fs.Position = 0;
var blobClient = dirwhereZip.GetBlobClient(str);
blobClient.Upload(fs);
zipOutputStream.Finish();
zipOutputStream.Close();
}
Error : System.NotSupportedException: Stream does not support reading.

Answer 1

Please try the code below:
using System;
using System.Threading.Tasks;
using Azure.Storage.Blobs;
using Azure.Storage.Blobs.Models;
using System.IO;
using ICSharpCode.SharpZipLib.Zip;
namespace SO68566758
{
class Program
{
private const string connectionString = "DefaultEndpointsProtocol=https;AccountName=account-name;AccountKey=account-key";
private const string sourceContainer = "source-container";
private const string targetContainer = "target-container";
private const string outputBlobName = "backup.zip";
static async Task Main(string[] args)
{
BlobServiceClient serviceClient = new BlobServiceClient(connectionString);
BlobContainerClient sourceContainerClient = serviceClient.GetBlobContainerClient(sourceContainer);
BlobContainerClient targetContainerClient = serviceClient.GetBlobContainerClient(targetContainer);
var blobs = sourceContainerClient.GetBlobsAsync();
using (var fs = new FileStream(outputBlobName, FileMode.OpenOrCreate))
{
using (var zipOutputStream = new ZipOutputStream(fs))
{
await foreach (var blob in blobs)
{
var blobName = blob.Name;
var blobClient = sourceContainerClient.GetBlobClient(blobName);
//var downloadResponse = await blobClient.DownloadAsync();
//var streamContent = downloadResponse.Value.Content;
var entry = new ZipEntry(blobName);
zipOutputStream.PutNextEntry(entry);
await blobClient.DownloadToAsync(zipOutputStream);
}
}
}
BlobClient targetBlob = targetContainerClient.GetBlobClient(outputBlobName);
using (FileStream fs = new FileStream(outputBlobName, FileMode.Open))
{
await targetBlob.UploadAsync(fs);
}
}
}
}