使用文件流压缩文件并上传到 Azure Blob 存储

Question

我正在创建一个带有 ASP.NET 核心的网站，我需要获取一堆文件，将它们压缩在一起，然后将它们上传到 Azure Blobstorage。它成功了，我得到了一个下载链接，但是当我下载文件时，我只得到一个我无法用任何东西打开的“文件”。

这是处理上传的代码：

            var moduleVersionReleaseFiles = _appDbContext
                .ModuleVersionReleaseFile
                .Where(x => x.ModuleVersionReleaseId == moduleVersionReleaseId)
                .ToList();

            string AzureBlobStorageConfig = _configuration["AzureBlobStorage"];
            var connectionString = _configuration["StorageConnectionString"];
            string containerName = moduleVersionReleaseId + "-" + Guid.NewGuid().ToString();

            BlobServiceClient blobServiceClient = new BlobServiceClient(connectionString);
            BlobContainerClient containerClient = await blobServiceClient.CreateBlobContainerAsync(containerName.ToLowerInvariant(), Azure.Storage.Blobs.Models.PublicAccessType.BlobContainer);

            BlobClient blobClient = containerClient.GetBlobClient(moduleVersionReleaseId.ToString());

            using var stream = new MemoryStream();
            using (var archive = new ZipArchive(stream, ZipArchiveMode.Create))
            {
                foreach (var moduleVersionReleaseFile in moduleVersionReleaseFiles)
                {
                    var entry = archive.CreateEntry(moduleVersionReleaseFile.File);
                    using (var entryStream = entry.Open())
                    using (var fileStream = File.OpenRead($"{moduleVersionReleaseFile.Path}\{moduleVersionReleaseFile.File}"))
                    {
                        await fileStream.CopyToAsync(entryStream);
                    }
                }

                stream.Position = 0;
                await blobClient.UploadAsync(stream, true);
                await stream.FlushAsync();
            }

            return blobClient.Uri.ToString();

我正在使用 Azurite 进行测试，所以我无法登录到 blobstorage 并在那里查看。

为什么我没有按预期下载文件时得到 zip 文件？

Answer 1

您无法打开 zip 文件的原因是它没有正确保存。你能试试下面的代码吗:

using var stream = new MemoryStream();
using (var archive = new ZipArchive(stream, ZipArchiveMode.Create))
{
    foreach (var moduleVersionReleaseFile in moduleVersionReleaseFiles)
    {
        var entry = archive.CreateEntry(moduleVersionReleaseFile.File);
        using (var entryStream = entry.Open())
        var fileContents = File.ReadAllBytes($"{moduleVersionReleaseFile.Path}\{moduleVersionReleaseFile.File}"));
        using (BinaryWriter zipFileBinary = new BinaryWriter(entryStream))
        {
            zipFileBinary.Write(fileContents);
        }
    }
    stream.Position = 0;
    await blobClient.UploadAsync(stream, true);
}

使用文件流压缩文件并上传到 Azure Blob 存储

Zipping files and uploading to Azure Blobstorage using filestream

azure

azure-blob-storage

asp.net-core