c# - 将 IFormFile 转换为 Stream 将内容类型设置为 application/octet-stream

Question

我想将图像文件上传到 Azure Blob 容器。我正在使用.net core webapi post方法上传图片。上传成功但内容类型无效，将原始image/jpeg类型转换为application/octet-stream.

[HttpPost]
public async Task<string> Post(IFormFile files)
{
    BlobClient blobClient = _containerClient.GetBlobClient(files.FileName);
    await blobClient.UploadAsync(files.OpenReadStream());
}

谁能帮助我如何上传保留原始内容类型的图像。

提前致谢。

标签： c#azureasp.net-coreazure-blob-storage

Answer 1

如果要在上传文件到 Azure blob 时设置 content-type，请参考以下代码

// I use the sdk Azure.Storage.Blobs
[HttpPost]
public async Task<string> Post(IFormFile file)
{
    var connectionString = "the account connection string";
            BlobServiceClient blobServiceClient = new BlobServiceClient(connectionString);
            BlobContainerClient containerClient =blobServiceClient.GetBlobContainerClient("test");
            await containerClient.CreateIfNotExistsAsync();
            BlobClient blobClient = containerClient.GetBlobClient(file.FileName);
            BlobHttpHeaders httpHeaders = new BlobHttpHeaders() { 
               ContentType=file.ContentType 
            };

            await blobClient.UploadAsync(file.OpenReadStream(), httpHeaders);

            return "OK";
}

测试（我在 Postman 中测试）