api - Blob 服务 REST API - 设置 x-ms-blob-content-type 时，Put Blob 返回 403 Forbidden

Question

我已成功在容器中创建 Blob，但是当我尝试设置 x-ms-blob-content-type header 时，没有创建 Blob，并且收到 403 错误。这是我的代码:

    var authorizationHeader = CreateAuthorizationHeader(stringToSign);

    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(blobEndpoint + urlPath);
    request.Method = requestMethod;
    request.Headers["x-ms-blob-type"] = blobType;            
    request.Headers["x-ms-date"] = dateInRfc1123Format;
    request.Headers["x-ms-version"] = storageServiceVersion;
    request.Headers["Authorization"] = authorizationHeader;
    request.ContentLength = blobLength;            

    try
    {
        using (Stream requestStream = await request.GetRequestStreamAsync())
        {
            requestStream.Write(blobContent, 0, blobLength);
        }

        using(HttpWebResponse response = (HttpWebResponse)await request.GetResponseAsync())
        {
            var eTag = response.Headers["ETag"];
        }
    }

但是每当我尝试添加这些行中的任何一行时，我都会收到 403:

request.Headers["x-ms-blob-content-type"] = "image/jpeg";
//or
request.ContentType = "image/jpeg";

大家有遇到过这种情况吗？感谢任何反馈，谢谢!

更新:添加下面的 stringToSign 代码。

var canonicalizedHeaders = String.Format(
    "x-ms-blob-type:{0}\nx-ms-date:{1}\nx-ms-version:{2}",
    blobType,
    dateInRfc1123Format,
    storageServiceVersion);
var canonicalizedResource = String.Format("/{0}/{1}", account, urlPath);
var stringToSign = String.Format(
    "{0}\n\n\n{1}\n\n\n\n\n\n\n\n\n{2}\n{3}",
    requestMethod,
    blobLength,
    canonicalizedHeaders,
    canonicalizedResource);

Answer 1

您是否在 canonicalizedHeaders 和 请求 header 中添加了 x-ms-blob-content-type ？将其添加到 canonicalizedHeaders 时，请确保这是第一个条目，因为需要对 header 进行排序。我拿了你的代码并添加了标题，它工作得很好。这是我的代码:

    private static async Task UploadBlob()
    {
        var blobType = "BlockBlob";
        var dateInRfc1123Format = DateTime.UtcNow.ToString("R");
        var storageServiceVersion = "2014-02-14";
        var blobContentType = "image/png";
        var canonicalizedHeaders = String.Format("x-ms-blob-content-type:{0}\nx-ms-blob-type:{1}\nx-ms-date:{2}\nx-ms-version:{3}", blobContentType, blobType, dateInRfc1123Format, storageServiceVersion);
        var urlPath = "test-test/AlarmClock1.png";
        var canonicalizedResource = String.Format("/{0}/{1}", accountName, urlPath);
        var requestMethod = "PUT";
        var fileContents = File.ReadAllBytes(@"D:\images\images\AlarmClock1.png");
        var blobLength = fileContents.Length;
        var stringToSign = String.Format("{0}\n\n\n{1}\n\n\n\n\n\n\n\n\n{2}\n{3}", requestMethod, blobLength, canonicalizedHeaders, canonicalizedResource);
        var authorizationHeader = SignThis(stringToSign);
        var blobEndpoint = "https://myaccountname.blob.core.windows.net/";
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(blobEndpoint + urlPath);
        request.Method = requestMethod;
        request.Headers["x-ms-blob-content-type"] = blobContentType;
        request.Headers["x-ms-blob-type"] = blobType;            
        request.Headers["x-ms-date"] = dateInRfc1123Format;
        request.Headers["x-ms-version"] = storageServiceVersion;
        request.Headers["Authorization"] = authorizationHeader;
        request.ContentLength = blobLength;   
        try
        {
            using (Stream requestStream = await request.GetRequestStreamAsync())
            {
                requestStream.Write(fileContents, 0, blobLength);
            }

            using(HttpWebResponse response = (HttpWebResponse)await request.GetResponseAsync())
            {
                var eTag = response.Headers["ETag"];
            }
        }
        catch (Exception excep)
        {

        }
    }