使用公共權限上傳Amazon S3

Question

我正在使用Amazon C＃SDK並嘗試上傳文件，但默認情況下它具有受限制的權限。 我想公開發布它，但我似乎無法找到如何在上傳過程中執行此操作。

我的存儲桶是公共的，但是當我使用下面的代碼上傳新文件時，我上傳的文件不公開。

以前有人不得不這樣做嗎？

public class S3Uploader
{
    private string awsAccessKeyId;
    private string awsSecretAccessKey;
    private string bucketName;
    private Amazon.S3.Transfer.TransferUtility transferUtility;

    public S3Uploader(string bucketName)
    {
        this.bucketName = bucketName;
        this.transferUtility = new Amazon.S3.Transfer.TransferUtility("XXXXXXXXXXXXXXXXXX", "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX");

    }

    public void UploadFile(string filePath, string toPath)
    {
        AsyncCallback callback = new AsyncCallback(uploadComplete);
        transferUtility.BeginUpload(filePath, bucketName, toPath, callback, null);
    }

    private void uploadComplete(IAsyncResult result)
    { 
        var x = result;
    }
}

Answer 1

Tahbaza的解決方案是正確的，但它在AWS SDK（2.1 +）的更高版本中不起作用......

考慮在2.1+版本的SDK中使用以下內容：

private void UploadFileToS3(string filePath)
{
    var awsAccessKey = ConfigurationManager.AppSettings["AWSAccessKey"];
    var awsSecretKey = ConfigurationManager.AppSettings["AWSSecretKey"];
    var existingBucketName = ConfigurationManager.AppSettings["AWSBucketName"];
    var client = Amazon.AWSClientFactory.CreateAmazonS3Client(awsAccessKey, awsSecretKey,RegionEndpoint.USEast1);

    var uploadRequest = new TransferUtilityUploadRequest
    {
        FilePath = filePath,
        BucketName = existingBucketName,
        CannedACL = S3CannedACL.PublicRead
    };

var fileTransferUtility = new TransferUtility(client);
    fileTransferUtility.Upload(uploadRequest);
} 

Answer 2

找到它，需要使用TransferUtilityUploadRequest ：

public class S3Uploader
{
    private string awsAccessKeyId;
    private string awsSecretAccessKey;
    private string bucketName;
    private Amazon.S3.Transfer.TransferUtility transferUtility;

    public S3Uploader(string bucketName)
    {
        this.bucketName = bucketName;
        this.transferUtility = new Amazon.S3.Transfer.TransferUtility("XXXXXXXXXXXXXXXXXX", "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX");

    }

    public void UploadFile(string filePath, string toPath)
    {
        AsyncCallback callback = new AsyncCallback(uploadComplete);
        var uploadRequest = new TransferUtilityUploadRequest();
        uploadRequest.FilePath = filePath;
        uploadRequest.BucketName = "my_s3_bucket";
        uploadRequest.Key = toPath;
        uploadRequest.AddHeader("x-amz-acl", "public-read");
        transferUtility.BeginUpload(uploadRequest, callback, null);
    }

    private void uploadComplete(IAsyncResult result)
    { 
        var x = result;
    }
}

Answer 3

我以前在C＃中已經完成了這個，但是你的庫沒有（所以這可能是有限的幫助）。

我們的想法是發送ACL標頭和文件。

這是一種可以指向正確方向的方法。

這里還有一些指向相關AWS文檔的鏈接 。

    private const string AWS_ACL_HEADER = "x-amz-acl";

    private static string ToACLString(S3ACLType acl) {
        switch (acl) {
            case S3ACLType.AuthenticatedRead:
                return "authenticated-read";
            case S3ACLType.BucketOwnerFullControl:
                return "bucket-owner-full-control";
            case S3ACLType.BucketOwnerRead:
                return "bucket-owner-read";
            case S3ACLType.Private:
                return "private";
            case S3ACLType.PublicRead:
                return "public-read";
            case S3ACLType.PublicReadWrite:
                return "public-read-write";
            default: return "";
        }
    }

    public void Put(string bucketName, string id, byte[] bytes, string contentType, S3ACLType acl) {
        string uri = String.Format("https://{0}/{1}", BASE_SERVICE_URL, bucketName.ToLower());
        DreamMessage msg = DreamMessage.Ok(MimeType.BINARY, bytes);
        msg.Headers[DreamHeaders.CONTENT_TYPE] = contentType;
        msg.Headers[DreamHeaders.EXPECT] = "100-continue";
        msg.Headers[AWS_ACL_HEADER] = ToACLString(acl);
        Plug s3Client = Plug.New(uri).WithPreHandler(S3AuthenticationHeader);
        s3Client.At(id).Put(msg);
    }

Answer 4

考慮CannedACL方法，如下面的代碼段所示：

        string filePath = @"Path\Desert.jpg";
        Stream input = new FileStream(filePath, FileMode.Open);
        PutObjectRequest request2 = new PutObjectRequest();
        request2.WithMetaData("title", "the title")
            .WithBucketName(bucketName)
            .WithCannedACL(S3CannedACL.PublicRead)
            .WithKey(keyName)
            .WithInputStream(input);

Answer 5

您可以使用Amazon.S3.Model.PutObjectRequest的CannedACL屬性將文件上傳到S3，如下所示，

 var putObjectRequest = new Amazon.S3.Model.PutObjectRequest
                        {
                            BucketName = bucketName,
                            Key = key,
                            CannedACL = S3CannedACL.PublicReadWrite
                        };