上传文件Amazon S3返回流不支持并发IO读写操作

Question

I try upload file in amazon s3, but always return this message.

My code:

AmazonS3Config S3Config = new AmazonS3Config()
{
    ServiceURL = "s3.amazonaws.com",
    CommunicationProtocol = Protocol.HTTP,
    RegionEndpoint = RegionEndpoint.SAEast1
};

using (AmazonS3Client client = new AmazonS3Client(KEY_S3, PASSWORD, S3Config))
{

    string pathInS3 = folder + "/" + fileName;
    PutObjectRequest request = new PutObjectRequest();

    request.WithBucketName(BUCKET_NAME);
    request.WithKey(pathInS3); 
    request.WithInputStream(memoryStreamFile);
    request.CannedACL = S3CannedACL.PublicReadWrite;

    client.PutObject(request);

}

I had use lock in request and client but do not resolve.

Answer 1

I think the problem is the memoryStreamFile, please do double check trying to read the content of your memorystreamFile.So another way to upload files to AmazonS3 with C# is the following:

            AmazonS3Config cfg = new AmazonS3Config();
            cfg.RegionEndpoint = Amazon.RegionEndpoint.EUCentral1;// region endpoint
            string bucketName = "your bucket";
            AmazonS3Client s3Client = new AmazonS3Client("your access key", "your secret key", cfg);            
            string dataString ="your data ";
            MemoryStream data = new System.IO.MemoryStream(UTF8Encoding.ASCII.GetBytes(dataString));
            TransferUtility t = new TransferUtility(s3Client);
            t.Upload(data, bucketName, "testUploadFromTransferUtility.txt");