如何使用适用于C#的Amazon AWS SDK访问Eucalyptus Walrus(S3)

发布时间：2020-12-15 17:17:29 所属栏目：百科来源：网络整理

导读：我已经下载了适用于C#的Amazon AWS SDK,我可以访问运行Eucalyptus的私有云的EC2部分,我可以列出,图像,实例,区域…… 这很好用： AmazonEC2 ec2 = AWSClientFactory.CreateAmazonEC2Client("abcdefghijklmnopqrstuvwxyz1234567890","abcdefghijklmnopqrstuvwx

我已经下载了适用于C#的Amazon AWS SDK,我可以访问运行Eucalyptus的私有云的EC2部分,我可以列出,图像,实例,区域……

这很好用：

AmazonEC2 ec2 = AWSClientFactory.CreateAmazonEC2Client("abcdefghijklmnopqrstuvwxyz1234567890","abcdefghijklmnopqrstuvwxyz1234567890",new AmazonEC2Config().WithServiceURL("http://10.140.54.12:8773/services/Eucalyptus"));

DescribeInstancesRequest ec2Request = new DescribeInstancesRequest();
try
{
    DescribeInstancesResponse ec2Response = ec2.DescribeInstances(ec2Request);
    int numInstances = 0;
    numInstances = ec2Response.DescribeInstancesResult.Reservation.Count;
    textBoxInstancesLog.AppendText("You have " + numInstances + " running instances");
    textBoxInstancesLog.AppendText(ec2Response.ToString());
}
catch (Exception ex)
{
    MessageBox.Show(ex.ToString());
}

但我需要访问Cloud的Walrus(S3)部分.这就是我尝试访问Walrus的方式,代码几乎完全相同,但通过此调用我将得到一个例外.

这不起作用：

AmazonS3 s3 = AWSClientFactory.CreateAmazonS3Client("abcdefghijklmnopqrstuvwxyz1234567890",new AmazonS3Config().WithServiceURL("http://10.140.54.12:8773/services/Walrus"));
ListBucketsRequest s3Request = new ListBucketsRequest();
try
{
    ListBucketsResponse s3Response = s3.ListBuckets(s3Request);
    textBoxS3Log.AppendText(s3Response.ToString());
}
catch (Exception ex)
{
    MessageBox.Show(ex.ToString());
}

我会收到这个例外：

System.Net.WebException: The remote name could not be resolved: 'http'
   at Amazon.S3.AmazonS3Client.processRequestError(String actionName,HttpWebRequest request,WebException we,HttpWebResponse errorResponse,String requestAddr,WebHeaderCollection& respHdrs,Type t,Exception& cause)
   at Amazon.S3.AmazonS3Client.handleHttpWebErrorResponse(S3Request userRequest,HttpWebResponse httpResponse,Exception& cause,HttpStatusCode& statusCode)
   at Amazon.S3.AmazonS3Client.getResponseCallback[T](IAsyncResult result)
   at Amazon.S3.AmazonS3Client.endOperation[T](IAsyncResult result)
   at Amazon.S3.AmazonS3Client.ListBuckets(ListBucketsRequest request)
   at IAASClient.FormMain.buttonS3Test_Click(Object sender,EventArgs e) in X:workIAASClientFormMain.cs:line 107

来自Eucalyptus网站：

Eucalyptus implements an IaaS
(Infrastructure as a Service) private
cloud that is accessible via an API
compatible with Amazon EC2 and Amazon
S3

我错过了什么？

注意：相同的代码与Amazon S3完美配合,问题是访问Eucalyptus Walrus.

解决方法

您可以使用当前的Amazon AWS SDK for C#访问Walrus.如果你的Walrus URL包含像……这样的路径组件,它就不会像你期望的那样工作.

http://eucalyptus.test.local:8773/services/Walrus

以下是设置AmazonS3Client和请求的方法.请注意,服务URL的路径部分将放入bucketname中.

我已使用预先指定的URL和DeleteObjectRequest测试了此设置.我正在使用https://github.com/aws/aws-sdk-net版本的SDK 1.5.19.0版

var config = new Amazon.S3.AmazonS3Config
                {
                    ServiceURL = "eucalyptus.test.local:8773",CommunicationProtocol = Protocol.HTTP
                };

            var client = new Amazon.S3.AmazonS3Client("XXXXXXXXXXXXXXXXXXKEY","XXXXXXXXXXXXXXXXXXXXXXXXXXXXSECRET",config);
            var response = client.GetPreSignedURL(
                new GetPreSignedUrlRequest().WithBucketName("services/Walrus/BucketName")
                                            .WithExpires(DateTime.UtcNow.AddHours(10))
                                            .WithProtocol(Protocol.HTTP)
                                            .WithVerb(HttpVerb.PUT)
                                            .WithKey("video.mp4"));

（编辑：李大同）

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