C# S3示例

创建连接

这会创建一个连接，以便你可以与服务器交互。

using System;
using Amazon;
using Amazon.S3;
using Amazon.S3.Model;

string accessKey = "put your access key here!";
string secretKey = "put your secret key here!";

AmazonS3Config config = new AmazonS3Config();
config.ServiceURL = "objects.dreamhost.com";

AmazonS3Client s3Client = new AmazonS3Client(
        accessKey,
        secretKey,
        config
        );

列出拥有的存储桶

这会获取你拥有的存储桶列表。

ListBucketsResponse response = client.ListBuckets();
foreach (S3Bucket b in response.Buckets)
{
        Console.WriteLine("{0}\t{1}", b.BucketName, b.CreationDate);
}

输出看起来会像这样：

mahbuckat1   2011-04-21T18:05:39.000Z
mahbuckat2   2011-04-21T18:05:48.000Z
mahbuckat3   2011-04-21T18:07:18.000Z

创建存储桶

这会创建一个名为my-new-bucket

PutBucketRequest request = new PutBucketRequest();
request.BucketName = "my-new-bucket";
client.PutBucket(request);

列出存储桶的内容

这会获取存储桶中的对象列表。

ListObjectsRequest request = new ListObjectsRequest();
request.BucketName = "my-new-bucket";
ListObjectsResponse response = client.ListObjects(request);
foreach (S3Object o in response.S3Objects)
{
        Console.WriteLine("{0}\t{1}\t{2}", o.Key, o.Size, o.LastModified);
}

输出看起来会像这样：

myphoto1.jpg 251262  2011-08-08T21:35:48.000Z
myphoto2.jpg 262518  2011-08-08T21:38:01.000Z

删除存储桶

Note

存储桶必须是空的！否则它将不起作用！

DeleteBucketRequest request = new DeleteBucketRequest();
request.BucketName = "my-new-bucket";
client.DeleteBucket(request);

非空存储桶的强制删除

注意

不可用

创建对象

这会创建一个文件hello.txt包含字符串"Hello World!"

PutObjectRequest request = new PutObjectRequest();
request.BucketName  = "my-new-bucket";
request.Key         = "hello.txt";
request.ContentType = "text/plain";
request.ContentBody = "Hello World!";
client.PutObject(request);

更改对象的 ACL

这会使对象hello.txt对公众可读，secret_plans.txt并且是私有的。

PutACLRequest request = new PutACLRequest();
request.BucketName = "my-new-bucket";
request.Key        = "hello.txt";
request.CannedACL  = S3CannedACL.PublicRead;
client.PutACL(request);

PutACLRequest request2 = new PutACLRequest();
request2.BucketName = "my-new-bucket";
request2.Key        = "secret_plans.txt";
request2.CannedACL  = S3CannedACL.Private;
client.PutACL(request2);

下载对象（到文件）

这会下载对象perl_poetry.pdf并将其保存到C:\Users\larry\Documents

GetObjectRequest request = new GetObjectRequest();
request.BucketName = "my-new-bucket";
request.Key        = "perl_poetry.pdf";
GetObjectResponse response = client.GetObject(request);
response.WriteResponseStreamToFile("C:\\Users\\larry\\Documents\\perl_poetry.pdf");

删除对象

这会删除对象goodbye.txt

DeleteObjectRequest request = new DeleteObjectRequest();
request.BucketName = "my-new-bucket";
request.Key        = "goodbye.txt";
client.DeleteObject(request);

生成对象下载 URL（签名和未签名的）

这会为hello.txt生成一个未签名的下载 URL。这之所以有效，是因为我们通过上述设置 ACL 使其公开。hello.txt public by setting the ACL above. This then generates a signed download URL for secret_plans.txt生成一个签名下载 URL，该 URL 将在 1 小时内有效。签名下载 URL 即使对象是私有的，在有效期内也会有效（当有效期结束时，URL 将停止工作）。

Note

C# S3库没有生成未签名URL的方法，因此以下示例仅展示生成签名URL。

GetPreSignedUrlRequest request = new GetPreSignedUrlRequest();
request.BucketName = "my-bucket-name";
request.Key        = "secret_plans.txt";
request.Expires    = DateTime.Now.AddHours(1);
request.Protocol   = Protocol.HTTP;
string url = client.GetPreSignedURL(request);
Console.WriteLine(url);

这的输出看起来会像这样：

http://objects.dreamhost.com/my-bucket-name/secret_plans.txt?Signature=XXXXXXXXXXXXXXXXXXXXXXXXXXX&Expires=1316027075&AWSAccessKeyId=XXXXXXXXXXXXXXXXXXX

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