确定是否基于通配符的S3存储桶的对象存在

问题描述

有人能告诉我如何确定某个文件/对象存在于一个S3桶，如果它存在，或显示一条消息，如果它不存在。

Can someone please show me how to determine if a certain file/object exists in a S3 bucket and display a message if it exists or if it does not exist.

基本上我希望它：

1）检查水桶在我的S3帐户，例如testbucket

1) Check a bucket on my S3 account such as testbucket

2）在那个桶，看看是否有与preFIX test_（test_file.txt或test_data.txt）的文件。

2) Inside of that bucket, look to see if there is a file with the prefix test_ (test_file.txt or test_data.txt).

3）如果该文件存在，然后显示一个消息框（或控制台消息）文件是否存在，或者该文件不存在。

3) If that file exists, then display a MessageBox (or Console message) that the file exists, or that the file does not exist.

有人能告诉我如何做到这一点？

Can someone please show me how to do this?

推荐答案

使用AWSSDK对于.NET我目前做线沿线的东西：

Using the AWSSDK For .Net I Currently do something along the lines of:

public bool Exists(string fileKey, string bucketName)
{
        try
        {
            response = _s3Client.GetObjectMetadata(new GetObjectMetadataRequest()
               .WithBucketName(bucketName)
               .WithKey(key));

            return true;
        }

        catch (Amazon.S3.AmazonS3Exception ex)
        {
            if (ex.StatusCode == System.Net.HttpStatusCode.NotFound)
                return false;

            //status wasn't not found, so throw the exception
            throw;
        }
}

据还挺很烂，但它现在是这样。

It kinda sucks, but it works for now.

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