AWS 文档 AWS SDK示例 GitHub 存储库中还有更多SDK示例
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与 AWS SDK或HeadBucket
一起使用 CLI
以下代码示例演示如何使用 HeadBucket
。
- Bash
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- AWS CLI 使用 Bash 脚本
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注意
还有更多相关信息 GitHub。查找完整示例,学习如何在 AWS 代码示例存储库
中进行设置和运行。 ############################################################################### # function bucket_exists # # This function checks to see if the specified bucket already exists. # # Parameters: # $1 - The name of the bucket to check. # # Returns: # 0 - If the bucket already exists. # 1 - If the bucket doesn't exist. ############################################################################### function bucket_exists() { local bucket_name bucket_name=$1 # Check whether the bucket already exists. # We suppress all output - we're interested only in the return code. if aws s3api head-bucket \ --bucket "$bucket_name" \ >/dev/null 2>&1; then return 0 # 0 in Bash script means true. else return 1 # 1 in Bash script means false. fi }
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有关API详细信息,请参阅AWS CLI 命令参考HeadBucket中的。
-
- CLI
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- AWS CLI
-
以下命令验证对名为
my-bucket
的存储桶的访问权限:aws s3api head-bucket --bucket
my-bucket
如果存储桶存在并且您可以访问它,则不返回任何输出。否则,会显示错误消息。例如:
A client error (404) occurred when calling the HeadBucket operation: Not Found
-
有关API详细信息,请参阅AWS CLI 命令参考HeadBucket
中的。
-
- Go
-
- SDK适用于 Go V2
-
注意
还有更多相关信息 GitHub。查找完整示例,学习如何在 AWS 代码示例存储库
中进行设置和运行。 // BucketBasics encapsulates the Amazon Simple Storage Service (Amazon S3) actions // used in the examples. // It contains S3Client, an Amazon S3 service client that is used to perform bucket // and object actions. type BucketBasics struct { S3Client *s3.Client } // BucketExists checks whether a bucket exists in the current account. func (basics BucketBasics) BucketExists(bucketName string) (bool, error) { _, err := basics.S3Client.HeadBucket(context.TODO(), &s3.HeadBucketInput{ Bucket: aws.String(bucketName), }) exists := true if err != nil { var apiError smithy.APIError if errors.As(err, &apiError) { switch apiError.(type) { case *types.NotFound: log.Printf("Bucket %v is available.\n", bucketName) exists = false err = nil default: log.Printf("Either you don't have access to bucket %v or another error occurred. "+ "Here's what happened: %v\n", bucketName, err) } } } else { log.Printf("Bucket %v exists and you already own it.", bucketName) } return exists, err }
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有关API详细信息,请参阅 “AWS SDK for Go API参考 HeadBucket
” 中的。
-
- Python
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- SDK适用于 Python (Boto3)
-
注意
还有更多相关信息 GitHub。查找完整示例,学习如何在 AWS 代码示例存储库
中进行设置和运行。 class BucketWrapper: """Encapsulates S3 bucket actions.""" def __init__(self, bucket): """ :param bucket: A Boto3 Bucket resource. This is a high-level resource in Boto3 that wraps bucket actions in a class-like structure. """ self.bucket = bucket self.name = bucket.name def exists(self): """ Determine whether the bucket exists and you have access to it. :return: True when the bucket exists; otherwise, False. """ try: self.bucket.meta.client.head_bucket(Bucket=self.bucket.name) logger.info("Bucket %s exists.", self.bucket.name) exists = True except ClientError: logger.warning( "Bucket %s doesn't exist or you don't have access to it.", self.bucket.name, ) exists = False return exists
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有关API详细信息,请参阅HeadBucket中的 AWS SDKPython (Boto3) API 参考。
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GetPublicAccessBlock
HeadObject