英文:
How to list items in an aws S3 bucket directory
问题
我有一个名为"Project"的Amazon S3存储桶，并且想要找到"Project/screenshots/hotels"路径下文件的数量。当我只指定存储桶名称时，我只能获取整个S3中的文件总数，而当我在存储桶名称中指定完整路径时，出现错误。
以下是用Go SDK获取S3存储桶中文件列表的示例代码：
package main
import (
"fmt"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3"
"os"
)
// 列出指定S3存储桶中的项目
//
// 用法:
// go run s3_list_objects.go 存储桶名称
func main() {
bucket := "Project/screenshots/hotels"
// 初始化一个位于us-west-2区域的会话，SDK将使用该会话从共享凭证文件~/.aws/credentials中加载凭证。
sess, err := session.NewSession(&aws.Config{
Region: aws.String("us-east-1")},
)
var temp int64 = 1000000000
var maxKeys *int64
maxKeys = &temp
// 创建S3服务客户端
svc := s3.New(sess)
// 获取项目列表
resp, err := svc.ListObjectsV2(&s3.ListObjectsV2Input{Bucket: aws.String(bucket), MaxKeys: maxKeys})
if err != nil {
exitErrorf("无法列出存储桶 %q 中的项目，%v", bucket, err)
}
for _, item := range resp.Contents {
fmt.Println("名称: ", *item.Key)
fmt.Println("最后修改时间: ", *item.LastModified)
fmt.Println("大小: ", *item.Size)
fmt.Println("存储类别: ", *item.StorageClass)
fmt.Println("")
}
fmt.Println("在存储桶", bucket, "中找到", len(resp.Contents), "个项目")
fmt.Println("")
}
func exitErrorf(msg string, args ...interface{}) {
fmt.Fprintf(os.Stderr, msg+"\n", args...)
os.Exit(1)
}
你可以使用上述代码来获取指定路径下文件的数量。
英文:
I have an Amazon S3 bucket by name "Project" and want to find count of files in Project/screenshots/hotels. I am only getting total files in the whole s3 using Go SDK while specifying only bucket name and an error when specifying whole path in bucket name.
https://github.com/awsdocs/aws-doc-sdk-examples/blob/main/go/example_code/s3/s3_list_objects.go
package main
import (
"fmt"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3"
"os"
)
// Lists the items in the specified S3 Bucket
//
// Usage:
// go run s3_list_objects.go BUCKET_NAME
func main() {
bucket := "Project/screenshots/hotels"
// Initialize a session in us-west-2 that the SDK will use to load
// credentials from the shared credentials file ~/.aws/credentials.
sess, err := session.NewSession(&aws.Config{
Region: aws.String("us-east-1")},
)
var temp int64 = 1000000000
var maxKeys *int64
maxKeys = &temp
// Create S3 service client
svc := s3.New(sess)
// Get the list of items
resp, err := svc.ListObjectsV2(&s3.ListObjectsV2Input{Bucket: aws.String(bucket),MaxKeys: maxKeys})
if err != nil {
exitErrorf("Unable to list items in bucket %q, %v", bucket, err)
}
for _, item := range resp.Contents {
fmt.Println("Name: ", *item.Key)
fmt.Println("Last modified:", *item.LastModified)
fmt.Println("Size: ", *item.Size)
fmt.Println("Storage class:", *item.StorageClass)
fmt.Println("")
}
fmt.Println("Found", len(resp.Contents), "items in bucket", bucket)
fmt.Println("")
}
func exitErrorf(msg string, args ...interface{}) {
fmt.Fprintf(os.Stderr, msg+"\n", args...)
os.Exit(1)
}
答案1
得分: 3
剩下的“路径”不是存储桶的一部分。您想将Prefix设置为screenshots/hotels/。请参阅ListObjectV2Input文档。
英文:
The rest of the "path" is not part of the bucket. You want to set the Prefix to screenshots/hotels/.
See ListObjectV2Input doc
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