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Gunakan ListObjectsV2
dengan AWS SDK atau CLI
Contoh kode berikut menunjukkan cara menggunakanListObjectsV2
.
Contoh tindakan adalah kutipan kode dari program yang lebih besar dan harus dijalankan dalam konteks. Anda dapat melihat tindakan ini dalam konteks dalam contoh kode berikut:
- .NET
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- AWS SDK for .NET
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catatan
Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode
. /// <summary> /// Shows how to list the objects in an Amazon S3 bucket. /// </summary> /// <param name="client">An initialized Amazon S3 client object.</param> /// <param name="bucketName">The name of the bucket for which to list /// the contents.</param> /// <returns>A boolean value indicating the success or failure of the /// copy operation.</returns> public static async Task<bool> ListBucketContentsAsync(IAmazonS3 client, string bucketName) { try { var request = new ListObjectsV2Request { BucketName = bucketName, MaxKeys = 5, }; Console.WriteLine("--------------------------------------"); Console.WriteLine($"Listing the contents of {bucketName}:"); Console.WriteLine("--------------------------------------"); ListObjectsV2Response response; do { response = await client.ListObjectsV2Async(request); response.S3Objects .ForEach(obj => Console.WriteLine($"{obj.Key,-35}{obj.LastModified.ToShortDateString(),10}{obj.Size,10}")); // If the response is truncated, set the request ContinuationToken // from the NextContinuationToken property of the response. request.ContinuationToken = response.NextContinuationToken; } while (response.IsTruncated); return true; } catch (AmazonS3Exception ex) { Console.WriteLine($"Error encountered on server. Message:'{ex.Message}' getting list of objects."); return false; } }
Daftar objek dengan paginator.
using System; using System.Threading.Tasks; using Amazon.S3; using Amazon.S3.Model; /// <summary> /// The following example lists objects in an Amazon Simple Storage /// Service (Amazon S3) bucket. /// </summary> public class ListObjectsPaginator { private const string BucketName = "doc-example-bucket"; public static async Task Main() { IAmazonS3 s3Client = new AmazonS3Client(); Console.WriteLine($"Listing the objects contained in {BucketName}:\n"); await ListingObjectsAsync(s3Client, BucketName); } /// <summary> /// This method uses a paginator to retrieve the list of objects in an /// an Amazon S3 bucket. /// </summary> /// <param name="client">An Amazon S3 client object.</param> /// <param name="bucketName">The name of the S3 bucket whose objects /// you want to list.</param> public static async Task ListingObjectsAsync(IAmazonS3 client, string bucketName) { var listObjectsV2Paginator = client.Paginators.ListObjectsV2(new ListObjectsV2Request { BucketName = bucketName, }); await foreach (var response in listObjectsV2Paginator.Responses) { Console.WriteLine($"HttpStatusCode: {response.HttpStatusCode}"); Console.WriteLine($"Number of Keys: {response.KeyCount}"); foreach (var entry in response.S3Objects) { Console.WriteLine($"Key = {entry.Key} Size = {entry.Size}"); } } } }
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Untuk API detailnya, lihat ListObjectsV2 di AWS SDK for .NET APIReferensi.
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- Bash
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- AWS CLI dengan skrip Bash
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catatan
Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode
. ############################################################################### # function errecho # # This function outputs everything sent to it to STDERR (standard error output). ############################################################################### function errecho() { printf "%s\n" "$*" 1>&2 } ############################################################################### # function list_items_in_bucket # # This function displays a list of the files in the bucket with each file's # size. The function uses the --query parameter to retrieve only the key and # size fields from the Contents collection. # # Parameters: # $1 - The name of the bucket. # # Returns: # The list of files in text format. # And: # 0 - If successful. # 1 - If it fails. ############################################################################### function list_items_in_bucket() { local bucket_name=$1 local response response=$(aws s3api list-objects \ --bucket "$bucket_name" \ --output text \ --query 'Contents[].{Key: Key, Size: Size}') # shellcheck disable=SC2181 if [[ ${?} -eq 0 ]]; then echo "$response" else errecho "ERROR: AWS reports s3api list-objects operation failed.\n$response" return 1 fi }
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Untuk API detailnya, lihat ListObjectsV2 di Referensi AWS CLI Perintah.
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- C++
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- SDKuntuk C ++
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catatan
Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode
. bool AwsDoc::S3::listObjects(const Aws::String &bucketName, Aws::Vector<Aws::String> &keysResult, const Aws::S3::S3ClientConfiguration &clientConfig) { Aws::S3::S3Client s3Client(clientConfig); Aws::S3::Model::ListObjectsV2Request request; request.WithBucket(bucketName); Aws::String continuationToken; // Used for pagination. Aws::Vector<Aws::S3::Model::Object> allObjects; do { if (!continuationToken.empty()) { request.SetContinuationToken(continuationToken); } auto outcome = s3Client.ListObjectsV2(request); if (!outcome.IsSuccess()) { std::cerr << "Error: listObjects: " << outcome.GetError().GetMessage() << std::endl; return false; } else { Aws::Vector<Aws::S3::Model::Object> objects = outcome.GetResult().GetContents(); allObjects.insert(allObjects.end(), objects.begin(), objects.end()); continuationToken = outcome.GetResult().GetNextContinuationToken(); } } while (!continuationToken.empty()); std::cout << allObjects.size() << " object(s) found:" << std::endl; for (const auto &object: allObjects) { std::cout << " " << object.GetKey() << std::endl; keysResult.push_back(object.GetKey()); } return true; }
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Untuk API detailnya, lihat ListObjectsV2 di AWS SDK for C++ APIReferensi.
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- CLI
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- AWS CLI
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Untuk mendapatkan daftar objek dalam ember
list-objects-v2
Contoh berikut mencantumkan objek dalam bucket yang ditentukan.aws s3api list-objects-v2 \ --bucket
my-bucket
Output:
{ "Contents": [ { "LastModified": "2019-11-05T23:11:50.000Z", "ETag": "\"621503c373607d548b37cff8778d992c\"", "StorageClass": "STANDARD", "Key": "doc1.rtf", "Size": 391 }, { "LastModified": "2019-11-05T23:11:50.000Z", "ETag": "\"a2cecc36ab7c7fe3a71a273b9d45b1b5\"", "StorageClass": "STANDARD", "Key": "doc2.rtf", "Size": 373 }, { "LastModified": "2019-11-05T23:11:50.000Z", "ETag": "\"08210852f65a2e9cb999972539a64d68\"", "StorageClass": "STANDARD", "Key": "doc3.rtf", "Size": 399 }, { "LastModified": "2019-11-05T23:11:50.000Z", "ETag": "\"d1852dd683f404306569471af106988e\"", "StorageClass": "STANDARD", "Key": "doc4.rtf", "Size": 6225 } ] }
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Untuk API detailnya, lihat ListObjectsV2
di Referensi AWS CLI Perintah.
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- Go
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- SDKuntuk Go V2
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catatan
Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode
. // 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 } // ListObjects lists the objects in a bucket. func (basics BucketBasics) ListObjects(bucketName string) ([]types.Object, error) { result, err := basics.S3Client.ListObjectsV2(context.TODO(), &s3.ListObjectsV2Input{ Bucket: aws.String(bucketName), }) var contents []types.Object if err != nil { log.Printf("Couldn't list objects in bucket %v. Here's why: %v\n", bucketName, err) } else { contents = result.Contents } return contents, err }
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Untuk API detailnya, lihat ListObjectsV2
di AWS SDK for Go APIReferensi.
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- Java
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- SDKuntuk Java 2.x
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catatan
Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode
. import software.amazon.awssdk.regions.Region; import software.amazon.awssdk.services.s3.S3Client; import software.amazon.awssdk.services.s3.model.ListObjectsRequest; import software.amazon.awssdk.services.s3.model.ListObjectsResponse; import software.amazon.awssdk.services.s3.model.S3Exception; import software.amazon.awssdk.services.s3.model.S3Object; import java.util.List; /** * Before running this Java V2 code example, set up your development * environment, including your credentials. * * For more information, see the following documentation topic: * * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html */ public class ListObjects { public static void main(String[] args) { final String usage = """ Usage: <bucketName>\s Where: bucketName - The Amazon S3 bucket from which objects are read.\s """; if (args.length != 1) { System.out.println(usage); System.exit(1); } String bucketName = args[0]; Region region = Region.US_EAST_1; S3Client s3 = S3Client.builder() .region(region) .build(); listBucketObjects(s3, bucketName); s3.close(); } public static void listBucketObjects(S3Client s3, String bucketName) { try { ListObjectsRequest listObjects = ListObjectsRequest .builder() .bucket(bucketName) .build(); ListObjectsResponse res = s3.listObjects(listObjects); List<S3Object> objects = res.contents(); for (S3Object myValue : objects) { System.out.print("\n The name of the key is " + myValue.key()); System.out.print("\n The object is " + calKb(myValue.size()) + " KBs"); System.out.print("\n The owner is " + myValue.owner()); } } catch (S3Exception e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } } // convert bytes to kbs. private static long calKb(Long val) { return val / 1024; } }
Buat daftar objek menggunakan penomoran halaman.
import software.amazon.awssdk.regions.Region; import software.amazon.awssdk.services.s3.S3Client; import software.amazon.awssdk.services.s3.model.ListObjectsV2Request; import software.amazon.awssdk.services.s3.model.S3Exception; import software.amazon.awssdk.services.s3.paginators.ListObjectsV2Iterable; public class ListObjectsPaginated { public static void main(String[] args) { final String usage = """ Usage: <bucketName>\s Where: bucketName - The Amazon S3 bucket from which objects are read.\s """; if (args.length != 1) { System.out.println(usage); System.exit(1); } String bucketName = args[0]; Region region = Region.US_EAST_1; S3Client s3 = S3Client.builder() .region(region) .build(); listBucketObjects(s3, bucketName); s3.close(); } public static void listBucketObjects(S3Client s3, String bucketName) { try { ListObjectsV2Request listReq = ListObjectsV2Request.builder() .bucket(bucketName) .maxKeys(1) .build(); ListObjectsV2Iterable listRes = s3.listObjectsV2Paginator(listReq); listRes.stream() .flatMap(r -> r.contents().stream()) .forEach(content -> System.out.println(" Key: " + content.key() + " size = " + content.size())); } catch (S3Exception e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } } }
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Untuk API detailnya, lihat ListObjectsV2 di AWS SDK for Java 2.x APIReferensi.
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- JavaScript
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- SDKuntuk JavaScript (v3)
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catatan
Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode
. Buat daftar semua objek di bucket Anda. Jika ada lebih dari satu objek, IsTruncated dan NextContinuationToken akan digunakan untuk iterasi atas daftar lengkap.
import { S3Client, // This command supersedes the ListObjectsCommand and is the recommended way to list objects. ListObjectsV2Command, } from "@aws-sdk/client-s3"; const client = new S3Client({}); export const main = async () => { const command = new ListObjectsV2Command({ Bucket: "my-bucket", // The default and maximum number of keys returned is 1000. This limits it to // one for demonstration purposes. MaxKeys: 1, }); try { let isTruncated = true; console.log("Your bucket contains the following objects:\n"); let contents = ""; while (isTruncated) { const { Contents, IsTruncated, NextContinuationToken } = await client.send(command); const contentsList = Contents.map((c) => ` • ${c.Key}`).join("\n"); contents += contentsList + "\n"; isTruncated = IsTruncated; command.input.ContinuationToken = NextContinuationToken; } console.log(contents); } catch (err) { console.error(err); } };
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Untuk API detailnya, lihat ListObjectsV2 di AWS SDK for JavaScript APIReferensi.
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- Kotlin
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- SDKuntuk Kotlin
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catatan
Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode
. suspend fun listBucketObjects(bucketName: String) { val request = ListObjectsRequest { bucket = bucketName } S3Client { region = "us-east-1" }.use { s3 -> val response = s3.listObjects(request) response.contents?.forEach { myObject -> println("The name of the key is ${myObject.key}") println("The object is ${myObject.size?.let { calKb(it) }} KBs") println("The owner is ${myObject.owner}") } } } private fun calKb(intValue: Long): Long = intValue / 1024
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Untuk API detailnya, lihat ListObjectsV2 AWS
SDKuntuk API referensi Kotlin.
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- PHP
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- SDKuntuk PHP
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catatan
Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode
. Buat daftar objek dalam bucket.
$s3client = new Aws\S3\S3Client(['region' => 'us-west-2']); try { $contents = $this->s3client->listObjectsV2([ 'Bucket' => $this->bucketName, ]); echo "The contents of your bucket are: \n"; foreach ($contents['Contents'] as $content) { echo $content['Key'] . "\n"; } } catch (Exception $exception) { echo "Failed to list objects in $this->bucketName with error: " . $exception->getMessage(); exit("Please fix error with listing objects before continuing."); }
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Untuk API detailnya, lihat ListObjectsV2 di AWS SDK for PHP APIReferensi.
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- Python
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- SDKuntuk Python (Boto3)
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catatan
Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode
. class ObjectWrapper: """Encapsulates S3 object actions.""" def __init__(self, s3_object): """ :param s3_object: A Boto3 Object resource. This is a high-level resource in Boto3 that wraps object actions in a class-like structure. """ self.object = s3_object self.key = self.object.key @staticmethod def list(bucket, prefix=None): """ Lists the objects in a bucket, optionally filtered by a prefix. :param bucket: The bucket to query. This is a Boto3 Bucket resource. :param prefix: When specified, only objects that start with this prefix are listed. :return: The list of objects. """ try: if not prefix: objects = list(bucket.objects.all()) else: objects = list(bucket.objects.filter(Prefix=prefix)) logger.info( "Got objects %s from bucket '%s'", [o.key for o in objects], bucket.name ) except ClientError: logger.exception("Couldn't get objects for bucket '%s'.", bucket.name) raise else: return objects
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Untuk API detailnya, lihat ListObjectsV2 AWS SDKuntuk Referensi Python (Boto3). API
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- Ruby
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- SDKuntuk Ruby
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catatan
Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode
. require "aws-sdk-s3" # Wraps Amazon S3 bucket actions. class BucketListObjectsWrapper attr_reader :bucket # @param bucket [Aws::S3::Bucket] An existing Amazon S3 bucket. def initialize(bucket) @bucket = bucket end # Lists object in a bucket. # # @param max_objects [Integer] The maximum number of objects to list. # @return [Integer] The number of objects listed. def list_objects(max_objects) count = 0 puts "The objects in #{@bucket.name} are:" @bucket.objects.each do |obj| puts "\t#{obj.key}" count += 1 break if count == max_objects end count rescue Aws::Errors::ServiceError => e puts "Couldn't list objects in bucket #{bucket.name}. Here's why: #{e.message}" 0 end end # Example usage: def run_demo bucket_name = "doc-example-bucket" wrapper = BucketListObjectsWrapper.new(Aws::S3::Bucket.new(bucket_name)) count = wrapper.list_objects(25) puts "Listed #{count} objects." end run_demo if $PROGRAM_NAME == __FILE__
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Untuk API detailnya, lihat ListObjectsV2 di AWS SDK for Ruby APIReferensi.
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- Rust
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- SDKuntuk Rust
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catatan
Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode
. pub async fn list_objects(client: &Client, bucket: &str) -> Result<(), Error> { let mut response = client .list_objects_v2() .bucket(bucket.to_owned()) .max_keys(10) // In this example, go 10 at a time. .into_paginator() .send(); while let Some(result) = response.next().await { match result { Ok(output) => { for object in output.contents() { println!(" - {}", object.key().unwrap_or("Unknown")); } } Err(err) => { eprintln!("{err:?}") } } } Ok(()) }
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Untuk API detailnya, lihat ListObjectsV2 AWS
SDKuntuk API referensi Rust.
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- SAP ABAP
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- SDKuntuk SAP ABAP
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catatan
Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode
. TRY. oo_result = lo_s3->listobjectsv2( " oo_result is returned for testing purposes. " iv_bucket = iv_bucket_name ). MESSAGE 'Retrieved list of objects in S3 bucket.' TYPE 'I'. CATCH /aws1/cx_s3_nosuchbucket. MESSAGE 'Bucket does not exist.' TYPE 'E'. ENDTRY.
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Untuk API detailnya, lihat ListObjectsV2 AWS SDKuntuk SAP ABAP API referensi.
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- Swift
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- SDKuntuk Swift
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catatan
Ini adalah dokumentasi prarilis untuk rilis SDK dalam pratinjau. Dokumentasi ini dapat berubah.
catatan
Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode
. public func listBucketFiles(bucket: String) async throws -> [String] { let input = ListObjectsV2Input( bucket: bucket ) let output = try await client.listObjectsV2(input: input) var names: [String] = [] guard let objList = output.contents else { return [] } for obj in objList { if let objName = obj.key { names.append(objName) } } return names }
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Untuk API detailnya, lihat ListObjectsV2 AWS
SDKuntuk API referensi Swift.
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Untuk daftar lengkap panduan AWS SDK pengembang dan contoh kode, lihatMenggunakan layanan ini dengan AWS SDK. Topik ini juga mencakup informasi tentang memulai dan detail tentang SDK versi sebelumnya.