Löschen eines einzelnen Objekts

Im folgenden Beispiel wird davon ausgegangen, dass der Bucket nicht versionierungsfähig ist und das Objekt keine Version hat. IDs In der Löschanfrage geben Sie nur den Objektschlüssel und keine Versions-ID an.

Anweisungen zum Erstellen und Testen eines funktionierenden Beispiels finden Sie unter Erste Schritte im AWS SDK für Java Entwicklerhandbuch.

import com.amazonaws.AmazonServiceException;
import com.amazonaws.SdkClientException;
import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3ClientBuilder;
import com.amazonaws.services.s3.model.DeleteObjectRequest;

import java.io.IOException;

public class DeleteObjectNonVersionedBucket {

    public static void main(String[] args) throws IOException {
        Regions clientRegion = Regions.DEFAULT_REGION;
        String bucketName = "*** Bucket name ***";
        String keyName = "*** Key name ****";

        try {
            AmazonS3 s3Client = AmazonS3ClientBuilder.standard()
                    .withCredentials(new ProfileCredentialsProvider())
                    .withRegion(clientRegion)
                    .build();

            s3Client.deleteObject(new DeleteObjectRequest(bucketName, keyName));
        } catch (AmazonServiceException e) {
            // The call was transmitted successfully, but Amazon S3 couldn't process
            // it, so it returned an error response.
            e.printStackTrace();
        } catch (SdkClientException e) {
            // Amazon S3 couldn't be contacted for a response, or the client
            // couldn't parse the response from Amazon S3.
            e.printStackTrace();
        }
    }
}

Das folgende Beispiel löscht ein Objekt aus einem versionierten Bucket. Das Beispiel löscht eine spezifische Objektversion durch Angabe des Namens des Objektschlüssels und der Versions-ID.

Das Beispiel erledigt Folgendes:

import com.amazonaws.AmazonServiceException;
import com.amazonaws.SdkClientException;
import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3ClientBuilder;
import com.amazonaws.services.s3.model.BucketVersioningConfiguration;
import com.amazonaws.services.s3.model.DeleteVersionRequest;
import com.amazonaws.services.s3.model.PutObjectResult;

import java.io.IOException;

public class DeleteObjectVersionEnabledBucket {

    public static void main(String[] args) throws IOException {
        Regions clientRegion = Regions.DEFAULT_REGION;
        String bucketName = "*** Bucket name ***";
        String keyName = "*** Key name ****";

        try {
            AmazonS3 s3Client = AmazonS3ClientBuilder.standard()
                    .withCredentials(new ProfileCredentialsProvider())
                    .withRegion(clientRegion)
                    .build();

            // Check to ensure that the bucket is versioning-enabled.
            String bucketVersionStatus = s3Client.getBucketVersioningConfiguration(bucketName).getStatus();
            if (!bucketVersionStatus.equals(BucketVersioningConfiguration.ENABLED)) {
                System.out.printf("Bucket %s is not versioning-enabled.", bucketName);
            } else {
                // Add an object.
                PutObjectResult putResult = s3Client.putObject(bucketName, keyName,
                        "Sample content for deletion example.");
                System.out.printf("Object %s added to bucket %s\n", keyName, bucketName);

                // Delete the version of the object that we just created.
                System.out.println("Deleting versioned object " + keyName);
                s3Client.deleteVersion(new DeleteVersionRequest(bucketName, keyName, putResult.getVersionId()));
                System.out.printf("Object %s, version %s deleted\n", keyName, putResult.getVersionId());
            }
        } catch (AmazonServiceException e) {
            // The call was transmitted successfully, but Amazon S3 couldn't process
            // it, so it returned an error response.
            e.printStackTrace();
        } catch (SdkClientException e) {
            // Amazon S3 couldn't be contacted for a response, or the client
            // couldn't parse the response from Amazon S3.
            e.printStackTrace();
        }
    }
}

Das folgende C#-Beispiel löscht ein Objekt aus einem nicht-versionierten Bucket. In dem Beispiel wird davon ausgegangen, dass die Objekte keine Version haben IDs, sodass Sie keine Version angeben IDs. Sie geben nur den Objektschlüssel ein.

Informationen zum Einrichten und Ausführen der Codebeispiele finden Sie unter Getting Started with the AWS SDK for .NET im AWS SDK for .NET Developer Guide.

using Amazon;
using Amazon.S3;
using Amazon.S3.Model;
using System;
using System.Threading.Tasks;

namespace Amazon.DocSamples.S3
{
    class DeleteObjectNonVersionedBucketTest
    {
        private const string bucketName = "*** bucket name ***"; 
        private const string keyName = "*** object key ***";
        // Specify your bucket region (an example region is shown).
        private static readonly RegionEndpoint bucketRegion = RegionEndpoint.USWest2;
        private static IAmazonS3 client;

        public static void Main()
        {
            client = new AmazonS3Client(bucketRegion);
            DeleteObjectNonVersionedBucketAsync().Wait();
        }
        private static async Task DeleteObjectNonVersionedBucketAsync()
        {
            try
            {
                var deleteObjectRequest = new DeleteObjectRequest
                {
                    BucketName = bucketName,
                    Key = keyName
                };

                Console.WriteLine("Deleting an object");
                await client.DeleteObjectAsync(deleteObjectRequest);
            }
            catch (AmazonS3Exception e)
            {
                Console.WriteLine("Error encountered on server. Message:'{0}' when deleting an object", e.Message);
            }
            catch (Exception e)
            {
                Console.WriteLine("Unknown encountered on server. Message:'{0}' when deleting an object", e.Message);
            }
        }
    }
}

Das folgende C#-Beispiel löscht ein Objekt aus einem versionierten Bucket. Es löscht eine bestimmte Objektversion durch Angabe des Namens des Objektschlüssels und der Versions-ID.

Der Code führt die folgenden Aufgaben durch:

Informationen zum Einrichten und Ausführen der Codebeispiele finden Sie unter Getting Started with the AWS SDK for .NET im AWS SDK for .NET Developer Guide.

using Amazon;
using Amazon.S3;
using Amazon.S3.Model;
using System;
using System.Threading.Tasks;

namespace Amazon.DocSamples.S3
{
    class DeleteObjectVersion
    {
        private const string bucketName = "*** versioning-enabled bucket name ***";
        private const string keyName = "*** Object Key Name ***";
        // Specify your bucket region (an example region is shown).
        private static readonly RegionEndpoint bucketRegion = RegionEndpoint.USWest2;
        private static IAmazonS3 client;

        public static void Main()
        {
            client = new AmazonS3Client(bucketRegion);
            CreateAndDeleteObjectVersionAsync().Wait();
        }

        private static async Task CreateAndDeleteObjectVersionAsync()
        {
            try
            {
                // Add a sample object. 
                string versionID = await PutAnObject(keyName);

                // Delete the object by specifying an object key and a version ID.
                DeleteObjectRequest request = new DeleteObjectRequest
                {
                    BucketName = bucketName,
                    Key = keyName,
                    VersionId = versionID
                };
                Console.WriteLine("Deleting an object");
                await client.DeleteObjectAsync(request);
            }
            catch (AmazonS3Exception e)
            {
                Console.WriteLine("Error encountered on server. Message:'{0}' when deleting an object", e.Message);
            }
            catch (Exception e)
            {
                Console.WriteLine("Unknown encountered on server. Message:'{0}' when deleting an object", e.Message);
            }
        }

        static async Task<string> PutAnObject(string objectKey)
        {
            PutObjectRequest request = new PutObjectRequest
            {
                BucketName = bucketName,
                Key = objectKey,
                ContentBody = "This is the content body!"
            };
            PutObjectResponse response = await client.PutObjectAsync(request);
            return response.VersionId;
        }
    }
}