Eliminazione di un singolo oggetto

L'esempio seguente presuppone che il bucket non sia abilitato al controllo delle versioni e che l'oggetto non abbia alcuna versione. IDs Nella richiesta di eliminazione, si specifica solo la chiave dell'oggetto e non un ID versione.

Per istruzioni su come creare e testare un esempio funzionante, consulta Getting Started nella Developer Guide. AWS SDK for Java

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();
        }
    }
}

Nell'esempio seguente viene eliminato un oggetto da un bucket con versione. L'esempio elimina una specifica versione dell'oggetto, specificando il nome della chiave dell'oggetto e l'ID versione.

Inoltre, vengono effettuate le seguenti operazioni:

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();
        }
    }
}

Nell'esempio di codice C# seguente viene eliminato un oggetto da un bucket senza versione. L'esempio presuppone che gli oggetti non abbiano una versione IDs, quindi non viene specificata la versione IDs. Specifichi solo la chiave dell'oggetto.

Per informazioni sulla configurazione e l'esecuzione degli esempi di codice, consulta Getting Started with the AWS SDK for .NET nella 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);
            }
        }
    }
}

Nell'esempio C# seguente viene eliminato un oggetto da un bucket con versione. Elimina una specifica versione dell'oggetto, specificando il nome della chiave dell'oggetto e l'ID versione.

Il codice esegue le attività sotto elencate:

Per informazioni sulla configurazione e l'esecuzione degli esempi di codice, consulta Getting Started with the AWS SDK for .NET nella 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;
        }
    }
}