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Com.amazonaws.services.s3.model.AmazonS3Exception: user key must be specified

com.amazonaws.services.s3.model.AmazonS3Exception: User key must be specified. (Service: Amazon S3; Status Code: 400;
       at com.amazonaws.http.AmazonHttpClient.handleErrorResponse(AmazonHttpClient.java:1160)
       at com.amazonaws.http.AmazonHttpClient.executeOneRequest(AmazonHttpClient.java:748)
       at com.amazonaws.http.AmazonHttpClient.executeHelper(AmazonHttpClient.java:467)
       at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:302)
       at com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:3769)
       at com.amazonaws.services.s3.AmazonS3Client.deleteObjects(AmazonS3Client.java:1841)

The code is as follows:

client.deleteObjects(new DeleteObjectsRequest(bucketName).withKeys(keys.toArray(new String[urls.length]))

Access / secret keys are configured correctly.

What is a user key ?

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2 answers

What is a user key?

Ans:

A user key is a key by which a user can obtain credentials. It verifies who you are and whether you have permission to access the resources that you are requesting. User security credentials have Access Key IDand Secret Access Key.

. AWS; . , , . , , , AWS Amazon.com. , Amazon, - .

: http://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSGettingStartedGuide/AWSCredentials.html

client.deleteObjects(....); , . ArrayList proper exception handling.

( )

  • AmazonS3Client.

  • DeleteObjectsRequest list of objects keys , , .

    , , Amazon S3 deletes the specific object version. , , Amazon S3 adds a delete marker. . .

  • AmazonS3Client.deleteObjects.

Java .

List<KeyVersion> keys = new ArrayList<KeyVersion>();
// Provide a list of object keys and versions.

DeleteObjectsRequest multiObjectDeleteRequest = new DeleteObjectsRequest(bucketName)
.withKeys(keys);

try {
    DeleteObjectsResult delObjRes = s3Client.deleteObjects(multiObjectDeleteRequest);
    System.out.format("Successfully deleted all the %s items.\n", delObjRes.getDeletedObjects().size());

} catch (MultiObjectDeleteException e) {
    // Process exception.
}

( )

static void multiObjectNonVersionedDelete(List<KeyVersion> keys) {

    // Multi-object delete by specifying only keys (no version ID).
    DeleteObjectsRequest multiObjectDeleteRequest = new DeleteObjectsRequest(
            bucketName).withQuiet(false);

    // Create request that include only object key names.
    List<KeyVersion> justKeys = new ArrayList<KeyVersion>();
    for (KeyVersion key : keys) {
        justKeys.add(new KeyVersion(key.getKey()));
    }
    multiObjectDeleteRequest.setKeys(justKeys);
    // Execute DeleteObjects - Amazon S3 add delete marker for each object
    // deletion. The objects no disappear from your bucket (verify).
    DeleteObjectsResult delObjRes = null;
    try {
        delObjRes = s3Client.deleteObjects(multiObjectDeleteRequest);
        System.out.format("Successfully deleted all the %s items.\n", delObjRes.getDeletedObjects().size());
    } catch (MultiObjectDeleteException mode) {
        printDeleteResults(mode);
    }
}

. ,

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URL- , , , , , , ( ).

, :

client.deleteObjects(new DeleteObjectsRequest(bucketName)
    .withKeys(keys.toArray(new String[keys.length]))
--------------------------------------^^^^
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