Manage buckets

Create a bucket

OSSCreateBucketRequest * create = [OSSCreateBucketRequest new];
create.bucketName = @"<bucketName>";
create.xOssACL = @"public-read";
create.location = @"oss-cn-hangzhou";
OSSTask * createTask = [client createBucket:create];
[createTask continueWithBlock:^id(OSSTask *task) {
    if (!task.error) {
        NSLog(@"create bucket success!");
    } else {
        NSLog(@"create bucket failed, error: %@", task.error);
    }
    return nil;
}];

The preceding code specifies the ACL and data center for the created bucket.

• Each user can have a maximum 30 buckets.

• The name of each bucket is globally unique. If the name of a newly created bucket is the same as an in-service bucket belonging to another user, the creation fails.

• When you create a bucket, you can configure the bucket ACL. If no ACL is configured, the bucket permission is private, by default.

• The result of successful bucket creation is returned to the data center where the bucket is located.

List all buckets

OSSGetServiceRequest * getService = [OSSGetServiceRequest new];
OSSTask * getServiceTask = [client getService:getService];
[getServiceTask continueWithBlock:^id(OSSTask *task) {
    if (!task.error) {
        OSSGetServiceResult * result = task.result;
        NSLog(@"buckets: %@", result.buckets);
        NSLog(@"owner: %@, %@", result.ownerId, result.ownerDispName);
        [result.buckets enumerateObjectsUsingBlock:^(id  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
            NSDictionary * bucketInfo = obj;
            NSLog(@"BucketName: %@", [bucketInfo objectForKey:@"Name"]);
            NSLog(@"CreationDate: %@", [bucketInfo objectForKey:@"CreationDate"]);
            NSLog(@"Location: %@", [bucketInfo objectForKey:@"Location"]);
        }];
    }
    return nil;
}];

The preceding code returns all buckets of the requester.

Note: Anonymous users do not have the permission to perform the LIST operation.

List all objects in a bucket

OSSGetBucketRequest * getBucket = [OSSGetBucketRequest new];
getBucket.bucketName = @"<bucketName>";
// getBucket.marker = @"";
// getBucket.prefix = @"";
// getBucket.delimiter = @"";
OSSTask * getBucketTask = [client getBucket:getBucket];
[getBucketTask continueWithBlock:^id(OSSTask *task) {
    if (!task.error) {
        OSSGetBucketResult * result = task.result;
        NSLog(@"get bucket success!");
        for (NSDictionary * objectInfo in result.contents) {
            NSLog(@"list object: %@", objectInfo);
        }
    } else {
        NSLog(@"get bucket failed, error: %@", task.error);
    }
    return nil;
}];

The preceding code lists all objects in a bucket.

• To list all objects in a bucket, you must have the permission to access the bucket.

• You can set parameter prefix, marker, delimiter, and max-keys for listing to return the expected results only.

Delete a bucket

OSSDeleteBucketRequest * delete = [OSSDeleteBucketRequest new];
delete.bucketName = @"<bucketName>";
OSSTask * deleteTask = [client deleteBucket:delete];
[deleteTask continueWithBlock:^id(OSSTask *task) {
    if (!task.error) {
        NSLog(@"delete bucket success!");
    } else {
        NSLog(@"delete bucket failed, error: %@", task.error);
    }
    return nil;
}];

The preceding code deletes a bucket.

• Only the bucket owner has the permission to delete the bucket.

• To prevent accidental deletion, OSS does not allow users to delete a non-empty bucket.