Checking Whether a Bucket Exists

If you have any questions during development, post them on the Issues page of GitHub.

You can call obs_head_bucket to identify whether a bucket exists.

Parameter Description

Field	Type	Mandatory or Optional	Description
option	The context of the bucket. For details, see Configuring option.	Mandatory	Bucket parameter
handler	obs_response_handler *	Mandatory	Callback function
callback_data	void *	Optional	Callback data

Sample Code

static void test_head_bucket(char *bucket_name)
{
    // Create and initialize option.
    obs_status ret_status = OBS_STATUS_BUTT;
    obs_options option;
    init_obs_options(&option);

    option.bucket_options.host_name = "<your-endpoint>";
    option.bucket_options.bucket_name = "<Your bucketname>";

// Hard-coded or plaintext AK/SK are risky. For security purposes, encrypt your AK/SK and store them in the configuration file or environment variables. In this example, the AK/SK are stored in environment variables for identity authentication. Before running this example, configure environment variables ACCESS_KEY_ID and SECRET_ACCESS_KEY.
    // Obtain an AK/SK pair on the management console. For details, see https://support.huaweicloud.com/eu/usermanual-ca/ca_01_0003.html.
    option.bucket_options.access_key = getenv("ACCESS_KEY_ID");
    option.bucket_options.secret_access_key = getenv("SECRET_ACCESS_KEY");
    // Set response callback function.
    obs_response_handler response_handler =
    { 
        0, &response_complete_callback
    };
    // Check whether a bucket exists.
    obs_head_bucket(&option, &response_handler, &ret_status);

    if (ret_status == OBS_STATUS_OK) 
    {
        printf("head bucket successfully. \n");
    }
    else 
    {
        printf("head bucket failed(%s).\n", obs_get_status_name(ret_status));
    }
}