Obtaining a DIS Notification Policy (SDK for C)

#include "eSDKOBS.h"
#include <stdio.h>
obs_status response_properties_callback(const obs_response_properties *properties, void *callback_data);
void response_complete_callback(obs_status status, const obs_error_details *error, void *callback_data);
obs_status get_dis_policy_callback(obs_dis_policy_rule *dis_policy_rules_return,
    unsigned int rule_number, void *callback_data);
typedef struct DisPolicyInfo {
    obs_status ret_status;
} DisPolicyInfo;
int main()
{
    obs_initialize(OBS_INIT_ALL);
    obs_options options;
    init_obs_options(&options);
    // Enter the endpoint corresponding to the bucket for host_name. CN-Hong Kong is used here as an example. Replace it with the one currently in use.
    options.bucket_options.host_name = "obs.ap-southeast-1.myhuaweicloud.com";
    // Hard-coded or plaintext AK and SK are risky. For security purposes, encrypt your AK and SK and store them in the configuration file or environment variables.
    // In this example, the AK and SK are stored in environment variables for identity authentication. Before running the code in this example, configure local environment variables ACCESS_KEY_ID and SECRET_ACCESS_KEY.
    options.bucket_options.access_key = getenv("ACCESS_KEY_ID");
    options.bucket_options.secret_access_key = getenv("SECRET_ACCESS_KEY");
    options.bucket_options.bucket_name = "example-bucket-name";
    obs_response_handler response_handler = {&response_properties_callback, &response_complete_callback};
    obs_get_bucket_dis_policy_handler get_dis_policy_handler = {
        response_handler,
        &get_dis_policy_callback
    };
    DisPolicyInfo dis_policy_info = {0};
    dis_policy_info.ret_status = OBS_STATUS_BUTT;
    // Obtain the DIS notification policy of a bucket.
    get_bucket_dis_policy(&options, &get_dis_policy_handler, &dis_policy_info);
    if (OBS_STATUS_OK == dis_policy_info.ret_status) {
        printf("get bucket dis policy successfully.\n");
    } else {
        printf("get bucket dis policy failed(%s).\n", obs_get_status_name(dis_policy_info.ret_status));
    }
    obs_deinitialize();
}
obs_status get_dis_policy_callback(obs_dis_policy_rule *dis_policy_rules_return,
    unsigned int rule_number, void *callback_data)
{
    if (dis_policy_rules_return) {
        unsigned int i;
        for (i = 0; i < rule_number; i++) {
            printf("rule[%u] id: %s\n", i, dis_policy_rules_return[i].id ? dis_policy_rules_return[i].id : "");
            printf("rule[%u] stream: %s\n", i, dis_policy_rules_return[i].stream ? dis_policy_rules_return[i].stream : "");
            printf("rule[%u] events_number: %u\n", i, dis_policy_rules_return[i].events_number);
        }
    }
    return OBS_STATUS_OK;
}
obs_status response_properties_callback(const obs_response_properties *properties, void *callback_data)
{
    (void)properties; (void)callback_data;
    return OBS_STATUS_OK;
}
void response_complete_callback(obs_status status, const obs_error_details *error, void *callback_data)
{
    if (callback_data) { ((DisPolicyInfo*)callback_data)->ret_status = status; }
    if (error && error->message) { printf("Error: %s\n", error->message); }
}