获取镜像回源规则(C SDK)

以下示例展示如何获取桶镜像回源规则配置：

#include "eSDKOBS.h"
#include <stdio.h>
#include <string.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_mirror_back_to_source_callback(obs_mirror_back_to_source_rule *mirror_back_to_source_rules_return,
    unsigned int rule_number, void *callback_data);
typedef struct MirrorBackInfo {
    unsigned int rule_count;
    obs_status ret_status;
} MirrorBackInfo;
int main()
{
    obs_initialize(OBS_INIT_ALL);
    obs_options options;
    init_obs_options(&options);
    // host_name填写桶所在的endpoint, 此处以中国-香港为例，其他地区请按实际情况填写。
    options.bucket_options.host_name = "obs.ap-southeast-1.myhuaweicloud.com";
    // 认证用的ak和sk硬编码到代码中或者明文存储都有很大的安全风险，建议在配置文件或者环境变量中密文存放，使用时解密，确保安全；
    // 本示例以ak和sk保存在环境变量中为例，运行本示例前请先在本地环境中设置环境变量ACCESS_KEY_ID和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_mirror_back_to_source_handler get_mirror_handler = {
        response_handler,
        &get_mirror_back_to_source_callback
    };
    MirrorBackInfo mirror_info = {0};
    mirror_info.ret_status = OBS_STATUS_BUTT;
    get_bucket_mirror_back_to_source(&options, &get_mirror_handler, &mirror_info);
    if (OBS_STATUS_OK == mirror_info.ret_status) {
        printf("get bucket mirror back to source successfully. rule_count: %u\n", mirror_info.rule_count);
    } else {
        printf("get bucket mirror back to source failed(%s).\n", obs_get_status_name(mirror_info.ret_status));
    }
    obs_deinitialize();
}
obs_status get_mirror_back_to_source_callback(obs_mirror_back_to_source_rule *mirror_back_to_source_rules_return,
    unsigned int rule_number, void *callback_data)
{
    MirrorBackInfo *info = (MirrorBackInfo *)callback_data;
    info->rule_count = rule_number;
    if (mirror_back_to_source_rules_return) {
        unsigned int i;
        for (i = 0; i < rule_number; i++) {
            obs_mirror_back_to_source_rule *rule = &mirror_back_to_source_rules_return[i];
            printf("rule[%u]: id=%s, agency=%s\n",
                i,
                rule->id ? rule->id : "",
                rule->redirect.agency ? rule->redirect.agency : "");
        }
    }
    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) { ((MirrorBackInfo*)callback_data)->ret_status = status; }
    if (error && error->message) { printf("Error: %s\n", error->message); }
}