std::string GetObjectUrl(const std::string& bucket, const std::string& object, bool https = true, const std::string& region);

qcloud_cos::CosConfig config("./config.json");
qcloud_cos::CosAPI cos(config);

std::string bucket_name = "examplebucket-1250000000"; // 替换为用户的存储桶名，由bucketname-appid 组成，appid必须填入，可以在COS控制台查看存储桶名称：https://console.tencentcloud.com/cos5/bucket
std::string object_name = "exampleobject";
//获取对象https url，region为config.json中配置的地域
cos.GetObjectUrl(bucket_name, object_name);
//获取对象http url，region为config.json中配置的地域
cos.GetObjectUrl(bucket_name, object_name, false);
//获取对象https url, region为ap-shanghai
std::string object_url = cos.GetObjectUrl(bucket_name, object_name, true, "ap-shanghai");