对象存储 OSSURL签名授权

详细解答可以参考官方帮助文档

可以通过生成签名URL的形式提供给用户一个临时的访问URL。在生成URL时，可以指定URL过期的时间，从而限制用户长时间访问。

生成签名url

通过oss_gen_signed_url接口生成请求url签名。

生成下载请求的url签名

aos_pool_t *p;
oss_request_options_t *options;
aos_http_request_t *req;
char *url_str;
char *bucket_name = "<您的bucket名字>";
char *object_name = "<您的object名字>";
aos_string_t bucket;
aos_string_t object;
apr_time_t now;
int64_t expire_time; 
int one_hour = 3600; /* 单位：秒*/
aos_pool_create(&p, NULL);
/* 创建并初始化options */
options = oss_request_options_create(p);
init_options(options);
/* 初始化参数 */
aos_str_set(&bucket, bucket_name);
aos_str_set(&object, object_name);
req = aos_http_request_create(p);
req->method = HTTP_GET;
now = apr_time_now(); //millisecond
expire_time = now / 1000000 + one_hour;
/* 生成签名url */
url_str = oss_gen_signed_url(options, &bucket, &object, expire_time, req);
printf("临时下载url:%s\n", url_str);
aos_pool_destroy(p);

生成上传文件请求的url签名：

aos_pool_t *p;
oss_request_options_t *options;
aos_http_request_t *req;
char *bucket_name = "<您的bucket名字>";
char *object_name = "<您的object名字>";
aos_string_t bucket;
aos_string_t object;
apr_time_t now;
int64_t expire_time; 
int one_hour = 3600;
char *url_str = NULL;
aos_pool_create(&p, NULL);
/* 创建并初始化options */
options = oss_request_options_create(p);
init_options(options);
/* 初始化参数 */
aos_str_set(&bucket, bucket_name);
aos_str_set(&object, object_name);
req = aos_http_request_create(p);
req->method = HTTP_PUT;
now = apr_time_now(); //millisecond
expire_time = now / 1000000 + one_hour;
/* 生成签名url */
url_str = oss_gen_signed_url((options, &bucket, &object, expire_time, req);
printf("临时上传url:%s\n", url_str);
aos_pool_destroy(p);

使用签名URL下载文件

aos_pool_t *p;
oss_request_options_t *options;
aos_http_request_t *req;
aos_table_t *headers;
aos_table_t *resp_headers;
char *bucket_name = "<您的bucket名字>";
char *object_name = "<您的object名字>";
char *filepath = "<本地文件路径>";
aos_string_t bucket;
aos_string_t object;
aos_string_t file;
char *url_str;
apr_time_t now;
int64_t expire_time; 
int one_hour = 3600;
aos_pool_create(&p, NULL);
/* 创建并初始化options */
options = oss_request_options_create(p);
init_options(options);
/* 初始化参数 */
aos_str_set(&bucket, bucket_name);
aos_str_set(&object, object_name);
aos_str_set(&file, filepath);
headers = aos_table_make(p, 0);
req = aos_http_request_create(p);
req->method = HTTP_GET;
now = apr_time_now();  /* 单位：微秒 */
expire_time = now / 1000000 + one_hour;
/* 生成签名url */
url_str = oss_gen_signed_url(options, &bucket, &object, expire_time, req);
/* 使用签名url下载文件 */
s = oss_get_object_to_file_by_url(options, url_str, headers, &file, &resp_headers);
if (aos_status_is_ok(s)) {
    printf("get object succeeded\n");
} else {
    printf("get object failed\n");
}
aos_pool_destroy(p);

使用URL签名的方式上传文件

aos_pool_t *p;
int is_oss_domain = 1;//是否使用三级域名
oss_request_options_t *options;
aos_http_request_t *req;
aos_table_t *headers;
aos_table_t *resp_headers;
char *bucket_name = "<您的bucket名字>";
char *object_name = "<您的object名字>";
char *filepath = "<本地文件路径>";
aos_string_t bucket;
aos_string_t object;
aos_string_t file;
char *url_str;
apr_time_t now;
int64_t expire_time; 
int one_hour = 3600;
aos_pool_create(&p, NULL);
/* 创建并初始化options */
options = oss_request_options_create(p);
init_options(options);
/* 初始化参数 */
aos_str_set(&bucket, bucket_name);
aos_str_set(&object, object_name);
aos_str_set(&file, filepath);
headers = aos_table_make(p, 0);
req = aos_http_request_create(p);
req->method = HTTP_PUT;
now = apr_time_now(); /* 单位：微秒*/
expire_time = now / 1000000 + one_hour;
/* 生成签名url */
url_str = oss_gen_signed_url(options, &bucket, &object, expire_time, req);
/* 使用签名url上传文件 */
s = oss_put_object_from_file_by_url(options, url_str, &file, headers, &resp_headers);
if (aos_status_is_ok(s)) {
    printf("put objects by signed url succeeded\n");
} else {
    printf("put objects by signed url failed\n");
}
aos_pool_destroy(p);