This topic describes how to copy an object from a source bucket to a destination bucket within the same region. The source bucket and the destination bucket can be the same or different buckets.
Copy a small-sized object
You must note the following limits before copy a small-sized object:
- The user must have the read and write permission on the source object.
- You cannot copy an object from a region to another region. For example, you cannot copy an object from a bucket in Hangzhou region to a bucket in Qingdao.
- The object size must be smaller than 1 GB.
Run the following code to copy a small-sized object:
#include "oss_api.h"
#include "aos_http_io.h"
const char *endpoint = "<yourEndpoint>";
const char *access_key_id = "<yourAccessKeyId>";
const char *access_key_secret = "<yourAccessKeySecret>";
const char *bucket_name = "<yourBucketName>";
const char *object_name = "<yourObjectName>";
const char *source_bucket_name = "<yourSourceBucketName>";
const char *source_object_name = "<yourSourceObjectName>";
const char *dest_bucket_name = "<yourDestBucketName>";
const char *dest_object_name = "<yourDestObjectName>";
void init_options(oss_request_options_t *options)
{
options->config = oss_config_create(options->pool);
/* Use a char* string to initialize aos_string_t. */
aos_str_set(&options->config->endpoint, endpoint);
aos_str_set(&options->config->access_key_id, access_key_id);
aos_str_set(&options->config->access_key_secret, access_key_secret);
/* Determine whether the CNAME is used. 0 indicates that the CNAME is not used. */
options->config->is_cname = 0;
/* Used to configure network parameters, such as timeout. */
options->ctl = aos_http_controller_create(options->pool, 0);
}
int main(int argc, char *argv[])
{
/* Call the aos_http_io_initialize method in main() to initialize global resources, such as networks and memories. */
if (aos_http_io_initialize(NULL, 0) != AOSE_OK) {
exit(1);
}
/* Memory pool used to manage memories, which is equivalent to apr_pool_t. The implementation code is included in the apr library. */
aos_pool_t *pool;
/* Re-create a new memory pool. The second parameter is NULL, indicating that it does not inherit from any other memory pools. */
aos_pool_create(&pool, NULL);
/* Create and initialize options. This parameter mainly includes global configuration information, such as endpoint, access_key_id, acces_key_secret, is_cname, and curl. */
oss_request_options_t *oss_client_options;
/* Allocate memories in the memory pool to options. */
oss_client_options = oss_request_options_create(pool);
/* Use oss_client_options to initialize client options. */
init_options(oss_client_options);
/* Initialization parameters. */
aos_string_t source_bucket;
aos_string_t source_object;
aos_string_t dest_bucket;
aos_string_t dest_object;
aos_table_t *headers = NULL;
aos_table_t *resp_headers = NULL;
aos_status_t *resp_status = NULL;
aos_str_set(&source_bucket, source_bucket_name);
aos_str_set(&source_object, source_object_name);
aos_str_set(&dest_bucket, dest_bucket_name);
aos_str_set(&dest_object, dest_object_name);
headers = aos_table_make(pool, 0);
/* Copy an object. */
resp_status = oss_copy_object(oss_client_options, &source_bucket, &source_object, &dest_bucket, &dest_object, headers, &resp_headers);
if (aos_status_is_ok(resp_status)) {
printf("copy object succeeded\n");
} else {
printf("copy object failed\n");
}
/* Release the memory pool, that is, memories allocated to resources during the request. */
aos_pool_destroy(pool);
/* Release the allocated global resources. */
aos_http_io_deinitialize();
return 0;
}
Copy a large-sized object
For objects larger than 1 GB, we recommend that you should use oss_upload_part_copy to perform multipart copy (UploadPartCopy). Run the following code for multipart copy:
#include "oss_api.h"
#include "aos_http_io.h"
#include <sys/stat.h>
const char *endpoint = "<yourEndpoint>";
const char *access_key_id = "<yourAccessKeyId>";
const char *access_key_secret = "<yourAccessKeySecret>";
const char *source_bucket_name = "<yourSourceBucketName>";
const char *source_object_name = "<yourSourceObjectName>";
const char *dest_bucket_name = "<yourDestBucketName>";
const char *dest_object_name = "<yourDestObjectName>";
const char *local_filename = "<yourLocalFilename>";
void init_options(oss_request_options_t *options)
{
options->config = oss_config_create(options->pool);
/* Use a char* string to initialize aos_string_t. */
aos_str_set(&options->config->endpoint, endpoint);
aos_str_set(&options->config->access_key_id, access_key_id);
aos_str_set(&options->config->access_key_secret, access_key_secret);
/* Determine whether the CNAME is used. 0 indicates that the CNAME is not used. */
options->config->is_cname = 0;
/* Used to configure network parameters, such as timeout. */
options->ctl = aos_http_controller_create(options->pool, 0);
}
int64_t get_file_size(const char *file_path)
{
int64_t filesize = -1;
struct stat statbuff;
if(stat(file_path, &statbuff) < 0){
return filesize;
} else {
filesize = statbuff.st_size;
}
return filesize;
}
int main(int argc, char *argv[])
{
/* Call the aos_http_io_initialize method in main() to initialize global resources, such as networks and memories. */
if (aos_http_io_initialize(NULL, 0) != AOSE_OK) {
exit(1);
}
/* Memory pool used to manage memories, which is equivalent to apr_pool_t. The implementation code is included in the apr library. */
aos_pool_t *pool;
/* Re-create a new memory pool. The second parameter is NULL, indicating that it does not inherit from any other memory pools. */
aos_pool_create(&pool, NULL);
/* Create and initialize options. This parameter mainly includes global configuration information, such as endpoint, access_key_id, acces_key_secret, is_cname, and curl. */
oss_request_options_t *oss_client_options;
/* Allocate memories in the memory pool to options. */
oss_client_options = oss_request_options_create(pool);
/* Use oss_client_options to initialize client options. */
init_options(oss_client_options);
/* Initialization parameters. */
aos_string_t dest_bucket;
aos_string_t dest_object;
aos_string_t upload_id;
aos_table_t *headers = NULL;
aos_table_t *resp_headers = NULL;
aos_status_t *resp_status = NULL;
oss_list_upload_part_params_t *list_upload_part_params;
oss_upload_part_copy_params_t *upload_part_copy_params1;
oss_upload_part_copy_params_t *upload_part_copy_params2;
oss_list_part_content_t *part_content;
aos_list_t complete_part_list;
oss_complete_part_content_t *complete_content;
aos_table_t *list_part_resp_headers = NULL;
aos_table_t *complete_resp_headers = NULL;
int part1 = 1;
int part2 = 2;
int64_t range_start1 = 0;
int64_t range_end1 = 6000000;//not less than 5MB
int64_t range_start2 = 6000001;
int64_t range_end2;
int max_ret = 1000;
headers = aos_table_make(pool, 0);
aos_str_set(&dest_bucket, dest_bucket_name);
aos_str_set(&dest_object, dest_object_name);
resp_status = oss_init_multipart_upload(oss_client_options, &dest_bucket, &dest_object, &upload_id, headers, &resp_headers);
if (aos_status_is_ok(resp_status)) {
printf("init multipart upload succeeded, upload_id is %s\n", upload_id.data);
} else {
printf("init multipart upload failed\n");
}
/* Copy the first part of the object. */
upload_part_copy_params1 = oss_create_upload_part_copy_params(pool);
aos_str_set(&upload_part_copy_params1->source_bucket, source_bucket_name);
aos_str_set(&upload_part_copy_params1->source_object, source_object_name);
aos_str_set(&upload_part_copy_params1->dest_bucket, dest_bucket_name);
aos_str_set(&upload_part_copy_params1->dest_object, dest_object_name);
aos_str_set(&upload_part_copy_params1->upload_id, upload_id.data);
upload_part_copy_params1->part_num = part1;
upload_part_copy_params1->range_start = range_start1;
upload_part_copy_params1->range_end = range_end1;
headers = aos_table_make(pool, 0);
resp_status = oss_upload_part_copy(oss_client_options, upload_part_copy_params1, headers, &resp_headers);
if (aos_status_is_ok(resp_status)) {
printf("upload part 1 copy succeeded\n");
} else {
printf("upload part 1 copy failed\n");
}
/* Copy the second part of the object. */
range_end2 = get_file_size(local_filename) - 1;
upload_part_copy_params2 = oss_create_upload_part_copy_params(pool);
aos_str_set(&upload_part_copy_params2->source_bucket, source_bucket_name);
aos_str_set(&upload_part_copy_params2->source_object, source_object_name);
aos_str_set(&upload_part_copy_params2->dest_bucket, dest_bucket_name);
aos_str_set(&upload_part_copy_params2->dest_object, dest_object_name);
aos_str_set(&upload_part_copy_params2->upload_id, upload_id.data);
upload_part_copy_params2->part_num = part2;
upload_part_copy_params2->range_start = range_start2;
upload_part_copy_params2->range_end = range_end2;
headers = aos_table_make(pool, 0);
resp_status = oss_upload_part_copy(oss_client_options, upload_part_copy_params2, headers, &resp_headers);
if (aos_status_is_ok(resp_status)) {
printf("upload part 2 copy succeeded\n");
} else {
printf("upload part 2 copy failed\n");
}
/* Lists the parts. */
headers = aos_table_make(pool, 0);
list_upload_part_params = oss_create_list_upload_part_params(pool);
list_upload_part_params->max_ret = max_ret;
aos_list_init(&complete_part_list);
resp_status = oss_list_upload_part(oss_client_options, &dest_bucket, &dest_object, &upload_id, list_upload_part_params, &list_part_resp_headers);
aos_list_for_each_entry(oss_list_part_content_t, part_content, &list_upload_part_params->part_list, node) {
complete_content = oss_create_complete_part_content(pool);
aos_str_set(&complete_content->part_number, part_content->part_number.data);
aos_str_set(&complete_content->etag, part_content->etag.data);
aos_list_add_tail(&complete_content->node, &complete_part_list);
}
/* Complete the multipart copy. */
resp_status = oss_complete_multipart_upload(oss_client_options, &dest_bucket, &dest_object, &upload_id, &complete_part_list, headers, &complete_resp_headers);
if (aos_status_is_ok(resp_status)) {
printf("complete multipart upload succeeded\n");
} else {
printf("complete multipart upload failed\n");
}
/* Release the memory pool, that is, memories allocated to resources during the request. */
aos_pool_destroy(pool);
/* Release the allocated global resources. */
aos_http_io_deinitialize();
return 0;
}