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API | Operation | Description |
Querying objects | Queries some or all the objects in a bucket. |
cos_status_t *cos_list_object(const cos_request_options_t *options,const cos_string_t *bucket,cos_list_object_params_t *params,cos_table_t **resp_headers);
Parameter | Description | Type |
options | COS request options | Struct |
Bucket | Bucket name in the format of BucketName-APPID | String |
params | Parameters for the list operation | Struct |
encoding_type | Specifies the encoding type of the returned value | String |
prefix | Prefix to be matched, which is used to specify the prefix address of the files to be returned | String |
marker | Marks the starting point of the object list; by default, entries are listed in UTF-8 binary order starting from this marker | String |
delimiter | A query separator, used to group object keys | String |
max_ret | The maximum number of returned entries per request; the default value is 1000 | Struct |
truncated | Indicates whether the returned entry is truncated. Valid value: true or false | Boolean |
next_marker | Marks the starting point of the next entry if the returned entry is truncated | String |
object_list | Object list returned by the Get Bucket operation | Struct |
key | Name (key) of the object returned by the Get Bucket operation | Struct |
last_modified | The last modified time of the object returned by the Get Bucket operation | Struct |
etag | SHA-1 check value of the object returned by the Get Bucket operation | Struct |
size | The size in bytes of the object returned by the Get Bucket operation | Struct |
owner_id | UID of the owner of the object returned by the Get Bucket operation | Struct |
storage_class | The storage class of the object returned by the Get Bucket operation | Struct |
common_prefix_list | The identical paths between a particular prefix and the delimiter are grouped together and defined as a common prefix | Struct |
resp_headers | Returns the HTTP response headers | Struct |
Response Parameter | Description | Type |
code | Error code | Int |
error_code | Error code content | String |
error_msg | Error code description | String |
req_id | Request message ID | String |
#include "cos_http_io.h"#include "cos_api.h"#include "cos_log.h"// `endpoint` is the COS access domain name. For more information, see https://www.tencentcloud.com/document/product/436/6224.static char TEST_COS_ENDPOINT[] = "cos.ap-guangzhou.myqcloud.com";// A developer-owned secret ID/key used for the project. It can be obtained at https://console.tencentcloud.com/cam/capi.static char *TEST_ACCESS_KEY_ID; // Your SecretIdstatic char *TEST_ACCESS_KEY_SECRET; // Your SecretKey// A unique user-level resource identifier for COS access. It can be obtained at https://console.tencentcloud.com/cam/capi.static char TEST_APPID[] = "<APPID>"; // Your APPID// COS bucket name, in the format of [bucket]-[appid], for example `mybucket-1253666666`. It can be obtained at https://console.tencentcloud.com/cos5/bucket.static char TEST_BUCKET_NAME[] = "<bucketname-appid>";void init_test_config(cos_config_t *config, int is_cname){cos_str_set(&config->endpoint, TEST_COS_ENDPOINT);cos_str_set(&config->access_key_id, TEST_ACCESS_KEY_ID);cos_str_set(&config->access_key_secret, TEST_ACCESS_KEY_SECRET);cos_str_set(&config->appid, TEST_APPID);config->is_cname = is_cname;}void init_test_request_options(cos_request_options_t *options, int is_cname){options->config = cos_config_create(options->pool);init_test_config(options->config, is_cname);options->ctl = cos_http_controller_create(options->pool, 0);}void test_list_objects(){cos_pool_t *p = NULL;int is_cname = 0;cos_status_t *s = NULL;cos_request_options_t *options = NULL;cos_string_t bucket;cos_table_t *resp_headers = NULL;// Create a memory poolcos_pool_create(&p, NULL);// Initialize the request optionsoptions = cos_request_options_create(p);init_test_request_options(options, is_cname);cos_str_set(&bucket, TEST_BUCKET_NAME);// Get the object listcos_list_object_params_t *list_params = NULL;cos_list_object_content_t *content = NULL;list_params = cos_create_list_object_params(p);s = cos_list_object(options, &bucket, list_params, &resp_headers);if (cos_status_is_ok(s)) {printf("list object succeeded\\n");cos_list_for_each_entry(cos_list_object_content_t, content, &list_params->object_list, node) {printf("object: %.*s\\n", content->key.len, content->key.data);}} else {printf("list object failed\\n");}// Destroy the memory pool.cos_pool_destroy(p);}int main(int argc, char *argv[]){// Get SecretId and SecretKey from environment variablesTEST_ACCESS_KEY_ID = getenv("COS_SECRETID");TEST_ACCESS_KEY_SECRET = getenv("COS_SECRETKEY");if (cos_http_io_initialize(NULL, 0) != COSE_OK) {exit(1);}// Set the log level. Default value: `COS_LOG_WARN`cos_log_set_level(COS_LOG_WARN);// Set log output. Default value: `stderr`cos_log_set_output(NULL);test_list_objects();cos_http_io_deinitialize();return 0;}
#include "cos_http_io.h"#include "cos_api.h"#include "cos_log.h"// `endpoint` is the COS access domain name. For more information, see https://www.tencentcloud.com/document/product/436/6224.static char TEST_COS_ENDPOINT[] = "cos.ap-guangzhou.myqcloud.com";// A developer-owned secret ID/key used for the project. It can be obtained at https://console.tencentcloud.com/cam/capi.static char *TEST_ACCESS_KEY_ID; // Your SecretIdstatic char *TEST_ACCESS_KEY_SECRET; // Your SecretKey// A unique user-level resource identifier for COS access. It can be obtained at https://console.tencentcloud.com/cam/capi.static char TEST_APPID[] = "<APPID>"; // Your APPID// COS bucket name, in the format of [bucket]-[appid], for example `mybucket-1253666666`. It can be obtained at https://console.tencentcloud.com/cos5/bucket.static char TEST_BUCKET_NAME[] = "<bucketname-appid>";void init_test_config(cos_config_t *config, int is_cname){cos_str_set(&config->endpoint, TEST_COS_ENDPOINT);cos_str_set(&config->access_key_id, TEST_ACCESS_KEY_ID);cos_str_set(&config->access_key_secret, TEST_ACCESS_KEY_SECRET);cos_str_set(&config->appid, TEST_APPID);config->is_cname = is_cname;}void init_test_request_options(cos_request_options_t *options, int is_cname){options->config = cos_config_create(options->pool);init_test_config(options->config, is_cname);options->ctl = cos_http_controller_create(options->pool, 0);}void test_list_directory(){cos_pool_t *p = NULL;int is_cname = 0;cos_status_t *s = NULL;cos_request_options_t *options = NULL;cos_string_t bucket;cos_table_t *resp_headers;int is_truncated = 1;cos_string_t marker;cos_pool_create(&p, NULL);options = cos_request_options_create(p);init_test_request_options(options, is_cname);cos_str_set(&bucket, TEST_BUCKET_NAME);//list object (get bucket)cos_list_object_params_t *list_params = NULL;list_params = cos_create_list_object_params(p);// The prefix indicates that the key of the object to be listed must start with this valuecos_str_set(&list_params->prefix, "folder/");// Set the delimiter to "/" to list objects in the current directory. To list all objects, leave it empty.cos_str_set(&list_params->delimiter, "/");// Set the maximum number of traversed objects (up to 1,000 per listobject request)list_params->max_ret = 1000;cos_str_set(&marker, "");while (is_truncated) {list_params->marker = marker;s = cos_list_object(options, &bucket, list_params, &resp_headers);if (!cos_status_is_ok(s)) {printf("list object failed, req_id:%s\\n", s->req_id);break;}// `list_params->object_list` returns the following objectscos_list_object_content_t *content = NULL;cos_list_for_each_entry(cos_list_object_content_t, content, &list_params->object_list, node) {printf("object: %s\\n", content->key.data);}// `list_params->common_prefix_list` indicates paths that end with the delimiter. If the delimiter is set to "/", the common prefix indicates the paths of all subdirectories.cos_list_object_common_prefix_t *common_prefix = NULL;cos_list_for_each_entry(cos_list_object_common_prefix_t, common_prefix, &list_params->common_prefix_list, node) {printf("common prefix: %s\\n", common_prefix->prefix.data);}is_truncated = list_params->truncated;marker = list_params->next_marker;}cos_pool_destroy(p);}int main(int argc, char *argv[]){// Get SecretId and SecretKey from environment variablesTEST_ACCESS_KEY_ID = getenv("COS_SECRETID");TEST_ACCESS_KEY_SECRET = getenv("COS_SECRETKEY");if (cos_http_io_initialize(NULL, 0) != COSE_OK) {exit(1);}// Set the log level. Default value: `COS_LOG_WARN`cos_log_set_level(COS_LOG_WARN);// Set log output. Default value: `stderr`cos_log_set_output(NULL);test_list_directory();cos_http_io_deinitialize();return 0;}
#include "cos_http_io.h"#include "cos_api.h"#include "cos_log.h"// `endpoint` is the COS access domain name. For more information, see https://www.tencentcloud.com/document/product/436/6224.static char TEST_COS_ENDPOINT[] = "cos.ap-guangzhou.myqcloud.com";// A developer-owned secret ID/key used for the project. It can be obtained at https://console.tencentcloud.com/cam/capi.static char *TEST_ACCESS_KEY_ID; // Your SecretIdstatic char *TEST_ACCESS_KEY_SECRET; // Your SecretKey// A unique user-level resource identifier for COS access. It can be obtained at https://console.tencentcloud.com/cam/capi.static char TEST_APPID[] = "<APPID>"; // Your APPID// COS bucket name, in the format of [bucket]-[appid], for example `mybucket-1253666666`. It can be obtained at https://console.tencentcloud.com/cos5/bucket.static char TEST_BUCKET_NAME[] = "<bucketname-appid>";void init_test_config(cos_config_t *config, int is_cname){cos_str_set(&config->endpoint, TEST_COS_ENDPOINT);cos_str_set(&config->access_key_id, TEST_ACCESS_KEY_ID);cos_str_set(&config->access_key_secret, TEST_ACCESS_KEY_SECRET);cos_str_set(&config->appid, TEST_APPID);config->is_cname = is_cname;}void init_test_request_options(cos_request_options_t *options, int is_cname){options->config = cos_config_create(options->pool);init_test_config(options->config, is_cname);options->ctl = cos_http_controller_create(options->pool, 0);}void test_list_all_objects(){cos_pool_t *p = NULL;int is_cname = 0;cos_status_t *s = NULL;cos_request_options_t *options = NULL;cos_string_t bucket;cos_table_t *resp_headers;int is_truncated = 1;cos_string_t marker;cos_pool_create(&p, NULL);options = cos_request_options_create(p);init_test_request_options(options, is_cname);cos_str_set(&bucket, TEST_BUCKET_NAME);//list object (get bucket)cos_list_object_params_t *list_params = NULL;list_params = cos_create_list_object_params(p);// Set the maximum number of traversed objects (up to 1,000 per listobject request)list_params->max_ret = 1000;cos_str_set(&marker, "");while (is_truncated) {list_params->marker = marker;cos_list_init(&list_params->object_list);s = cos_list_object(options, &bucket, list_params, &resp_headers);if (!cos_status_is_ok(s)) {printf("list object failed, req_id:%s\\n", s->req_id);break;}// `list_params->object_list` returns the following objectscos_list_object_content_t *content = NULL;cos_list_for_each_entry(cos_list_object_content_t, content, &list_params->object_list, node) {printf("object: %s\\n", content->key.data);}is_truncated = list_params->truncated;marker = list_params->next_marker;}cos_pool_destroy(p);}int main(int argc, char *argv[]){// Get SecretId and SecretKey from environment variablesTEST_ACCESS_KEY_ID = getenv("COS_SECRETID");TEST_ACCESS_KEY_SECRET = getenv("COS_SECRETKEY");if (cos_http_io_initialize(NULL, 0) != COSE_OK) {exit(1);}// Set the log level. Default value: `COS_LOG_WARN`cos_log_set_level(COS_LOG_WARN);// Set log output. Default value: `stderr`cos_log_set_output(NULL);test_list_all_objects();cos_http_io_deinitialize();return 0;}
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