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Bucket Operations

Terakhir diperbarui:2022-01-23 14:27:55

    Overview

    This document provides an overview of APIs and SDK sample codes related to basic bucket operations and access control lists (ACL).

    Basic operations

    API Operation Description
    PUT Bucket Creating a bucket Creates a bucket under a specified account
    DELETE Bucket Deleting a bucket Deletes an empty bucket from a specified account

    Extracting a bucket and its permissions

    API Operation Description
    HEAD Bucket Checking a bucket and its permissions Checks whether a bucket exists and whether you have permission to access it

    Basic operations

    Creating a bucket

    Description

    This API is used to create a bucket under a specified account.

    Method prototype

    cos_status_t *cos_create_bucket(const cos_request_options_t *options, 
                                  const cos_string_t *bucket, 
                                  cos_acl_e cos_acl, 
                                  cos_table_t **resp_headers);
    

    Parameter description

    Parameter Description Type
    options COS request options Struct
    bucket Bucket name in the format: BucketName-APPID String
    cos_acl Allow users to customize permissions.
    Valid values: COS_ACL_PRIVATE(0) (default), COS_ACL_PUBLIC_READ(1), COS_ACL_PUBLIC_READ_WRITE(2)
    Enum
    resp_headers Returns the HTTP response headers Struct

    Response description

    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

    Sample

    #include "cos_http_io.h"
    #include "cos_api.h"
    #include "cos_log.h"
    #include <unistd.h>
    // `endpoint` is the COS access domain name. For more information, see https://intl.cloud.tencent.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.intl.cloud.tencent.com/cam/capi.
    static char *TEST_ACCESS_KEY_ID;                // Your SecretId
    static char *TEST_ACCESS_KEY_SECRET;            // Your SecretKey
    // A unique user-level resource identifier for COS access. It can be obtained at https://console.intl.cloud.tencent.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.intl.cloud.tencent.com/cos5/bucket.
    static char TEST_BUCKET_NAME[] = "<bucketname-appid>"; 
    void log_status(cos_status_t *s)
    {
      cos_warn_log("status->code: %d", s->code);
      if (s->error_code) cos_warn_log("status->error_code: %s", s->error_code);
      if (s->error_msg) cos_warn_log("status->error_msg: %s", s->error_msg);
      if (s->req_id) cos_warn_log("status->req_id: %s", s->req_id);
    }
    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_create_bucket()
    {
      cos_pool_t *p = NULL;
      int is_cname = 0; 
      cos_status_t *s = NULL;
      cos_request_options_t *options = NULL;
      cos_acl_e cos_acl = COS_ACL_PRIVATE;
      cos_string_t bucket;
      cos_table_t *resp_headers;
    
      // Initialize the request options
      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);
       // Create a bucket
      s = cos_create_bucket(options, &bucket, cos_acl, &resp_headers);
      if (cos_status_is_ok(s)) {
              printf("create bucket succeeded\n");
      } else {
              printf("create bucket failed\n");
      }
       // Destroy the memory pool
      cos_pool_destroy(p); 
    }
    int main(int argc, char *argv[])
    {
      // Get SecretId and SecretKey from environment variables
      TEST_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_create_bucket();
       cos_http_io_deinitialize();
       return 0;
    }
    

    Deleting a bucket

    Description

    This API is used to delete an empty bucket under a specified account.

    Method prototype

    cos_status_t *cos_delete_bucket(const cos_request_options_t *options,
                                  const cos_string_t *bucket, 
                                  cos_table_t **resp_headers);
    

    Parameter description

    Parameter Description Type
    options COS request options Struct
    bucket Bucket name in the format: BucketName-APPID String
    resp_headers Returns the HTTP response headers Struct

    Response description

    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

    Sample

    #include "cos_http_io.h"
    #include "cos_api.h"
    #include "cos_log.h"
    #include <unistd.h>
    // `endpoint` is the COS access domain name. For more information, see https://intl.cloud.tencent.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.intl.cloud.tencent.com/cam/capi.
    static char *TEST_ACCESS_KEY_ID;                // Your SecretId
    static char *TEST_ACCESS_KEY_SECRET;            // Your SecretKey
    // A unique user-level resource identifier for COS access. It can be obtained at https://console.intl.cloud.tencent.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.intl.cloud.tencent.com/cos5/bucket.
    static char TEST_BUCKET_NAME[] = "<bucketname-appid>"; 
    void log_status(cos_status_t *s)
    {
      cos_warn_log("status->code: %d", s->code);
      if (s->error_code) cos_warn_log("status->error_code: %s", s->error_code);
      if (s->error_msg) cos_warn_log("status->error_msg: %s", s->error_msg);
      if (s->req_id) cos_warn_log("status->req_id: %s", s->req_id);
    }
    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_delete_bucket()
    {
      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;
    
      // Initialize the request options
      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);
       // Delete a bucket
      s = cos_delete_bucket(options, &bucket, &resp_headers);
      if (cos_status_is_ok(s)) {
              printf("create bucket succeeded\n");
      } else {
              printf("create bucket failed\n");
      }
       // Destroy the memory pool
      cos_pool_destroy(p); 
    }
    int main(int argc, char *argv[])
    {
      // Get SecretId and SecretKey from environment variables
      TEST_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_delete_bucket();
       cos_http_io_deinitialize();
       return 0;
    }
    

    Checking whether a bucket exists

    Description

    This API is used to check whether a bucket exists. It actually calls the HEAD Bucket API to perform the action.

    Method prototype

    cos_status_t *cos_check_bucket_exist(const cos_request_options_t *options,
                                       const cos_string_t *bucket,
                                       cos_bucket_exist_status_e *bucket_exist,
                                       cos_table_t **resp_headers)
    

    Parameter description

    Parameter Description Type
    options COS request options Struct
    bucket Bucket name in the format: BucketName-APPID String
    bucket_exist Whether a bucket exists. Enumerated values: exist, non exist, unknown (no explicit state is obtained) Enum
    resp_headers Returns the HTTP response headers Struct

    Response description

    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

    Sample

    #include "cos_http_io.h"
    #include "cos_api.h"
    #include "cos_log.h"
    #include <unistd.h>
    // `endpoint` is the COS access domain name. For more information, see https://intl.cloud.tencent.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.intl.cloud.tencent.com/cam/capi.
    static char *TEST_ACCESS_KEY_ID;                // Your SecretId
    static char *TEST_ACCESS_KEY_SECRET;            // Your SecretKey
    // A unique user-level resource identifier for COS access. It can be obtained at https://console.intl.cloud.tencent.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.intl.cloud.tencent.com/cos5/bucket.
    static char TEST_BUCKET_NAME[] = "<bucketname-appid>"; 
    void log_status(cos_status_t *s)
    {
      cos_warn_log("status->code: %d", s->code);
      if (s->error_code) cos_warn_log("status->error_code: %s", s->error_code);
      if (s->error_msg) cos_warn_log("status->error_msg: %s", s->error_msg);
      if (s->req_id) cos_warn_log("status->req_id: %s", s->req_id);
    }
    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_check_bucket_exist()
    {
      cos_pool_t *pool = NULL;
      int is_cname = 0;
      cos_status_t *status = NULL;
      cos_request_options_t *options = NULL;
      cos_string_t bucket;
      cos_table_t *resp_headers = NULL;
      cos_bucket_exist_status_e bucket_exist;
       // Create a memory pool
      cos_pool_create(&pool, NULL);
       // Initialize the request options
      options = cos_request_options_create(pool);
      init_test_request_options(options, is_cname);
       cos_str_set(&bucket, TEST_BUCKET_NAME);
    
      // Check whether a bucket exists
      status = cos_check_bucket_exist(options, &bucket, &bucket_exist, &resp_headers);
      if (bucket_exist == COS_BUCKET_NON_EXIST) {
          printf("bucket: %.*s non exist.\n", bucket.len, bucket.data);
      } else if (bucket_exist == COS_BUCKET_EXIST) {
          printf("bucket: %.*s exist.\n", bucket.len, bucket.data);
      } else {
          printf("bucket: %.*s unknown status.\n", bucket.len, bucket.data);
          log_status(status);
      }
       cos_pool_destroy(pool);
    }
    int main(int argc, char *argv[])
    {
      // Get SecretId and SecretKey from environment variables
      TEST_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_check_bucket_exist();
       cos_http_io_deinitialize();
       return 0;
    }
    
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