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Bucket Operations

Last updated: 2024-02-04 11:37:31

    Overview

    This document provides an overview of APIs and SDK code samples related to basic bucket operations.
    API
    Operation
    Description
    Querying a bucket list
    Queries the list of all buckets under a specified account
    Creating a bucket
    Creates a bucket under a specified account
    Checking a bucket and its permissions
    Checks whether a bucket exists and whether you have permission to access it
    Deleting a bucket
    Deletes an empty bucket from a specified account

    Querying a Bucket List

    Description

    This API (GET Service) is used to query the list of all buckets under a requester's account or in a specified region. For more information, please see GET Service.

    Sample code

    Sample 1. Listing all buckets
    cos.getService(function(err, data) {
    console.log(err || data);
    });
    Sample 2. Listing all buckets in a specified region
    cos.getService({
    Region: 'COS_REGION',
    }, function(err, data) {
    console.log(err || data);
    });

    Parameter description

    Parameter
    Description
    Type
    Required
    Region
    Bucket region. For the enumerated values, please see Regions and Access Endpoints.
    String
    No

    Callback function description

    function(err, data) { ... }
    Parameter
    Description
    Type
    err
    Object returned when an error (network error or service error) occurs. If the request is successful, this parameter is left empty. For more information, please see Error Codes.
    Object
    - statusCode
    HTTP status code, such as 200, 403, and 404
    Number
    - headers
    Headers
    Object
    data
    Content returned when the request is successful. If the request fails, this parameter is empty.
    Object
    - statusCode
    HTTP status code, such as 200, 403, and 404
    Number
    - headers
    Headers
    Object
    - Owner
    Object representing the bucket owner
    Object
    - - ID
    Complete ID of the bucket owner in the format: qcs::cam::uin/[OwnerUin]:uin/[OwnerUin], such as qcs::cam::uin/100000000001:uin/100000000001
    string
    - - DisplayName
    Name of the bucket owner
    String
    - Buckets
    Bucket list
    Object
    - - Name
    Bucket name in the format of <BucketName-APPID>, such as examplebucket-1250000000
    String
    - - Location
    Bucket region, such as ap-guangzhou, ap-beijing, and ap-hongkong. For more information, please see Regions and Access Endpoints.
    String
    - - CreationDate
    Time when the bucket was created, in ISO 8601 format, such as 2019-05-24T10:56:40Z
    string

    Creating a Bucket

    Description

    This API (PUT Bucket) is used to create a bucket under a specified account.

    Sample code

    cos.putBucket({
    Bucket: 'examplebucket-1250000000',
    Region: 'COS_REGION'
    }, function(err, data) {
    console.log(err || data);
    });

    Parameter description

    Parameter
    Description
    Type
    Required
    Bucket
    Bucket name in the format of BucketName-APPID
    String
    Yes
    Region
    Bucket region. For the enumerated values, please see Regions and Access Endpoints.
    String
    Yes
    ACL
    Defines the access control list (ACL) attribute of the bucket. For enumerated values, such as private and public-read, see the "Preset ACLs for buckets" section in ACL Overview. Default value: private
    String
    No
    GrantRead
    Grants a user read permission in the format: id=" ",id=" ".
    To authorize a sub-account, use id="qcs::cam::uin/<OwnerUin>:uin/<SubUin>".
    To authorize a root account, use id="qcs::cam::uin/<OwnerUin>:uin/<OwnerUin>".
    Example: 'id="qcs::cam::uin/100000000001:uin/100000000001", id="qcs::cam::uin/100000000001:uin/100000000011"'
    String
    No
    GrantWrite
    Grants a user write permission in the format: id=" ",id=" ".
    To authorize a sub-account, use id="qcs::cam::uin/<OwnerUin>:uin/<SubUin>".
    To authorize a root account, use id="qcs::cam::uin/<OwnerUin>:uin/<OwnerUin>".
    Examples: 'id="qcs::cam::uin/100000000001:uin/100000000001", id="qcs::cam::uin/100000000001:uin/100000000011"'
    String
    No
    GrantReadAcp
    Grants a user read permission for a bucket’s ACL and policies in the format: id=" ",id=" ".
    To authorize a sub-account, use id="qcs::cam::uin/<OwnerUin>:uin/<SubUin>".
    To authorize a root account, use id="qcs::cam::uin/<OwnerUin>:uin/<OwnerUin>".
    Example: 'id="qcs::cam::uin/100000000001:uin/100000000001", id="qcs::cam::uin/100000000001:uin/100000000011"'
    String
    No
    GrantWriteAcp
    Grants a user write permission for a bucket’s ACL and policies in the format: id=" ",id=" ".
    To authorize a sub-account, use id="qcs::cam::uin/<OwnerUin>:uin/<SubUin>".
    To authorize a root account, use id="qcs::cam::uin/<OwnerUin>:uin/<OwnerUin>".
    Examples: 'id="qcs::cam::uin/100000000001:uin/100000000001", id="qcs::cam::uin/100000000001:uin/100000000011"'
    String
    No
    GrantFullControl
    Grants full permission in the format: id="[OwnerUin]". You can use commas (,) to separate multiple users.
    To authorize a sub-account, use id="qcs::cam::uin/<OwnerUin>:uin/<SubUin>".
    To authorize a root account, use id="qcs::cam::uin/<OwnerUin>:uin/<OwnerUin>".
    Example: 'id="qcs::cam::uin/100000000001:uin/100000000001", id="qcs::cam::uin/100000000001:uin/100000000011"'
    String
    No

    Callback function description

    function(err, data) { ... }
    Parameter
    Description
    Type
    err
    Object returned when an error (network error or service error) occurs. If the request is successful, this parameter is left empty. For more information, please see Error Codes.
    Object
    - statusCode
    HTTP status code, such as 200, 403, and 404
    Number
    - headers
    Headers
    Object
    data
    Content returned when the request is successful. If the request fails, this parameter is empty.
    Object
    - statusCode
    HTTP status code, such as 200, 403, and 404
    Number
    - headers
    Headers
    Object

    Checking a Bucket and Its Permissions

    Description

    This API is used to verify whether a bucket exists and whether you have permission to access it.
    If the bucket exists and you have permission to read it, the HTTP status code "200" will be returned.
    If you do not have permission to read the bucket, the HTTP status code "403" will be returned.
    If the bucket does not exist, the HTTP status code "404" will be returned.

    Sample code

    Extracting bucket information:
    cos.headBucket({
    Bucket: 'examplebucket-1250000000', /* Required */
    Region: 'COS_REGION', /* Required */
    }, function(err, data) {
    console.log(err || data);
    });
    Determining whether the bucket exists:
    function doesBucketExist() {
    cos.headBucket({
    Bucket: 'examplebucket-1250000000', /* Required */
    Region: 'COS_REGION', /* Bucket region. Required */
    }, function(err, data) {
    if (data) {
    console.log('The bucket exists.');
    } else if (err.statusCode == 404) {
    console.log('The bucket does not exist.');
    } else if (err.statusCode == 403) {
    console.log ('no permission to read the bucket');
    }
    });
    }

    Parameter description

    Parameter
    Description
    Type
    Required
    Bucket
    Bucket name in the format of BucketName-APPID
    String
    Yes
    Region
    Bucket region. For the enumerated values, please see Regions and Access Endpoints.
    String
    Yes

    Callback function description

    function(err, data) { ... }
    Parameter
    Description
    Type
    err
    Object returned when an error (network error or service error) occurs. If the request is successful, this parameter is left empty. For more information, please see Error Codes.
    Object
    - statusCode
    HTTP status code, such as 200, 403, and 404
    Number
    - headers
    Headers
    Object
    data
    Content returned when the request is successful. If the request fails, this parameter is empty.
    Object
    - statusCode
    HTTP status code, such as 200, 403, and 404
    Number
    - headers
    Headers
    Object

    Deleting a Bucket

    Description

    This API is used to delete an empty bucket under a specified account. Note that if the deletion is successful, the HTTP status code 200 or 204 will be returned.
    Note:
    Before deleting a bucket, please make sure that all the data and incomplete multipart uploads in the bucket have been cleared; otherwise, the bucket cannot be deleted.

    Sample code

    cos.deleteBucket({
    Bucket: 'examplebucket-1250000000', /* Required */
    Region: 'COS_REGION', /*Required*/
    }, function(err, data) {
    console.log(err || data);
    });

    Parameter description

    Parameter
    Description
    Type
    Required
    Bucket
    Bucket name in the format of BucketName-APPID
    String
    Yes
    Region
    Bucket region. For the enumerated values, please see Regions and Access Endpoints.
    String
    Yes

    Callback function description

    function(err, data) { ... }
    
    Parameter
    Description
    Type
    err
    Object returned when an error (network error or service error) occurs. If the request is successful, this parameter is left empty. For more information, please see Error Codes.
    Object
    - statusCode
    HTTP status code, such as 200, 403, and 404
    Number
    - headers
    Headers
    Object
    data
    Content returned when the request is successful. If the request fails, this parameter is empty.
    Object
    - statusCode
    HTTP status code, such as 200, 403, and 404
    Number
    - headers
    Headers
    Object
    
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