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DocumentationCloud Object StorageSDK DocumentationNode.js SDKBucket Operations
Bucket Operations
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Last updated: 2024-02-04 11:37:31
Bucket Operations
Last updated: 2024-02-04 11:37:31
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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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