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Deleting Objects

Last updated: 2024-02-02 17:35:18

    Overview

    This document provides an overview of APIs and SDK code samples related to object deletion.
    API
    Operation
    Description
    Deleting an object
    Deletes an object from a bucket.
    Deleting multiple objects
    Deletes multiple objects from a bucket in a single request

    Deleting an object

    Description

    This API (DELETE Object) is used to delete an object from a COS bucket. To call this API, you must have write access to the bucket.

    Sample code

    cos.deleteObject({
    Bucket: 'examplebucket-1250000000', /* Your bucket name. Required. */
    Region: 'COS_REGION', /* Bucket region, such as `ap-beijing`. Required. */
    Key: '1.jpg', /* Object key stored in the bucket (such as `1.jpg` and `a/b/test.txt`). 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, see Regions and Access Endpoints.
    String
    Yes
    Key
    ObjectKey (object name) is the unique identifier of an object in a bucket. For more information, see Object Overview.
    String
    Yes
    VersionId
    Version ID of the object or delete marker to delete
    String
    No

    Callback function description

    function(err, data) { ... }
    Parameter
    Description
    Type
    err
    Error code, which is returned when an error (network error or service error) occurs. If the request is successful, this parameter is 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, 204, 403, and 404. If the deletion is successful or the object does not exist, 204 or 200 will be returned. If the specified bucket is not found, 404 will be returned.
    Number
    - headers
    Headers
    Object

    Deleting multiple objects

    Description

    This API (DELETE Multiple Objects) is used to delete multiple objects from a bucket. You can delete up to 1,000 objects in a single request. There are two response modes for you to choose from: Verbose and Quiet. The Verbose mode returns the deletion result of each object, whereas the Quiet mode returns only information about the objects that fail to be deleted.

    Sample code

    Deleting multiple files
    cos.deleteMultipleObject({
    Bucket: 'examplebucket-1250000000', /* Your bucket name. Required. */
    Region: 'COS_REGION', /* Bucket region, such as `ap-beijing`. Required. */
    Objects: [
    { Key: '1.jpg' }, /* Object key stored in the bucket (such as `1.jpg` and `a/b/test.txt`). Required. */
    { Key: '2.txt' }, /* Object key stored in the bucket (such as `1.jpg` and `a/b/test.txt`). Required. */
    ]
    }, function(err, data) {
    console.log(err || data);
    });
    Deleting multiple objects with a specified prefix (deleting files in the specified a directory)
    var deleteFiles = function (marker) {
    cos.getBucket({
    Bucket: 'examplebucket-1250000000', /* Your bucket name. Required. */
    Region: 'COS_REGION', /* Bucket region, such as `ap-beijing`. Required. */
    Prefix: 'a/',
    Marker: marker,
    MaxKeys: 1000,
    }, function (listError, listResult) {
    if (listError) return console.log('list error:', listError);
    var nextMarker = listResult.NextMarker;
    var objects = listResult.Contents.map(function (item) {
    return {Key: item.Key}
    });
    cos.deleteMultipleObject({
    Bucket: bucket,
    Region: region,
    Objects: objects,
    }, function (delError, deleteResult) {
    if (delError) {
    console.log('delete error', delError);
    console.log('delete stop');
    } else {
    console.log('delete result', deleteResult);
    if (listResult.IsTruncated === 'true') deleteFiles(nextMarker);
    else console.log('delete complete');
    }
    });
    });
    }
    deleteFiles();

    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
    Quiet
    Whether to use the Quiet mode. If it is set to true, the Quiet mode is enabled. If it is set to false (default), the Verbose mode is enabled.
    Boolean
    No
    Objects
    List of objects to delete.
    ObjectArray
    Yes
    - Key
    Object key (object name), the unique identifier of an object in a bucket. For more information, please see Object Overview.
    String
    Yes
    - VersionId
    Version ID of the object or delete marker to delete.
    String
    No

    Callback function description

    function(err, data) { ... }
    Parameter
    Description
    Type
    err
    Error code, which is returned when an error (network error or service error) occurs. If the request is successful, this parameter is empty. For more information, please see Error Codes.
    Object
    - statusCode
    HTTP status code, such as 200, 204, 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, 204, 403, and 404
    Number
    - headers
    Headers
    Object
    - Deleted
    List of objects deleted successfully
    ObjectArray
    - - Key
    Object key (object name), the unique identifier of an object in a bucket. For more information, please see Object Overview.
    String
    - - VersionId
    If the VersionId parameter is passed in, it will also be included in the response, indicating the version of the object or delete marker deleted.
    String
    - - DeleteMarker
    If versioning is enabled and the VersionId parameter is not specified, the deletion will not actually delete the file; instead, it will only add a new delete marker, indicating that the visible file has been deleted. Enumerated values: true, false
    String
    - - DeleteMarkerVersionId
    VersionId of the newly added delete marker if DeleteMarker is true.
    String
    - Error
    List of objects whose deletion failed
    ObjectArray
    - - Key
    Object key (object name), the unique identifier of an object in a bucket. For more information, please see Object Overview.
    String
    - - Code
    Error code for failed deletion
    String
    - - Message
    Error message for failed deletion
    String
    
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