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Checking Whether Objects Exist
Last updated: 2024-02-05 11:10:42
Checking Whether Objects Exist
Last updated: 2024-02-05 11:10:42

Overview

This document provides the SDK code samples to determine whether an object exists.

Checking Whether Objects Exist

Feature description

This API is used to check whether an object exists in a bucket.

Method prototype

object_exists(Bucket, Key)

Sample request

# -*- coding=utf-8
from qcloud_cos import CosConfig
from qcloud_cos import CosS3Client
import sys
import os
import logging

# In most cases, set the log level to INFO. If you need to debug, you can set it to DEBUG and the SDK will print information about the communication with the server.
logging.basicConfig(level=logging.INFO, stream=sys.stdout)

# 1. Set user attributes such as secret_id, secret_key, and region. Appid has been removed from CosConfig and thus needs to be specified in Bucket, which is formatted as BucketName-Appid.
secret_id = os.environ['COS_SECRET_ID'] # User `SecretId`. We recommend you use a sub-account key and follow the principle of least privilege to reduce risks. For information about how to obtain a sub-account key, visit https://www.tencentcloud.com/document/product/598/32675.
secret_key = os.environ['COS_SECRET_KEY'] # User `SecretKey`. We recommend you use a sub-account key and follow the principle of least privilege to reduce risks. For information about how to obtain a sub-account key, visit https://www.tencentcloud.com/document/product/598/32675.
region = 'ap-beijing' # Replace it with the actual region, which can be viewed in the console at https://console.cloud.tencent.com/cos5/bucket.
# For the list of regions supported by COS, visit https://www.tencentcloud.com/document/product/436/6224.
token = None # Token is required for temporary keys but not permanent keys. For more information about how to generate and use a temporary key, visit https://www.tencentcloud.com/document/product/436/14048.
scheme = 'https' # Specify whether to use HTTP or HTTPS protocol to access COS. This field is optional and is `https` by default.

config = CosConfig(Region=region, SecretId=secret_id, SecretKey=secret_key, Token=token, Scheme=scheme)
client = CosS3Client(config)

response = client.object_exists(
Bucket='examplebucket-1250000000',
Key='exampleobject')
print(response)

Parameter description

Parameter
Description
Type
Required
Bucket
Bucket name in the format of BucketName-APPID
String
Yes
Key
Object key, which uniquely identifies an object in a bucket. For example, if an object’s access endpoint is examplebucket-1250000000.cos.ap-guangzhou.myqcloud.com/doc/pic.jpg, its key is doc/pic.jpg.
String
Yes

Response description

True means the object exists, while False means the object does not exist.
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