Delete Bucket Policy

Follow these instructions to remove the policies that have been set on a bucket.

Components

• Credentials
• Bucket Name

.NET

// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX - License - Identifier: Apache - 2.0

using Amazon;
using Amazon.S3;
using Amazon.S3.Model;
using System;
using System.Diagnostics;
using System.Threading.Tasks;
using System.Reflection;

namespace DeleteBucketPolicy
{
  class DeleteBucketPolicy
  {
      // This example shows how to check a bucket existence.
      //  The examples uses AWS SDK for .NET 3.5 and .NET 5.0.

      private static IAmazonS3 _s3Client;

      // Specify the name of the bucket to check.
      private const string BUCKET_NAME = "<BUCKET_NAME>";

      static async Task Main()
      {
          var awsCredentials = new Amazon.Runtime.BasicAWSCredentials("<ACCESS-KEY>", "<SECRET-KEY>");
          var config = new AmazonS3Config { ServiceURL = "<ENDPOINT>" };
          _s3Client = new AmazonS3Client(awsCredentials, config);

          await DeleteBucketPolicyAsync(_s3Client, BUCKET_NAME);
      }

      /// <summary>
      /// DeleteBucketPolicyAsync calls the DoesS3BucketExistV2Async method
      /// to set bucket's policies.
      /// </summary>
      /// <param name="client">The Amazon S3 client object.</param>
      /// <param name="bucketName">The name of the bucket to check.</param>
      static async Task DeleteBucketPolicyAsync(IAmazonS3 client, string bucketName)
      {
          // Delete current policy
          DeleteBucketPolicyRequest deleteRequest = new DeleteBucketPolicyRequest
          {
              BucketName = bucketName,
          };
          Object policy = await client.DeleteBucketPolicyAsync(deleteRequest);

          foreach (PropertyInfo prop in policy.GetType().GetProperties())
          {
              Console.WriteLine($"{prop.Name}: {prop.GetValue(policy, null)}");
          }

          Console.WriteLine($"Policy successfully deleted from {bucketName} bucket");
      }
  }
}

PHP

<?php
require('client.php');
$bucket = $config['sample_bucket'];

// Deletes the policy from the bucket
try {
  $resp = $client->deleteBucketPolicy([
      'Bucket' => $bucket
  ]);
  echo "Succeed in deleting policy of bucket: " . $bucket . "\n";
} catch (AwsException $e) {
  // Display error message
  echo $e->getMessage();
  echo "\n";
}

Python

import boto3
import logging
from botocore.exceptions import ClientError

# Configure logging
logging.basicConfig(level=logging.INFO)

try:
   s3_resource = boto3.resource(
       's3',
       endpoint_url='endpoint_url',
       aws_access_key_id='access_key',
       aws_secret_access_key='secret_key'
   )

except Exception as exc:
   logging.error(exc)
else:
   try:
       bucket_name = 'sample_bucket'
       bucket_policy = s3_resource.BucketPolicy(bucket_name)
       bucket_policy.delete()
       logging.info(bucket_policy.policy)
   except ClientError as e:
       logging.error(e)

Javascript

// Import required AWS SDK clients and commands for Node.js
const { S3Client, DeleteBucketPolicyCommand } = require('@aws-sdk/client-s3');

// Create an S3 client service object
const s3 = new S3Client({
  region: 'default',
  endpoint: 'endpoint_url',
  credentials: {
      accessKeyId: 'access_key',
      secretAccessKey: 'secret_key',
  },
});

const run = async () => {
  try {
      const response = await s3.send(
          new DeleteBucketPolicyCommand({
              Bucket: 'sample_bucket',
          })
      );
      console.log('Success', response);
  } catch (err) {
      console.log('Error', err);
  }
};

run();

GO

package main

import (
  "fmt"
  "os"
  "path/filepath"

  "github.com/aws/aws-sdk-go/aws"
  "github.com/aws/aws-sdk-go/aws/awserr"
  "github.com/aws/aws-sdk-go/aws/credentials"
  "github.com/aws/aws-sdk-go/aws/session"
  "github.com/aws/aws-sdk-go/service/s3"
)

// Deletes the policy on a bucket. If the bucket doesn't exist, or there was
// and error an error message will be printed instead.
//
// Usage:
//    go run s3_delete_bucket_policy.go BUCKET_NAME
func main() {
  if len(os.Args) != 2 {
      exitErrorf("bucket name required\nUsage: %s bucket_name",
          filepath.Base(os.Args[0]))
  }
  bucket := os.Args[1]

  sess, err := session.NewSession(&aws.Config{
      Credentials: credentials.NewStaticCredentials("<ACCESS_KEY>", "<SECRET_KEY>", ""),
  })
  svc := s3.New(sess, &aws.Config{
      Region:   aws.String("default"),
      Endpoint: aws.String("<ENDPOINT_URL>"),
  })

  // Call S3 to delete the policy on the bucket.
  _, err = svc.DeleteBucketPolicy(&s3.DeleteBucketPolicyInput{
      Bucket: aws.String(bucket),
  })
  if err != nil {
      if aerr, ok := err.(awserr.Error); ok && aerr.Code() == s3.ErrCodeNoSuchBucket {
          // Special error handling for the when the bucket doesn't
          // exists so we can give a more direct error message from the CLI.
          exitErrorf("Bucket %q does not exist", bucket)
      }
      exitErrorf("Unable to delete bucket %q policy, %v", bucket, err)
  }

  fmt.Printf("Successfully deleted the policy on bucket %q.\n", bucket)
}

func exitErrorf(msg string, args ...interface{}) {
  fmt.Fprintf(os.Stderr, msg+"\n", args...)
  os.Exit(1)
}

The following command can be used to execute the aforementioned code, presuming the code file is called s3_delete_bucket_policy.go:

go run s3_delete_bucket_policy.go BUCKET_NAME