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SetBucketPolicy.go
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SetBucketPolicy.go
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// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
// snippet-start:[s3.go.set_bucket_policy]
package main
// snippet-start:[s3.go.set_bucket_policy.imports]
import (
"encoding/json"
"flag"
"fmt"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3"
)
// snippet-end:[s3.go.set_bucket_policy.imports]
// SetBucketPolicy applies the policy to a bucket
// Inputs:
//
// sess is the current session, which provides configuration for the SDK's service clients
// bucket is the name of the bucket
//
// Output:
//
// If success, nil
// Otherwise, an error from the call to PutBucketPolicy
func SetBucketPolicy(sess *session.Session, bucket *string) error {
// snippet-start:[s3.go.set_bucket_policy.call]
svc := s3.New(sess)
readOnlyAnonUserPolicy := map[string]interface{}{
"Version": "2012-10-17",
"Statement": []map[string]interface{}{
{
"Sid": "AddPerm",
"Effect": "Allow",
"Principal": "*",
"Action": []string{
"s3:GetObject",
},
"Resource": []string{
"arn:aws:s3:::" + *bucket + "/*",
},
},
},
}
policy, err := json.Marshal(readOnlyAnonUserPolicy)
if err != nil {
return err
}
_, err = svc.PutBucketPolicy(&s3.PutBucketPolicyInput{
Bucket: bucket,
Policy: aws.String(string(policy)),
})
// snippet-end:[s3.go.set_bucket_policy.call]
if err != nil {
return err
}
return nil
}
func main() {
// snippet-start:[s3.go.set_bucket_policy.args]
bucket := flag.String("b", "", "The name of the bucket")
flag.Parse()
if *bucket == "" {
fmt.Println("You must supply a bucket name (-b BUCKET)")
return
}
// snippet-end:[s3.go.set_bucket_policy.args]
// snippet-start:[s3.go.set_bucket_policy.session]
sess := session.Must(session.NewSessionWithOptions(session.Options{
SharedConfigState: session.SharedConfigEnable,
}))
// snippet-end:[s3.go.set_bucket_policy.session]
err := SetBucketPolicy(sess, bucket)
if err != nil {
fmt.Println("Got an error setting bucket policy:")
fmt.Println(err)
return
}
fmt.Println("Set the bucket policy")
}
// snippet-end:[s3.go.set_bucket_policy]