/
delete.go
240 lines (187 loc) · 6.67 KB
/
delete.go
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package s3
import (
"context"
"fmt"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/service/s3"
"github.com/hashicorp/aws-sdk-go-base/v2/awsv1shim/v2/tfawserr"
multierror "github.com/hashicorp/go-multierror"
)
// EmptyBucket empties the specified S3 bucket by deleting all object versions and delete markers.
// If `force` is `true` then S3 Object Lock governance mode restrictions are bypassed and
// an attempt is made to remove any S3 Object Lock legal holds.
// Returns the number of objects deleted.
func EmptyBucket(ctx context.Context, conn *s3.S3, bucket string, force bool) (int64, error) {
nObjects, err := forEachObjectVersionsPage(ctx, conn, bucket, func(ctx context.Context, conn *s3.S3, bucket string, page *s3.ListObjectVersionsOutput) (int64, error) {
return deletePageOfObjectVersions(ctx, conn, bucket, force, page)
})
if err != nil {
return nObjects, err
}
n, err := forEachObjectVersionsPage(ctx, conn, bucket, deletePageOfDeleteMarkers)
nObjects += n
if err != nil {
return nObjects, err
}
return nObjects, nil
}
// forEachObjectVersionsPage calls the specified function for each page returned from the S3 ListObjectVersionsPages API.
func forEachObjectVersionsPage(ctx context.Context, conn *s3.S3, bucket string, fn func(ctx context.Context, conn *s3.S3, bucket string, page *s3.ListObjectVersionsOutput) (int64, error)) (int64, error) {
var nObjects int64
input := &s3.ListObjectVersionsInput{
Bucket: aws.String(bucket),
}
var lastErr error
err := conn.ListObjectVersionsPagesWithContext(ctx, input, func(page *s3.ListObjectVersionsOutput, lastPage bool) bool {
if page == nil {
return !lastPage
}
n, err := fn(ctx, conn, bucket, page)
nObjects += n
if err != nil {
lastErr = err
return false
}
return !lastPage
})
if err != nil {
return nObjects, fmt.Errorf("listing S3 Bucket (%s) object versions: %w", bucket, err)
}
if lastErr != nil {
return nObjects, lastErr
}
return nObjects, nil
}
// deletePageOfObjectVersions deletes a page (<= 1000) of S3 object versions.
// If `force` is `true` then S3 Object Lock governance mode restrictions are bypassed and
// an attempt is made to remove any S3 Object Lock legal holds.
// Returns the number of objects deleted.
func deletePageOfObjectVersions(ctx context.Context, conn *s3.S3, bucket string, force bool, page *s3.ListObjectVersionsOutput) (int64, error) {
var nObjects int64
toDelete := make([]*s3.ObjectIdentifier, 0, len(page.Versions))
for _, v := range page.Versions {
toDelete = append(toDelete, &s3.ObjectIdentifier{
Key: v.Key,
VersionId: v.VersionId,
})
}
if nObjects = int64(len(toDelete)); nObjects == 0 {
return nObjects, nil
}
input := &s3.DeleteObjectsInput{
Bucket: aws.String(bucket),
Delete: &s3.Delete{
Objects: toDelete,
Quiet: aws.Bool(true), // Only report errors.
},
}
if force {
input.BypassGovernanceRetention = aws.Bool(true)
}
output, err := conn.DeleteObjectsWithContext(ctx, input)
if tfawserr.ErrCodeEquals(err, s3.ErrCodeNoSuchBucket) {
return nObjects, nil
}
if err != nil {
return nObjects, fmt.Errorf("deleting S3 Bucket (%s) objects: %w", bucket, err)
}
nObjects -= int64(len(output.Errors))
var deleteErrs *multierror.Error
for _, v := range output.Errors {
code := aws.StringValue(v.Code)
if code == s3.ErrCodeNoSuchKey {
continue
}
// Attempt to remove any legal hold on the object.
if force && code == ErrCodeAccessDenied {
key := aws.StringValue(v.Key)
versionID := aws.StringValue(v.VersionId)
_, err := conn.PutObjectLegalHoldWithContext(ctx, &s3.PutObjectLegalHoldInput{
Bucket: aws.String(bucket),
Key: aws.String(key),
VersionId: aws.String(versionID),
LegalHold: &s3.ObjectLockLegalHold{
Status: aws.String(s3.ObjectLockLegalHoldStatusOff),
},
})
if err != nil {
// Add the original error and the new error.
deleteErrs = multierror.Append(deleteErrs, newDeleteObjectVersionError(v))
deleteErrs = multierror.Append(deleteErrs, fmt.Errorf("removing legal hold: %w", newObjectVersionError(key, versionID, err)))
} else {
// Attempt to delete the object once the legal hold has been removed.
_, err := conn.DeleteObjectWithContext(ctx, &s3.DeleteObjectInput{
Bucket: aws.String(bucket),
Key: aws.String(key),
VersionId: aws.String(versionID),
})
if err != nil {
deleteErrs = multierror.Append(deleteErrs, fmt.Errorf("deleting: %w", newObjectVersionError(key, versionID, err)))
} else {
nObjects++
}
}
} else {
deleteErrs = multierror.Append(deleteErrs, newDeleteObjectVersionError(v))
}
}
if err := deleteErrs.ErrorOrNil(); err != nil {
return nObjects, fmt.Errorf("deleting S3 Bucket (%s) objects: %w", bucket, err)
}
return nObjects, nil
}
// deletePageOfDeleteMarkers deletes a page (<= 1000) of S3 object delete markers.
// Returns the number of delete markers deleted.
func deletePageOfDeleteMarkers(ctx context.Context, conn *s3.S3, bucket string, page *s3.ListObjectVersionsOutput) (int64, error) {
var nObjects int64
toDelete := make([]*s3.ObjectIdentifier, 0, len(page.Versions))
for _, v := range page.DeleteMarkers {
toDelete = append(toDelete, &s3.ObjectIdentifier{
Key: v.Key,
VersionId: v.VersionId,
})
}
if nObjects = int64(len(toDelete)); nObjects == 0 {
return nObjects, nil
}
input := &s3.DeleteObjectsInput{
Bucket: aws.String(bucket),
Delete: &s3.Delete{
Objects: toDelete,
Quiet: aws.Bool(true), // Only report errors.
},
}
output, err := conn.DeleteObjectsWithContext(ctx, input)
if tfawserr.ErrCodeEquals(err, s3.ErrCodeNoSuchBucket) {
return nObjects, nil
}
if err != nil {
return nObjects, fmt.Errorf("deleting S3 Bucket (%s) delete markers: %w", bucket, err)
}
nObjects -= int64(len(output.Errors))
var deleteErrs *multierror.Error
for _, v := range output.Errors {
deleteErrs = multierror.Append(deleteErrs, newDeleteObjectVersionError(v))
}
if err := deleteErrs.ErrorOrNil(); err != nil {
return nObjects, fmt.Errorf("deleting S3 Bucket (%s) delete markers: %w", bucket, err)
}
return nObjects, nil
}
func newObjectVersionError(key, versionID string, err error) error {
if err == nil {
return nil
}
if versionID == "" {
return fmt.Errorf("S3 object (%s): %w", key, err)
}
return fmt.Errorf("S3 object (%s) version (%s): %w", key, versionID, err)
}
func newDeleteObjectVersionError(err *s3.Error) error {
if err == nil {
return nil
}
awsErr := awserr.New(aws.StringValue(err.Code), aws.StringValue(err.Message), nil)
return fmt.Errorf("deleting: %w", newObjectVersionError(aws.StringValue(err.Key), aws.StringValue(err.VersionId), awsErr))
}