84 lines
2.8 KiB
Go
84 lines
2.8 KiB
Go
|
package s3manager
|
||
|
|
||
|
import (
|
||
|
"github.com/aws/aws-sdk-go/aws"
|
||
|
"github.com/aws/aws-sdk-go/aws/client"
|
||
|
"github.com/aws/aws-sdk-go/aws/credentials"
|
||
|
"github.com/aws/aws-sdk-go/aws/request"
|
||
|
"github.com/aws/aws-sdk-go/service/s3"
|
||
|
"github.com/aws/aws-sdk-go/service/s3/s3iface"
|
||
|
)
|
||
|
|
||
|
// GetBucketRegion will attempt to get the region for a bucket using the
|
||
|
// regionHint to determine which AWS partition to perform the query on.
|
||
|
//
|
||
|
// The request will not be signed, and will not use your AWS credentials.
|
||
|
//
|
||
|
// A "NotFound" error code will be returned if the bucket does not exist in
|
||
|
// the AWS partition the regionHint belongs to.
|
||
|
//
|
||
|
// For example to get the region of a bucket which exists in "eu-central-1"
|
||
|
// you could provide a region hint of "us-west-2".
|
||
|
//
|
||
|
// sess := session.Must(session.NewSession())
|
||
|
//
|
||
|
// bucket := "my-bucket"
|
||
|
// region, err := s3manager.GetBucketRegion(ctx, sess, bucket, "us-west-2")
|
||
|
// if err != nil {
|
||
|
// if aerr, ok := err.(awserr.Error); ok && aerr.Code() == "NotFound" {
|
||
|
// fmt.Fprintf(os.Stderr, "unable to find bucket %s's region not found\n", bucket)
|
||
|
// }
|
||
|
// return err
|
||
|
// }
|
||
|
// fmt.Printf("Bucket %s is in %s region\n", bucket, region)
|
||
|
//
|
||
|
func GetBucketRegion(ctx aws.Context, c client.ConfigProvider, bucket, regionHint string, opts ...request.Option) (string, error) {
|
||
|
svc := s3.New(c, &aws.Config{
|
||
|
Region: aws.String(regionHint),
|
||
|
})
|
||
|
return GetBucketRegionWithClient(ctx, svc, bucket, opts...)
|
||
|
}
|
||
|
|
||
|
const bucketRegionHeader = "X-Amz-Bucket-Region"
|
||
|
|
||
|
// GetBucketRegionWithClient is the same as GetBucketRegion with the exception
|
||
|
// that it takes a S3 service client instead of a Session. The regionHint is
|
||
|
// derived from the region the S3 service client was created in.
|
||
|
//
|
||
|
// See GetBucketRegion for more information.
|
||
|
func GetBucketRegionWithClient(ctx aws.Context, svc s3iface.S3API, bucket string, opts ...request.Option) (string, error) {
|
||
|
req, _ := svc.HeadBucketRequest(&s3.HeadBucketInput{
|
||
|
Bucket: aws.String(bucket),
|
||
|
})
|
||
|
req.Config.S3ForcePathStyle = aws.Bool(true)
|
||
|
req.Config.Credentials = credentials.AnonymousCredentials
|
||
|
req.SetContext(ctx)
|
||
|
|
||
|
// Disable HTTP redirects to prevent an invalid 301 from eating the response
|
||
|
// because Go's HTTP client will fail, and drop the response if an 301 is
|
||
|
// received without a location header. S3 will return a 301 without the
|
||
|
// location header for HeadObject API calls.
|
||
|
req.DisableFollowRedirects = true
|
||
|
|
||
|
var bucketRegion string
|
||
|
req.Handlers.Send.PushBack(func(r *request.Request) {
|
||
|
bucketRegion = r.HTTPResponse.Header.Get(bucketRegionHeader)
|
||
|
if len(bucketRegion) == 0 {
|
||
|
return
|
||
|
}
|
||
|
r.HTTPResponse.StatusCode = 200
|
||
|
r.HTTPResponse.Status = "OK"
|
||
|
r.Error = nil
|
||
|
})
|
||
|
|
||
|
req.ApplyOptions(opts...)
|
||
|
|
||
|
if err := req.Send(); err != nil {
|
||
|
return "", err
|
||
|
}
|
||
|
|
||
|
bucketRegion = s3.NormalizeBucketLocation(bucketRegion)
|
||
|
|
||
|
return bucketRegion, nil
|
||
|
}
|