// setTags is a helper to set the tags for a resource. It expects the
// tags field to be named "tags"
func setTagsS3(conn *s3.S3, d *schema.ResourceData) error {
if d.HasChange("tags") {
oraw, nraw := d.GetChange("tags")
o := oraw.(map[string]interface{})
n := nraw.(map[string]interface{})
create, remove := diffTagsS3(tagsFromMapS3(o), tagsFromMapS3(n))
// Set tags
if len(remove) > 0 {
log.Printf("[DEBUG] Removing tags: %#v", remove)
err := conn.DeleteBucketTagging(&s3.DeleteBucketTaggingRequest{
Bucket: aws.String(d.Get("bucket").(string)),
})
if err != nil {
return err
}
}
if len(create) > 0 {
log.Printf("[DEBUG] Creating tags: %#v", create)
tagging := s3.Tagging{
TagSet: create,
XMLName: xml.Name{
Space: "http://s3.amazonaws.com/doc/2006-03-01/",
Local: "Tagging",
},
}
// AWS S3 API requires us to send a base64 encoded md5 hash of the
// content, which we need to build ourselves since aws-sdk-go does not.
b, err := xml.Marshal(tagging)
if err != nil {
return err
}
h := md5.New()
h.Write(b)
base := base64.StdEncoding.EncodeToString(h.Sum(nil))
req := &s3.PutBucketTaggingRequest{
Bucket: aws.String(d.Get("bucket").(string)),
ContentMD5: aws.String(base),
Tagging: &tagging,
}
err = conn.PutBucketTagging(req)
if err != nil {
return err
}
}
}
return nil
}
// return a slice of s3 tags associated with the given s3 bucket. Essentially
// s3.GetBucketTagging, except returns an empty slice instead of an error when
// there are no tags.
func getTagSetS3(s3conn *s3.S3, bucket string) ([]s3.Tag, error) {
request := &s3.GetBucketTaggingRequest{
Bucket: aws.String(bucket),
}
response, err := s3conn.GetBucketTagging(request)
if ec2err, ok := err.(aws.APIError); ok && ec2err.Code == "NoSuchTagSet" {
// There is no tag set associated with the bucket.
return []s3.Tag{}, nil
} else if err != nil {
return nil, err
}
return response.TagSet, nil
}
