refactoring

weed/s3api/s3bucket/s3api_bucket.go

@@ -0,0 +1,40 @@
+package s3bucket
+
+import (
+	"fmt"
+	"net"
+	"strings"
+	"unicode"
+)
+
+// https://docs.aws.amazon.com/AmazonS3/latest/userguide/bucketnamingrules.html
+func VerifyS3BucketName(name string) (err error) {
+	if len(name) < 3 || len(name) > 63 {
+		return fmt.Errorf("bucket name must between [3, 63] characters")
+	}
+	for idx, ch := range name {
+		if !(unicode.IsLower(ch) || ch == '.' || ch == '-' || unicode.IsNumber(ch)) {
+			return fmt.Errorf("bucket name can only contain lower case characters, numbers, dots, and hyphens")
+		}
+		if idx > 0 && (ch == '.' && name[idx-1] == '.') {
+			return fmt.Errorf("bucket names must not contain two adjacent periods")
+		}
+		//TODO buckets with s3 transfer accleration cannot have . in name
+	}
+	if name[0] == '.' || name[0] == '-' {
+		return fmt.Errorf("name must start with number or lower case character")
+	}
+	if name[len(name)-1] == '.' || name[len(name)-1] == '-' {
+		return fmt.Errorf("name must end with number or lower case character")
+	}
+	if strings.HasPrefix(name, "xn--") {
+		return fmt.Errorf("prefix xn-- is a reserved and not allowed in bucket prefix")
+	}
+	if strings.HasSuffix(name, "-s3alias") {
+		return fmt.Errorf("suffix -s3alias is a reserved and not allowed in bucket suffix")
+	}
+	if net.ParseIP(name) != nil {
+		return fmt.Errorf("bucket name cannot be ip addresses")
+	}
+	return nil
+}