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Improve "invalid reference" error message

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Use the same error message as is used in
docker/reference/reference.go to provide
slightly more information about the error.

This change tests if the reference passes
after lowercasing its characters, to determine
if the reference was invalid due to
it containing uppercase characters.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn 2016-08-11 15:30:17 +02:00
parent 5e8d18f615
commit 744ae974a5
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GPG key ID: 76698F39D527CE8C
2 changed files with 26 additions and 1 deletions
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8
reference/reference.go
View file

@ -24,6 +24,7 @@ package reference
import (
"errors"
"fmt"
"strings"
"github.com/docker/distribution/digest"
)
@ -43,6 +44,9 @@ var (
// ErrDigestInvalidFormat represents an error while trying to parse a string as a tag.
ErrDigestInvalidFormat = errors.New("invalid digest format")
// ErrNameContainsUppercase is returned for invalid repository names that contain uppercase characters.
ErrNameContainsUppercase = errors.New("repository name must be lowercase")
// ErrNameEmpty is returned for empty, invalid repository names.
ErrNameEmpty = errors.New("repository name must have at least one component")
@ -149,7 +153,9 @@ func Parse(s string) (Reference, error) {
if s == "" {
return nil, ErrNameEmpty
}
// TODO(dmcgowan): Provide more specific and helpful error
if ReferenceRegexp.FindStringSubmatch(strings.ToLower(s)) != nil {
return nil, ErrNameContainsUppercase
}
return nil, ErrReferenceInvalidFormat
}

19
reference/reference_test.go
View file

@ -95,6 +95,25 @@ func TestReferenceParse(t *testing.T) {
input: "validname@invaliddigest:ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
err: digest.ErrDigestUnsupported,
},
{
input: "Uppercase:tag",
err: ErrNameContainsUppercase,
},
// FIXME "Uppercase" is incorrectly handled as a domain-name here, therefore passes.
// See https://github.com/docker/distribution/pull/1778, and https://github.com/docker/docker/pull/20175
//{
// input: "Uppercase/lowercase:tag",
// err: ErrNameContainsUppercase,
//},
{
input: "test:5000/Uppercase/lowercase:tag",
err: ErrNameContainsUppercase,
},
{
input: "lowercase:Uppercase",
repository: "lowercase",
tag: "Uppercase",
},
{
input: strings.Repeat("a/", 128) + "a:tag",
err: ErrNameTooLong,