Try to parse the type of the artifact based on the media type when no resolver found

Try to parse the type of the artifact based on the media type when no resolver found, if parse failed, set it's type to unknown. This won't block the pushing for artifacts that has no resolver registered in Harbor

Signed-off-by: Wenkai Yin <yinw@vmware.com>

src/api/artifact/abstractor/abstractor.go

@@ -26,8 +26,15 @@ import (
 	"github.com/goharbor/harbor/src/pkg/artifact"
 	"github.com/goharbor/harbor/src/pkg/repository"
 	"github.com/opencontainers/image-spec/specs-go/v1"
+	"regexp"
+	"strings"
 )
 
+// ArtifactTypeUnknown defines the type for the unknown artifacts
+const ArtifactTypeUnknown = "UNKNOWN"
+
+var artifactTypeRegExp = regexp.MustCompile(`^application/vnd\.[^.]*\.(.*)\.config\.[^.]*\+json$`)
+
 // Abstractor abstracts the specific information for different types of artifacts
 type Abstractor interface {
 	// Abstract the specific information for the specific artifact type into the artifact model,
@@ -109,10 +116,22 @@ func (a *abstractor) Abstract(ctx context.Context, artifact *artifact.Artifact)
 		return fmt.Errorf("unsupported manifest media type: %s", artifact.ManifestMediaType)
 	}
 
-	resolver, err := resolver.Get(artifact.MediaType)
-	if err != nil {
-		return err
+	resolver := resolver.Get(artifact.MediaType)
+	if resolver != nil {
+		artifact.Type = resolver.ArtifactType()
+		return resolver.Resolve(ctx, content, artifact)
 	}
-	artifact.Type = resolver.ArtifactType()
-	return resolver.Resolve(ctx, content, artifact)
+
+	// if got no resolver, try to parse the artifact type based on the media type
+	artifact.Type = parseArtifactType(artifact.MediaType)
+	return nil
+}
+
+func parseArtifactType(mediaType string) string {
+	strs := artifactTypeRegExp.FindStringSubmatch(mediaType)
+	if len(strs) == 2 {
+		return strings.ToUpper(strs[1])
+	}
+	// can not get the artifact type from the media type, return unknown
+	return ArtifactTypeUnknown
 }

src/api/artifact/abstractor/abstractor_test.go

@@ -294,6 +294,28 @@ func (a *abstractorTestSuite) TestAbstractUnsupported() {
 	a.fetcher.AssertExpectations(a.T())
 }
 
+func (a *abstractorTestSuite) TestParseArtifactType() {
+	mediaType := ""
+	typee := parseArtifactType(mediaType)
+	a.Equal(ArtifactTypeUnknown, typee)
+
+	mediaType = "unknown"
+	typee = parseArtifactType(mediaType)
+	a.Equal(ArtifactTypeUnknown, typee)
+
+	mediaType = "application/vnd.oci.image.config.v1+json"
+	typee = parseArtifactType(mediaType)
+	a.Equal("IMAGE", typee)
+
+	mediaType = "application/vnd.cncf.helm.chart.config.v1+json"
+	typee = parseArtifactType(mediaType)
+	a.Equal("HELM.CHART", typee)
+
+	mediaType = "application/vnd.sylabs.sif.config.v1+json"
+	typee = parseArtifactType(mediaType)
+	a.Equal("SIF", typee)
+}
+
 func TestAbstractorTestSuite(t *testing.T) {
 	suite.Run(t, &abstractorTestSuite{})
 }

src/api/artifact/abstractor/resolver/resolver.go

@@ -49,10 +49,6 @@ func Register(resolver Resolver, mediaTypes ...string) error {
 }
 
 // Get the resolver according to the media type
-func Get(mediaType string) (Resolver, error) {
-	resolver, exist := registry[mediaType]
-	if !exist {
-		return nil, fmt.Errorf("resolver resolves %s not found", mediaType)
-	}
-	return resolver, nil
+func Get(mediaType string) Resolver {
+	return registry[mediaType]
 }

src/api/artifact/abstractor/resolver/resolver_test.go

@@ -11,10 +11,22 @@
 package resolver
 
 import (
+	"context"
+	"github.com/goharbor/harbor/src/pkg/artifact"
 	"github.com/stretchr/testify/suite"
 	"testing"
 )
 
+type fakeResolver struct{}
+
+func (f *fakeResolver) ArtifactType() string {
+	return ""
+
+}
+func (f *fakeResolver) Resolve(ctx context.Context, manifest []byte, artifact *artifact.Artifact) error {
+	return nil
+}
+
 type resolverTestSuite struct {
 	suite.Suite
 }
@@ -37,16 +49,16 @@ func (r *resolverTestSuite) TestRegister() {
 func (r *resolverTestSuite) TestGet() {
 	// registry a resolver
 	mediaType := "fake_media_type"
-	err := Register(nil, mediaType)
+	err := Register(&fakeResolver{}, mediaType)
 	r.Assert().Nil(err)
 
 	// get the resolver
-	_, err = Get(mediaType)
-	r.Assert().Nil(err)
+	resolver := Get(mediaType)
+	r.Assert().NotNil(resolver)
 
 	// get the not exist resolver
-	_, err = Get("not_existing_media_type")
-	r.Assert().NotNil(err)
+	resolver = Get("not_existing_media_type")
+	r.Assert().Nil(resolver)
 }
 
 func TestResolverTestSuite(t *testing.T) {