search: remove parsing JSON filters out of the backend

All other endpoints handle this in the API; given that the JSON format for
filters is part of the API, it makes sense to handle it there, and not have
that concept leak into further down the code.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

api/server/router/image/backend.go

@@ -37,5 +37,5 @@ type importExportBackend interface {
 type registryBackend interface {
 	PullImage(ctx context.Context, image, tag string, platform *specs.Platform, metaHeaders map[string][]string, authConfig *types.AuthConfig, outStream io.Writer) error
 	PushImage(ctx context.Context, image, tag string, metaHeaders map[string][]string, authConfig *types.AuthConfig, outStream io.Writer) error
-	SearchRegistryForImages(ctx context.Context, filtersArgs string, term string, limit int, authConfig *types.AuthConfig, metaHeaders map[string][]string) (*registry.SearchResults, error)
+	SearchRegistryForImages(ctx context.Context, searchFilters filters.Args, term string, limit int, authConfig *types.AuthConfig, metaHeaders map[string][]string) (*registry.SearchResults, error)
 }

api/server/router/image/image_routes.go

@@ -298,7 +298,12 @@ func (s *imageRouter) getImagesSearch(ctx context.Context, w http.ResponseWriter
 			return errdefs.InvalidParameter(errors.Wrap(err, "invalid limit specified"))
 		}
 	}
-	query, err := s.backend.SearchRegistryForImages(ctx, r.Form.Get("filters"), r.Form.Get("term"), limit, config, headers)
+	searchFilters, err := filters.FromJSON(r.Form.Get("filters"))
+	if err != nil {
+		return err
+	}
+
+	query, err := s.backend.SearchRegistryForImages(ctx, searchFilters, r.Form.Get("term"), limit, config, headers)
 	if err != nil {
 		return err
 	}

daemon/images/image_search.go

@@ -21,14 +21,10 @@ var acceptedSearchFilterTags = map[string]bool{
 //
 // TODO: this could be implemented in a registry service instead of the image
 // service.
-func (i *ImageService) SearchRegistryForImages(ctx context.Context, filtersArgs string, term string, limit int,
+func (i *ImageService) SearchRegistryForImages(ctx context.Context, searchFilters filters.Args, term string, limit int,
 	authConfig *types.AuthConfig,
 	headers map[string][]string) (*registrytypes.SearchResults, error) {
 
-	searchFilters, err := filters.FromJSON(filtersArgs)
-	if err != nil {
-		return nil, err
-	}
 	if err := searchFilters.Validate(acceptedSearchFilterTags); err != nil {
 		return nil, err
 	}

daemon/images/image_search_test.go

@@ -7,7 +7,9 @@ import (
 	"testing"
 
 	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/api/types/filters"
 	registrytypes "github.com/docker/docker/api/types/registry"
+	"github.com/docker/docker/errdefs"
 	"github.com/docker/docker/registry"
 )
 
@@ -21,7 +23,7 @@ type fakeService struct {
 
 func (s *fakeService) Search(ctx context.Context, term string, limit int, authConfig *types.AuthConfig, userAgent string, headers map[string][]string) (*registrytypes.SearchResults, error) {
 	if s.shouldReturnError {
-		return nil, errors.New("Search unknown error")
+		return nil, errdefs.Unknown(errors.New("search unknown error"))
 	}
 	return &registrytypes.SearchResults{
 		Query:      s.term,
@@ -32,44 +34,49 @@ func (s *fakeService) Search(ctx context.Context, term string, limit int, authCo
 
 func TestSearchRegistryForImagesErrors(t *testing.T) {
 	errorCases := []struct {
-		filtersArgs       string
+		filtersArgs       filters.Args
 		shouldReturnError bool
 		expectedError     string
 	}{
 		{
-			expectedError:     "Search unknown error",
+			expectedError:     "search unknown error",
 			shouldReturnError: true,
 		},
 		{
-			filtersArgs:   "invalid json",
-			expectedError: "invalid character 'i' looking for beginning of value",
-		},
-		{
-			filtersArgs:   `{"type":{"custom":true}}`,
+			filtersArgs:   filters.NewArgs(filters.Arg("type", "custom")),
 			expectedError: "invalid filter 'type'",
 		},
 		{
-			filtersArgs:   `{"is-automated":{"invalid":true}}`,
+			filtersArgs:   filters.NewArgs(filters.Arg("is-automated", "invalid")),
 			expectedError: "invalid filter 'is-automated=[invalid]'",
 		},
 		{
-			filtersArgs:   `{"is-automated":{"true":true,"false":true}}`,
+			filtersArgs: filters.NewArgs(
+				filters.Arg("is-automated", "true"),
+				filters.Arg("is-automated", "false"),
+			),
 			expectedError: "invalid filter 'is-automated",
 		},
 		{
-			filtersArgs:   `{"is-official":{"invalid":true}}`,
+			filtersArgs:   filters.NewArgs(filters.Arg("is-official", "invalid")),
 			expectedError: "invalid filter 'is-official=[invalid]'",
 		},
 		{
-			filtersArgs:   `{"is-official":{"true":true,"false":true}}`,
+			filtersArgs: filters.NewArgs(
+				filters.Arg("is-official", "true"),
+				filters.Arg("is-official", "false"),
+			),
 			expectedError: "invalid filter 'is-official",
 		},
 		{
-			filtersArgs:   `{"stars":{"invalid":true}}`,
+			filtersArgs:   filters.NewArgs(filters.Arg("stars", "invalid")),
 			expectedError: "invalid filter 'stars=invalid'",
 		},
 		{
-			filtersArgs:   `{"stars":{"1":true,"invalid":true}}`,
+			filtersArgs: filters.NewArgs(
+				filters.Arg("stars", "1"),
+				filters.Arg("stars", "invalid"),
+			),
 			expectedError: "invalid filter 'stars=invalid'",
 		},
 	}
@@ -86,23 +93,30 @@ func TestSearchRegistryForImagesErrors(t *testing.T) {
 		if !strings.Contains(err.Error(), e.expectedError) {
 			t.Errorf("%d: expected error to contain %s, got %s", index, e.expectedError, err.Error())
 		}
+		if e.shouldReturnError {
+			if !errdefs.IsUnknown(err) {
+				t.Errorf("%d: expected expected an errdefs.ErrUnknown, got: %T: %v", index, err, err)
+			}
+			continue
+		}
+		if !errdefs.IsInvalidParameter(err) {
+			t.Errorf("%d: expected expected an errdefs.ErrInvalidParameter, got: %T: %v", index, err, err)
+		}
 	}
 }
 
 func TestSearchRegistryForImages(t *testing.T) {
 	term := "term"
 	successCases := []struct {
-		filtersArgs     string
+		filtersArgs     filters.Args
 		registryResults []registrytypes.SearchResult
 		expectedResults []registrytypes.SearchResult
 	}{
 		{
-			filtersArgs:     "",
 			registryResults: []registrytypes.SearchResult{},
 			expectedResults: []registrytypes.SearchResult{},
 		},
 		{
-			filtersArgs: "",
 			registryResults: []registrytypes.SearchResult{
 				{
 					Name:        "name",
@@ -117,7 +131,7 @@ func TestSearchRegistryForImages(t *testing.T) {
 			},
 		},
 		{
-			filtersArgs: `{"is-automated":{"true":true}}`,
+			filtersArgs: filters.NewArgs(filters.Arg("is-automated", "true")),
 			registryResults: []registrytypes.SearchResult{
 				{
 					Name:        "name",
@@ -127,7 +141,7 @@ func TestSearchRegistryForImages(t *testing.T) {
 			expectedResults: []registrytypes.SearchResult{},
 		},
 		{
-			filtersArgs: `{"is-automated":{"true":true}}`,
+			filtersArgs: filters.NewArgs(filters.Arg("is-automated", "true")),
 			registryResults: []registrytypes.SearchResult{
 				{
 					Name:        "name",
@@ -144,7 +158,7 @@ func TestSearchRegistryForImages(t *testing.T) {
 			},
 		},
 		{
-			filtersArgs: `{"is-automated":{"false":true}}`,
+			filtersArgs: filters.NewArgs(filters.Arg("is-automated", "false")),
 			registryResults: []registrytypes.SearchResult{
 				{
 					Name:        "name",
@@ -155,7 +169,7 @@ func TestSearchRegistryForImages(t *testing.T) {
 			expectedResults: []registrytypes.SearchResult{},
 		},
 		{
-			filtersArgs: `{"is-automated":{"false":true}}`,
+			filtersArgs: filters.NewArgs(filters.Arg("is-automated", "false")),
 			registryResults: []registrytypes.SearchResult{
 				{
 					Name:        "name",
@@ -172,7 +186,7 @@ func TestSearchRegistryForImages(t *testing.T) {
 			},
 		},
 		{
-			filtersArgs: `{"is-official":{"true":true}}`,
+			filtersArgs: filters.NewArgs(filters.Arg("is-official", "true")),
 			registryResults: []registrytypes.SearchResult{
 				{
 					Name:        "name",
@@ -182,7 +196,7 @@ func TestSearchRegistryForImages(t *testing.T) {
 			expectedResults: []registrytypes.SearchResult{},
 		},
 		{
-			filtersArgs: `{"is-official":{"true":true}}`,
+			filtersArgs: filters.NewArgs(filters.Arg("is-official", "true")),
 			registryResults: []registrytypes.SearchResult{
 				{
 					Name:        "name",
@@ -199,7 +213,7 @@ func TestSearchRegistryForImages(t *testing.T) {
 			},
 		},
 		{
-			filtersArgs: `{"is-official":{"false":true}}`,
+			filtersArgs: filters.NewArgs(filters.Arg("is-official", "false")),
 			registryResults: []registrytypes.SearchResult{
 				{
 					Name:        "name",
@@ -210,7 +224,7 @@ func TestSearchRegistryForImages(t *testing.T) {
 			expectedResults: []registrytypes.SearchResult{},
 		},
 		{
-			filtersArgs: `{"is-official":{"false":true}}`,
+			filtersArgs: filters.NewArgs(filters.Arg("is-official", "false")),
 			registryResults: []registrytypes.SearchResult{
 				{
 					Name:        "name",
@@ -227,7 +241,7 @@ func TestSearchRegistryForImages(t *testing.T) {
 			},
 		},
 		{
-			filtersArgs: `{"stars":{"0":true}}`,
+			filtersArgs: filters.NewArgs(filters.Arg("stars", "0")),
 			registryResults: []registrytypes.SearchResult{
 				{
 					Name:        "name",
@@ -244,7 +258,7 @@ func TestSearchRegistryForImages(t *testing.T) {
 			},
 		},
 		{
-			filtersArgs: `{"stars":{"1":true}}`,
+			filtersArgs: filters.NewArgs(filters.Arg("stars", "1")),
 			registryResults: []registrytypes.SearchResult{
 				{
 					Name:        "name",
@@ -255,7 +269,7 @@ func TestSearchRegistryForImages(t *testing.T) {
 			expectedResults: []registrytypes.SearchResult{},
 		},
 		{
-			filtersArgs: `{"stars":{"1":true}}`,
+			filtersArgs: filters.NewArgs(filters.Arg("stars", "1")),
 			registryResults: []registrytypes.SearchResult{
 				{
 					Name:        "name0",
@@ -277,7 +291,11 @@ func TestSearchRegistryForImages(t *testing.T) {
 			},
 		},
 		{
-			filtersArgs: `{"stars":{"1":true}, "is-official":{"true":true}, "is-automated":{"true":true}}`,
+			filtersArgs: filters.NewArgs(
+				filters.Arg("stars", "1"),
+				filters.Arg("is-official", "true"),
+				filters.Arg("is-automated", "true"),
+			),
 			registryResults: []registrytypes.SearchResult{
 				{
 					Name:        "name0",