feat: add an annotation for ignoring URI case in HTTP match (#174)

Signed-off-by: charlie <qianglin98@qq.com>

pkg/ingress/kube/annotations/annotations.go

@@ -63,6 +63,8 @@ type Ingress struct {
 	Auth *AuthConfig
 
 	Destination *DestinationConfig
+
+	IgnoreCase *IgnoreCaseConfig
 }
 
 func (i *Ingress) NeedRegexMatch() bool {
@@ -132,6 +134,7 @@ func NewAnnotationHandlerManager() AnnotationHandler {
 			fallback{},
 			auth{},
 			destination{},
+			ignoreCaseMatching{},
 		},
 		gatewayHandlers: []GatewayHandler{
 			downstreamTLS{},
@@ -146,6 +149,7 @@ func NewAnnotationHandlerManager() AnnotationHandler {
 			ipAccessControl{},
 			retry{},
 			fallback{},
+			ignoreCaseMatching{},
 		},
 		trafficPolicyHandlers: []TrafficPolicyHandler{
 			upstreamTLS{},

pkg/ingress/kube/annotations/ignore_case.go

@@ -0,0 +1,54 @@
+// Copyright (c) 2022 Alibaba Group Holding Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package annotations
+
+import (
+	networking "istio.io/api/networking/v1alpha3"
+)
+
+const (
+	enableIgnoreCase = "ignore-path-case"
+)
+
+type IgnoreCaseConfig struct {
+	IgnoreUriCase bool
+}
+
+type ignoreCaseMatching struct{}
+
+func (m ignoreCaseMatching) ApplyRoute(route *networking.HTTPRoute, config *Ingress) {
+	if config == nil || config.IgnoreCase == nil || !config.IgnoreCase.IgnoreUriCase {
+		return
+	}
+
+	for _, v := range route.Match {
+		v.IgnoreUriCase = true
+	}
+}
+
+func (m ignoreCaseMatching) Parse(annotations Annotations, config *Ingress, _ *GlobalContext) error {
+	if !needIgnoreCaseMatch(annotations) {
+		return nil
+	}
+
+	config.IgnoreCase = &IgnoreCaseConfig{}
+	config.IgnoreCase.IgnoreUriCase, _ = annotations.ParseBoolASAP(enableIgnoreCase)
+
+	return nil
+}
+
+func needIgnoreCaseMatch(annotation Annotations) bool {
+	return annotation.HasASAP(enableIgnoreCase)
+}

pkg/ingress/kube/annotations/ignore_case_test.go

@@ -0,0 +1,135 @@
+// Copyright (c) 2022 Alibaba Group Holding Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package annotations
+
+import (
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+
+	networking "istio.io/api/networking/v1alpha3"
+)
+
+func TestIgnoreCaseMatching_ApplyRoute(t *testing.T) {
+	handler := ignoreCaseMatching{}
+
+	testCases := []struct {
+		input  *networking.HTTPRoute
+		config *Ingress
+		expect *networking.HTTPRoute
+	}{
+		{
+			input: &networking.HTTPRoute{
+				Match: []*networking.HTTPMatchRequest{
+					{
+						Uri: &networking.StringMatch{
+							MatchType: &networking.StringMatch_Exact{Exact: "/abc"},
+						},
+						IgnoreUriCase: false,
+					},
+				},
+			},
+			config: &Ingress{
+				IgnoreCase: &IgnoreCaseConfig{IgnoreUriCase: true},
+			},
+			expect: &networking.HTTPRoute{
+				Match: []*networking.HTTPMatchRequest{
+					{
+						Uri: &networking.StringMatch{
+							MatchType: &networking.StringMatch_Exact{Exact: "/abc"},
+						},
+						IgnoreUriCase: true,
+					},
+				},
+			},
+		},
+		{
+			input: &networking.HTTPRoute{
+				Match: []*networking.HTTPMatchRequest{
+					{
+						Uri: &networking.StringMatch{
+							MatchType: &networking.StringMatch_Exact{Exact: "/abc"},
+						},
+						IgnoreUriCase: false,
+					},
+				},
+			},
+			config: &Ingress{
+				IgnoreCase: &IgnoreCaseConfig{IgnoreUriCase: false},
+			},
+			expect: &networking.HTTPRoute{
+				Match: []*networking.HTTPMatchRequest{
+					{
+						Uri: &networking.StringMatch{
+							MatchType: &networking.StringMatch_Exact{Exact: "/abc"},
+						},
+						IgnoreUriCase: false,
+					},
+				},
+			},
+		},
+	}
+
+	t.Run("", func(t *testing.T) {
+		for _, tt := range testCases {
+			handler.ApplyRoute(tt.input, tt.config)
+
+			if diff := cmp.Diff(tt.expect, tt.input); diff != "" {
+				t.Fatalf("TestIgnoreCaseMatching_ApplyRoute() mismatch(-want +got): \n%s", diff)
+			}
+		}
+	})
+}
+
+func TestIgnoreCaseMatching_Parse(t *testing.T) {
+	parser := ignoreCaseMatching{}
+
+	testCases := []struct {
+		input  Annotations
+		expect *IgnoreCaseConfig
+	}{
+		{
+			input:  Annotations{},
+			expect: nil,
+		},
+		{
+			input: Annotations{
+				buildHigressAnnotationKey(enableIgnoreCase): "true",
+			},
+			expect: &IgnoreCaseConfig{
+				IgnoreUriCase: true,
+			},
+		},
+		{
+			input: Annotations{
+				buildHigressAnnotationKey(enableIgnoreCase): "false",
+			},
+			expect: &IgnoreCaseConfig{
+				IgnoreUriCase: false,
+			},
+		},
+	}
+
+	t.Run("", func(t *testing.T) {
+		for _, tt := range testCases {
+			config := &Ingress{}
+
+			_ = parser.Parse(tt.input, config, nil)
+			if diff := cmp.Diff(tt.expect, config.IgnoreCase); diff != "" {
+				t.Fatalf("TestIgnoreCaseMatching_Parse() mismatch(-want +got): \n%s", diff)
+			}
+		}
+	})
+}