Move codes to pkg (#46)

pkg/ingress/kube/annotations/annotations.go

@@ -0,0 +1,212 @@
+// 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"
+	"istio.io/istio/pilot/pkg/util/sets"
+	listersv1 "k8s.io/client-go/listers/core/v1"
+)
+
+type GlobalContext struct {
+	// secret key is cluster/namespace/name
+	WatchedSecrets sets.Set
+
+	ClusterSecretLister map[string]listersv1.SecretLister
+
+	ClusterServiceList map[string]listersv1.ServiceLister
+}
+
+type Meta struct {
+	Namespace    string
+	Name         string
+	RawClusterId string
+	ClusterId    string
+}
+
+// Ingress defines the valid annotations present in one NGINX Ingress.
+type Ingress struct {
+	Meta
+
+	Cors *CorsConfig
+
+	Rewrite *RewriteConfig
+
+	Redirect *RedirectConfig
+
+	UpstreamTLS *UpstreamTLSConfig
+
+	DownstreamTLS *DownstreamTLSConfig
+
+	Canary *CanaryConfig
+
+	IPAccessControl *IPAccessControlConfig
+
+	HeaderControl *HeaderControlConfig
+
+	Timeout *TimeoutConfig
+
+	Retry *RetryConfig
+
+	LoadBalance *LoadBalanceConfig
+
+	localRateLimit *localRateLimitConfig
+
+	Fallback *FallbackConfig
+
+	Auth *AuthConfig
+}
+
+func (i *Ingress) NeedRegexMatch() bool {
+	if i.Rewrite == nil {
+		return false
+	}
+
+	return i.Rewrite.RewriteTarget != "" || i.Rewrite.UseRegex
+}
+
+func (i *Ingress) IsCanary() bool {
+	if i.Canary == nil {
+		return false
+	}
+
+	return i.Canary.Enabled
+}
+
+// CanaryKind return byHeader, byWeight
+func (i *Ingress) CanaryKind() (bool, bool) {
+	if !i.IsCanary() {
+		return false, false
+	}
+
+	// first header, cookie
+	if i.Canary.Header != "" || i.Canary.Cookie != "" {
+		return true, false
+	}
+
+	// then weight
+	return false, true
+}
+
+func (i *Ingress) NeedTrafficPolicy() bool {
+	return i.UpstreamTLS != nil ||
+		i.LoadBalance != nil
+}
+
+func (i *Ingress) MergeHostIPAccessControlIfNotExist(ac *IPAccessControlConfig) {
+	if i.IPAccessControl != nil && i.IPAccessControl.Domain != nil {
+		return
+	}
+
+	if ac != nil && ac.Domain != nil {
+		if i.IPAccessControl == nil {
+			i.IPAccessControl = &IPAccessControlConfig{
+				Domain: ac.Domain,
+			}
+		} else {
+			i.IPAccessControl.Domain = ac.Domain
+		}
+	}
+}
+
+type AnnotationHandler interface {
+	Parser
+	GatewayHandler
+	VirtualServiceHandler
+	RouteHandler
+	TrafficPolicyHandler
+}
+
+type AnnotationHandlerManager struct {
+	parsers                []Parser
+	gatewayHandlers        []GatewayHandler
+	virtualServiceHandlers []VirtualServiceHandler
+	routeHandlers          []RouteHandler
+	trafficPolicyHandlers  []TrafficPolicyHandler
+}
+
+func NewAnnotationHandlerManager() AnnotationHandler {
+	return &AnnotationHandlerManager{
+		parsers: []Parser{
+			canary{},
+			cors{},
+			downstreamTLS{},
+			redirect{},
+			rewrite{},
+			upstreamTLS{},
+			ipAccessControl{},
+			headerControl{},
+			timeout{},
+			retry{},
+			loadBalance{},
+			localRateLimit{},
+			fallback{},
+			auth{},
+		},
+		gatewayHandlers: []GatewayHandler{
+			downstreamTLS{},
+		},
+		virtualServiceHandlers: []VirtualServiceHandler{
+			ipAccessControl{},
+		},
+		routeHandlers: []RouteHandler{
+			cors{},
+			redirect{},
+			rewrite{},
+			ipAccessControl{},
+			headerControl{},
+			timeout{},
+			retry{},
+			localRateLimit{},
+			fallback{},
+		},
+		trafficPolicyHandlers: []TrafficPolicyHandler{
+			upstreamTLS{},
+			loadBalance{},
+		},
+	}
+}
+
+func (h *AnnotationHandlerManager) Parse(annotations Annotations, config *Ingress, globalContext *GlobalContext) error {
+	for _, parser := range h.parsers {
+		_ = parser.Parse(annotations, config, globalContext)
+	}
+
+	return nil
+}
+
+func (h *AnnotationHandlerManager) ApplyGateway(gateway *networking.Gateway, config *Ingress) {
+	for _, handler := range h.gatewayHandlers {
+		handler.ApplyGateway(gateway, config)
+	}
+}
+
+func (h *AnnotationHandlerManager) ApplyVirtualServiceHandler(virtualService *networking.VirtualService, config *Ingress) {
+	for _, handler := range h.virtualServiceHandlers {
+		handler.ApplyVirtualServiceHandler(virtualService, config)
+	}
+}
+
+func (h *AnnotationHandlerManager) ApplyRoute(route *networking.HTTPRoute, config *Ingress) {
+	for _, handler := range h.routeHandlers {
+		handler.ApplyRoute(route, config)
+	}
+}
+
+func (h *AnnotationHandlerManager) ApplyTrafficPolicy(trafficPolicy *networking.TrafficPolicy_PortTrafficPolicy, config *Ingress) {
+	for _, handler := range h.trafficPolicyHandlers {
+		handler.ApplyTrafficPolicy(trafficPolicy, config)
+	}
+}