func()

in frontend/pkg/frontend/routes.go [59:174]

• 95 lines of code
• 1 McCabe index (conditional complexity)

func (f *Frontend) routes(r prometheus.Registerer) *MiddlewareMux {
	// Setup metrics middleware
	metricsMiddleware := NewMetricsMiddleware(r, f.collector)

	mux := NewMiddlewareMux(
		MiddlewarePanic,
		MiddlewareReferer,
		metricsMiddleware.Metrics(),
		MiddlewareCorrelationData,
		MiddlewareTracing,
		MiddlewareLogging,
		// NOTE: register panic middlware twice.
		// Making sure we can capture paniced requests in our trace data.
		// But we also can recover if the tracing or logging middleware caused a panic.
		MiddlewarePanic,
		MiddlewareBody,
		MiddlewareLowercase,
		MiddlewareSystemData,
		MiddlewareValidateStatic,
	)

	// Unauthenticated routes
	mux.HandleFunc("/", f.NotFound)
	mux.HandleFunc(MuxPattern(http.MethodGet, "healthz"), f.Healthz)

	// List endpoints
	postMuxMiddleware := NewMiddleware(
		MiddlewareLoggingPostMux,
		MiddlewareValidateAPIVersion,
		MiddlewareValidateSubscriptionState)
	mux.Handle(
		MuxPattern(http.MethodGet, PatternSubscriptions, PatternProviders, api.ClusterResourceTypeName),
		postMuxMiddleware.HandlerFunc(f.ArmResourceList))
	mux.Handle(
		MuxPattern(http.MethodGet, PatternSubscriptions, PatternResourceGroups, PatternProviders, api.ClusterResourceTypeName),
		postMuxMiddleware.HandlerFunc(f.ArmResourceList))
	mux.Handle(
		MuxPattern(http.MethodGet, PatternSubscriptions, PatternResourceGroups, PatternProviders, PatternClusters, api.NodePoolResourceTypeName),
		postMuxMiddleware.HandlerFunc(f.ArmResourceList))

	// Resource ID endpoints
	// Request context holds an azcorearm.ResourceID
	postMuxMiddleware = NewMiddleware(
		MiddlewareResourceID,
		MiddlewareLoggingPostMux,
		MiddlewareValidateAPIVersion,
		MiddlewareLockSubscription,
		MiddlewareValidateSubscriptionState)
	mux.Handle(
		MuxPattern(http.MethodGet, PatternSubscriptions, PatternResourceGroups, PatternProviders, PatternClusters),
		postMuxMiddleware.HandlerFunc(f.ArmResourceRead))
	mux.Handle(
		MuxPattern(http.MethodPut, PatternSubscriptions, PatternResourceGroups, PatternProviders, PatternClusters),
		postMuxMiddleware.HandlerFunc(f.ArmResourceCreateOrUpdate))
	mux.Handle(
		MuxPattern(http.MethodPatch, PatternSubscriptions, PatternResourceGroups, PatternProviders, PatternClusters),
		postMuxMiddleware.HandlerFunc(f.ArmResourceCreateOrUpdate))
	mux.Handle(
		MuxPattern(http.MethodDelete, PatternSubscriptions, PatternResourceGroups, PatternProviders, PatternClusters),
		postMuxMiddleware.HandlerFunc(f.ArmResourceDelete))
	mux.Handle(
		MuxPattern(http.MethodPost, PatternSubscriptions, PatternResourceGroups, PatternProviders, PatternClusters, ActionRequestAdminCredential),
		postMuxMiddleware.HandlerFunc(f.ArmResourceActionRequestAdminCredential))
	mux.Handle(
		MuxPattern(http.MethodPost, PatternSubscriptions, PatternResourceGroups, PatternProviders, PatternClusters, ActionRevokeCredentials),
		postMuxMiddleware.HandlerFunc(f.ArmResourceActionRevokeCredentials))
	mux.Handle(
		MuxPattern(http.MethodGet, PatternSubscriptions, PatternResourceGroups, PatternProviders, PatternClusters, PatternNodePools),
		postMuxMiddleware.HandlerFunc(f.ArmResourceRead))
	mux.Handle(
		MuxPattern(http.MethodPut, PatternSubscriptions, PatternResourceGroups, PatternProviders, PatternClusters, PatternNodePools),
		postMuxMiddleware.HandlerFunc(f.CreateOrUpdateNodePool))
	mux.Handle(
		MuxPattern(http.MethodPatch, PatternSubscriptions, PatternResourceGroups, PatternProviders, PatternClusters, PatternNodePools),
		postMuxMiddleware.HandlerFunc(f.CreateOrUpdateNodePool))
	mux.Handle(
		MuxPattern(http.MethodDelete, PatternSubscriptions, PatternResourceGroups, PatternProviders, PatternClusters, PatternNodePools),
		postMuxMiddleware.HandlerFunc(f.ArmResourceDelete))

	// Operation endpoints
	postMuxMiddleware = NewMiddleware(
		MiddlewareResourceID,
		MiddlewareLoggingPostMux,
		MiddlewareValidateAPIVersion,
		MiddlewareValidateSubscriptionState)
	mux.Handle(
		MuxPattern(http.MethodGet, PatternSubscriptions, PatternProviders, PatternLocations, PatternOperationResults),
		postMuxMiddleware.HandlerFunc(f.OperationResult))
	mux.Handle(
		MuxPattern(http.MethodGet, PatternSubscriptions, PatternProviders, PatternLocations, PatternOperationStatuses),
		postMuxMiddleware.HandlerFunc(f.OperationStatus))

	// Exclude ARO-HCP API version validation for the following endpoints defined by ARM.

	// Subscription management endpoints
	postMuxMiddleware = NewMiddleware(
		MiddlewareResourceID,
		MiddlewareLoggingPostMux,
		MiddlewareLockSubscription)
	mux.Handle(
		MuxPattern(http.MethodGet, PatternSubscriptions),
		postMuxMiddleware.HandlerFunc(f.ArmSubscriptionGet))
	mux.Handle(
		MuxPattern(http.MethodPut, PatternSubscriptions),
		postMuxMiddleware.HandlerFunc(f.ArmSubscriptionPut))

	// Deployment preflight endpoint
	postMuxMiddleware = NewMiddleware(
		MiddlewareLoggingPostMux,
		MiddlewareValidateSubscriptionState)
	mux.Handle(
		MuxPattern(http.MethodPost, PatternSubscriptions, PatternResourceGroups, "providers", api.ProviderNamespace, PatternDeployments, "preflight"),
		postMuxMiddleware.HandlerFunc(f.ArmDeploymentPreflight))

	return mux
}