ziti/controller/internal/routes/version_router.go

/*
	Copyright NetFoundry, Inc.

	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

	https://www.apache.org/licenses/LICENSE-2.0
	https://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 routes

import (
	"github.com/go-openapi/runtime/middleware"
	"github.com/openziti/edge/controller"
	"github.com/openziti/edge/controller/env"
	"github.com/openziti/edge/controller/internal/permissions"
	"github.com/openziti/edge/controller/response"
	clientInformational "github.com/openziti/edge/rest_client_api_server/operations/informational"
	managementInformational "github.com/openziti/edge/rest_management_api_server/operations/informational"
	"github.com/openziti/edge/rest_model"
	"github.com/openziti/fabric/build"
	"github.com/openziti/fabric/xweb"
	"runtime"
	"sync"
)

func init() {
	r := NewVersionRouter()
	env.AddRouter(r)
}

type VersionRouter struct {
	BasePath           string
	cachedVersions     *rest_model.Version
	cachedVersionsOnce sync.Once
}

func NewVersionRouter() *VersionRouter {
	return &VersionRouter{
		BasePath: "/version",
	}
}

func (ir *VersionRouter) Register(ae *env.AppEnv) {
	ae.ClientApi.InformationalListVersionHandler = clientInformational.ListVersionHandlerFunc(func(params clientInformational.ListVersionParams) middleware.Responder {
		return ae.IsAllowed(ir.List, params.HTTPRequest, "", "", permissions.Always())
	})

	ae.ClientApi.InformationalListRootHandler = clientInformational.ListRootHandlerFunc(func(params clientInformational.ListRootParams) middleware.Responder {
		return ae.IsAllowed(ir.List, params.HTTPRequest, "", "", permissions.Always())
	})

	ae.ManagementApi.InformationalListVersionHandler = managementInformational.ListVersionHandlerFunc(func(params managementInformational.ListVersionParams) middleware.Responder {
		return ae.IsAllowed(ir.List, params.HTTPRequest, "", "", permissions.Always())
	})

	ae.ManagementApi.InformationalListRootHandler = managementInformational.ListRootHandlerFunc(func(params managementInformational.ListRootParams) middleware.Responder {
		return ae.IsAllowed(ir.List, params.HTTPRequest, "", "", permissions.Always())
	})
}

func (ir *VersionRouter) List(_ *env.AppEnv, rc *response.RequestContext) {
	ir.cachedVersionsOnce.Do(func() {

		buildInfo := build.GetBuildInfo()
		ir.cachedVersions = &rest_model.Version{
			BuildDate:      buildInfo.BuildDate(),
			Revision:       buildInfo.Revision(),
			RuntimeVersion: runtime.Version(),
			Version:        buildInfo.Version(),
			APIVersions: map[string]map[string]rest_model.APIVersion{
				controller.ClientApiBinding:     {controller.VersionV1: mapApiVersionToRestModel(controller.ClientRestApiBaseUrlV1)},
				controller.ManagementApiBinding: {controller.VersionV1: mapApiVersionToRestModel(controller.ManagementRestApiBaseUrlV1)},
			},
		}

		for apiBinding, apiVersionToPathMap := range controller.AllApiBindingVersions {
			ir.cachedVersions.APIVersions[apiBinding] = map[string]rest_model.APIVersion{}

			for apiVersion, apiPath := range apiVersionToPathMap {
				ir.cachedVersions.APIVersions[apiBinding][apiVersion] = mapApiVersionToRestModel(apiPath)
			}
		}

		xwebContext := xweb.WebContextFromRequestContext(rc.Request.Context())

		apiToBaseUrls := map[string]map[string]struct{}{} //api -> webListener addresses + path

		for _, webListener := range xwebContext.XWebConfig.WebListeners {
			for _, api := range webListener.APIs {
				if _, ok := apiToBaseUrls[api.Binding()]; !ok {
					apiToBaseUrls[api.Binding()] = map[string]struct{}{}
				}

				for _, bindPoint := range webListener.BindPoints {
					apiBaseUrl := bindPoint.Address + apiBindingToPath(api.Binding())
					apiToBaseUrls[api.Binding()][apiBaseUrl] = struct{}{}
				}
			}
		}

		for apiBinding, apiVersionMap := range ir.cachedVersions.APIVersions {
			for apiBaseUrl := range apiToBaseUrls[apiBinding] {
				apiVersion := apiVersionMap["v1"]
				apiVersion.APIBaseUrls = append(apiVersion.APIBaseUrls, "https://"+apiBaseUrl)
				apiVersionMap["v1"] = apiVersion
			}
		}

		ir.cachedVersions.APIVersions[controller.LegacyClientApiBinding] = ir.cachedVersions.APIVersions[controller.ClientApiBinding]
	})

	rc.RespondWithOk(ir.cachedVersions, &rest_model.Meta{})
}

func apiBindingToPath(binding string) string {
	switch binding {
	case "edge":
		return controller.ClientRestApiBaseUrlV1
	case controller.ClientApiBinding:
		return controller.ClientRestApiBaseUrlV1
	case controller.ManagementApiBinding:
		return controller.ManagementRestApiBaseUrlV1
	}
	return ""
}

func mapApiVersionToRestModel(path string) rest_model.APIVersion {
	return rest_model.APIVersion{
		Path:        &path,
		APIBaseUrls: []string{},
	}
}