E2Manager/controllers/nodeb_controller.go - oransc/ric-plt/e2mgr - Gitiles

 //
 // Copyright 2019 AT&T Intellectual Property
 // Copyright 2019 Nokia
 // Copyright (c) 2020 Samsung Electronics Co., Ltd. All Rights Reserved.
 //
 // 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.

 //  This source code is part of the near-RT RIC (RAN Intelligent Controller)
 //  platform project (RICP).

 package controllers

 import (
 	"e2mgr/e2managererrors"
 	"e2mgr/logger"
 	"e2mgr/models"
 	"e2mgr/providers/httpmsghandlerprovider"
 	"encoding/json"
 	"gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/entities"
 	"github.com/golang/protobuf/jsonpb"
 	"github.com/golang/protobuf/proto"
 	"github.com/gorilla/mux"
 	"io"
 	"io/ioutil"
 	"net/http"
 	"net/http/httputil"
 	"strings"
 )

 const (
 	ParamRanName = "ranName"
 	LimitRequest = 2000
 )
 const ApplicationJson = "application/json"
 const ContentType = "Content-Type"

 type INodebController interface {
 	Shutdown(writer http.ResponseWriter, r *http.Request)
 	X2Reset(writer http.ResponseWriter, r *http.Request)
 	GetNodeb(writer http.ResponseWriter, r *http.Request)
 	UpdateGnb(writer http.ResponseWriter, r *http.Request)
 	UpdateEnb(writer http.ResponseWriter, r *http.Request)
 	GetNodebIdList(writer http.ResponseWriter, r *http.Request)
 	GetNodebId(writer http.ResponseWriter, r *http.Request)
 	SetGeneralConfiguration(writer http.ResponseWriter, r *http.Request)
 	AddEnb(writer http.ResponseWriter, r *http.Request)
 	DeleteEnb(writer http.ResponseWriter, r *http.Request)
 	HealthCheckRequest(writer http.ResponseWriter, r *http.Request)
 }

 type NodebController struct {
 	logger          *logger.Logger
 	handlerProvider *httpmsghandlerprovider.IncomingRequestHandlerProvider
 }

 func NewNodebController(logger *logger.Logger, handlerProvider *httpmsghandlerprovider.IncomingRequestHandlerProvider) *NodebController {
 	return &NodebController{
 		logger:          logger,
 		handlerProvider: handlerProvider,
 	}
 }

 func (c *NodebController) GetNodebIdList(writer http.ResponseWriter, r *http.Request) {
 	c.logger.Infof("[Client -> E2 Manager] #NodebController.GetNodebIdList - request: %v", c.prettifyRequest(r))

 	c.handleRequest(writer, &r.Header, httpmsghandlerprovider.GetNodebIdListRequest, nil, false, http.StatusOK)
 }

 func (c *NodebController) GetNodebId(writer http.ResponseWriter, r *http.Request) {
 	c.logger.Infof("[Client -> E2 Manager] #NodebController.GetNodebId - request: %v", c.prettifyRequest(r))
 	vars := mux.Vars(r)
 	ranName := vars["ranName"]
 	request := models.GetNodebIdRequest{RanName: ranName}

 	c.handleRequest(writer, &r.Header, httpmsghandlerprovider.GetNodebIdRequest, request, false, http.StatusOK)
 }

 func (c *NodebController) GetNodeb(writer http.ResponseWriter, r *http.Request) {
 	c.logger.Infof("[Client -> E2 Manager] #NodebController.GetNodeb - request: %v", c.prettifyRequest(r))
 	vars := mux.Vars(r)
 	ranName := vars["ranName"]
 	request := models.GetNodebRequest{RanName: ranName}
 	c.handleRequest(writer, &r.Header, httpmsghandlerprovider.GetNodebRequest, request, false, http.StatusOK)
 }

 func (c *NodebController) UpdateGnb(writer http.ResponseWriter, r *http.Request) {
 	c.logger.Infof("[Client -> E2 Manager] #NodebController.UpdateGnb - request: %v", c.prettifyRequest(r))
 	vars := mux.Vars(r)
 	ranName := vars[ParamRanName]

 	request := models.UpdateGnbRequest{}

 	gnb := entities.Gnb{}

 	if !c.extractRequestBodyToProto(r, &gnb, writer) {
 		return
 	}

 	request.Gnb = &gnb
 	request.RanName = ranName
 	c.handleRequest(writer, &r.Header, httpmsghandlerprovider.UpdateGnbRequest, &request, true, http.StatusOK)
 }

 func (c *NodebController) UpdateEnb(writer http.ResponseWriter, r *http.Request) {
 	c.logger.Infof("[Client -> E2 Manager] #NodebController.UpdateEnb - request: %v", c.prettifyRequest(r))

 	defer r.Body.Close()
 	body, err := ioutil.ReadAll(r.Body)

 	if err != nil {
 		c.logger.Errorf("[Client -> E2 Manager] #NodebController.UpdateEnb - unable to read request body - error: %s", err)
 		c.handleErrorResponse(e2managererrors.NewInvalidJsonError(), writer)
 		return
 	}

 	updateEnbRequest := models.UpdateEnbRequest{}
 	err = json.Unmarshal(body, &updateEnbRequest)

 	if err != nil {
 		c.logger.Errorf("[Client -> E2 Manager] #NodebController.UpdateEnb - unable to unmarshal json - error: %s", err)
 		c.handleErrorResponse(e2managererrors.NewInvalidJsonError(), writer)
 		return
 	}

 	vars := mux.Vars(r)
 	ranName := vars[ParamRanName]

 	updateEnbRequest.RanName = ranName

 	c.handleRequest(writer, &r.Header, httpmsghandlerprovider.UpdateEnbRequest, &updateEnbRequest, true, http.StatusOK)
 }

 func (c *NodebController) AddEnb(writer http.ResponseWriter, r *http.Request) {
 	c.logger.Infof("[Client -> E2 Manager] #NodebController.AddEnb - request: %v", c.prettifyRequest(r))

 	defer r.Body.Close()
 	body, err := ioutil.ReadAll(r.Body)

 	if err != nil {
 		c.logger.Errorf("[Client -> E2 Manager] #NodebController.AddEnb - unable to read request body - error: %s", err)
 		c.handleErrorResponse(e2managererrors.NewInvalidJsonError(), writer)
 		return
 	}

 	addEnbRequest := models.AddEnbRequest{}
 	err = json.Unmarshal(body, &addEnbRequest)

 	if err != nil {
 		c.logger.Errorf("[Client -> E2 Manager] #NodebController.AddEnb - unable to unmarshal json - error: %s", err)
 		c.handleErrorResponse(e2managererrors.NewInvalidJsonError(), writer)
 		return
 	}

 	c.handleRequest(writer, &r.Header, httpmsghandlerprovider.AddEnbRequest, &addEnbRequest, true, http.StatusCreated)
 }

 func (c *NodebController) DeleteEnb(writer http.ResponseWriter, r *http.Request) {
 	c.logger.Infof("[Client -> E2 Manager] #NodebController.DeleteEnb - request: %v", c.prettifyRequest(r))
 	vars := mux.Vars(r)
 	ranName := vars["ranName"]
 	request := &models.DeleteEnbRequest{RanName: ranName}
 	c.handleRequest(writer, &r.Header, httpmsghandlerprovider.DeleteEnbRequest, request, true, http.StatusNoContent)
 }

 func (c *NodebController) SetGeneralConfiguration(writer http.ResponseWriter, r *http.Request) {
 	c.logger.Infof("[Client -> E2 Manager] #NodebController.SetGeneralConfiguration - request: %v", c.prettifyRequest(r))

 	request := models.GeneralConfigurationRequest{}

 	if !c.extractJsonBodyDisallowUnknownFields(r, &request, writer) {
 		return
 	}
 	c.handleRequest(writer, &r.Header, httpmsghandlerprovider.SetGeneralConfigurationRequest, request, false, http.StatusOK)
 }

 func (c *NodebController) Shutdown(writer http.ResponseWriter, r *http.Request) {
 	c.logger.Infof("[Client -> E2 Manager] #NodebController.Shutdown - request: %v", c.prettifyRequest(r))
 	c.handleRequest(writer, &r.Header, httpmsghandlerprovider.ShutdownRequest, nil, false, http.StatusNoContent)
 }

 func (c *NodebController) X2Reset(writer http.ResponseWriter, r *http.Request) {
 	c.logger.Infof("[Client -> E2 Manager] #NodebController.X2Reset - request: %v", c.prettifyRequest(r))
 	request := models.ResetRequest{}
 	vars := mux.Vars(r)
 	ranName := vars[ParamRanName]

 	if err := c.extractJsonBody(r, &request); err != nil {
 		c.handleErrorResponse(err, writer)
 		return
 	}
 	request.RanName = ranName
 	c.handleRequest(writer, &r.Header, httpmsghandlerprovider.ResetRequest, request, false, http.StatusNoContent)
 }

 func (c *NodebController) HealthCheckRequest(writer http.ResponseWriter, r *http.Request) {
 	c.logger.Infof("[Client -> E2 Manager] #NodebController.HealthCheckRequest - request: %v", c.prettifyRequest(r))

 	request := models.HealthCheckRequest{}

 	if err := c.extractJsonBody(r, &request); err != nil {
 		c.handleErrorResponse(err, writer)
 		return
 	}

 	c.handleRequest(writer, &r.Header, httpmsghandlerprovider.HealthCheckRequest, request, true, http.StatusAccepted)
 }

 func (c *NodebController) extractRequestBodyToProto(r *http.Request, pb proto.Message, writer http.ResponseWriter) bool {
 	defer r.Body.Close()

 	err := jsonpb.Unmarshal(r.Body, pb)

 	if err != nil {
 		c.logger.Errorf("[Client -> E2 Manager] #NodebController.extractJsonBody - unable to extract json body - error: %s", err)
 		c.handleErrorResponse(e2managererrors.NewInvalidJsonError(), writer)
 		return false
 	}

 	return true
 }

 func (c *NodebController) extractJsonBodyDisallowUnknownFields(r *http.Request, request models.Request, writer http.ResponseWriter) bool {
 	defer r.Body.Close()

 	decoder := json.NewDecoder(r.Body)
 	decoder.DisallowUnknownFields()

 	if err := decoder.Decode(&request); err != nil {
 		c.logger.Errorf("[Client -> E2 Manager] #NodebController.extractJsonBody - unable to extract json body - error: %s", err)
 		c.handleErrorResponse(e2managererrors.NewInvalidJsonError(), writer)
 		return false
 	}

 	return true
 }

 func (c *NodebController) extractJsonBody(r *http.Request, request models.Request) error {
 	defer r.Body.Close()
 	body, err := ioutil.ReadAll(io.LimitReader(r.Body, LimitRequest))

 	if err != nil {
 		c.logger.Errorf("[Client -> E2 Manager] #NodebController.extractJsonBody - unable to extract json body - error: %s", err)
 		return e2managererrors.NewInvalidJsonError()
 	}

 	err = json.Unmarshal(body, &request)
 	if err != nil {
 		c.logger.Errorf("[Client -> E2 Manager] #NodebController.extractJsonBody - unable to extract json body - error: %s", err)
 		return e2managererrors.NewInvalidJsonError()
 	}

 	return nil
 }

 func (c *NodebController) handleRequest(writer http.ResponseWriter, header *http.Header, requestName httpmsghandlerprovider.IncomingRequest, request models.Request, validateRequestHeaders bool, successStatusCode int) {

 	if validateRequestHeaders {

 		err := c.validateRequestHeader(header)
 		if err != nil {
 			c.handleErrorResponse(err, writer)
 			return
 		}
 	}

 	handler, err := c.handlerProvider.GetHandler(requestName)

 	if err != nil {
 		c.handleErrorResponse(err, writer)
 		return
 	}

 	response, err := handler.Handle(request)

 	if err != nil {
 		c.handleErrorResponse(err, writer)
 		return
 	}

 	if successStatusCode == http.StatusNoContent {
 		writer.WriteHeader(successStatusCode)
 		c.logger.Infof("[E2 Manager -> Client] #NodebController.handleRequest - status response: %v", http.StatusNoContent)
 		return
 	}

 	result, err := response.Marshal()

 	if err != nil {
 		c.handleErrorResponse(err, writer)
 		return
 	}

 	c.logger.Infof("[E2 Manager -> Client] #NodebController.handleRequest - response: %s", result)
 	writer.Header().Set(ContentType, ApplicationJson)
 	writer.WriteHeader(successStatusCode)
 	writer.Write(result)
 }

 func (c *NodebController) validateRequestHeader(header *http.Header) error {

 	if header.Get(ContentType) != ApplicationJson {
 		c.logger.Errorf("#NodebController.validateRequestHeader - validation failure, incorrect content type")

 		return e2managererrors.NewHeaderValidationError()
 	}
 	return nil
 }

 func (c *NodebController) handleErrorResponse(err error, writer http.ResponseWriter) {

 	var errorResponseDetails models.ErrorResponse
 	var httpError int

 	if err != nil {
 		switch err.(type) {
 		case *e2managererrors.RnibDbError:
 			e2Error, _ := err.(*e2managererrors.RnibDbError)
 			errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
 			httpError = http.StatusInternalServerError
 		case *e2managererrors.CommandAlreadyInProgressError:
 			e2Error, _ := err.(*e2managererrors.CommandAlreadyInProgressError)
 			errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
 			httpError = http.StatusMethodNotAllowed
 		case *e2managererrors.HeaderValidationError:
 			e2Error, _ := err.(*e2managererrors.HeaderValidationError)
 			errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
 			httpError = http.StatusUnsupportedMediaType
 		case *e2managererrors.WrongStateError:
 			e2Error, _ := err.(*e2managererrors.WrongStateError)
 			errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
 			httpError = http.StatusBadRequest
 		case *e2managererrors.RequestValidationError:
 			e2Error, _ := err.(*e2managererrors.RequestValidationError)
 			errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
 			httpError = http.StatusBadRequest
 		case *e2managererrors.InvalidJsonError:
 			e2Error, _ := err.(*e2managererrors.InvalidJsonError)
 			errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
 			httpError = http.StatusBadRequest
 		case *e2managererrors.RmrError:
 			e2Error, _ := err.(*e2managererrors.RmrError)
 			errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
 			httpError = http.StatusInternalServerError
 		case *e2managererrors.ResourceNotFoundError:
 			e2Error, _ := err.(*e2managererrors.ResourceNotFoundError)
 			errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
 			httpError = http.StatusNotFound
 		case *e2managererrors.E2TInstanceAbsenceError:
 			e2Error, _ := err.(*e2managererrors.E2TInstanceAbsenceError)
 			errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
 			httpError = http.StatusServiceUnavailable
 		case *e2managererrors.RoutingManagerError:
 			e2Error, _ := err.(*e2managererrors.RoutingManagerError)
 			errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
 			httpError = http.StatusServiceUnavailable
 		case *e2managererrors.NodebExistsError:
 			e2Error, _ := err.(*e2managererrors.NodebExistsError)
 			errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
 			httpError = http.StatusBadRequest
 		case *e2managererrors.NoConnectedRanError:
 			e2Error, _ := err.(*e2managererrors.NoConnectedRanError)
 			errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
 			httpError = http.StatusNotFound
 		default:
 			e2Error := e2managererrors.NewInternalError()
 			errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
 			httpError = http.StatusInternalServerError
 		}
 	}
 	errorResponse, _ := json.Marshal(errorResponseDetails)

 	c.logger.Errorf("[E2 Manager -> Client] #NodebController.handleErrorResponse - http status: %d, error response: %+v", httpError, errorResponseDetails)

 	writer.Header().Set(ContentType, ApplicationJson)
 	writer.WriteHeader(httpError)
 	_, err = writer.Write(errorResponse)
 }

 func (c *NodebController) prettifyRequest(request *http.Request) string {
 	dump, _ := httputil.DumpRequest(request, true)
 	requestPrettyPrint := strings.Replace(string(dump), "\r\n", " ", -1)
 	return strings.Replace(requestPrettyPrint, "\n", "", -1)
 }
	//
	// Copyright 2019 AT&T Intellectual Property
	// Copyright 2019 Nokia
	// Copyright (c) 2020 Samsung Electronics Co., Ltd. All Rights Reserved.
	//
	// 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.

	// This source code is part of the near-RT RIC (RAN Intelligent Controller)
	// platform project (RICP).

	package controllers

	import (
	"e2mgr/e2managererrors"
	"e2mgr/logger"
	"e2mgr/models"
	"e2mgr/providers/httpmsghandlerprovider"
	"encoding/json"
	"gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/entities"
	"github.com/golang/protobuf/jsonpb"
	"github.com/golang/protobuf/proto"
	"github.com/gorilla/mux"
	"io"
	"io/ioutil"
	"net/http"
	"net/http/httputil"
	"strings"
	)

	const (
	ParamRanName = "ranName"
	LimitRequest = 2000
	)
	const ApplicationJson = "application/json"
	const ContentType = "Content-Type"

	type INodebController interface {
	Shutdown(writer http.ResponseWriter, r *http.Request)
	X2Reset(writer http.ResponseWriter, r *http.Request)
	GetNodeb(writer http.ResponseWriter, r *http.Request)
	UpdateGnb(writer http.ResponseWriter, r *http.Request)
	UpdateEnb(writer http.ResponseWriter, r *http.Request)
	GetNodebIdList(writer http.ResponseWriter, r *http.Request)
	GetNodebId(writer http.ResponseWriter, r *http.Request)
	SetGeneralConfiguration(writer http.ResponseWriter, r *http.Request)
	AddEnb(writer http.ResponseWriter, r *http.Request)
	DeleteEnb(writer http.ResponseWriter, r *http.Request)
	HealthCheckRequest(writer http.ResponseWriter, r *http.Request)
	}

	type NodebController struct {
	logger *logger.Logger
	handlerProvider *httpmsghandlerprovider.IncomingRequestHandlerProvider
	}

	func NewNodebController(logger logger.Logger, handlerProvider httpmsghandlerprovider.IncomingRequestHandlerProvider) *NodebController {
	return &NodebController{
	logger: logger,
	handlerProvider: handlerProvider,
	}
	}

	func (c NodebController) GetNodebIdList(writer http.ResponseWriter, r http.Request) {
	c.logger.Infof("[Client -> E2 Manager] #NodebController.GetNodebIdList - request: %v", c.prettifyRequest(r))

	c.handleRequest(writer, &r.Header, httpmsghandlerprovider.GetNodebIdListRequest, nil, false, http.StatusOK)
	}

	func (c NodebController) GetNodebId(writer http.ResponseWriter, r http.Request) {
	c.logger.Infof("[Client -> E2 Manager] #NodebController.GetNodebId - request: %v", c.prettifyRequest(r))
	vars := mux.Vars(r)
	ranName := vars["ranName"]
	request := models.GetNodebIdRequest{RanName: ranName}

	c.handleRequest(writer, &r.Header, httpmsghandlerprovider.GetNodebIdRequest, request, false, http.StatusOK)
	}

	func (c NodebController) GetNodeb(writer http.ResponseWriter, r http.Request) {
	c.logger.Infof("[Client -> E2 Manager] #NodebController.GetNodeb - request: %v", c.prettifyRequest(r))
	vars := mux.Vars(r)
	ranName := vars["ranName"]
	request := models.GetNodebRequest{RanName: ranName}
	c.handleRequest(writer, &r.Header, httpmsghandlerprovider.GetNodebRequest, request, false, http.StatusOK)
	}

	func (c NodebController) UpdateGnb(writer http.ResponseWriter, r http.Request) {
	c.logger.Infof("[Client -> E2 Manager] #NodebController.UpdateGnb - request: %v", c.prettifyRequest(r))
	vars := mux.Vars(r)
	ranName := vars[ParamRanName]

	request := models.UpdateGnbRequest{}

	gnb := entities.Gnb{}

	if !c.extractRequestBodyToProto(r, &gnb, writer) {
	return
	}

	request.Gnb = &gnb
	request.RanName = ranName
	c.handleRequest(writer, &r.Header, httpmsghandlerprovider.UpdateGnbRequest, &request, true, http.StatusOK)
	}

	func (c NodebController) UpdateEnb(writer http.ResponseWriter, r http.Request) {
	c.logger.Infof("[Client -> E2 Manager] #NodebController.UpdateEnb - request: %v", c.prettifyRequest(r))

	defer r.Body.Close()
	body, err := ioutil.ReadAll(r.Body)

	if err != nil {
	c.logger.Errorf("[Client -> E2 Manager] #NodebController.UpdateEnb - unable to read request body - error: %s", err)
	c.handleErrorResponse(e2managererrors.NewInvalidJsonError(), writer)
	return
	}

	updateEnbRequest := models.UpdateEnbRequest{}
	err = json.Unmarshal(body, &updateEnbRequest)

	if err != nil {
	c.logger.Errorf("[Client -> E2 Manager] #NodebController.UpdateEnb - unable to unmarshal json - error: %s", err)
	c.handleErrorResponse(e2managererrors.NewInvalidJsonError(), writer)
	return
	}

	vars := mux.Vars(r)
	ranName := vars[ParamRanName]

	updateEnbRequest.RanName = ranName

	c.handleRequest(writer, &r.Header, httpmsghandlerprovider.UpdateEnbRequest, &updateEnbRequest, true, http.StatusOK)
	}

	func (c NodebController) AddEnb(writer http.ResponseWriter, r http.Request) {
	c.logger.Infof("[Client -> E2 Manager] #NodebController.AddEnb - request: %v", c.prettifyRequest(r))

	defer r.Body.Close()
	body, err := ioutil.ReadAll(r.Body)

	if err != nil {
	c.logger.Errorf("[Client -> E2 Manager] #NodebController.AddEnb - unable to read request body - error: %s", err)
	c.handleErrorResponse(e2managererrors.NewInvalidJsonError(), writer)
	return
	}

	addEnbRequest := models.AddEnbRequest{}
	err = json.Unmarshal(body, &addEnbRequest)

	if err != nil {
	c.logger.Errorf("[Client -> E2 Manager] #NodebController.AddEnb - unable to unmarshal json - error: %s", err)
	c.handleErrorResponse(e2managererrors.NewInvalidJsonError(), writer)
	return
	}

	c.handleRequest(writer, &r.Header, httpmsghandlerprovider.AddEnbRequest, &addEnbRequest, true, http.StatusCreated)
	}

	func (c NodebController) DeleteEnb(writer http.ResponseWriter, r http.Request) {
	c.logger.Infof("[Client -> E2 Manager] #NodebController.DeleteEnb - request: %v", c.prettifyRequest(r))
	vars := mux.Vars(r)
	ranName := vars["ranName"]
	request := &models.DeleteEnbRequest{RanName: ranName}
	c.handleRequest(writer, &r.Header, httpmsghandlerprovider.DeleteEnbRequest, request, true, http.StatusNoContent)
	}

	func (c NodebController) SetGeneralConfiguration(writer http.ResponseWriter, r http.Request) {
	c.logger.Infof("[Client -> E2 Manager] #NodebController.SetGeneralConfiguration - request: %v", c.prettifyRequest(r))

	request := models.GeneralConfigurationRequest{}

	if !c.extractJsonBodyDisallowUnknownFields(r, &request, writer) {
	return
	}
	c.handleRequest(writer, &r.Header, httpmsghandlerprovider.SetGeneralConfigurationRequest, request, false, http.StatusOK)
	}

	func (c NodebController) Shutdown(writer http.ResponseWriter, r http.Request) {
	c.logger.Infof("[Client -> E2 Manager] #NodebController.Shutdown - request: %v", c.prettifyRequest(r))
	c.handleRequest(writer, &r.Header, httpmsghandlerprovider.ShutdownRequest, nil, false, http.StatusNoContent)
	}

	func (c NodebController) X2Reset(writer http.ResponseWriter, r http.Request) {
	c.logger.Infof("[Client -> E2 Manager] #NodebController.X2Reset - request: %v", c.prettifyRequest(r))
	request := models.ResetRequest{}
	vars := mux.Vars(r)
	ranName := vars[ParamRanName]

	if err := c.extractJsonBody(r, &request); err != nil {
	c.handleErrorResponse(err, writer)
	return
	}
	request.RanName = ranName
	c.handleRequest(writer, &r.Header, httpmsghandlerprovider.ResetRequest, request, false, http.StatusNoContent)
	}

	func (c NodebController) HealthCheckRequest(writer http.ResponseWriter, r http.Request) {
	c.logger.Infof("[Client -> E2 Manager] #NodebController.HealthCheckRequest - request: %v", c.prettifyRequest(r))

	request := models.HealthCheckRequest{}

	if err := c.extractJsonBody(r, &request); err != nil {
	c.handleErrorResponse(err, writer)
	return
	}

	c.handleRequest(writer, &r.Header, httpmsghandlerprovider.HealthCheckRequest, request, true, http.StatusAccepted)
	}

	func (c NodebController) extractRequestBodyToProto(r http.Request, pb proto.Message, writer http.ResponseWriter) bool {
	defer r.Body.Close()

	err := jsonpb.Unmarshal(r.Body, pb)

	if err != nil {
	c.logger.Errorf("[Client -> E2 Manager] #NodebController.extractJsonBody - unable to extract json body - error: %s", err)
	c.handleErrorResponse(e2managererrors.NewInvalidJsonError(), writer)
	return false
	}

	return true
	}

	func (c NodebController) extractJsonBodyDisallowUnknownFields(r http.Request, request models.Request, writer http.ResponseWriter) bool {
	defer r.Body.Close()

	decoder := json.NewDecoder(r.Body)
	decoder.DisallowUnknownFields()

	if err := decoder.Decode(&request); err != nil {
	c.logger.Errorf("[Client -> E2 Manager] #NodebController.extractJsonBody - unable to extract json body - error: %s", err)
	c.handleErrorResponse(e2managererrors.NewInvalidJsonError(), writer)
	return false
	}

	return true
	}

	func (c NodebController) extractJsonBody(r http.Request, request models.Request) error {
	defer r.Body.Close()
	body, err := ioutil.ReadAll(io.LimitReader(r.Body, LimitRequest))

	if err != nil {
	c.logger.Errorf("[Client -> E2 Manager] #NodebController.extractJsonBody - unable to extract json body - error: %s", err)
	return e2managererrors.NewInvalidJsonError()
	}

	err = json.Unmarshal(body, &request)
	if err != nil {
	c.logger.Errorf("[Client -> E2 Manager] #NodebController.extractJsonBody - unable to extract json body - error: %s", err)
	return e2managererrors.NewInvalidJsonError()
	}

	return nil
	}

	func (c NodebController) handleRequest(writer http.ResponseWriter, header http.Header, requestName httpmsghandlerprovider.IncomingRequest, request models.Request, validateRequestHeaders bool, successStatusCode int) {

	if validateRequestHeaders {

	err := c.validateRequestHeader(header)
	if err != nil {
	c.handleErrorResponse(err, writer)
	return
	}
	}

	handler, err := c.handlerProvider.GetHandler(requestName)

	if err != nil {
	c.handleErrorResponse(err, writer)
	return
	}

	response, err := handler.Handle(request)

	if err != nil {
	c.handleErrorResponse(err, writer)
	return
	}

	if successStatusCode == http.StatusNoContent {
	writer.WriteHeader(successStatusCode)
	c.logger.Infof("[E2 Manager -> Client] #NodebController.handleRequest - status response: %v", http.StatusNoContent)
	return
	}

	result, err := response.Marshal()

	if err != nil {
	c.handleErrorResponse(err, writer)
	return
	}

	c.logger.Infof("[E2 Manager -> Client] #NodebController.handleRequest - response: %s", result)
	writer.Header().Set(ContentType, ApplicationJson)
	writer.WriteHeader(successStatusCode)
	writer.Write(result)
	}

	func (c NodebController) validateRequestHeader(header http.Header) error {

	if header.Get(ContentType) != ApplicationJson {
	c.logger.Errorf("#NodebController.validateRequestHeader - validation failure, incorrect content type")

	return e2managererrors.NewHeaderValidationError()
	}
	return nil
	}

	func (c *NodebController) handleErrorResponse(err error, writer http.ResponseWriter) {

	var errorResponseDetails models.ErrorResponse
	var httpError int

	if err != nil {
	switch err.(type) {
	case *e2managererrors.RnibDbError:
	e2Error, _ := err.(*e2managererrors.RnibDbError)
	errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
	httpError = http.StatusInternalServerError
	case *e2managererrors.CommandAlreadyInProgressError:
	e2Error, _ := err.(*e2managererrors.CommandAlreadyInProgressError)
	errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
	httpError = http.StatusMethodNotAllowed
	case *e2managererrors.HeaderValidationError:
	e2Error, _ := err.(*e2managererrors.HeaderValidationError)
	errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
	httpError = http.StatusUnsupportedMediaType
	case *e2managererrors.WrongStateError:
	e2Error, _ := err.(*e2managererrors.WrongStateError)
	errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
	httpError = http.StatusBadRequest
	case *e2managererrors.RequestValidationError:
	e2Error, _ := err.(*e2managererrors.RequestValidationError)
	errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
	httpError = http.StatusBadRequest
	case *e2managererrors.InvalidJsonError:
	e2Error, _ := err.(*e2managererrors.InvalidJsonError)
	errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
	httpError = http.StatusBadRequest
	case *e2managererrors.RmrError:
	e2Error, _ := err.(*e2managererrors.RmrError)
	errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
	httpError = http.StatusInternalServerError
	case *e2managererrors.ResourceNotFoundError:
	e2Error, _ := err.(*e2managererrors.ResourceNotFoundError)
	errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
	httpError = http.StatusNotFound
	case *e2managererrors.E2TInstanceAbsenceError:
	e2Error, _ := err.(*e2managererrors.E2TInstanceAbsenceError)
	errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
	httpError = http.StatusServiceUnavailable
	case *e2managererrors.RoutingManagerError:
	e2Error, _ := err.(*e2managererrors.RoutingManagerError)
	errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
	httpError = http.StatusServiceUnavailable
	case *e2managererrors.NodebExistsError:
	e2Error, _ := err.(*e2managererrors.NodebExistsError)
	errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
	httpError = http.StatusBadRequest
	case *e2managererrors.NoConnectedRanError:
	e2Error, _ := err.(*e2managererrors.NoConnectedRanError)
	errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
	httpError = http.StatusNotFound
	default:
	e2Error := e2managererrors.NewInternalError()
	errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
	httpError = http.StatusInternalServerError
	}
	}
	errorResponse, _ := json.Marshal(errorResponseDetails)

	c.logger.Errorf("[E2 Manager -> Client] #NodebController.handleErrorResponse - http status: %d, error response: %+v", httpError, errorResponseDetails)

	writer.Header().Set(ContentType, ApplicationJson)
	writer.WriteHeader(httpError)
	_, err = writer.Write(errorResponse)
	}

	func (c NodebController) prettifyRequest(request http.Request) string {
	dump, _ := httputil.DumpRequest(request, true)
	requestPrettyPrint := strings.Replace(string(dump), "\r\n", " ", -1)
	return strings.Replace(requestPrettyPrint, "\n", "", -1)
	}