[RIC-475] [RIC-507] Inject RanStatusChangeManager | Enhance E2 Setup flow | Remove...
[ric-plt/e2mgr.git] / E2Manager / controllers / nodeb_controller.go
1 //
2 // Copyright 2019 AT&T Intellectual Property
3 // Copyright 2019 Nokia
4 //
5 // Licensed under the Apache License, Version 2.0 (the "License");
6 // you may not use this file except in compliance with the License.
7 // You may obtain a copy of the License at
8 //
9 //      http://www.apache.org/licenses/LICENSE-2.0
10 //
11 // Unless required by applicable law or agreed to in writing, software
12 // distributed under the License is distributed on an "AS IS" BASIS,
13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 // See the License for the specific language governing permissions and
15 // limitations under the License.
16
17 //  This source code is part of the near-RT RIC (RAN Intelligent Controller)
18 //  platform project (RICP).
19
20 package controllers
21
22 import (
23         "e2mgr/e2managererrors"
24         "e2mgr/logger"
25         "e2mgr/models"
26         "e2mgr/providers/httpmsghandlerprovider"
27         "encoding/json"
28         "gerrit.o-ran-sc.org/r/ric-plt/nodeb-rnib.git/entities"
29         "github.com/golang/protobuf/jsonpb"
30         "github.com/golang/protobuf/proto"
31         "github.com/gorilla/mux"
32         "io"
33         "io/ioutil"
34         "net/http"
35         "net/http/httputil"
36         "strings"
37 )
38
39 const (
40         ParamRanName = "ranName"
41         LimitRequest = 2000
42 )
43 const ApplicationJson = "application/json"
44 const ContentType = "Content-Type"
45
46 type INodebController interface {
47         Shutdown(writer http.ResponseWriter, r *http.Request)
48         X2Reset(writer http.ResponseWriter, r *http.Request)
49         GetNodeb(writer http.ResponseWriter, r *http.Request)
50         UpdateGnb(writer http.ResponseWriter, r *http.Request)
51         GetNodebIdList(writer http.ResponseWriter, r *http.Request)
52         SetGeneralConfiguration(writer http.ResponseWriter, r *http.Request)
53 }
54
55 type NodebController struct {
56         logger          *logger.Logger
57         handlerProvider *httpmsghandlerprovider.IncomingRequestHandlerProvider
58 }
59
60 func NewNodebController(logger *logger.Logger, handlerProvider *httpmsghandlerprovider.IncomingRequestHandlerProvider) *NodebController {
61         return &NodebController{
62                 logger:          logger,
63                 handlerProvider: handlerProvider,
64         }
65 }
66
67 func (c *NodebController) GetNodebIdList(writer http.ResponseWriter, r *http.Request) {
68         c.logger.Infof("[Client -> E2 Manager] #NodebController.GetNodebIdList - request: %v", c.prettifyRequest(r))
69
70         c.handleRequest(writer, &r.Header, httpmsghandlerprovider.GetNodebIdListRequest, nil, false)
71 }
72
73 func (c *NodebController) GetNodeb(writer http.ResponseWriter, r *http.Request) {
74         c.logger.Infof("[Client -> E2 Manager] #NodebController.GetNodeb - request: %v", c.prettifyRequest(r))
75         vars := mux.Vars(r)
76         ranName := vars["ranName"]
77         request := models.GetNodebRequest{RanName: ranName}
78         c.handleRequest(writer, &r.Header, httpmsghandlerprovider.GetNodebRequest, request, false)
79 }
80
81 func (c *NodebController) UpdateGnb(writer http.ResponseWriter, r *http.Request) {
82         c.logger.Infof("[Client -> E2 Manager] #NodebController.UpdateGnb - request: %v", c.prettifyRequest(r))
83         vars := mux.Vars(r)
84         ranName := vars[ParamRanName]
85
86         request := models.UpdateGnbRequest{}
87
88         gnb := entities.Gnb{}
89
90         if !c.extractRequestBodyToProto(r, &gnb, writer) {
91                 return
92         }
93
94         request.Gnb = &gnb
95         request.RanName = ranName
96         c.handleRequest(writer, &r.Header, httpmsghandlerprovider.UpdateGnbRequest, request, true)
97 }
98
99 func (c *NodebController) SetGeneralConfiguration(writer http.ResponseWriter, r *http.Request) {
100         c.logger.Infof("[Client -> E2 Manager] #NodebController.SetGeneralConfiguration - request: %v", c.prettifyRequest(r))
101
102         request := models.GeneralConfigurationRequest{}
103
104         if !c.extractJsonBody(r, &request, writer){
105                 return
106         }
107         c.handleRequest(writer, &r.Header, httpmsghandlerprovider.SetGeneralConfigurationRequest, request, false)
108 }
109
110 func (c *NodebController) Shutdown(writer http.ResponseWriter, r *http.Request) {
111         c.logger.Infof("[Client -> E2 Manager] #NodebController.Shutdown - request: %v", c.prettifyRequest(r))
112         c.handleRequest(writer, &r.Header, httpmsghandlerprovider.ShutdownRequest, nil, false)
113 }
114
115 func (c *NodebController) X2Reset(writer http.ResponseWriter, r *http.Request) {
116         c.logger.Infof("[Client -> E2 Manager] #NodebController.X2Reset - request: %v", c.prettifyRequest(r))
117         request := models.ResetRequest{}
118         vars := mux.Vars(r)
119         ranName := vars[ParamRanName]
120
121         if r.ContentLength > 0 && !c.extractJsonBody(r, &request, writer) {
122                 return
123         }
124         request.RanName = ranName
125         c.handleRequest(writer, &r.Header, httpmsghandlerprovider.ResetRequest, request, false)
126 }
127
128 func (c *NodebController) extractRequestBodyToProto(r *http.Request, pb proto.Message , writer http.ResponseWriter) bool {
129         defer r.Body.Close()
130
131         err := jsonpb.Unmarshal(r.Body, pb)
132
133         if err != nil {
134                 c.logger.Errorf("[Client -> E2 Manager] #NodebController.extractJsonBody - unable to extract json body - error: %s", err)
135                 c.handleErrorResponse(e2managererrors.NewInvalidJsonError(), writer)
136                 return false
137         }
138
139         return true
140 }
141
142 func (c *NodebController) extractJsonBody(r *http.Request, request models.Request, writer http.ResponseWriter) bool {
143         defer r.Body.Close()
144         body, err := ioutil.ReadAll(io.LimitReader(r.Body, LimitRequest))
145
146         if err != nil {
147                 c.logger.Errorf("[Client -> E2 Manager] #NodebController.extractJsonBody - unable to extract json body - error: %s", err)
148                 c.handleErrorResponse(e2managererrors.NewInvalidJsonError(), writer)
149                 return false
150         }
151
152         err = json.Unmarshal(body, &request)
153         if err != nil {
154                 c.logger.Errorf("[Client -> E2 Manager] #NodebController.extractJsonBody - unable to extract json body - error: %s", err)
155                 c.handleErrorResponse(e2managererrors.NewInvalidJsonError(), writer)
156                 return false
157         }
158
159         return true
160 }
161
162 func (c *NodebController) handleRequest(writer http.ResponseWriter, header *http.Header, requestName httpmsghandlerprovider.IncomingRequest, request models.Request, validateRequestHeaders bool) {
163
164         if validateRequestHeaders {
165
166                 err := c.validateRequestHeader(header)
167                 if err != nil {
168                         c.handleErrorResponse(err, writer)
169                         return
170                 }
171         }
172
173         handler, err := c.handlerProvider.GetHandler(requestName)
174
175         if err != nil {
176                 c.handleErrorResponse(err, writer)
177                 return
178         }
179
180         response, err := handler.Handle(request)
181
182         if err != nil {
183                 c.handleErrorResponse(err, writer)
184                 return
185         }
186
187         if response == nil {
188                 writer.WriteHeader(http.StatusNoContent)
189                 c.logger.Infof("[E2 Manager -> Client] #NodebController.handleRequest - status response: %v", http.StatusNoContent)
190                 return
191         }
192
193         result, err := response.Marshal()
194
195         if err != nil {
196                 c.handleErrorResponse(err, writer)
197                 return
198         }
199
200         c.logger.Infof("[E2 Manager -> Client] #NodebController.handleRequest - response: %s", result)
201         writer.Header().Set(ContentType, ApplicationJson)
202         writer.Write(result)
203 }
204
205 func (c *NodebController) validateRequestHeader(header *http.Header) error {
206
207         if header.Get(ContentType) != ApplicationJson {
208                 c.logger.Errorf("#NodebController.validateRequestHeader - validation failure, incorrect content type")
209
210                 return e2managererrors.NewHeaderValidationError()
211         }
212         return nil
213 }
214
215 func (c *NodebController) handleErrorResponse(err error, writer http.ResponseWriter) {
216
217         var errorResponseDetails models.ErrorResponse
218         var httpError int
219
220         if err != nil {
221                 switch err.(type) {
222                 case *e2managererrors.RnibDbError:
223                         e2Error, _ := err.(*e2managererrors.RnibDbError)
224                         errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
225                         httpError = http.StatusInternalServerError
226                 case *e2managererrors.CommandAlreadyInProgressError:
227                         e2Error, _ := err.(*e2managererrors.CommandAlreadyInProgressError)
228                         errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
229                         httpError = http.StatusMethodNotAllowed
230                 case *e2managererrors.HeaderValidationError:
231                         e2Error, _ := err.(*e2managererrors.HeaderValidationError)
232                         errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
233                         httpError = http.StatusUnsupportedMediaType
234                 case *e2managererrors.WrongStateError:
235                         e2Error, _ := err.(*e2managererrors.WrongStateError)
236                         errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
237                         httpError = http.StatusBadRequest
238                 case *e2managererrors.RequestValidationError:
239                         e2Error, _ := err.(*e2managererrors.RequestValidationError)
240                         errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
241                         httpError = http.StatusBadRequest
242                 case *e2managererrors.InvalidJsonError:
243                         e2Error, _ := err.(*e2managererrors.InvalidJsonError)
244                         errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
245                         httpError = http.StatusBadRequest
246                 case *e2managererrors.RmrError:
247                         e2Error, _ := err.(*e2managererrors.RmrError)
248                         errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
249                         httpError = http.StatusInternalServerError
250                 case *e2managererrors.ResourceNotFoundError:
251                         e2Error, _ := err.(*e2managererrors.ResourceNotFoundError)
252                         errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
253                         httpError = http.StatusNotFound
254                 case *e2managererrors.E2TInstanceAbsenceError:
255                         e2Error, _ := err.(*e2managererrors.E2TInstanceAbsenceError)
256                         errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
257                         httpError = http.StatusServiceUnavailable
258                 case *e2managererrors.RoutingManagerError:
259                         e2Error, _ := err.(*e2managererrors.RoutingManagerError)
260                         errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
261                         httpError = http.StatusServiceUnavailable
262                 default:
263                         e2Error := e2managererrors.NewInternalError()
264                         errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
265                         httpError = http.StatusInternalServerError
266                 }
267         }
268         errorResponse, _ := json.Marshal(errorResponseDetails)
269
270         c.logger.Errorf("[E2 Manager -> Client] #NodebController.handleErrorResponse - http status: %d, error response: %+v", httpError, errorResponseDetails)
271
272         writer.Header().Set(ContentType, ApplicationJson)
273         writer.WriteHeader(httpError)
274         _, err = writer.Write(errorResponse)
275 }
276
277 func (c *NodebController) prettifyRequest(request *http.Request) string {
278         dump, _ := httputil.DumpRequest(request, true)
279         requestPrettyPrint := strings.Replace(string(dump), "\r\n", " ", -1)
280         return strings.Replace(requestPrettyPrint, "\n", "", -1)
281 }