Use node crypto built-in uuid v4 generator

[e-mobility-charging-stations-simulator.git] / src / charging-station / ui-server / UIWebSocketServer.ts

diff --git a/src/charging-station/ui-server/UIWebSocketServer.ts b/src/charging-station/ui-server/UIWebSocketServer.ts
index f789d3963e881762b58457e1fa5eed498633b5a4..60a4e3c186221f9c00556744e68110ec123cfa1b 100644 (file)
--- a/src/charging-station/ui-server/UIWebSocketServer.ts
+++ b/src/charging-station/ui-server/UIWebSocketServer.ts
@@ -1,9 +1,8 @@
-import { IncomingMessage, createServer } from 'http';
+import type { IncomingMessage } from 'http';
 import type internal from 'stream';
 
 import { StatusCodes } from 'http-status-codes';
-import * as uuid from 'uuid';
-import WebSocket, { RawData, WebSocketServer } from 'ws';
+import WebSocket, { type RawData, WebSocketServer } from 'ws';
 
 import type { UIServerConfiguration } from '../../types/ConfigurationData';
 import type { ProtocolRequest, ProtocolResponse } from '../../types/UIProtocol';
@@ -11,7 +10,7 @@ import { WebSocketCloseEventStatusCode } from '../../types/WebSocket';
 import logger from '../../utils/Logger';
 import Utils from '../../utils/Utils';
 import { AbstractUIServer } from './AbstractUIServer';
-import { UIServiceUtils } from './ui-services/UIServiceUtils';
+import { UIServerUtils } from './UIServerUtils';
 
 const moduleName = 'UIWebSocketServer';
 
@@ -20,25 +19,25 @@ export default class UIWebSocketServer extends AbstractUIServer {
 
   public constructor(protected readonly uiServerConfiguration: UIServerConfiguration) {
     super(uiServerConfiguration);
-    this.httpServer = createServer();
     this.webSocketServer = new WebSocketServer({
-      handleProtocols: UIServiceUtils.handleProtocols,
+      handleProtocols: UIServerUtils.handleProtocols,
       noServer: true,
     });
   }
 
   public start(): void {
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
     this.webSocketServer.on('connection', (ws: WebSocket, req: IncomingMessage): void => {
-      const [protocol, version] = UIServiceUtils.getProtocolAndVersion(ws.protocol);
-      if (UIServiceUtils.isProtocolAndVersionSupported(protocol, version) === false) {
+      if (UIServerUtils.isProtocolAndVersionSupported(ws.protocol) === false) {
         logger.error(
           `${this.logPrefix(
             moduleName,
             'start.server.onconnection'
-          )} Unsupported UI protocol version: '${protocol}${version}'`
+          )} Unsupported UI protocol version: '${ws.protocol}'`
         );
         ws.close(WebSocketCloseEventStatusCode.CLOSE_PROTOCOL_ERROR);
       }
+      const [, version] = UIServerUtils.getProtocolAndVersion(ws.protocol);
       this.registerProtocolVersionUIService(version);
       ws.on('message', (rawData) => {
         const request = this.validateRawDataRequest(rawData);
@@ -46,10 +45,11 @@ export default class UIWebSocketServer extends AbstractUIServer {
           ws.close(WebSocketCloseEventStatusCode.CLOSE_INVALID_PAYLOAD);
           return;
         }
-        const [messageId, procedureName, payload] = request as ProtocolRequest;
+        const [requestId] = request as ProtocolRequest;
+        this.responseHandlers.set(requestId, ws);
         this.uiServices
           .get(version)
-          .requestHandler(this.buildProtocolRequest(messageId, procedureName, payload))
+          .requestHandler(request)
           .catch(() => {
             /* Error caught by AbstractUIService */
           });
@@ -83,13 +83,7 @@ export default class UIWebSocketServer extends AbstractUIServer {
         });
       }
     );
-    if (this.httpServer.listening === false) {
-      this.httpServer.listen(this.uiServerConfiguration.options);
-    }
-  }
-
-  public stop(): void {
-    this.chargingStations.clear();
+    this.startHttpServer();
   }
 
   public sendRequest(request: ProtocolRequest): void {
@@ -97,8 +91,41 @@ export default class UIWebSocketServer extends AbstractUIServer {
   }
 
   public sendResponse(response: ProtocolResponse): void {
-    // TODO: send response only to the client that sent the request
-    this.broadcastToClients(JSON.stringify(response));
+    const responseId = response[0];
+    try {
+      if (this.responseHandlers.has(responseId)) {
+        const ws = this.responseHandlers.get(responseId) as WebSocket;
+        if (ws?.readyState === WebSocket.OPEN) {
+          ws.send(JSON.stringify(response));
+        } else {
+          logger.error(
+            `${this.logPrefix(
+              moduleName,
+              'sendResponse'
+            )} Error at sending response id '${responseId}', WebSocket is not open: ${
+              ws?.readyState
+            }`
+          );
+        }
+      } else {
+        logger.error(
+          `${this.logPrefix(
+            moduleName,
+            'sendResponse'
+          )} Response for unknown request id: ${responseId}`
+        );
+      }
+    } catch (error) {
+      logger.error(
+        `${this.logPrefix(
+          moduleName,
+          'sendResponse'
+        )} Error at sending response id '${responseId}':`,
+        error
+      );
+    } finally {
+      this.responseHandlers.delete(responseId);
+    }
   }
 
   public logPrefix(modName?: string, methodName?: string, prefixSuffix?: string): string {
@@ -118,18 +145,6 @@ export default class UIWebSocketServer extends AbstractUIServer {
     }
   }
 
-  private authenticate(req: IncomingMessage, next: (err?: Error) => void): void {
-    if (this.isBasicAuthEnabled() === true) {
-      if (this.isValidBasicAuth(req) === false) {
-        next(new Error('Unauthorized'));
-      } else {
-        next();
-      }
-    } else {
-      next();
-    }
-  }
-
   private validateRawDataRequest(rawData: RawData): ProtocolRequest | false {
     // logger.debug(
     //   `${this.logPrefix(
@@ -159,7 +174,7 @@ export default class UIWebSocketServer extends AbstractUIServer {
       return false;
     }
 
-    if (uuid.validate(request[0]) === false) {
+    if (Utils.validateUUID(request[0]) === false) {
       logger.error(
         `${this.logPrefix(
           moduleName,