-import { IncomingMessage, createServer } from 'http';
+import type { IncomingMessage } from 'http';
import type internal from 'stream';
import { StatusCodes } from 'http-status-codes';
-import WebSocket, { RawData, WebSocketServer } from 'ws';
+import * as uuid from 'uuid';
+import WebSocket, { type RawData, WebSocketServer } from 'ws';
-import BaseError from '../../exception/BaseError';
import type { UIServerConfiguration } from '../../types/ConfigurationData';
import type { ProtocolRequest, ProtocolResponse } from '../../types/UIProtocol';
import { WebSocketCloseEventStatusCode } from '../../types/WebSocket';
import logger from '../../utils/Logger';
import Utils from '../../utils/Utils';
import { AbstractUIServer } from './AbstractUIServer';
-import UIServiceFactory from './ui-services/UIServiceFactory';
import { UIServiceUtils } from './ui-services/UIServiceUtils';
const moduleName = 'UIWebSocketServer';
public constructor(protected readonly uiServerConfiguration: UIServerConfiguration) {
super(uiServerConfiguration);
- this.httpServer = createServer();
this.webSocketServer = new WebSocketServer({
handleProtocols: UIServiceUtils.handleProtocols,
noServer: true,
);
ws.close(WebSocketCloseEventStatusCode.CLOSE_PROTOCOL_ERROR);
}
- if (this.uiServices.has(version) === false) {
- this.uiServices.set(version, UIServiceFactory.getUIServiceImplementation(version, this));
- }
+ this.registerProtocolVersionUIService(version);
ws.on('message', (rawData) => {
- const [messageId, procedureName, payload] = this.validateRawDataRequest(rawData);
+ const request = this.validateRawDataRequest(rawData);
+ if (request === false) {
+ ws.close(WebSocketCloseEventStatusCode.CLOSE_INVALID_PAYLOAD);
+ return;
+ }
+ 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 */
});
this.authenticate(req, (err) => {
if (err) {
socket.write(`HTTP/1.1 ${StatusCodes.UNAUTHORIZED} Unauthorized\r\n\r\n`);
- socket.destroy(err);
+ socket.destroy();
return;
}
this.webSocketServer.handleUpgrade(req, socket, head, (ws: WebSocket) => {
}
}
- public stop(): void {
- this.chargingStations.clear();
- }
-
public sendRequest(request: ProtocolRequest): void {
this.broadcastToClients(JSON.stringify(request));
}
public sendResponse(response: ProtocolResponse): void {
- // TODO: send response only to the client that sent the request
- this.broadcastToClients(JSON.stringify(response));
+ const responseId = response[0];
+ try {
+ if (this.responseHandlers.has(responseId)) {
+ const ws = this.responseHandlers.get(responseId) as WebSocket;
+ if (ws?.readyState === WebSocket.OPEN) {
+ ws.send(JSON.stringify(response));
+ } else {
+ logger.error(
+ `${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 '${responseId}':`,
+ error
+ );
+ } finally {
+ this.responseHandlers.delete(responseId);
+ }
}
public logPrefix(modName?: string, methodName?: string, prefixSuffix?: string): string {
}
}
- private authenticate(req: IncomingMessage, next: (err?: Error) => void): void {
- if (this.isBasicAuthEnabled() === true) {
- if (this.isValidBasicAuth(req) === false) {
- next(new Error('Unauthorized'));
- } else {
- next();
- }
- } else {
- next();
- }
- }
-
- private validateRawDataRequest(rawData: RawData): ProtocolRequest {
+ private validateRawDataRequest(rawData: RawData): ProtocolRequest | false {
// logger.debug(
// `${this.logPrefix(
// moduleName,
const request = JSON.parse(rawData.toString()) as ProtocolRequest;
if (Array.isArray(request) === false) {
- throw new BaseError('UI protocol request is not an array');
+ logger.error(
+ `${this.logPrefix(
+ moduleName,
+ 'validateRawDataRequest'
+ )} UI protocol request is not an array:`,
+ request
+ );
+ return false;
}
if (request.length !== 3) {
- throw new BaseError('UI protocol request is malformed');
+ logger.error(
+ `${this.logPrefix(moduleName, 'validateRawDataRequest')} UI protocol request is malformed:`,
+ request
+ );
+ return false;
+ }
+
+ if (uuid.validate(request[0]) === false) {
+ logger.error(
+ `${this.logPrefix(
+ moduleName,
+ 'validateRawDataRequest'
+ )} UI protocol request UUID field is invalid:`,
+ request
+ );
+ return false;
}
return request;