-import type { IncomingMessage } from 'http';
+import type { IncomingMessage } from 'node:http';
+import type { Duplex } from 'node:stream';
-import WebSocket from 'ws';
+import { StatusCodes } from 'http-status-codes';
+import { type RawData, WebSocket, WebSocketServer } from 'ws';
-import type { ServerOptions } from '../../types/ConfigurationData';
-import Configuration from '../../utils/Configuration';
-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';
+import { UIServerUtils } from './UIServerUtils';
+import {
+ type ProtocolRequest,
+ type ProtocolResponse,
+ type UIServerConfiguration,
+ WebSocketCloseEventStatusCode,
+} from '../../types';
+import {
+ Constants,
+ getWebSocketCloseEventStatusString,
+ isNotEmptyString,
+ isNullOrUndefined,
+ logPrefix,
+ logger,
+ validateUUID,
+} from '../../utils';
const moduleName = 'UIWebSocketServer';
-export default class UIWebSocketServer extends AbstractUIServer {
- public constructor(options?: ServerOptions) {
- super();
- this.server = new WebSocket.Server(options ?? Configuration.getUIServer().options);
+export class UIWebSocketServer extends AbstractUIServer {
+ private readonly webSocketServer: WebSocketServer;
+
+ public constructor(protected readonly uiServerConfiguration: UIServerConfiguration) {
+ super(uiServerConfiguration);
+ this.webSocketServer = new WebSocketServer({
+ handleProtocols: UIServerUtils.handleProtocols,
+ noServer: true,
+ });
}
public start(): void {
- this.server.on('connection', (socket: WebSocket, request: IncomingMessage): void => {
- const [protocol, version] = UIServiceUtils.getProtocolAndVersion(socket.protocol);
- if (UIServiceUtils.isProtocolAndVersionSupported(protocol, version) === false) {
+ // eslint-disable-next-line @typescript-eslint/no-unused-vars
+ this.webSocketServer.on('connection', (ws: WebSocket, req: IncomingMessage): void => {
+ if (UIServerUtils.isProtocolAndVersionSupported(ws.protocol) === false) {
logger.error(
`${this.logPrefix(
moduleName,
- 'start.server.onconnection'
- )} Unsupported UI protocol version: '${protocol}${version}'`
+ 'start.server.onconnection',
+ )} Unsupported UI protocol version: '${ws.protocol}'`,
);
- socket.close();
+ ws.close(WebSocketCloseEventStatusCode.CLOSE_PROTOCOL_ERROR);
}
- if (!this.uiServices.has(version)) {
- this.uiServices.set(version, UIServiceFactory.getUIServiceImplementation(version, this));
- }
- // FIXME: check connection validity
- socket.on('message', (rawData) => {
+ const [, version] = UIServerUtils.getProtocolAndVersion(ws.protocol);
+ this.registerProtocolVersionUIService(version);
+ ws.on('message', (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(rawData)
- .catch(() => {
- /* Error caught by AbstractUIService */
- });
+ ?.requestHandler(request)
+ .then((protocolResponse?: ProtocolResponse) => {
+ if (!isNullOrUndefined(protocolResponse)) {
+ this.sendResponse(protocolResponse!);
+ }
+ })
+ .catch(Constants.EMPTY_FUNCTION);
});
- socket.on('error', (error) => {
- logger.error(
- `${this.logPrefix(moduleName, 'start.socket.onerror')} Error on WebSocket:`,
- error
+ ws.on('error', (error) => {
+ logger.error(`${this.logPrefix(moduleName, 'start.ws.onerror')} WebSocket error:`, error);
+ });
+ ws.on('close', (code, reason) => {
+ logger.debug(
+ `${this.logPrefix(
+ moduleName,
+ 'start.ws.onclose',
+ )} WebSocket closed: '${getWebSocketCloseEventStatusString(
+ code,
+ )}' - '${reason.toString()}'`,
);
});
});
+ // eslint-disable-next-line @typescript-eslint/no-unused-vars
+ this.httpServer.on('connect', (req: IncomingMessage, socket: Duplex, head: Buffer) => {
+ if (req.headers?.connection !== 'Upgrade' || req.headers?.upgrade !== 'websocket') {
+ socket.write(`HTTP/1.1 ${StatusCodes.BAD_REQUEST} Bad Request\r\n\r\n`);
+ socket.destroy();
+ }
+ });
+ this.httpServer.on('upgrade', (req: IncomingMessage, socket: Duplex, head: Buffer): void => {
+ this.authenticate(req, (err) => {
+ if (err) {
+ socket.write(`HTTP/1.1 ${StatusCodes.UNAUTHORIZED} Unauthorized\r\n\r\n`);
+ socket.destroy();
+ return;
+ }
+ try {
+ this.webSocketServer.handleUpgrade(req, socket, head, (ws: WebSocket) => {
+ this.webSocketServer.emit('connection', ws, req);
+ });
+ } catch (error) {
+ logger.error(
+ `${this.logPrefix(
+ moduleName,
+ 'start.httpServer.on.upgrade',
+ )} Error at handling connection upgrade:`,
+ error,
+ );
+ }
+ });
+ });
+ this.startHttpServer();
}
- public stop(): void {
- this.chargingStations.clear();
- }
-
- public sendRequest(request: string): void {
- this.broadcastToClients(request);
+ public sendRequest(request: ProtocolRequest): void {
+ this.broadcastToClients(JSON.stringify(request));
}
- public sendResponse(response: string): void {
- // TODO: send response only to the client that sent the request
- this.broadcastToClients(response);
+ public sendResponse(response: ProtocolResponse): void {
+ const responseId = response[0];
+ try {
+ if (this.hasResponseHandler(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): string {
+ public logPrefix = (modName?: string, methodName?: string, prefixSuffix?: string): string => {
+ const logMsgPrefix = prefixSuffix
+ ? `UI WebSocket Server ${prefixSuffix}`
+ : 'UI WebSocket Server';
const logMsg =
- modName && methodName
- ? ` UI WebSocket Server | ${modName}.${methodName}:`
- : ' UI WebSocket Server |';
- return Utils.logPrefix(logMsg);
- }
+ isNotEmptyString(modName) && isNotEmptyString(methodName)
+ ? ` ${logMsgPrefix} | ${modName}.${methodName}:`
+ : ` ${logMsgPrefix} |`;
+ return logPrefix(logMsg);
+ };
private broadcastToClients(message: string): void {
- for (const client of (this.server as WebSocket.Server).clients) {
+ for (const client of this.webSocketServer.clients) {
if (client?.readyState === WebSocket.OPEN) {
client.send(message);
}
}
}
+
+ private validateRawDataRequest(rawData: RawData): ProtocolRequest | false {
+ // logger.debug(
+ // `${this.logPrefix(
+ // moduleName,
+ // 'validateRawDataRequest',
+ // // eslint-disable-next-line @typescript-eslint/no-base-to-string
+ // )} Raw data received in string format: ${rawData.toString()}`,
+ // );
+
+ // eslint-disable-next-line @typescript-eslint/no-base-to-string
+ const request = JSON.parse(rawData.toString()) as ProtocolRequest;
+
+ if (Array.isArray(request) === false) {
+ logger.error(
+ `${this.logPrefix(
+ moduleName,
+ 'validateRawDataRequest',
+ )} UI protocol request is not an array:`,
+ request,
+ );
+ return false;
+ }
+
+ if (request.length !== 3) {
+ logger.error(
+ `${this.logPrefix(moduleName, 'validateRawDataRequest')} UI protocol request is malformed:`,
+ request,
+ );
+ return false;
+ }
+
+ if (validateUUID(request[0]) === false) {
+ logger.error(
+ `${this.logPrefix(
+ moduleName,
+ 'validateRawDataRequest',
+ )} UI protocol request UUID field is invalid:`,
+ request,
+ );
+ return false;
+ }
+
+ return request;
+ }
}
repositories / e-mobility-charging-stations-simulator.git / blobdiff