How to create a websocket client / connection without setup third party libraries in ue4 c++ context.

ue4-websocket-client.cpp

/**
 * Include the PrivateDependencyModuleNames entry below in your project build target configuration:
 * // Depend on WebSockets library from UE4 (UE4 WebSockets implementation is built upon the libwebsockets library).
 * PrivateDependencyModuleNames.AddRange(new string[] { "WebSockets" });
 */

#include "WebSocketsModule.h"
#include "IWebSocket.h"

{
	const FString ServerURL = TEXT("ws://localhost:3000/live");
	const FString ServerProtocol = TEXT("ws"); // Supported protocols are: 'ws', 'wss', or 'wss+insecure'.

	TSharedRef<IWebSocket> Socket = FWebSocketsModule::Get().CreateWebSocket(ServerURL, ServerProtocol);

	Socket->OnConnected().AddLambda([Socket]() {
		UE_LOG(LogTemp, Log, TEXT("Connected to websocket server."));
		Socket->Send("{\"event\": \"test\", \"data\": \"test message data\"}");
	});

	Socket->OnConnectionError().AddLambda([](const FString& Error) {
		UE_LOG(LogTemp, Log, TEXT("Failed to connect to websocket server with error: \"%s\"."), *Error);
	});

	Socket->OnMessage().AddLambda([](const FString& Message) {
		UE_LOG(LogTemp, Log, TEXT("Received message from websocket server: \"%s\"."), *Message);
	});

	Socket->OnClosed().AddLambda([](int32 StatusCode, const FString& Reason, bool bWasClean) {
		UE_LOG(LogTemp, Log, TEXT("Connection to websocket server has been closed with status code: \"%d\" and reason: \"%s\"."), StatusCode, *Reason);
	});

	Socket->Connect();
}

ue4-websocket-server.js

/**
 * For instance a minimal WebSockets server based on nodejs and the ws package (https://www.npmjs.com/package/ws).
 * Install the package mentioned above first:
 *   npm install --save ws
 */

const WebSocket = require('ws');
const webSocketServer = new WebSocket.Server({ port: 3000 });

webSocketServer.on('connection', (webSocketConnection) => {
  console.log('Received connection from UE4 WebSocket client.');

  webSocketConnection.on('message', (message) => {
    console.log('Received message from UE4 WebSocket client: %s.', message);
  });

  webSocketConnection.send('{"event": "welcome", "data": "welcome message data"}');
});