axis-discovery-ssdp/src/sockets/NotifySocket.js

A Node.js SSDP (UPnP) client library written in TypeScript capable of searching for Axis Communication cameras.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.NotifySocket = void 0;
const logging_1 = require("../logging");
const Constants_1 = require("./Constants");
const Message_1 = require("./Message");
const SocketBase_1 = require("./SocketBase");
/**
 * Class representing a SSDP socket that support the HTTP method NOTIFY.
 */
class NotifySocket extends SocketBase_1.SocketBase {
    /**
     * Initializes a new instance of the class.
     * @param addresses The network addresses to listen for NOTIFY
     * advertisements on.
     */
    constructor(addresses) {
        super();
        this.addresses = addresses;
    }
    onListening() {
        if (!this.socket) {
            throw new Error('Notify socket has never been started');
        }
        (0, logging_1.log)('NotifySocket#onListening - %s:%d', this.socket.address().address, this.socket.address().port);
        for (const address of this.addresses) {
            (0, logging_1.log)('NotifySocket#onListening - add membership to %s', address);
            try {
                this.socket.addMembership(Constants_1.SSDP_MULTICAST_ADDRESS, address);
            }
            catch (error) {
                (0, logging_1.log)('NotifySocket#onListening - %o', error);
            }
        }
    }
    onMessage(messageBuffer, remote) {
        const message = new Message_1.Message(remote.address, messageBuffer);
        if (message.method !== 'NOTIFY * HTTP/1.1' || message.nt !== 'urn:axis-com:service:BasicService:1') {
            return;
        }
        if (message.nts === 'ssdp:alive') {
            this.emit('hello', message);
        }
        else if (message.nts === 'ssdp:byebye') {
            this.emit('goodbye', message);
        }
    }
    bind() {
        return new Promise((resolve) => {
            if (!this.socket) {
                throw new Error('Notify socket has never been started');
            }
            this.socket.bind(Constants_1.SSDP_PORT, undefined, () => resolve());
        });
    }
}
exports.NotifySocket = NotifySocket;
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