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120 lines
4.2 KiB
120 lines
4.2 KiB
2 years ago
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"use strict";
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var __importDefault = (this && this.__importDefault) || function (mod) {
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return (mod && mod.__esModule) ? mod : { "default": mod };
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.Server = void 0;
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const array_flatten_1 = __importDefault(require("array-flatten"));
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const es6_1 = __importDefault(require("fast-deep-equal/es6"));
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const multicast_dns_1 = __importDefault(require("multicast-dns"));
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const dns_equal_1 = __importDefault(require("dns-equal"));
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class Server {
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constructor(opts, errorCallback) {
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this.registry = {};
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this.mdns = (0, multicast_dns_1.default)(opts);
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this.mdns.setMaxListeners(0);
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this.mdns.on('query', this.respondToQuery.bind(this));
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this.errorCallback = errorCallback !== null && errorCallback !== void 0 ? errorCallback : function (err) { throw err; };
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}
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register(records) {
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const shouldRegister = (record) => {
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var subRegistry = this.registry[record.type];
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if (!subRegistry) {
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subRegistry = this.registry[record.type] = [];
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}
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else if (subRegistry.some(this.isDuplicateRecord(record))) {
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return;
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}
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subRegistry.push(record);
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};
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if (Array.isArray(records)) {
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records.forEach(shouldRegister);
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}
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else {
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shouldRegister(records);
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}
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}
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unregister(records) {
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const shouldUnregister = (record) => {
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let type = record.type;
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if (!(type in this.registry)) {
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return;
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}
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this.registry[type] = this.registry[type].filter((i) => i.name !== record.name);
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};
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if (Array.isArray(records)) {
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records.forEach(shouldUnregister);
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}
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else {
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shouldUnregister(records);
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}
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}
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respondToQuery(query) {
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let self = this;
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query.questions.forEach((question) => {
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var type = question.type;
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var name = question.name;
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var answers = type === 'ANY'
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? array_flatten_1.default.depth(Object.keys(self.registry).map(self.recordsFor.bind(self, name)), 1)
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: self.recordsFor(name, type);
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if (answers.length === 0)
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return;
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var additionals = [];
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if (type !== 'ANY') {
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answers.forEach((answer) => {
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if (answer.type !== 'PTR')
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return;
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additionals = additionals
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.concat(self.recordsFor(answer.data, 'SRV'))
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.concat(self.recordsFor(answer.data, 'TXT'));
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});
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additionals
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.filter(function (record) {
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return record.type === 'SRV';
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})
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.map(function (record) {
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return record.data.target;
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})
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.filter(this.unique())
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.forEach(function (target) {
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additionals = additionals
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.concat(self.recordsFor(target, 'A'))
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.concat(self.recordsFor(target, 'AAAA'));
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});
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}
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self.mdns.respond({ answers: answers, additionals: additionals }, (err) => {
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if (err) {
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this.errorCallback(err);
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}
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});
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});
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}
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recordsFor(name, type) {
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if (!(type in this.registry)) {
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return [];
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}
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return this.registry[type].filter((record) => {
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var _name = ~name.indexOf('.') ? record.name : record.name.split('.')[0];
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return (0, dns_equal_1.default)(_name, name);
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});
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}
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isDuplicateRecord(a) {
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return (b) => {
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return a.type === b.type &&
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a.name === b.name &&
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(0, es6_1.default)(a.data, b.data);
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};
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}
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unique() {
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var set = [];
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return (obj) => {
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if (~set.indexOf(obj))
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return false;
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set.push(obj);
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return true;
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};
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}
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}
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exports.Server = Server;
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exports.default = Server;
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//# sourceMappingURL=mdns-server.js.map
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