nats
Version:
Node.js client for NATS, a lightweight, high-performance cloud native messaging system
137 lines • 5.62 kB
JavaScript
;
/*
* Copyright 2021-2023 The NATS Authors
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.checkUnsupportedOption = exports.checkOptions = exports.parseOptions = exports.buildAuthenticator = exports.defaultOptions = exports.DEFAULT_RECONNECT_TIME_WAIT = exports.DEFAULT_MAX_PING_OUT = exports.DEFAULT_PING_INTERVAL = exports.DEFAULT_JITTER_TLS = exports.DEFAULT_JITTER = exports.DEFAULT_MAX_RECONNECT_ATTEMPTS = void 0;
const util_1 = require("./util");
const transport_1 = require("./transport");
const core_1 = require("./core");
const authenticator_1 = require("./authenticator");
const core_2 = require("./core");
exports.DEFAULT_MAX_RECONNECT_ATTEMPTS = 10;
exports.DEFAULT_JITTER = 100;
exports.DEFAULT_JITTER_TLS = 1000;
// Ping interval
exports.DEFAULT_PING_INTERVAL = 2 * 60 * 1000; // 2 minutes
exports.DEFAULT_MAX_PING_OUT = 2;
// DISCONNECT Parameters, 2 sec wait, 10 tries
exports.DEFAULT_RECONNECT_TIME_WAIT = 2 * 1000;
function defaultOptions() {
return {
maxPingOut: exports.DEFAULT_MAX_PING_OUT,
maxReconnectAttempts: exports.DEFAULT_MAX_RECONNECT_ATTEMPTS,
noRandomize: false,
pedantic: false,
pingInterval: exports.DEFAULT_PING_INTERVAL,
reconnect: true,
reconnectJitter: exports.DEFAULT_JITTER,
reconnectJitterTLS: exports.DEFAULT_JITTER_TLS,
reconnectTimeWait: exports.DEFAULT_RECONNECT_TIME_WAIT,
tls: undefined,
verbose: false,
waitOnFirstConnect: false,
ignoreAuthErrorAbort: false,
};
}
exports.defaultOptions = defaultOptions;
function buildAuthenticator(opts) {
const buf = [];
// jwtAuthenticator is created by the user, since it
// will require possibly reading files which
// some of the clients are simply unable to do
if (typeof opts.authenticator === "function") {
buf.push(opts.authenticator);
}
if (Array.isArray(opts.authenticator)) {
buf.push(...opts.authenticator);
}
if (opts.token) {
buf.push((0, authenticator_1.tokenAuthenticator)(opts.token));
}
if (opts.user) {
buf.push((0, authenticator_1.usernamePasswordAuthenticator)(opts.user, opts.pass));
}
return buf.length === 0 ? (0, authenticator_1.noAuthFn)() : (0, authenticator_1.multiAuthenticator)(buf);
}
exports.buildAuthenticator = buildAuthenticator;
function parseOptions(opts) {
const dhp = `${core_2.DEFAULT_HOST}:${(0, transport_1.defaultPort)()}`;
opts = opts || { servers: [dhp] };
opts.servers = opts.servers || [];
if (typeof opts.servers === "string") {
opts.servers = [opts.servers];
}
if (opts.servers.length > 0 && opts.port) {
throw new core_2.NatsError("port and servers options are mutually exclusive", core_2.ErrorCode.InvalidOption);
}
if (opts.servers.length === 0 && opts.port) {
opts.servers = [`${core_2.DEFAULT_HOST}:${opts.port}`];
}
if (opts.servers && opts.servers.length === 0) {
opts.servers = [dhp];
}
const options = (0, util_1.extend)(defaultOptions(), opts);
options.authenticator = buildAuthenticator(options);
["reconnectDelayHandler", "authenticator"].forEach((n) => {
if (options[n] && typeof options[n] !== "function") {
throw new core_2.NatsError(`${n} option should be a function`, core_2.ErrorCode.NotFunction);
}
});
if (!options.reconnectDelayHandler) {
options.reconnectDelayHandler = () => {
let extra = options.tls
? options.reconnectJitterTLS
: options.reconnectJitter;
if (extra) {
extra++;
extra = Math.floor(Math.random() * extra);
}
return options.reconnectTimeWait + extra;
};
}
if (options.inboxPrefix) {
try {
(0, core_1.createInbox)(options.inboxPrefix);
}
catch (err) {
throw new core_2.NatsError(err.message, core_2.ErrorCode.ApiError);
}
}
if (options.resolve) {
if (typeof (0, transport_1.getResolveFn)() !== "function") {
throw new core_2.NatsError(`'resolve' is not supported on this client`, core_2.ErrorCode.InvalidOption);
}
}
return options;
}
exports.parseOptions = parseOptions;
function checkOptions(info, options) {
const { proto, tls_required: tlsRequired, tls_available: tlsAvailable } = info;
if ((proto === undefined || proto < 1) && options.noEcho) {
throw new core_2.NatsError("noEcho", core_2.ErrorCode.ServerOptionNotAvailable);
}
const tls = tlsRequired || tlsAvailable || false;
if (options.tls && !tls) {
throw new core_2.NatsError("tls", core_2.ErrorCode.ServerOptionNotAvailable);
}
}
exports.checkOptions = checkOptions;
function checkUnsupportedOption(prop, v) {
if (v) {
throw new core_2.NatsError(prop, core_2.ErrorCode.InvalidOption);
}
}
exports.checkUnsupportedOption = checkUnsupportedOption;
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