nats
Version:
Node.js client for NATS, a lightweight, high-performance cloud native messaging system
78 lines • 2.92 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.extractProtocolMessage = exports.protoLen = exports.LF = exports.CR = exports.CRLF = exports.CR_LF_LEN = exports.CR_LF = exports.getResolveFn = exports.newTransport = exports.getUrlParseFn = exports.defaultPort = exports.setTransportFactory = void 0;
/*
* Copyright 2020-2021 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.
*/
const encoders_1 = require("./encoders");
const core_1 = require("./core");
const databuffer_1 = require("./databuffer");
let transportConfig;
function setTransportFactory(config) {
transportConfig = config;
}
exports.setTransportFactory = setTransportFactory;
function defaultPort() {
return transportConfig !== undefined &&
transportConfig.defaultPort !== undefined
? transportConfig.defaultPort
: core_1.DEFAULT_PORT;
}
exports.defaultPort = defaultPort;
function getUrlParseFn() {
return transportConfig !== undefined && transportConfig.urlParseFn
? transportConfig.urlParseFn
: undefined;
}
exports.getUrlParseFn = getUrlParseFn;
function newTransport() {
if (!transportConfig || typeof transportConfig.factory !== "function") {
throw new Error("transport fn is not set");
}
return transportConfig.factory();
}
exports.newTransport = newTransport;
function getResolveFn() {
return transportConfig !== undefined && transportConfig.dnsResolveFn
? transportConfig.dnsResolveFn
: undefined;
}
exports.getResolveFn = getResolveFn;
exports.CR_LF = "\r\n";
exports.CR_LF_LEN = exports.CR_LF.length;
exports.CRLF = databuffer_1.DataBuffer.fromAscii(exports.CR_LF);
exports.CR = new Uint8Array(exports.CRLF)[0]; // 13
exports.LF = new Uint8Array(exports.CRLF)[1]; // 10
function protoLen(ba) {
for (let i = 0; i < ba.length; i++) {
const n = i + 1;
if (ba.byteLength > n && ba[i] === exports.CR && ba[n] === exports.LF) {
return n + 1;
}
}
return 0;
}
exports.protoLen = protoLen;
function extractProtocolMessage(a) {
// protocol messages are ascii, so Uint8Array
const len = protoLen(a);
if (len > 0) {
const ba = new Uint8Array(a);
const out = ba.slice(0, len);
return encoders_1.TD.decode(out);
}
return "";
}
exports.extractProtocolMessage = extractProtocolMessage;
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