IOTConnect-Web/node_modules/mqtt/build/lib/BufferedDuplex.js

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2024-05-09 01:49:52 +00:00
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.BufferedDuplex = exports.writev = void 0;
const readable_stream_1 = require("readable-stream");
function writev(chunks, cb) {
const buffers = new Array(chunks.length);
for (let i = 0; i < chunks.length; i++) {
if (typeof chunks[i].chunk === 'string') {
buffers[i] = Buffer.from(chunks[i].chunk, 'utf8');
}
else {
buffers[i] = chunks[i].chunk;
}
}
this._write(Buffer.concat(buffers), 'binary', cb);
}
exports.writev = writev;
class BufferedDuplex extends readable_stream_1.Duplex {
constructor(opts, proxy, socket) {
super({
objectMode: true,
});
this.proxy = proxy;
this.socket = socket;
this.writeQueue = [];
if (!opts.objectMode) {
this._writev = writev.bind(this);
}
this.isSocketOpen = false;
this.proxy.on('data', (chunk) => {
this.push(chunk);
});
}
_read(size) {
this.proxy.read(size);
}
_write(chunk, encoding, cb) {
if (!this.isSocketOpen) {
this.writeQueue.push({ chunk, encoding, cb });
}
else {
this.writeToProxy(chunk, encoding, cb);
}
}
_final(callback) {
this.writeQueue = [];
this.proxy.end(callback);
}
socketReady() {
this.emit('connect');
this.isSocketOpen = true;
this.processWriteQueue();
}
writeToProxy(chunk, encoding, cb) {
if (this.proxy.write(chunk, encoding) === false) {
this.proxy.once('drain', cb);
}
else {
cb();
}
}
processWriteQueue() {
while (this.writeQueue.length > 0) {
const { chunk, encoding, cb } = this.writeQueue.shift();
this.writeToProxy(chunk, encoding, cb);
}
}
}
exports.BufferedDuplex = BufferedDuplex;
//# sourceMappingURL=BufferedDuplex.js.map