@tdengine/websocket
Version:
The websocket Node.js connector for TDengine. TDengine versions 3.3.2.0 and above are recommended to use this connector.
60 lines (59 loc) • 1.78 kB
JavaScript
;
var _a;
Object.defineProperty(exports, "__esModule", { value: true });
exports.ReqId = void 0;
const crypto_1 = require("crypto");
const uuid_1 = require("uuid");
const node_process_1 = require("node:process");
function hexStringToNumber(hexString) {
const number = parseInt(hexString, 16);
if (isNaN(number)) {
throw new Error(`number ${hexString} parse int fail!`);
}
return number;
}
function uuidToHash() {
let uuid = (0, uuid_1.v4)();
// create SHA-256 hash
const hash = (0, crypto_1.createHash)('sha256');
// update hash contact
hash.update(uuid);
// get hex hash code
const strHex = hash.digest('hex').substring(0, 8);
let hex = hexStringToNumber(strHex);
return hex & 0xff;
}
class ReqId {
static getReqID(req_id) {
if (req_id) {
return req_id;
}
let no = Atomics.add(_a.int32View, 0, 1);
const buffer = new ArrayBuffer(8);
const view = new DataView(buffer);
let ts = new Date().getTime() >> 8;
view.setUint8(6, this._uuid >> 4);
view.setUint8(5, (this._uuid & 0x0f) << 4 | this._pid);
view.setUint8(4, ts >> 16 & 0xff);
view.setUint16(2, ts & 0xffff, true);
view.setUint16(0, no & 0xffff, true);
let id = view.getBigInt64(0, true);
return Number(id);
}
}
exports.ReqId = ReqId;
_a = ReqId;
ReqId._uuid = 0;
ReqId._pid = 0;
ReqId.sharedBuffer = new SharedArrayBuffer(4);
ReqId.int32View = new Int32Array(_a.sharedBuffer);
(() => {
_a._uuid = uuidToHash();
if (node_process_1.pid) {
_a._pid = node_process_1.pid & 0xf;
}
else {
_a._pid = (Math.floor(Math.random() * 9000) + 1000) & 0xf;
}
Atomics.store(_a.int32View, 0, 0);
})();