iot-backend/software/flow/node_modules/engine.io-parser/build/esm/index.js

33 lines
1.2 KiB
JavaScript

import encodePacket from "./encodePacket.js";
import decodePacket from "./decodePacket.js";
const SEPARATOR = String.fromCharCode(30); // see https://en.wikipedia.org/wiki/Delimiter#ASCII_delimited_text
const encodePayload = (packets, callback) => {
// some packets may be added to the array while encoding, so the initial length must be saved
const length = packets.length;
const encodedPackets = new Array(length);
let count = 0;
packets.forEach((packet, i) => {
// force base64 encoding for binary packets
encodePacket(packet, false, encodedPacket => {
encodedPackets[i] = encodedPacket;
if (++count === length) {
callback(encodedPackets.join(SEPARATOR));
}
});
});
};
const decodePayload = (encodedPayload, binaryType) => {
const encodedPackets = encodedPayload.split(SEPARATOR);
const packets = [];
for (let i = 0; i < encodedPackets.length; i++) {
const decodedPacket = decodePacket(encodedPackets[i], binaryType);
packets.push(decodedPacket);
if (decodedPacket.type === "error") {
break;
}
}
return packets;
};
export const protocol = 4;
export { encodePacket, encodePayload, decodePacket, decodePayload };