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