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C:/Program Files (x86)/SiteExtensions/WebSSH/2.0.3/node_modules/engine.io-parser/build/esm/_[ Not.Writable ]

File:C:/Program Files (x86)/SiteExtensions/WebSSH/2.0.3/node_modules/engine.io-parser/build/esm/index.js

import { encodePacket, encodePacketToBinary } from "./encodePacket.js";
import { decodePacket } from "./decodePacket.js";
import { ERROR_PACKET } from "./commons.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 function createPacketEncoderStream() {
    return new TransformStream({
        transform(packet, controller) {
            encodePacketToBinary(packet, encodedPacket => {
                const payloadLength = encodedPacket.length;
                let header;
                // inspired by the WebSocket format: https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API/Writing_WebSocket_servers#decoding_payload_length
                if (payloadLength < 126) {
                    header = new Uint8Array(1);
                    new DataView(header.buffer).setUint8(0, payloadLength);
                }
                else if (payloadLength < 65536) {
                    header = new Uint8Array(3);
                    const view = new DataView(header.buffer);
                    view.setUint8(0, 126);
                    view.setUint16(1, payloadLength);
                }
                else {
                    header = new Uint8Array(9);
                    const view = new DataView(header.buffer);
                    view.setUint8(0, 127);
                    view.setBigUint64(1, BigInt(payloadLength));
                }
                // first bit indicates whether the payload is plain text (0) or binary (1)
                if (packet.data && typeof packet.data !== "string") {
                    header[0] |= 0x80;
                }
                controller.enqueue(header);
                controller.enqueue(encodedPacket);
            });
        }
    });
}
let TEXT_DECODER;
function totalLength(chunks) {
    return chunks.reduce((acc, chunk) => acc + chunk.length, 0);
}
function concatChunks(chunks, size) {
    if (chunks[0].length === size) {
        return chunks.shift();
    }
    const buffer = new Uint8Array(size);
    let j = 0;
    for (let i = 0; i < size; i++) {
        buffer[i] = chunks[0][j++];
        if (j === chunks[0].length) {
            chunks.shift();
            j = 0;
        }
    }
    if (chunks.length && j < chunks[0].length) {
        chunks[0] = chunks[0].slice(j);
    }
    return buffer;
}
export function createPacketDecoderStream(maxPayload, binaryType) {
    if (!TEXT_DECODER) {
        TEXT_DECODER = new TextDecoder();
    }
    const chunks = [];
    let state = 0 /* READ_HEADER */;
    let expectedLength = -1;
    let isBinary = false;
    return new TransformStream({
        transform(chunk, controller) {
            chunks.push(chunk);
            while (true) {
                if (state === 0 /* READ_HEADER */) {
                    if (totalLength(chunks) < 1) {
                        break;
                    }
                    const header = concatChunks(chunks, 1);
                    isBinary = (header[0] & 0x80) === 0x80;
                    expectedLength = header[0] & 0x7f;
                    if (expectedLength < 126) {
                        state = 3 /* READ_PAYLOAD */;
                    }
                    else if (expectedLength === 126) {
                        state = 1 /* READ_EXTENDED_LENGTH_16 */;
                    }
                    else {
                        state = 2 /* READ_EXTENDED_LENGTH_64 */;
                    }
                }
                else if (state === 1 /* READ_EXTENDED_LENGTH_16 */) {
                    if (totalLength(chunks) < 2) {
                        break;
                    }
                    const headerArray = concatChunks(chunks, 2);
                    expectedLength = new DataView(headerArray.buffer, headerArray.byteOffset, headerArray.length).getUint16(0);
                    state = 3 /* READ_PAYLOAD */;
                }
                else if (state === 2 /* READ_EXTENDED_LENGTH_64 */) {
                    if (totalLength(chunks) < 8) {
                        break;
                    }
                    const headerArray = concatChunks(chunks, 8);
                    const view = new DataView(headerArray.buffer, headerArray.byteOffset, headerArray.length);
                    const n = view.getUint32(0);
                    if (n > Math.pow(2, 53 - 32) - 1) {
                        // the maximum safe integer in JavaScript is 2^53 - 1
                        controller.enqueue(ERROR_PACKET);
                        break;
                    }
                    expectedLength = n * Math.pow(2, 32) + view.getUint32(4);
                    state = 3 /* READ_PAYLOAD */;
                }
                else {
                    if (totalLength(chunks) < expectedLength) {
                        break;
                    }
                    const data = concatChunks(chunks, expectedLength);
                    controller.enqueue(decodePacket(isBinary ? data : TEXT_DECODER.decode(data), binaryType));
                    state = 0 /* READ_HEADER */;
                }
                if (expectedLength === 0 || expectedLength > maxPayload) {
                    controller.enqueue(ERROR_PACKET);
                    break;
                }
            }
        }
    });
}
export const protocol = 4;
export { encodePacket, encodePayload, decodePacket, decodePayload };

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