_worker.js

// <!--GAMFC-->version base on commit 43fad05dcdae3b723c53c226f8181fc5bd47223e, time is 2023-06-22 15:20:02 UTC<!--GAMFC-END-->.
// @ts-ignore
import { connect } from 'cloudflare:sockets';

// 建议修改为自己的 UUID
let userID = 'd342d11e-d424-4583-b36e-524ab1f0afa4';

// 生成配置文件的 CF 优选 IP
const bestCFIP = "www.gov.se"

// 用于 CF 网站的代理 IP
const proxyIPs = ["workers.cloudflare.cyou"]; // const proxyIPs = ['cdn-all.xn--b6gac.eu.org', 'cdn.xn--b6gac.eu.org', 'cdn-b100.xn--b6gac.eu.org', 'edgetunnel.anycast.eu.org', 'cdn.anycast.eu.org'];
let proxyIP = proxyIPs[Math.floor(Math.random() * proxyIPs.length)];

let dohURL = 'https://sky.rethinkdns.com/1:-Pf_____9_8A_AMAIgE8kMABVDDmKOHTAKg='; // https://cloudflare-dns.com/dns-query or https://dns.google/dns-query

// v2board api environment variables
let nodeId = ''; // 1

let apiToken = ''; //abcdefghijklmnopqrstuvwxyz123456

let apiHost = ''; // api.v2board.com

if (!isValidUUID(userID)) {
    throw new Error('uuid is not valid');
}

export default {
    /**
     * @param {import("@cloudflare/workers-types").Request} request
     * @param {{UID: string, PROXYIP: string, DNS_RESOLVER_URL: string, NODE_ID: int, API_HOST: string, API_TOKEN: string}} env
     * @param {import("@cloudflare/workers-types").ExecutionContext} ctx
     * @returns {Promise<Response>}
     */
    async fetch(request, env, ctx) {
        try {
            userID = env.UID || userID;
            proxyIP = env.PROXYIP || proxyIP;
            dohURL = env.DNS_RESOLVER_URL || dohURL;
            nodeId = env.NODE_ID || nodeId;
            apiToken = env.API_TOKEN || apiToken;
            apiHost = env.API_HOST || apiHost;
            const upgradeHeader = request.headers.get('Upgrade');
            if (!upgradeHeader || upgradeHeader !== 'websocket') {
                const url = new URL(request.url);
                switch (url.pathname) {
                    case '/cf':
                        return new Response(JSON.stringify(request.cf, null, 4), {
                            status: 200,
                            headers: {
                                "Content-Type": "application/json;charset=utf-8",
                            },
                        });
                    case '/connect': // for test connect to cf socket
                        const [hostname, port] = ['cloudflare.com', '80'];
                        console.log(`Connecting to ${hostname}:${port}...`);

                        try {
                            const socket = await connect({
                                hostname: hostname,
                                port: parseInt(port, 10),
                            });

                            const writer = socket.writable.getWriter();

                            try {
                                await writer.write(new TextEncoder().encode('GET / HTTP/1.1\r\nHost: ' + hostname + '\r\n\r\n'));
                            } catch (writeError) {
                                writer.releaseLock();
                                await socket.close();
                                return new Response(writeError.message, { status: 500 });
                            }

                            writer.releaseLock();

                            const reader = socket.readable.getReader();
                            let value;

                            try {
                                const result = await reader.read();
                                value = result.value;
                            } catch (readError) {
                                await reader.releaseLock();
                                await socket.close();
                                return new Response(readError.message, { status: 500 });
                            }

                            await reader.releaseLock();
                            await socket.close();

                            return new Response(new TextDecoder().decode(value), { status: 200 });
                        } catch (connectError) {
                            return new Response(connectError.message, { status: 500 });
                        }
                    case `/${userID}`: {
                        const vlessConfig = getVLESSConfig(userID, request.headers.get('Host'));
                        return new Response(`${vlessConfig}`, {
                            status: 200,
                            headers: {
                                "Content-Type": "text/plain;charset=utf-8",
                            }
                        });
                    }
                    case `/${userID}/base64`: {
                        const base64Config = getBase64Config(userID, request.headers.get('Host'));
                        return new Response(`${base64Config}`, {
                            status: 200,
                            headers: {
                                "Content-Type": "text/plain;charset=utf-8",
                            }
                        });
                    }
                    case `/${userID}/clash`: {
                        const clashConfig = getClashConfig(userID, request.headers.get('Host'));
                        return new Response(`${clashConfig}`, {
                            status: 200,
                            headers: {
                                "Content-Type": "text/plain;charset=utf-8",
                            }
                        });
                    }
                    case `/${userID}/sb`: {
                        const singConfig = getSingConfig(userID, request.headers.get('Host'));
                        return new Response(`${singConfig}`, {
                            status: 200,
                            headers: {
                                "Content-Type": "application/json;charset=utf-8",
                            }
                        });
                    }
                    default:
                        // return new Response('Not found', { status: 404 });
                        // For any other path, reverse proxy to 'maimai.sega.jp' and return the original response
                        url.hostname = 'maimai.sega.jp';
                        url.protocol = 'https:';
                        request = new Request(url, request);
                        return await fetch(request);
                }
            } else {
                return await vlessOverWSHandler(request);
            }
        } catch (err) {
			/** @type {Error} */ let e = err;
            return new Response(e.toString());
        }
    },
};




/**
 * 
 * @param {import("@cloudflare/workers-types").Request} request
 */
async function vlessOverWSHandler(request) {

    /** @type {import("@cloudflare/workers-types").WebSocket[]} */
    // @ts-ignore
    const webSocketPair = new WebSocketPair();
    const [client, webSocket] = Object.values(webSocketPair);

    webSocket.accept();

    let address = '';
    let portWithRandomLog = '';
    const log = (/** @type {string} */ info, /** @type {string | undefined} */ event) => {
        console.log(`[${address}:${portWithRandomLog}] ${info}`, event || '');
    };
    const earlyDataHeader = request.headers.get('sec-websocket-protocol') || '';

    const readableWebSocketStream = makeReadableWebSocketStream(webSocket, earlyDataHeader, log);

    /** @type {{ value: import("@cloudflare/workers-types").Socket | null}}*/
    let remoteSocketWapper = {
        value: null,
    };
    let udpStreamWrite = null;
    let isDns = false;

    // ws --> remote
    readableWebSocketStream.pipeTo(new WritableStream({
        async write(chunk, controller) {
            if (isDns && udpStreamWrite) {
                return udpStreamWrite(chunk);
            }
            if (remoteSocketWapper.value) {
                const writer = remoteSocketWapper.value.writable.getWriter()
                await writer.write(chunk);
                writer.releaseLock();
                return;
            }

            const {
                hasError,
                message,
                portRemote = 443,
                addressRemote = '',
                rawDataIndex,
                vlessVersion = new Uint8Array([0, 0]),
                isUDP,
            } = await processVlessHeader(chunk, userID);
            address = addressRemote;
            portWithRandomLog = `${portRemote}--${Math.random()} ${isUDP ? 'udp ' : 'tcp '
                } `;
            if (hasError) {
                // controller.error(message);
                throw new Error(message); // cf seems has bug, controller.error will not end stream
                // webSocket.close(1000, message);
                return;
            }
            // if UDP but port not DNS port, close it
            if (isUDP) {
                if (portRemote === 53) {
                    isDns = true;
                } else {
                    // controller.error('UDP proxy only enable for DNS which is port 53');
                    throw new Error('UDP proxy only enable for DNS which is port 53'); // cf seems has bug, controller.error will not end stream
                    return;
                }
            }
            // ["version", "附加信息长度 N"]
            const vlessResponseHeader = new Uint8Array([vlessVersion[0], 0]);
            const rawClientData = chunk.slice(rawDataIndex);

            // TODO: support udp here when cf runtime has udp support
            if (isDns) {
                const { write } = await handleUDPOutBound(webSocket, vlessResponseHeader, log);
                udpStreamWrite = write;
                udpStreamWrite(rawClientData);
                return;
            }
            handleTCPOutBound(remoteSocketWapper, addressRemote, portRemote, rawClientData, webSocket, vlessResponseHeader, log);
        },
        close() {
            log(`readableWebSocketStream is close`);
        },
        abort(reason) {
            log(`readableWebSocketStream is abort`, JSON.stringify(reason));
        },
    })).catch((err) => {
        log('readableWebSocketStream pipeTo error', err);
    });

    return new Response(null, {
        status: 101,
        // @ts-ignore
        webSocket: client,
    });
}

let apiResponseCache = null;
let cacheTimeout = null;

/**
 * Fetches the API response from the server and caches it for future use.
 * @returns {Promise<object|null>} A Promise that resolves to the API response object or null if there was an error.
 */
async function fetchApiResponse() {
    const requestOptions = {
        method: 'GET',
        redirect: 'follow'
    };

    try {
        const response = await fetch(`https://${apiHost}/api/v1/server/UniProxy/user?node_id=${nodeId}&node_type=v2ray&token=${apiToken}`, requestOptions);

        if (!response.ok) {
            console.error('Error: Network response was not ok');
            return null;
        }
        const apiResponse = await response.json();
        apiResponseCache = apiResponse;

        // Refresh the cache every 5 minutes (300000 milliseconds)
        if (cacheTimeout) {
            clearTimeout(cacheTimeout);
        }
        cacheTimeout = setTimeout(() => fetchApiResponse(), 300000);

        return apiResponse;
    } catch (error) {
        console.error('Error:', error);
        return null;
    }
}

/**
 * Returns the cached API response if it exists, otherwise fetches the API response from the server and caches it for future use.
 * @returns {Promise<object|null>} A Promise that resolves to the cached API response object or the fetched API response object, or null if there was an error.
 */
async function getApiResponse() {
    if (!apiResponseCache) {
        return await fetchApiResponse();
    }
    return apiResponseCache;
}

/**
 * Checks if a given UUID is present in the API response.
 * @param {string} targetUuid The UUID to search for.
 * @returns {Promise<boolean>} A Promise that resolves to true if the UUID is present in the API response, false otherwise.
 */
async function checkUuidInApiResponse(targetUuid) {
    // Check if any of the environment variables are empty
    if (!nodeId || !apiToken || !apiHost) {
        return false;
    }

    try {
        const apiResponse = await getApiResponse();
        if (!apiResponse) {
            return false;
        }
        const isUuidInResponse = apiResponse.users.some(user => user.uuid === targetUuid);
        return isUuidInResponse;
    } catch (error) {
        console.error('Error:', error);
        return false;
    }
}

// Usage example:
//   const targetUuid = "65590e04-a94c-4c59-a1f2-571bce925aad";
//   checkUuidInApiResponse(targetUuid).then(result => console.log(result));

/**
 * Handles outbound TCP connections.
 *
 * @param {any} remoteSocket 
 * @param {string} addressRemote The remote address to connect to.
 * @param {number} portRemote The remote port to connect to.
 * @param {Uint8Array} rawClientData The raw client data to write.
 * @param {import("@cloudflare/workers-types").WebSocket} webSocket The WebSocket to pass the remote socket to.
 * @param {Uint8Array} vlessResponseHeader The VLESS response header.
 * @param {function} log The logging function.
 * @returns {Promise<void>} The remote socket.
 */
async function handleTCPOutBound(remoteSocket, addressRemote, portRemote, rawClientData, webSocket, vlessResponseHeader, log,) {
    async function connectAndWrite(address, port) {
        /** @type {import("@cloudflare/workers-types").Socket} */
        const tcpSocket = connect({
            hostname: address,
            port: port,
        });
        remoteSocket.value = tcpSocket;
        log(`connected to ${address}:${port}`);
        const writer = tcpSocket.writable.getWriter();
        await writer.write(rawClientData); // first write, nomal is tls client hello
        writer.releaseLock();
        return tcpSocket;
    }

    // if the cf connect tcp socket have no incoming data, we retry to redirect ip
    async function retry() {
        const tcpSocket = await connectAndWrite(proxyIP || addressRemote, portRemote)
        // no matter retry success or not, close websocket
        tcpSocket.closed.catch(error => {
            console.log('retry tcpSocket closed error', error);
        }).finally(() => {
            safeCloseWebSocket(webSocket);
        })
        remoteSocketToWS(tcpSocket, webSocket, vlessResponseHeader, null, log);
    }

    const tcpSocket = await connectAndWrite(addressRemote, portRemote);

    // when remoteSocket is ready, pass to websocket
    // remote--> ws
    remoteSocketToWS(tcpSocket, webSocket, vlessResponseHeader, retry, log);
}

/**
 * 
 * @param {import("@cloudflare/workers-types").WebSocket} webSocketServer
 * @param {string} earlyDataHeader for ws 0rtt
 * @param {(info: string)=> void} log for ws 0rtt
 */
function makeReadableWebSocketStream(webSocketServer, earlyDataHeader, log) {
    let readableStreamCancel = false;
    const stream = new ReadableStream({
        start(controller) {
            webSocketServer.addEventListener('message', (event) => {
                if (readableStreamCancel) {
                    return;
                }
                const message = event.data;
                controller.enqueue(message);
            });

            // The event means that the client closed the client -> server stream.
            // However, the server -> client stream is still open until you call close() on the server side.
            // The WebSocket protocol says that a separate close message must be sent in each direction to fully close the socket.
            webSocketServer.addEventListener('close', () => {
                // client send close, need close server
                // if stream is cancel, skip controller.close
                safeCloseWebSocket(webSocketServer);
                if (readableStreamCancel) {
                    return;
                }
                controller.close();
            }
            );
            webSocketServer.addEventListener('error', (err) => {
                log('webSocketServer has error');
                controller.error(err);
            }
            );
            // for ws 0rtt
            const { earlyData, error } = base64ToArrayBuffer(earlyDataHeader);
            if (error) {
                controller.error(error);
            } else if (earlyData) {
                controller.enqueue(earlyData);
            }
        },

        pull(controller) {
            // if ws can stop read if stream is full, we can implement backpressure
            // https://streams.spec.whatwg.org/#example-rs-push-backpressure
        },
        cancel(reason) {
            // 1. pipe WritableStream has error, this cancel will called, so ws handle server close into here
            // 2. if readableStream is cancel, all controller.close/enqueue need skip,
            // 3. but from testing controller.error still work even if readableStream is cancel
            if (readableStreamCancel) {
                return;
            }
            log(`ReadableStream was canceled, due to ${reason}`)
            readableStreamCancel = true;
            safeCloseWebSocket(webSocketServer);
        }
    });

    return stream;

}

// https://xtls.github.io/development/protocols/vless.html
// https://github.com/zizifn/excalidraw-backup/blob/main/v2ray-protocol.excalidraw

/**
 * 
 * @param { ArrayBuffer} vlessBuffer 
 * @param {string} userID 
 * @returns 
 */
async function processVlessHeader(
    vlessBuffer,
    userID
) {
    if (vlessBuffer.byteLength < 24) {
        return {
            hasError: true,
            message: 'invalid data',
        };
    }
    const version = new Uint8Array(vlessBuffer.slice(0, 1));
    let isValidUser = false;
    let isUDP = false;
    const slicedBuffer = new Uint8Array(vlessBuffer.slice(1, 17));
    const slicedBufferString = stringify(slicedBuffer);

    const uuids = userID.includes(',') ? userID.split(",") : [userID];

    const checkUuidInApi = await checkUuidInApiResponse(slicedBufferString);
    isValidUser = uuids.some(userUuid => checkUuidInApi || slicedBufferString === userUuid.trim());

    console.log(`checkUuidInApi: ${await checkUuidInApiResponse(slicedBufferString)}, userID: ${slicedBufferString}`);

    if (!isValidUser) {
        return {
            hasError: true,
            message: 'invalid user',
        };
    }

    const optLength = new Uint8Array(vlessBuffer.slice(17, 18))[0];
    //skip opt for now

    const command = new Uint8Array(
        vlessBuffer.slice(18 + optLength, 18 + optLength + 1)
    )[0];

    // 0x01 TCP
    // 0x02 UDP
    // 0x03 MUX
    if (command === 1) {
    } else if (command === 2) {
        isUDP = true;
    } else {
        return {
            hasError: true,
            message: `command ${command} is not support, command 01-tcp,02-udp,03-mux`,
        };
    }
    const portIndex = 18 + optLength + 1;
    const portBuffer = vlessBuffer.slice(portIndex, portIndex + 2);
    // port is big-Endian in raw data etc 80 == 0x005d
    const portRemote = new DataView(portBuffer).getUint16(0);

    let addressIndex = portIndex + 2;
    const addressBuffer = new Uint8Array(
        vlessBuffer.slice(addressIndex, addressIndex + 1)
    );

    // 1--> ipv4  addressLength =4
    // 2--> domain name addressLength=addressBuffer[1]
    // 3--> ipv6  addressLength =16
    const addressType = addressBuffer[0];
    let addressLength = 0;
    let addressValueIndex = addressIndex + 1;
    let addressValue = '';
    switch (addressType) {
        case 1:
            addressLength = 4;
            addressValue = new Uint8Array(
                vlessBuffer.slice(addressValueIndex, addressValueIndex + addressLength)
            ).join('.');
            break;
        case 2:
            addressLength = new Uint8Array(
                vlessBuffer.slice(addressValueIndex, addressValueIndex + 1)
            )[0];
            addressValueIndex += 1;
            addressValue = new TextDecoder().decode(
                vlessBuffer.slice(addressValueIndex, addressValueIndex + addressLength)
            );
            break;
        case 3:
            addressLength = 16;
            const dataView = new DataView(
                vlessBuffer.slice(addressValueIndex, addressValueIndex + addressLength)
            );
            // 2001:0db8:85a3:0000:0000:8a2e:0370:7334
            const ipv6 = [];
            for (let i = 0; i < 8; i++) {
                ipv6.push(dataView.getUint16(i * 2).toString(16));
            }
            addressValue = ipv6.join(':');
            // seems no need add [] for ipv6
            break;
        default:
            return {
                hasError: true,
                message: `invild  addressType is ${addressType}`,
            };
    }
    if (!addressValue) {
        return {
            hasError: true,
            message: `addressValue is empty, addressType is ${addressType}`,
        };
    }

    return {
        hasError: false,
        addressRemote: addressValue,
        addressType,
        portRemote,
        rawDataIndex: addressValueIndex + addressLength,
        vlessVersion: version,
        isUDP,
    };
}


/**
 * 
 * @param {import("@cloudflare/workers-types").Socket} remoteSocket 
 * @param {import("@cloudflare/workers-types").WebSocket} webSocket 
 * @param {ArrayBuffer} vlessResponseHeader 
 * @param {(() => Promise<void>) | null} retry
 * @param {*} log 
 */
async function remoteSocketToWS(remoteSocket, webSocket, vlessResponseHeader, retry, log) {
    // remote--> ws
    let remoteChunkCount = 0;
    let chunks = [];
    /** @type {ArrayBuffer | null} */
    let vlessHeader = vlessResponseHeader;
    let hasIncomingData = false; // check if remoteSocket has incoming data
    await remoteSocket.readable
        .pipeTo(
            new WritableStream({
                start() {
                },
                /**
                 * 
                 * @param {Uint8Array} chunk 
                 * @param {*} controller 
                 */
                async write(chunk, controller) {
                    hasIncomingData = true;
                    // remoteChunkCount++;
                    if (webSocket.readyState !== WS_READY_STATE_OPEN) {
                        controller.error(
                            'webSocket.readyState is not open, maybe close'
                        );
                    }
                    if (vlessHeader) {
                        webSocket.send(await new Blob([vlessHeader, chunk]).arrayBuffer());
                        vlessHeader = null;
                    } else {
                        // seems no need rate limit this, CF seems fix this??..
                        // if (remoteChunkCount > 20000) {
                        // 	// cf one package is 4096 byte(4kb),  4096 * 20000 = 80M
                        // 	await delay(1);
                        // }
                        webSocket.send(chunk);
                    }
                },
                close() {
                    log(`remoteConnection!.readable is close with hasIncomingData is ${hasIncomingData}`);
                    // safeCloseWebSocket(webSocket); // no need server close websocket frist for some case will casue HTTP ERR_CONTENT_LENGTH_MISMATCH issue, client will send close event anyway.
                },
                abort(reason) {
                    console.error(`remoteConnection!.readable abort`, reason);
                },
            })
        )
        .catch((error) => {
            console.error(
                `remoteSocketToWS has exception `,
                error.stack || error
            );
            safeCloseWebSocket(webSocket);
        });

    // seems is cf connect socket have error,
    // 1. Socket.closed will have error
    // 2. Socket.readable will be close without any data coming
    if (hasIncomingData === false && retry) {
        log(`retry`)
        retry();
    }
}

/**
 * 
 * @param {string} base64Str 
 * @returns 
 */
function base64ToArrayBuffer(base64Str) {
    if (!base64Str) {
        return { error: null };
    }
    try {
        // go use modified Base64 for URL rfc4648 which js atob not support
        base64Str = base64Str.replace(/-/g, '+').replace(/_/g, '/');
        const decode = atob(base64Str);
        const arryBuffer = Uint8Array.from(decode, (c) => c.charCodeAt(0));
        return { earlyData: arryBuffer.buffer, error: null };
    } catch (error) {
        return { error };
    }
}

/**
 * This is not real UUID validation
 * @param {string} uuid 
 */
function isValidUUID(uuid) {
    const uuidRegex = /^[0-9a-f]{8}-[0-9a-f]{4}-[4][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
    return uuidRegex.test(uuid);
}

const WS_READY_STATE_OPEN = 1;
const WS_READY_STATE_CLOSING = 2;
/**
 * Normally, WebSocket will not has exceptions when close.
 * @param {import("@cloudflare/workers-types").WebSocket} socket
 */
function safeCloseWebSocket(socket) {
    try {
        if (socket.readyState === WS_READY_STATE_OPEN || socket.readyState === WS_READY_STATE_CLOSING) {
            socket.close();
        }
    } catch (error) {
        console.error('safeCloseWebSocket error', error);
    }
}

const byteToHex = [];
for (let i = 0; i < 256; ++i) {
    byteToHex.push((i + 256).toString(16).slice(1));
}
function unsafeStringify(arr, offset = 0) {
    return (byteToHex[arr[offset + 0]] + byteToHex[arr[offset + 1]] + byteToHex[arr[offset + 2]] + byteToHex[arr[offset + 3]] + "-" + byteToHex[arr[offset + 4]] + byteToHex[arr[offset + 5]] + "-" + byteToHex[arr[offset + 6]] + byteToHex[arr[offset + 7]] + "-" + byteToHex[arr[offset + 8]] + byteToHex[arr[offset + 9]] + "-" + byteToHex[arr[offset + 10]] + byteToHex[arr[offset + 11]] + byteToHex[arr[offset + 12]] + byteToHex[arr[offset + 13]] + byteToHex[arr[offset + 14]] + byteToHex[arr[offset + 15]]).toLowerCase();
}
function stringify(arr, offset = 0) {
    const uuid = unsafeStringify(arr, offset);
    if (!isValidUUID(uuid)) {
        throw TypeError("Stringified UUID is invalid");
    }
    return uuid;
}


/**
 * 
 * @param {import("@cloudflare/workers-types").WebSocket} webSocket 
 * @param {ArrayBuffer} vlessResponseHeader 
 * @param {(string)=> void} log 
 */
async function handleUDPOutBound(webSocket, vlessResponseHeader, log) {

    let isVlessHeaderSent = false;
    const transformStream = new TransformStream({
        start(controller) {

        },
        transform(chunk, controller) {
            // udp message 2 byte is the the length of udp data
            // TODO: this should have bug, beacsue maybe udp chunk can be in two websocket message
            for (let index = 0; index < chunk.byteLength;) {
                const lengthBuffer = chunk.slice(index, index + 2);
                const udpPakcetLength = new DataView(lengthBuffer).getUint16(0);
                const udpData = new Uint8Array(
                    chunk.slice(index + 2, index + 2 + udpPakcetLength)
                );
                index = index + 2 + udpPakcetLength;
                controller.enqueue(udpData);
            }
        },
        flush(controller) {
        }
    });

    // only handle dns udp for now
    transformStream.readable.pipeTo(new WritableStream({
        async write(chunk) {
            const resp = await fetch(dohURL, // dns server url
                {
                    method: 'POST',
                    headers: {
                        'content-type': 'application/dns-message',
                    },
                    body: chunk,
                })
            const dnsQueryResult = await resp.arrayBuffer();
            const udpSize = dnsQueryResult.byteLength;
            // console.log([...new Uint8Array(dnsQueryResult)].map((x) => x.toString(16)));
            const udpSizeBuffer = new Uint8Array([(udpSize >> 8) & 0xff, udpSize & 0xff]);
            if (webSocket.readyState === WS_READY_STATE_OPEN) {
                log(`doh success and dns message length is ${udpSize}`);
                if (isVlessHeaderSent) {
                    webSocket.send(await new Blob([udpSizeBuffer, dnsQueryResult]).arrayBuffer());
                } else {
                    webSocket.send(await new Blob([vlessResponseHeader, udpSizeBuffer, dnsQueryResult]).arrayBuffer());
                    isVlessHeaderSent = true;
                }
            }
        }
    })).catch((error) => {
        log('dns udp has error' + error)
    });

    const writer = transformStream.writable.getWriter();

    return {
        /**
         * 
         * @param {Uint8Array} chunk 
         */
        write(chunk) {
            writer.write(chunk);
        }
    };
}

/**
 * 
 * @param {string} userID 
 * @param {string | null} hostName
 * @returns {string}
 */
function getVLESSConfig(userID, hostName) {
    const vlessLink = `vless://${userID}\u0040${bestCFIP}:80?encryption=none&security=none&fp=randomized&type=ws&host=${hostName}&path=%2F%3Fed%3D2560#Misaka-workers`
    const vlessTlsLink = `vless://${userID}\u0040${bestCFIP}:443?encryption=none&security=tls&sni=${hostName}&fp=randomized&type=ws&host=${hostName}&path=%2F%3Fed%3D2560#Misaka-workers-TLS`
    return `
下面是非 TLS 端口的节点信息及节点分享链接，可使用 CF 支持的非 TLS 端口：

地址：${hostName} 或 CF 优选 IP
端口：80 或 CF 支持的非 TLS 端口
UUID：${userID}
传输：ws
伪装域名：${hostName}
路径：/?ed=2048

${vlessLink}

下面是 TLS 端口的节点信息及节点分享链接，可使用 CF 支持的 TLS 端口：

地址：${hostName} 或 CF 优选 IP
端口：443 或 CF 支持的 TLS 端口
UUID：${userID}
传输：ws
传输层安全：TLS
伪装域名：${hostName}
路径：/?ed=2048
SNI 域名：${hostName}

${vlessTlsLink}

Base64 通用节点订阅链接：https://${hostName}/${userID}/base64
Clash 配置文件订阅链接：https://${hostName}/${userID}/clash
Sing-box 配置文件订阅链接：https://${hostName}/${userID}/sb

提示：部分地区有 CF 默认域名被污染的情况，除非打开客户端的 TLS 分片功能，否则无法使用 TLS 端口的节点
如为 Pages 部署的节点则只能使用 TLS 端口的节点
---------------------------------------------------------------
更多教程，请关注：小御坂的破站
`;
}

function getBase64Config(userID, hostName) {
    const vlessLinks = btoa(`vless://${userID}\u0040${bestCFIP}:80?encryption=none&security=none&fp=randomized&type=ws&host=${hostName}&path=%2F%3Fed%3D2560#Misaka-cf-vless-80\nvless://${userID}\u0040${bestCFIP}:8080?encryption=none&security=none&fp=randomized&type=ws&host=${hostName}&path=%2F%3Fed%3D2560#Misaka-cf-vless-8080\nvless://${userID}\u0040${bestCFIP}:8880?encryption=none&security=none&fp=randomized&type=ws&host=${hostName}&path=%2F%3Fed%3D2560#Misaka-cf-vless-8880\nvless://${userID}\u0040${bestCFIP}:2052?encryption=none&security=none&fp=randomized&type=ws&host=${hostName}&path=%2F%3Fed%3D2560#Misaka-cf-vless-2052\nvless://${userID}\u0040${bestCFIP}:2082?encryption=none&security=none&fp=randomized&type=ws&host=${hostName}&path=%2F%3Fed%3D2560#Misaka-cf-vless-2082\nvless://${userID}\u0040${bestCFIP}:2086?encryption=none&security=none&fp=randomized&type=ws&host=${hostName}&path=%2F%3Fed%3D2560#Misaka-cf-vless-2086\nvless://${userID}\u0040${bestCFIP}:2095?encryption=none&security=none&fp=randomized&type=ws&host=${hostName}&path=%2F%3Fed%3D2560#Misaka-cf-vless-2095\nvless://${userID}\u0040${bestCFIP}:443?encryption=none&security=tls&sni=${hostName}&fp=randomized&type=ws&host=${hostName}&path=%2F%3Fed%3D2560#Misaka-cf-vless-TLS-443\nvless://${userID}\u0040${bestCFIP}:2053?encryption=none&security=tls&sni=${hostName}&fp=randomized&type=ws&host=${hostName}&path=%2F%3Fed%3D2560#Misaka-cf-vless-TLS-2053\nvless://${userID}\u0040${bestCFIP}:2083?encryption=none&security=tls&sni=${hostName}&fp=randomized&type=ws&host=${hostName}&path=%2F%3Fed%3D2560#Misaka-cf-vless-TLS-2083\nvless://${userID}\u0040${bestCFIP}:2087?encryption=none&security=tls&sni=${hostName}&fp=randomized&type=ws&host=${hostName}&path=%2F%3Fed%3D2560#Misaka-cf-vless-TLS-2087\nvless://${userID}\u0040${bestCFIP}:2096?encryption=none&security=tls&sni=${hostName}&fp=randomized&type=ws&host=${hostName}&path=%2F%3Fed%3D2560#Misaka-cf-vless-TLS-2096\nvless://${userID}\u0040${bestCFIP}:8443?encryption=none&security=tls&sni=${hostName}&fp=randomized&type=ws&host=${hostName}&path=%2F%3Fed%3D2560#Misaka-cf-vless-TLS-8443`);

    return `${vlessLinks}`
}

function getClashConfig(userID, hostName) {
    return `port: 7890
allow-lan: true
mode: rule
log-level: info
unified-delay: true
global-client-fingerprint: chrome
dns:
  enable: true
  listen: :53
  ipv6: true
  enhanced-mode: fake-ip
  fake-ip-range: 198.18.0.1/16
  default-nameserver: 
    - 223.5.5.5
    - 114.114.114.114
    - 8.8.8.8
  nameserver:
    - https://dns.alidns.com/dns-query
    - https://doh.pub/dns-query
  fallback:
    - https://1.0.0.1/dns-query
    - tls://dns.google
  fallback-filter:
    geoip: true
    geoip-code: CN
    ipcidr:
      - 240.0.0.0/4

proxies:
- name: cf-vless-80
  type: vless
  server: ${bestCFIP}
  port: 80
  uuid: ${userID}
  udp: false
  tls: false
  network: ws
  ws-opts:
    path: "/?ed=2048"
    headers:
      Host: ${hostName}

- name: cf-vless-8080
  type: vless
  server: ${bestCFIP}
  port: 8080
  uuid: ${userID}
  udp: false
  tls: false
  network: ws
  ws-opts:
    path: "/?ed=2048"
    headers:
      Host: ${hostName}

- name: cf-vless-8880
  type: vless
  server: ${bestCFIP}
  port: 8880
  uuid: ${userID}
  udp: false
  tls: false
  network: ws
  ws-opts:
    path: "/?ed=2048"
    headers:
      Host: ${hostName}

- name: cf-vless-2052
  type: vless
  server: ${bestCFIP}
  port: 2052
  uuid: ${userID}
  udp: false
  tls: false
  network: ws
  ws-opts:
    path: "/?ed=2048"
    headers:
      Host: ${hostName}

- name: cf-vless-2082
  type: vless
  server: ${bestCFIP}
  port: 2082
  uuid: ${userID}
  udp: false
  tls: false
  network: ws
  ws-opts:
    path: "/?ed=2048"
    headers:
      Host: ${hostName}

- name: cf-vless-2086
  type: vless
  server: ${bestCFIP}
  port: 2086
  uuid: ${userID}
  udp: false
  tls: false
  network: ws
  ws-opts:
    path: "/?ed=2048"
    headers:
      Host: ${hostName}

- name: cf-vless-2095
  type: vless
  server: ${bestCFIP}
  port: 2095
  uuid: ${userID}
  udp: false
  tls: false
  network: ws
  servername: ${hostName}
  ws-opts:
    path: "/?ed=2048"
    headers:
      Host: ${hostName}

- name: cf-vless-tls-443
  type: vless
  server: ${bestCFIP}
  port: 443
  uuid: ${userID}
  udp: false
  tls: true
  network: ws
  servername: ${hostName}
  ws-opts:
    path: "/?ed=2048"
    headers:
      Host: ${hostName}

- name: cf-vless-tls-2053
  type: vless
  server: ${bestCFIP}
  port: 2053
  uuid: ${userID}
  udp: false
  tls: true
  network: ws
  servername: ${hostName}
  ws-opts:
    path: "/?ed=2048"
    headers:
      Host: ${hostName}

- name: cf-vless-tls-2083
  type: vless
  server: ${bestCFIP}
  port: 2083
  uuid: ${userID}
  udp: false
  tls: true
  network: ws
  servername: ${hostName}
  ws-opts:
    path: "/?ed=2048"
    headers:
      Host: ${hostName}

- name: cf-vless-tls-2087
  type: vless
  server: ${bestCFIP}
  port: 2087
  uuid: ${userID}
  udp: false
  tls: true
  network: ws
  servername: ${hostName}
  ws-opts:
    path: "/?ed=2048"
    headers:
      Host: ${hostName}

- name: cf-vless-tls-2096
  type: vless
  server: ${bestCFIP}
  port: 2096
  uuid: ${userID}
  udp: false
  tls: true
  network: ws
  servername: ${hostName}
  ws-opts:
    path: "/?ed=2048"
    headers:
      Host: ${hostName}

- name: cf-vless-tls-8443
  type: vless
  server: ${bestCFIP}
  port: 8443
  uuid: ${userID}
  udp: false
  tls: true
  network: ws
  servername: ${hostName}
  ws-opts:
    path: "/?ed=2048"
    headers:
      Host: ${hostName}

proxy-groups:
- name: 负载均衡
  type: load-balance
  url: http://www.gstatic.com/generate_204
  interval: 300
  proxies:
    - cf-vless-80
    - cf-vless-8080
    - cf-vless-8880
    - cf-vless-2052
    - cf-vless-2082
    - cf-vless-2086
    - cf-vless-2095
    - cf-vless-tls-443
    - cf-vless-tls-2053
    - cf-vless-tls-2083
    - cf-vless-tls-2087
    - cf-vless-tls-2096
    - cf-vless-tls-8443

- name: 自动选择
  type: url-test
  url: http://www.gstatic.com/generate_204
  interval: 300
  tolerance: 50
  proxies:
    - cf-vless-80
    - cf-vless-8080
    - cf-vless-8880
    - cf-vless-2052
    - cf-vless-2082
    - cf-vless-2086
    - cf-vless-2095
    - cf-vless-tls-443
    - cf-vless-tls-2053
    - cf-vless-tls-2083
    - cf-vless-tls-2087
    - cf-vless-tls-2096
    - cf-vless-tls-8443
    
- name: 🌍选择代理
  type: select
  proxies:
    - 负载均衡
    - 自动选择
    - DIRECT
    - cf-vless-80
    - cf-vless-8080
    - cf-vless-8880
    - cf-vless-2052
    - cf-vless-2082
    - cf-vless-2086
    - cf-vless-2095
    - cf-vless-tls-443
    - cf-vless-tls-2053
    - cf-vless-tls-2083
    - cf-vless-tls-2087
    - cf-vless-tls-2096
    - cf-vless-tls-8443

rules:
  - GEOIP,LAN,DIRECT
  - GEOIP,CN,DIRECT
  - MATCH,🌍选择代理`
}

function getSingConfig(userID, hostName) {
    return `{
  "log": {
    "disabled": false,
    "level": "info",
    "timestamp": true
  },
  "experimental": {
    "clash_api": {
      "external_controller": "127.0.0.1:9090",
      "external_ui": "ui",
      "external_ui_download_url": "",
      "external_ui_download_detour": "",
      "secret": "",
      "default_mode": "Rule"
    },
    "cache_file": {
      "enabled": true,
      "path": "cache.db",
      "store_fakeip": true
    }
  },
  "dns": {
    "servers": [
      {
        "tag": "proxydns",
        "address": "tls://8.8.8.8/dns-query",
        "detour": "select"
      },
      {
        "tag": "localdns",
        "address": "h3://223.5.5.5/dns-query",
        "detour": "direct"
      },
      {
        "address": "rcode://refused",
        "tag": "block"
      },
      {
        "tag": "dns_fakeip",
        "address": "fakeip"
      }
    ],
    "rules": [
      {
        "outbound": "any",
        "server": "localdns",
        "disable_cache": true
      },
      {
        "clash_mode": "Global",
        "server": "proxydns"
      },
      {
        "clash_mode": "Direct",
        "server": "localdns"
      },
      {
        "rule_set": "geosite-cn",
        "server": "localdns"
      },
      {
        "rule_set": "geosite-geolocation-!cn",
        "server": "proxydns"
      },
      {
        "rule_set": "geosite-geolocation-!cn",
        "query_type": [
          "A",
          "AAAA"
        ],
        "server": "dns_fakeip"
      }
    ],
    "fakeip": {
      "enabled": true,
      "inet4_range": "198.18.0.0/15",
      "inet6_range": "fc00::/18"
    },
    "independent_cache": true,
    "final": "proxydns"
  },
  "inbounds": [
    {
      "type": "tun",
      "inet4_address": "172.19.0.1/30",
      "inet6_address": "fd00::1/126",
      "auto_route": true,
      "strict_route": true,
      "sniff": true,
      "sniff_override_destination": true,
      "domain_strategy": "prefer_ipv4"
    }
  ],
  "outbounds": [
    {
      "tag": "select",
      "type": "selector",
      "default": "auto",
      "outbounds": [
        "auto",
        "cf-vless-80",
        "cf-vless-8080",
        "cf-vless-8880",
        "cf-vless-2052",
        "cf-vless-2082",
        "cf-vless-2086",
        "cf-vless-2095",
        "cf-vless-tls-443",
        "cf-vless-tls-2053",
        "cf-vless-tls-2083",
        "cf-vless-tls-2087",
        "cf-vless-tls-2096",
        "cf-vless-tls-8443"
      ]
    },
    {
      "server": "${bestCFIP}",
      "server_port": 80,
      "tag": "cf-vless-80",
      "packet_encoding": "packetaddr",
      "transport": {
        "headers": {
          "Host": [
            "${hostName}"
          ]
        },
        "path": "/",
        "type": "ws"
      },
      "type": "vless",
      "uuid": "${userID}"
    },
    {
      "server": "${bestCFIP}",
      "server_port": 8080,
      "tag": "cf-vless-8080",
      "packet_encoding": "packetaddr",
      "transport": {
        "headers": {
          "Host": [
            "${hostName}"
          ]
        },
        "path": "/",
        "type": "ws"
      },
      "type": "vless",
      "uuid": "${userID}"
    },
    {
      "server": "${bestCFIP}",
      "server_port": 8880,
      "tag": "cf-vless-8880",
      "packet_encoding": "packetaddr",
      "transport": {
        "headers": {
          "Host": [
            "${hostName}"
          ]
        },
        "path": "/",
        "type": "ws"
      },
      "type": "vless",
      "uuid": "${userID}"
    },
    {
      "server": "${bestCFIP}",
      "server_port": 2052,
      "tag": "cf-vless-2052",
      "packet_encoding": "packetaddr",
      "transport": {
        "headers": {
          "Host": [
            "${hostName}"
          ]
        },
        "path": "/",
        "type": "ws"
      },
      "type": "vless",
      "uuid": "${userID}"
    },
    {
      "server": "${bestCFIP}",
      "server_port": 2082,
      "tag": "cf-vless-2082",
      "packet_encoding": "packetaddr",
      "transport": {
        "headers": {
          "Host": [
            "${hostName}"
          ]
        },
        "path": "/",
        "type": "ws"
      },
      "type": "vless",
      "uuid": "${userID}"
    },
    {
      "server": "${bestCFIP}",
      "server_port": 2086,
      "tag": "cf-vless-2086",
      "packet_encoding": "packetaddr",
      "transport": {
        "headers": {
          "Host": [
            "${hostName}"
          ]
        },
        "path": "/",
        "type": "ws"
      },
      "type": "vless",
      "uuid": "${userID}"
    },
    {
      "server": "${bestCFIP}",
      "server_port": 2095,
      "tag": "cf-vless-2095",
      "packet_encoding": "packetaddr",
      "transport": {
        "headers": {
          "Host": [
            "${hostName}"
          ]
        },
        "path": "/",
        "type": "ws"
      },
      "type": "vless",
      "uuid": "${userID}"
    },
    {
      "server": "${bestCFIP}",
      "server_port": 443,
      "tag": "cf-vless-tls-443",
      "tls": {
        "enabled": true,
        "server_name": "${hostName}",
        "insecure": false,
        "utls": {
          "enabled": true,
          "fingerprint": "chrome"
        }
      },
      "packet_encoding": "packetaddr",
      "transport": {
        "headers": {
          "Host": [
            "${hostName}"
          ]
        },
        "path": "/",
        "type": "ws"
      },
      "type": "vless",
      "uuid": "${userID}"
    },
    {
      "server": "${bestCFIP}",
      "server_port": 2053,
      "tag": "cf-vless-tls-2053",
      "tls": {
        "enabled": true,
        "server_name": "${hostName}",
        "insecure": false,
        "utls": {
          "enabled": true,
          "fingerprint": "chrome"
        }
      },
      "packet_encoding": "packetaddr",
      "transport": {
        "headers": {
          "Host": [
            "${hostName}"
          ]
        },
        "path": "/",
        "type": "ws"
      },
      "type": "vless",
      "uuid": "${userID}"
    },
    {
      "server": "${bestCFIP}",
      "server_port": 2083,
      "tag": "cf-vless-tls-2083",
      "tls": {
        "enabled": true,
        "server_name": "${hostName}",
        "insecure": false,
        "utls": {
          "enabled": true,
          "fingerprint": "chrome"
        }
      },
      "packet_encoding": "packetaddr",
      "transport": {
        "headers": {
          "Host": [
            "${hostName}"
          ]
        },
        "path": "/",
        "type": "ws"
      },
      "type": "vless",
      "uuid": "${userID}"
    },
    {
      "server": "${bestCFIP}",
      "server_port": 2087,
      "tag": "cf-vless-tls-2087",
      "tls": {
        "enabled": true,
        "server_name": "${hostName}",
        "insecure": false,
        "utls": {
          "enabled": true,
          "fingerprint": "chrome"
        }
      },
      "packet_encoding": "packetaddr",
      "transport": {
        "headers": {
          "Host": [
            "${hostName}"
          ]
        },
        "path": "/",
        "type": "ws"
      },
      "type": "vless",
      "uuid": "${userID}"
    },
    {
      "server": "${bestCFIP}",
      "server_port": 2096,
      "tag": "cf-vless-tls-2096",
      "tls": {
        "enabled": true,
        "server_name": "${hostName}",
        "insecure": false,
        "utls": {
          "enabled": true,
          "fingerprint": "chrome"
        }
      },
      "packet_encoding": "packetaddr",
      "transport": {
        "headers": {
          "Host": [
            "${hostName}"
          ]
        },
        "path": "/",
        "type": "ws"
      },
      "type": "vless",
      "uuid": "${userID}"
    },
    {
      "server": "${bestCFIP}",
      "server_port": 8443,
      "tag": "cf-vless-tls-8443",
      "tls": {
        "enabled": true,
        "server_name": "${hostName}",
        "insecure": false,
        "utls": {
          "enabled": true,
          "fingerprint": "chrome"
        }
      },
      "packet_encoding": "packetaddr",
      "transport": {
        "headers": {
          "Host": [
            "${hostName}"
          ]
        },
        "path": "/",
        "type": "ws"
      },
      "type": "vless",
      "uuid": "${userID}"
    },
    {
      "tag": "direct",
      "type": "direct"
    },
    {
      "tag": "block",
      "type": "block"
    },
    {
      "tag": "dns-out",
      "type": "dns"
    },
    {
      "tag": "auto",
      "type": "urltest",
      "outbounds": [
        "cf-vless-80",
        "cf-vless-8080",
        "cf-vless-8880",
        "cf-vless-2052",
        "cf-vless-2082",
        "cf-vless-2086",
        "cf-vless-2095",
        "cf-vless-tls-443",
        "cf-vless-tls-2053",
        "cf-vless-tls-2083",
        "cf-vless-tls-2087",
        "cf-vless-tls-2096",
        "cf-vless-tls-8443"
      ],
      "url": "https://www.gstatic.com/generate_204",
      "interval": "1m",
      "tolerance": 50,
      "interrupt_exist_connections": false
    }
  ],
  "route": {
    "rule_set": [
      {
        "tag": "geosite-geolocation-!cn",
        "type": "remote",
        "format": "binary",
        "url": "https://cdn.jsdelivr.net/gh/MetaCubeX/meta-rules-dat@sing/geo/geosite/geolocation-!cn.srs",
        "download_detour": "select",
        "update_interval": "1d"
      },
      {
        "tag": "geosite-cn",
        "type": "remote",
        "format": "binary",
        "url": "https://cdn.jsdelivr.net/gh/MetaCubeX/meta-rules-dat@sing/geo/geosite/geolocation-cn.srs",
        "download_detour": "select",
        "update_interval": "1d"
      },
      {
        "tag": "geoip-cn",
        "type": "remote",
        "format": "binary",
        "url": "https://cdn.jsdelivr.net/gh/MetaCubeX/meta-rules-dat@sing/geo/geoip/cn.srs",
        "download_detour": "select",
        "update_interval": "1d"
      }
    ],
    "auto_detect_interface": true,
    "final": "select",
    "rules": [
      {
        "outbound": "dns-out",
        "protocol": "dns"
      },
      {
        "clash_mode": "Direct",
        "outbound": "direct"
      },
      {
        "clash_mode": "Global",
        "outbound": "select"
      },
      {
        "rule_set": "geoip-cn",
        "outbound": "direct"
      },
      {
        "rule_set": "geosite-cn",
        "outbound": "direct"
      },
      {
        "ip_is_private": true,
        "outbound": "direct"
      },
      {
        "rule_set": "geosite-geolocation-!cn",
        "outbound": "select"
      }
    ]
  },
  "ntp": {
    "enabled": true,
    "server": "time.apple.com",
    "server_port": 123,
    "interval": "30m",
    "detour": "direct"
  }
}`;
}