api-visualizer/dist/index.js

A tunnel-based API inspector for visualizing requests and responses in real time.

"use strict";
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}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
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        ownKeys = Object.getOwnPropertyNames || function (o) {
            var ar = [];
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        __setModuleDefault(result, mod);
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})();
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.tunnelMiddleware = void 0;
exports.connectToTunnel = connectToTunnel;
const socket_io_client_1 = require("socket.io-client");
const crypto_1 = __importDefault(require("crypto"));
const Busboy = __importStar(require("busboy"));
// --- Socket Management ---
let socket = null;
let connected = false;
let apiKey = "";
const TUNNEL_URL = "https://api-visualizer-cdyu.onrender.com";
function connectToTunnel(key) {
    apiKey = key;
    socket = (0, socket_io_client_1.io)(TUNNEL_URL, {
        query: {
            apiKey,
            type: "agent",
        },
        transports: ["websocket"],
        reconnection: true,
        reconnectionDelay: 5000,
    });
    socket.on("connect", () => {
        connected = true;
        console.log("Connected to API visualizer");
    });
    socket.on("disconnect", () => {
        connected = false;
        console.warn("Disconnected from API visualizer");
    });
    socket.on("connect_error", (err) => {
        console.error("WebSocket connection error:", err.message);
    });
}
// --- Encryption ---
function encryptJSON(data, secret) {
    const iv = crypto_1.default.randomBytes(12);
    const key = crypto_1.default.createHash("sha256").update(secret).digest();
    const cipher = crypto_1.default.createCipheriv("aes-256-gcm", key, iv);
    const json = JSON.stringify(data);
    let encrypted = cipher.update(json, "utf8");
    encrypted = Buffer.concat([encrypted, cipher.final()]);
    const authTag = cipher.getAuthTag();
    return `${iv.toString("base64")}:${authTag.toString("base64")}:${encrypted.toString("base64")}`;
}
// --- Middleware ---
const tunnelMiddleware = function (req, res, outerNext) {
    const contentType = req.headers["content-type"] || "";
    // Optional multipart handler (if needed)
    if (contentType.startsWith("multipart/form-data")) {
        const busboy = new Busboy({ headers: req.headers });
        const fields = {};
        const files = [];
        busboy.on("field", (name, value) => {
            fields[name] = value;
        });
        busboy.on("file", (name, file, info) => {
            files.push({ name: info.filename, type: "file" });
            file.resume();
        });
        busboy.on("finish", () => {
            req.body = { fields, files };
            attachLogger(req, res, outerNext);
        });
        req.pipe(busboy);
    }
    else {
        attachLogger(req, res, outerNext); // let express.json() or urlencoded() handle parsing
    }
};
exports.tunnelMiddleware = tunnelMiddleware;
// --- Internal Logging Attach ---
function attachLogger(req, res, next) {
    const start = Date.now();
    const chunks = [];
    const originalWrite = res.write.bind(res);
    const originalEnd = res.end.bind(res);
    res.write = function (chunk, ...args) {
        if (chunk)
            chunks.push(Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk));
        return originalWrite(chunk, ...args);
    };
    res.end = function (chunk, ...args) {
        if (chunk)
            chunks.push(Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk));
        return originalEnd(chunk, ...args);
    };
    res.on("finish", () => {
        const duration = Date.now() - start;
        let ip = req.ip || req.socket.remoteAddress || "";
        if (ip === "::1" || ip === "::ffff:127.0.0.1")
            ip = "127.0.0.1";
        else if (ip.startsWith("::ffff:"))
            ip = ip.replace("::ffff:", "");
        const log = {
            ip,
            method: req.method,
            status: res.statusCode,
            url: req.originalUrl,
            clientPort: req.socket.remotePort,
            duration,
            timestamp: Date.now(),
            req: {
                headers: req.headers,
                body: req.body || null,
            },
            res: {
                headers: res.getHeaders(),
                body: Buffer.concat(chunks).toString(),
            },
        };
        if (socket === null || socket === void 0 ? void 0 : socket.connected) {
            try {
                const encrypted = encryptJSON(log, apiKey);
                socket.emit("log", { data: encrypted });
            }
            catch (err) {
                console.error("Failed to emit encrypted log:", err);
            }
        }
    });
    next();
}