npm-api-analyzer/dist/packageDownloader.js

CLI tool to analyze npm packages for network API usage, prototype pollution, and security vulnerabilities

"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (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 () {
    var ownKeys = function(o) {
        ownKeys = Object.getOwnPropertyNames || function (o) {
            var ar = [];
            for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
            return ar;
        };
        return ownKeys(o);
    };
    return function (mod) {
        if (mod && mod.__esModule) return mod;
        var result = {};
        if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
        __setModuleDefault(result, mod);
        return result;
    };
})();
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.PackageDownloader = void 0;
const node_fetch_1 = __importDefault(require("node-fetch"));
const tar = __importStar(require("tar"));
const fs = __importStar(require("fs"));
const path = __importStar(require("path"));
class PackageDownloader {
    constructor(tempDir = './temp') {
        this.tempDir = tempDir;
        this.ensureTempDir();
    }
    ensureTempDir() {
        if (!fs.existsSync(this.tempDir)) {
            fs.mkdirSync(this.tempDir, { recursive: true });
        }
    }
    async getPackageInfo(packageName, version) {
        const registryUrl = `https://registry.npmjs.org/${packageName}/${version}`;
        const response = await (0, node_fetch_1.default)(registryUrl);
        if (!response.ok) {
            throw new Error(`Failed to fetch package info: ${response.statusText}`);
        }
        const packageData = await response.json();
        return {
            name: packageName,
            version: version,
            tarballUrl: packageData.dist.tarball
        };
    }
    async downloadPackage(packageInfo) {
        const packageDir = path.join(this.tempDir, `${packageInfo.name}-${packageInfo.version}`);
        // Clean up existing directory
        if (fs.existsSync(packageDir)) {
            fs.rmSync(packageDir, { recursive: true, force: true });
        }
        fs.mkdirSync(packageDir, { recursive: true });
        const response = await (0, node_fetch_1.default)(packageInfo.tarballUrl);
        if (!response.ok) {
            throw new Error(`Failed to download package: ${response.statusText}`);
        }
        // Extract tarball
        await new Promise((resolve, reject) => {
            response.body
                .pipe(tar.x({ cwd: packageDir, strip: 1 }))
                .on('error', reject)
                .on('end', resolve);
        });
        return packageDir;
    }
    cleanup() {
        if (fs.existsSync(this.tempDir)) {
            fs.rmSync(this.tempDir, { recursive: true, force: true });
        }
    }
}
exports.PackageDownloader = PackageDownloader;