nginx-binaries/lib/internal/downloadFile.js

A downloader for nginx and njs standalone binaries.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.downloadFile = void 0;
const crypto = require("node:crypto");
const node_fs_1 = require("node:fs");
const node_path_1 = require("node:path");
const stream = require("node:stream");
const node_util_1 = require("node:util");
const fetch_1 = require("./fetch");
const logger_1 = require("../logger");
const streamPipeline = (0, node_util_1.promisify)(stream.pipeline);
async function downloadFile(url, checksum, filepath, fetchOpts) {
    if (await checkFileChecksum(filepath, checksum)) {
        logger_1.log.debug(`File ${filepath} already exists`);
        return filepath;
    }
    const [hashAlg, expectedHash] = splitChecksumValue(checksum);
    const hash = crypto.createHash(hashAlg);
    logger_1.log.info(`Downloading ${url}...`);
    (0, node_fs_1.mkdirSync)((0, node_path_1.dirname)(filepath), { recursive: true });
    const resp = await (0, fetch_1.fetch)(url, fetchOpts);
    await streamPipeline(resp.body.on('data', chunk => hash.update(chunk)), (0, node_fs_1.createWriteStream)(filepath, { flags: 'w', mode: 0o0755 }));
    if (hash.digest('hex') !== expectedHash) {
        throw Error(`File ${(0, node_path_1.basename)(filepath)} is corrupted, ${hashAlg} checksum doesn't match!`);
    }
    logger_1.log.debug(`File was saved in ${filepath}`);
    return filepath;
}
exports.downloadFile = downloadFile;
async function checkFileChecksum(filepath, checksum) {
    const [hashAlg, expectedHash] = splitChecksumValue(checksum);
    const hash = crypto.createHash(hashAlg);
    try {
        await streamPipeline((0, node_fs_1.createReadStream)(filepath), hash);
        return hash.digest('hex') === expectedHash;
    }
    catch (err) {
        if (err.code === 'ENOENT' || err.code === 'EISDIR') {
            return false;
        }
        throw err;
    }
}
function splitChecksumValue(checksum) {
    const [alg, value] = checksum.split(':', 2);
    if (!alg || !value) {
        throw RangeError(`Invalid checksum value: ${checksum}`);
    }
    return [alg, value];
}
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