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import * as fs from 'fs';
import * as stream from 'stream';
import * as util from 'util';
import got, * as Got from 'got';
import { httpAgent, httpsAgent } from './fetch';
import config from '@/config/index';
import * as chalk from 'chalk';
import Logger from '@/services/logger';
import * as IPCIDR from 'ip-cidr';
const PrivateIp = require('private-ip');
const pipeline = util.promisify(stream.pipeline);
export async function downloadUrl(url: string, path: string) {
const logger = new Logger('download');
logger.info(`Downloading ${chalk.cyan(url)} ...`);
const timeout = 30 * 1000;
const operationTimeout = 60 * 1000;
const maxSize = config.maxFileSize || 262144000;
const req = got.stream(url, {
headers: {
'User-Agent': config.userAgent
},
timeout: {
lookup: timeout,
connect: timeout,
secureConnect: timeout,
socket: timeout, // read timeout
response: timeout,
send: timeout,
request: operationTimeout, // whole operation timeout
},
agent: {
http: httpAgent,
https: httpsAgent,
},
retry: 0,
}).on('response', (res: Got.Response) => {
if ((process.env.NODE_ENV === 'production' || process.env.NODE_ENV === 'test') && !config.proxy && res.ip) {
if (isPrivateIp(res.ip)) {
logger.warn(`Blocked address: ${res.ip}`);
req.destroy();
}
}
const contentLength = res.headers['content-length'];
if (contentLength != null) {
const size = Number(contentLength);
if (size > maxSize) {
logger.warn(`maxSize exceeded (${size} > ${maxSize}) on response`);
req.destroy();
}
}
}).on('downloadProgress', (progress: Got.Progress) => {
if (progress.transferred > maxSize) {
logger.warn(`maxSize exceeded (${progress.transferred} > ${maxSize}) on downloadProgress`);
req.destroy();
}
}).on('error', (e: any) => {
if (e.name === 'HTTPError') {
const statusCode = e.response?.statusCode;
const statusMessage = e.response?.statusMessage;
e.name = `StatusError`;
e.statusCode = statusCode;
e.message = `${statusCode} ${statusMessage}`;
}
});
await pipeline(req, fs.createWriteStream(path));
logger.succ(`Download finished: ${chalk.cyan(url)}`);
}
function isPrivateIp(ip: string) {
for (const net of config.allowedPrivateNetworks || []) {
const cidr = new IPCIDR(net);
if (cidr.contains(ip)) {
return false;
}
}
return PrivateIp(ip);
}
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