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import * as tmp from 'tmp';
import * as fs from 'fs';
import * as util from 'util';
import chalk from 'chalk';
import * as request from 'request';
import Logger from '../services/logger';
import config from '../config';
const logger = new Logger('download-text-file');
export async function downloadTextFile(url: string): Promise<string> {
// Create temp file
const [path, cleanup] = await new Promise<[string, any]>((res, rej) => {
tmp.file((e, path, fd, cleanup) => {
if (e) return rej(e);
res([path, cleanup]);
});
});
logger.info(`Temp file is ${path}`);
// write content at URL to temp file
await new Promise((res, rej) => {
logger.info(`Downloading ${chalk.cyan(url)} ...`);
const writable = fs.createWriteStream(path);
writable.on('finish', () => {
logger.succ(`Download finished: ${chalk.cyan(url)}`);
res();
});
writable.on('error', error => {
logger.error(`Download failed: ${chalk.cyan(url)}: ${error}`, {
url: url,
e: error
});
rej(error);
});
const requestUrl = new URL(url).pathname.match(/[^\u0021-\u00ff]/) ? encodeURI(url) : url;
const req = request({
url: requestUrl,
proxy: config.proxy,
timeout: 10 * 1000,
headers: {
'User-Agent': config.userAgent
}
});
req.pipe(writable);
req.on('response', response => {
if (response.statusCode !== 200) {
logger.error(`Got ${response.statusCode} (${url})`);
writable.close();
rej(response.statusCode);
}
});
req.on('error', error => {
logger.error(`Failed to start download: ${chalk.cyan(url)}: ${error}`, {
url: url,
e: error
});
writable.close();
rej(error);
});
});
logger.succ(`Downloaded to: ${path}`);
const text = await util.promisify(fs.readFile)(path, 'utf8');
cleanup();
return text;
}
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