const got = require('got'); class FileDownloader { constructor(limitDownloadSize = 0) { this.limitDownloadSize = limitDownloadSize; } async load(url, callback, abort) { let errMes = ''; const options = { encoding: null, headers: { 'user-agent': 'Mozilla/5.0 (X11; HasCodingOs 1.0; Linux x64) AppleWebKit/637.36 (KHTML, like Gecko) Chrome/70.0.3112.101 Safari/637.36 HasBrowser/5.0' } }; const response = await got(url, Object.assign({}, options, {method: 'HEAD'})); let estSize = 0; if (response.headers['content-length']) { estSize = response.headers['content-length']; } let prevProg = 0; const request = got(url, options); request.on('downloadProgress', progress => { if (this.limitDownloadSize) { if (progress.transferred > this.limitDownloadSize) { errMes = 'Файл слишком большой'; request.cancel(); } } let prog = 0; if (estSize) prog = Math.round(progress.transferred/estSize*100); else if (progress.transferred) prog = Math.round(progress.transferred/(progress.transferred + 200000)*100); if (prog != prevProg && callback) callback(prog); prevProg = prog; if (abort && abort()) { errMes = 'abort'; request.cancel(); } }); try { return (await request).body; } catch (error) { errMes = (errMes ? errMes : error.message); throw new Error(errMes); } } } module.exports = FileDownloader;