-
-
Save keepitsimple/337aebd3143feaa87bfcfcc6b10ba206 to your computer and use it in GitHub Desktop.
Download file by http with progress (ES6, promises, NodeJS 12.x)
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| import fs from 'fs' | |
| import http from 'http' | |
| import { basename } from 'path' | |
| import { URL } from 'url' | |
| const TIMEOUT = 10000 | |
| export default function (url, path) { | |
| const uri = new URL(url) | |
| if (!path) { | |
| path = basename(uri.pathname) | |
| } | |
| return new Promise(function (resolve, reject) { | |
| const request = http.get(uri.href).on('response', function (res) { | |
| const len = parseInt(res.headers['content-length'] as string, 10) | |
| let downloaded = 0 | |
| let percent = '0.00' | |
| if (res.statusCode !== 200) { | |
| reject(new Error(`Download request failed, response status: ${res.statusCode} ${res.statusMessage}`)) | |
| return | |
| } | |
| const file = fs.createWriteStream(path, { flags: 'wx' }) | |
| res | |
| .on('data', function (chunk) { | |
| file.write(chunk) | |
| downloaded += chunk.length | |
| percent = (100.0 * downloaded / len).toFixed(2) | |
| process.stdout.write(`Downloading ${percent}% ${downloaded} bytes\r`) | |
| }) | |
| .on('end', function () { | |
| file.end() | |
| // console.log(`${uri.pathname} downloaded to: ${path}`) | |
| resolve() | |
| }) | |
| .on('error', function (err) { | |
| file.destroy() | |
| // eslint-disable-next-line @typescript-eslint/no-empty-function | |
| fs.unlink(path, () => { }) | |
| reject(err) | |
| }) | |
| }) | |
| request.setTimeout(TIMEOUT, function () { | |
| request.abort() | |
| reject(new Error(`request timeout after ${TIMEOUT / 1000.0}s`)) | |
| }) | |
| }) | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment