download file like a vampire
- skip mechanism, local file & content-length
- retry / timeout support
- stream to file, not ate memory like the download module
- download progress support, via awesome got module
$ npm i dl-vampire --saveimport dl, { Vampire, readUrl } from 'dl-vampire'| name | type | required | default value | description |
|---|---|---|---|---|
options.url |
String |
true |
the download url | |
options.file |
String |
true |
the local target file path | |
options.onprogress |
function(progress) |
got downloadProgress event listener |
||
options.retry |
Object |
{times: 5, timeout: false} |
retry options, will pass to promise.retry | |
options.skipExists |
boolean |
true |
if local file already exists AND file stat size match response content-length size, the download will be skiped |
|
options.expectSize |
number |
validate local file stat.size === expectSize, if check pass the download will be skiped |
||
options.expectHash |
string |
validate local file file.hash === expectHash, using expectHashAlgorithm if check pass the download will be skiped |
||
options.expectHashAlgorithm |
string |
'md5' |
the expect hash algorithm, default md5
|
|
options.useChromeUa |
Boolean |
true |
use user-agent of the Chrome Browser |
|
options.useProxyEnv |
Boolean |
true |
use proxy-agent module, will use http_proxy / https_proxy / all_proxy env variable |
|
options.requestOptions |
Object |
custom request options, see request options |
- if finally the download is skiped, the return promise will resolve to
{skip: true} - else it will resolve to
{skip: false}
| name | type | description |
|---|---|---|
options.retry.times |
Number |
max retry times |
options.retry.timeout |
Number / false
|
false disables timeout check, Number: max wait in ms |
options.retry.onerror |
function(err, index) |
when retry happens, this hook will be called, whether a normal error or a timeout error, index is 0 based |
more see https://github.com/magicdawn/promise.retry
// options for dl() / readUrl()
import type { DlOptions, ReadUrlOptions, ReadUrlOptionsWithEncoding } from 'dl-vampire'
// onpregress type, and progress arg type
import type { OnProgress, Progress } from 'dl-vampire'the MIT License http://magicdawn.mit-license.org
