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* remove request dependency * replace gulp-remote-retry-src in build scripts * fix retry delay & polish
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,69 @@ | ||
| /*--------------------------------------------------------------------------------------------- | ||
| * Copyright (c) Microsoft Corporation. All rights reserved. | ||
| * Licensed under the MIT License. See License.txt in the project root for license information. | ||
| *--------------------------------------------------------------------------------------------*/ | ||
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| import * as es from 'event-stream'; | ||
| import fetch, { RequestInit } from 'node-fetch'; | ||
| import * as VinylFile from 'vinyl'; | ||
| import * as through2 from 'through2'; | ||
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| export interface IOptions { | ||
| base?: string; | ||
| buffer?: boolean; | ||
| fetchOptions?: RequestInit; | ||
| } | ||
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| export function remote(urls: string[] | string, options: IOptions): es.ThroughStream { | ||
| if (options === undefined) { | ||
| options = {}; | ||
| } | ||
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| if (typeof options.base !== 'string' && options.base !== null) { | ||
| options.base = '/'; | ||
| } | ||
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| if (typeof options.buffer !== 'boolean') { | ||
| options.buffer = true; | ||
| } | ||
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| if (!Array.isArray(urls)) { | ||
| urls = [urls]; | ||
| } | ||
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| return es.readArray(urls).pipe(es.map<string, VinylFile | void>((data: string, cb) => { | ||
| const url = [options.base, data].join(''); | ||
| fetchWithRetry(url, options).then(file => { | ||
| cb(undefined, file); | ||
| }, error => { | ||
| cb(error); | ||
| }); | ||
| })); | ||
| } | ||
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| async function fetchWithRetry(url: string, options: IOptions, retries = 3, retryDelay = 1000): Promise<VinylFile> { | ||
| try { | ||
| const response = await fetch(url, options.fetchOptions); | ||
| if (response.ok && (response.status >= 200 && response.status < 300)) { | ||
| // request must be piped out once created, or we'll get this error: "You cannot pipe after data has been emitted from the response." | ||
| const contents = options.buffer ? await response.buffer() : response.body.pipe(through2()); | ||
| return new VinylFile({ | ||
| cwd: '/', | ||
| base: options.base, | ||
| path: url, | ||
| contents | ||
| }); | ||
| } | ||
| throw new Error(`Request ${url} failed with status code: ${response.status}`); | ||
| } catch (e) { | ||
| if (retries > 0) { | ||
| await new Promise(c => setTimeout(c, retryDelay)); | ||
| return fetchWithRetry(url, options, retries - 1, retryDelay * 3); | ||
| } | ||
| throw e; | ||
| } | ||
| } | ||
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