72 lines
1.6 KiB
TypeScript
72 lines
1.6 KiB
TypeScript
import * as Log from '../../build/output/log'
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const https = require('https')
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const CHROME_UA =
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'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36'
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const IE_UA = 'Mozilla/5.0 (Windows NT 10.0; Trident/7.0; rv:11.0) like Gecko'
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export type FontManifest = Array<{
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url: string
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content: string
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}>
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function getFontForUA(url: string, UA: string): Promise<String> {
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return new Promise((resolve, reject) => {
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let rawData: any = ''
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https
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.get(
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url,
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{
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headers: {
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'user-agent': UA,
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},
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},
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(res: any) => {
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res.on('data', (chunk: any) => {
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rawData += chunk
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})
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res.on('end', () => {
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resolve(rawData.toString('utf8'))
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})
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}
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)
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.on('error', (e: Error) => {
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reject(e)
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})
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})
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}
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export async function getFontDefinitionFromNetwork(
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url: string
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): Promise<string> {
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let result = ''
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/**
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* The order of IE -> Chrome is important, other wise chrome starts loading woff1.
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* CSS cascading 🤷♂️.
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*/
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try {
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result += await getFontForUA(url, IE_UA)
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result += await getFontForUA(url, CHROME_UA)
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} catch (e) {
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Log.warn(
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`Failed to download the stylesheet for ${url}. Skipped optimizing this font.`
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)
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return ''
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}
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return result
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}
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export function getFontDefinitionFromManifest(
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url: string,
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manifest: FontManifest
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): string {
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return (
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manifest.find((font) => {
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if (font && font.url === url) {
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return true
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}
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return false
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})?.content || ''
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)
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}
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