| import { nextFontError } from '../next-font-error' | |
| import { fetchResource } from './fetch-resource' | |
| import { retry } from './retry' | |
| /** | |
| * Fetches the CSS containing the @font-face declarations from Google Fonts. | |
| * The fetch has a user agent header with a modern browser to ensure we'll get .woff2 files. | |
| * | |
| * The env variable NEXT_FONT_GOOGLE_MOCKED_RESPONSES may be set containing a path to mocked data. | |
| * It's used to define mocked data to avoid hitting the Google Fonts API during tests. | |
| */ | |
| export async function fetchCSSFromGoogleFonts( | |
| url: string, | |
| fontFamily: string, | |
| isDev: boolean | |
| ): Promise<string> { | |
| if (process.env.NEXT_FONT_GOOGLE_MOCKED_RESPONSES) { | |
| const mockFile = require(process.env.NEXT_FONT_GOOGLE_MOCKED_RESPONSES) | |
| const mockedResponse = mockFile[url] | |
| if (!mockedResponse) { | |
| nextFontError('Missing mocked response for URL: ' + url) | |
| } | |
| return mockedResponse | |
| } | |
| const buffer = await retry(async () => { | |
| return fetchResource( | |
| url, | |
| isDev, | |
| `Failed to fetch font \`${fontFamily}\`: ${url}\n` + | |
| `Please check your network connection.` | |
| ) | |
| }, 3) | |
| return buffer.toString('utf8') | |
| } | |