next
Version:
The React Framework
54 lines (53 loc) • 1.9 kB
JavaScript
import path from 'path';
import * as fs from 'fs/promises';
import { constants } from 'fs';
import * as Log from '../../../../build/output/log';
import { middlewareResponse } from '../server/middleware-response';
const FONT_PREFIX = '/__nextjs_font/';
const VALID_FONTS = [
'geist-latin-ext.woff2',
'geist-mono-latin-ext.woff2',
'geist-latin.woff2',
'geist-mono-latin.woff2'
];
const FONT_HEADERS = {
'Content-Type': 'font/woff2',
'Cache-Control': 'public, max-age=31536000, immutable'
};
export function getDevOverlayFontMiddleware() {
return async function devOverlayFontMiddleware(req, res, next) {
try {
const { pathname } = new URL("http://n" + req.url);
if (!pathname.startsWith(FONT_PREFIX)) {
return next();
}
const fontFile = pathname.replace(FONT_PREFIX, '');
if (!VALID_FONTS.includes(fontFile)) {
return middlewareResponse.notFound(res);
}
const fontPath = path.resolve(__dirname, fontFile);
const fileExists = await checkFileExists(fontPath);
if (!fileExists) {
return middlewareResponse.notFound(res);
}
const fontData = await fs.readFile(fontPath);
Object.entries(FONT_HEADERS).forEach((param)=>{
let [key, value] = param;
res.setHeader(key, value);
});
res.end(fontData);
} catch (err) {
Log.error('Failed to serve font:', err instanceof Error ? err.message : err);
return middlewareResponse.internalServerError(res);
}
};
}
async function checkFileExists(filePath) {
try {
await fs.access(filePath, constants.F_OK);
return true;
} catch (e) {
return false;
}
}
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