82 lines
2.9 KiB
TypeScript
82 lines
2.9 KiB
TypeScript
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import { NextResponse } from 'next/server';
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import type { NextRequest } from 'next/server';
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const locales = ['zh-CN', 'zh-TW', 'en', 'ko', 'ja'];
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const defaultLocale = 'zh-CN';
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function getLocale(request: NextRequest): string {
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// Check if there is any supported locale in the pathname
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const pathname = request.nextUrl.pathname;
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const pathnameIsMissingLocale = locales.every(
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(locale) => !pathname.startsWith(`/${locale}/`) && pathname !== `/${locale}`,
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);
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// If there's no locale in the pathname, detect from headers
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if (pathnameIsMissingLocale) {
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const acceptLanguage = request.headers.get('accept-language');
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if (acceptLanguage) {
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// Parse accept-language header
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const languages = acceptLanguage.split(',').map((lang) => lang.split(';')[0].trim());
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// Find the first matching locale
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for (const lang of languages) {
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if (lang.startsWith('zh-TW') || lang.startsWith('zh-HK')) {
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return 'zh-TW';
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} else if (lang.startsWith('zh')) {
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return 'zh-CN';
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} else if (lang.startsWith('ko')) {
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return 'ko';
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} else if (lang.startsWith('ja')) {
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return 'ja';
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} else if (lang.startsWith('en')) {
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return 'en';
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}
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}
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}
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return defaultLocale;
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}
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// Extract locale from pathname
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const locale = pathname.split('/')[1];
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return locales.includes(locale) ? locale : defaultLocale;
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}
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export function middleware(request: NextRequest) {
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const pathname = request.nextUrl.pathname;
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// Skip middleware for sitemap.xml, robots.txt and other static files
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const staticFiles = ['/sitemap.xml', '/robots.txt', '/favicon.ico', '/manifest.json'];
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if (staticFiles.includes(pathname)) {
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return NextResponse.next();
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}
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// Check if there is any supported locale in the pathname
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const pathnameIsMissingLocale = locales.every(
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(locale) => !pathname.startsWith(`/${locale}/`) && pathname !== `/${locale}`,
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);
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// Redirect if there is no locale
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if (pathnameIsMissingLocale) {
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const locale = getLocale(request);
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return NextResponse.redirect(
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new URL(`/${locale}${pathname.startsWith('/') ? '' : '/'}${pathname}`, request.url),
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);
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}
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}
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export const config = {
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// Matcher ignoring static files, API routes, and special files
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matcher: [
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/*
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* Match all request paths except for the ones starting with:
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* - api (API routes)
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* - _next/static (static files)
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* - _next/image (image optimization files)
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* - favicon.ico, sitemap.xml, robots.txt (static files)
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*/
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'/((?!api|_next/static|_next/image|favicon.ico|sitemap.xml|robots.txt|manifest.json).*)',
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],
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};
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