david_bai
61 lines
2.0 KiB
TypeScript
61 lines
2.0 KiB
TypeScript
import { NextResponse } from "next/server";
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import type { NextRequest } from "next/server";
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import { i18n } from "@/constants/i18n-config";
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import { match as matchLocale } from "@formatjs/intl-localematcher";
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import Negotiator from "negotiator";
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function getLocale(request: NextRequest): string {
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// 1. Get Accept-Language from the request
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const negotiatorHeaders: Record<string, string> = {};
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request.headers.forEach((value, key) => (negotiatorHeaders[key] = value));
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const locales = i18n.locales;
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// 2. Use negotiator to get all supported languages
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const languages = new Negotiator({ headers: negotiatorHeaders }).languages();
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try {
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// 3. Match the best language
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const locale = matchLocale(languages, locales, i18n.defaultLocale);
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return locale;
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} catch (error) {
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return i18n.defaultLocale;
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}
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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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// Get all search parameters
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const searchParams = request.nextUrl.searchParams;
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// Check if the request path already contains a language prefix
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const pathnameIsMissingLocale = i18n.locales.every(
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(locale) => !pathname.startsWith(`/${locale}/`) && pathname !== `/${locale}`
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);
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// If the path has no language prefix, redirect to a path with a language prefix
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if (pathnameIsMissingLocale) {
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const locale = getLocale(request);
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// Create a new URL, preserving the original query parameters
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const newUrl = new URL(`/${locale}${pathname}`, request.url);
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// Copy the original query parameters to the new URL
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searchParams.forEach((value, key) => {
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newUrl.searchParams.set(key, value);
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});
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return NextResponse.redirect(newUrl);
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}
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}
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export const config = {
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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 (favicon file)
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* - Or any path that contains a dot (e.g., .png, .jpg, .svg)
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*/
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matcher: "/((?!api|_next/static|_next/image|favicon.ico|.*\\..*).*)",
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};
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