fix(i18n): fix change locale from navigate

packages/brisa/src/utils/get-locale-from-request/index.test.ts

@@ -27,16 +27,6 @@ describe('utils', () => {
       expect(locale).toBe('ru');
     });
 
-    it('should return req.i18n.locale when exist', () => {
-      const request = extendRequestContext({
-        originalRequest: new Request('https://example.com/ru'),
-      });
-      request.i18n = { locale: 'en' } as any;
-      const locale = getLocaleFromRequest(request);
-
-      expect(locale).toBe('en');
-    });
-
     it('should return default locale if not locale', () => {
       const request = extendRequestContext({
         originalRequest: new Request('https://example.com'),

packages/brisa/src/utils/get-locale-from-request/index.ts

@@ -2,8 +2,6 @@ import { getConstants } from '@/constants';
 import type { I18nConfig, RequestContext } from '@/types';
 
 export default function getLocaleFromRequest(request: RequestContext): string {
-  if (request.i18n?.locale) return request.i18n.locale;
-
   const { I18N_CONFIG = {} as I18nConfig, LOCALES_SET } = getConstants();
   const { pathname } = new URL(request.finalURL);
   const [, locale] = pathname.split('/');

packages/brisa/src/utils/handle-i18n/index.test.ts

@@ -436,6 +436,19 @@ describe.each(BASE_PATHS)('handleI18n util %s', (basePath) => {
       expect(req.i18n.locale).toBe('ru');
     });
 
+    it('should not redirect to force another language different than the accept-language header', () => {
+      const req = extendRequestContext({
+        originalRequest: new Request('http://localhost:3000/ru/foo', {
+          headers: {
+            'Accept-Language': 'en-GB,en;q=0.9',
+          },
+        }),
+      });
+      req.finalURL = 'http://localhost:3000/ru/foo';
+      const { response } = handleI18n(req);
+      expect(response).toBeUndefined();
+    });
+
     it('should redirect to the last browser language as default locale if there is no locale in the URL', () => {
       const req = extendRequestContext({
         originalRequest: new Request('https://example.com', {

packages/brisa/src/utils/resolve-action/index.test.tsx

@@ -18,6 +18,7 @@ let mockLog: ReturnType<typeof spyOn>;
 const getReq = (url = 'http://localhost', ...params: any) =>
   extendRequestContext({
     originalRequest: new Request(url, {
+      method: 'POST',
       headers: {
         'x-action': 'some-action',
       },
@@ -432,7 +433,7 @@ describe('utils', () => {
         normalizeHTML(`<div>
           Test <some-web-component-to-transfer-store></some-web-component-to-transfer-store>
         </div>
-        <script id="init-S">window._S=[["foo","bar"]]</script>`),
+        <script>window._S=[["foo","bar"]];for(let [k, v] of _S) _s?.set?.(k, v)</script>`),
       );
     });
 
@@ -535,6 +536,46 @@ describe('utils', () => {
       expect(response.headers.get('X-Mode')).toBe('reactivity');
     });
 
+    it('should be possible to navigate to another i18n locale + accept-language header', async () => {
+      globalThis.mockConstants = {
+        ...(getConstants() ?? {}),
+        PAGES_DIR,
+        BUILD_DIR,
+        SRC_DIR: BUILD_DIR,
+        ASSETS_DIR,
+        LOCALES_SET: new Set(['en', 'es', 'ca']),
+        I18N_CONFIG: {
+          locales: ['en', 'es', 'ca'],
+          defaultLocale: 'en',
+        },
+      };
+      const error = new Error('/ca');
+      error.name = 'navigate:native';
+
+      const req = getReq('http://localhost/en');
+      req.i18n = {
+        defaultLocale: 'en',
+        locales: ['en', 'es', 'ca'],
+        locale: 'en',
+        t: (v) => v,
+        pages: {},
+        overrideMessages: () => {},
+      };
+      req.headers.set(
+        'accept-language',
+        'en,es-ES;q=0.9,es;q=0.8,de-CH;q=0.7,de;q=0.6,pt;q=0.5',
+      );
+      const response = await resolveAction({
+        req,
+        error,
+        actionId: 'a1_1',
+        component: () => <div />,
+      });
+
+      expect(response.headers.get('X-Navigate')).toBe('/ca');
+      expect(response.headers.get('X-Mode')).toBe('native');
+    });
+
     it('should navigate with trailing slash', async () => {
       globalThis.mockConstants = {
         ...(getConstants() ?? {}),

packages/brisa/src/utils/transfer-store-service/index.ts

@@ -14,7 +14,11 @@ export default async function transferStoreService(req: RequestContext) {
   const isFormData = contentType?.includes('multipart/form-data');
   const formData = isFormData && bodyAvailable ? await req.formData() : null;
   const encryptedKeys = new Set<string>();
-  const body = !isFormData && bodyAvailable ? await reqClone.json() : null;
+  const body =
+    !isFormData && bodyAvailable
+      ? await reqClone.json().catch(() => null)
+      : null;
+
   const originalStoreEntries = formData
     ? JSON.parse(formData.get('x-s')?.toString() ?? '[]')
     : body?.['x-s'];