allowing the base url to be overridden for the nuxt package

packages/nuxt/src/module.ts

@@ -31,6 +31,7 @@ const logtoModule: NuxtModule<LogtoRuntimeConfigInput> = defineNuxtModule<LogtoR
           signOut: '/sign-out',
           callback: '/callback',
         },
+        baseUrl: undefined,
       } satisfies LogtoRuntimeConfigInput
     );
 

packages/nuxt/src/runtime/server/event-handler.ts

@@ -19,6 +19,7 @@ export default defineEventHandler(async (event) => {
     pathnames,
     postCallbackRedirectUri,
     postLogoutRedirectUri,
+    baseUrl,
     ...clientConfig
   } = logtoConfig;
 
@@ -35,7 +36,11 @@ export default defineEventHandler(async (event) => {
     );
   }
 
-  const url = getRequestURL(event);
+  const requestUrl = getRequestURL(event);
+
+  // Use the baseUrl if provided, otherwise use the request URL
+  const url = baseUrl ? new URL(baseUrl) : requestUrl;
+
   const storage = new CookieStorage(
     {
       cookieKey: cookieName,
@@ -57,18 +62,20 @@ export default defineEventHandler(async (event) => {
     storage,
   });
 
-  if (url.pathname === pathnames.signIn) {
+  if (requestUrl.pathname === pathnames.signIn) {
     await logto.signIn(new URL(pathnames.callback, url).href);
     return;
   }
 
-  if (url.pathname === pathnames.signOut) {
+  if (requestUrl.pathname === pathnames.signOut) {
     await logto.signOut(new URL(postLogoutRedirectUri, url).href);
     return;
   }
 
-  if (url.pathname === pathnames.callback) {
-    await logto.handleSignInCallback(url.href);
+  if (requestUrl.pathname === pathnames.callback) {
+    // Use the baseUrl for the callback, but keep the original query parameters
+    const callbackUrl = new URL(requestUrl.pathname + requestUrl.search, url);
+    await logto.handleSignInCallback(callbackUrl.href);
     await sendRedirect(event, postCallbackRedirectUri, 302);
     return;
   }

packages/nuxt/src/runtime/utils/types.ts

@@ -62,6 +62,11 @@ type LogtoModuleOptions = {
      */
     callback: string;
   };
+  /**
+   * Optional override for the base URL used in redirect URIs.
+   * If not provided, the request URL will be used.
+   */
+  baseUrl?: string;
 };
 
 /** The full runtime configuration for the Logto module. */