refactor: migrate OAuth result handling from sessionStorage to cookies and update connector callback implementation

- Removed the ConnectorCallbackPage component and replaced it with a route handler that sets the OAuth result in a cookie.
- Updated the useConnectorDialog hook to read from the cookie instead of sessionStorage, ensuring a more consistent state management approach.

surfsense_web/app/dashboard/[search_space_id]/connectors/callback/page.tsx

@@ -1,34 +0,0 @@
-"use client";
-
-import { useEffect } from "react";
-import { useRouter, useSearchParams } from "next/navigation";
-import { Spinner } from "@/components/ui/spinner";
-
-const OAUTH_RESULT_KEY = "connector_oauth_result";
-
-export default function ConnectorCallbackPage({
-	params,
-}: {
-	params: { search_space_id: string };
-}) {
-	const router = useRouter();
-	const searchParams = useSearchParams();
-
-	useEffect(() => {
-		const result = {
-			success: searchParams.get("success"),
-			error: searchParams.get("error"),
-			connector: searchParams.get("connector"),
-			connectorId: searchParams.get("connectorId"),
-		};
-
-		sessionStorage.setItem(OAUTH_RESULT_KEY, JSON.stringify(result));
-		router.replace(`/dashboard/${params.search_space_id}/new-chat`);
-	}, [searchParams, router, params.search_space_id]);
-
-	return (
-		<div className="flex items-center justify-center h-screen">
-			<Spinner size="lg" />
-		</div>
-	);
-}

surfsense_web/app/dashboard/[search_space_id]/connectors/callback/route.ts

@@ -0,0 +1,33 @@
+import { type NextRequest, NextResponse } from "next/server";
+
+const OAUTH_RESULT_COOKIE = "connector_oauth_result";
+
+export async function GET(
+	request: NextRequest,
+	{ params }: { params: Promise<{ search_space_id: string }> }
+) {
+	const { search_space_id } = await params;
+	const searchParams = request.nextUrl.searchParams;
+
+	const result = JSON.stringify({
+		success: searchParams.get("success"),
+		error: searchParams.get("error"),
+		connector: searchParams.get("connector"),
+		connectorId: searchParams.get("connectorId"),
+	});
+
+	const redirectUrl = new URL(
+		`/dashboard/${search_space_id}/new-chat`,
+		request.url
+	);
+
+	const response = NextResponse.redirect(redirectUrl, { status: 302 });
+	response.cookies.set(OAUTH_RESULT_COOKIE, result, {
+		path: "/",
+		maxAge: 60,
+		httpOnly: false,
+		sameSite: "lax",
+	});
+
+	return response;
+}

surfsense_web/components/assistant-ui/connector-popup/hooks/use-connector-dialog.ts

@@ -40,7 +40,19 @@ import {
 	validateIndexingConfigState,
 } from "../constants/connector-popup.schemas";
 
-const OAUTH_RESULT_KEY = "connector_oauth_result";
+const OAUTH_RESULT_COOKIE = "connector_oauth_result";
+
+function readOAuthResultCookie(): string | null {
+	const match = document.cookie
+		.split("; ")
+		.find((row) => row.startsWith(`${OAUTH_RESULT_COOKIE}=`));
+	return match ? decodeURIComponent(match.split("=").slice(1).join("=")) : null;
+}
+
+function clearOAuthResultCookie(): void {
+	// biome-ignore lint: only standard way to expire a cookie
+	document.cookie = `${OAUTH_RESULT_COOKIE}=; path=/; max-age=0`;
+}
 
 export const useConnectorDialog = () => {
 	const searchSpaceId = useAtomValue(activeSearchSpaceIdAtom);
@@ -188,11 +200,11 @@ export const useConnectorDialog = () => {
 	// Track whether the current indexing config came from an OAuth redirect
 	const [isFromOAuth, setIsFromOAuth] = useState(false);
 
-	// Consume OAuth result from sessionStorage (set by /connectors/callback page)
+	// Consume OAuth result from cookie (set by /connectors/callback route handler)
 	useEffect(() => {
-		const raw = sessionStorage.getItem(OAUTH_RESULT_KEY);
+		const raw = readOAuthResultCookie();
 		if (!raw || !searchSpaceId) return;
-		sessionStorage.removeItem(OAUTH_RESULT_KEY);
+		clearOAuthResultCookie();
 
 		let result: {
 			success: string | null;
@@ -1188,6 +1200,9 @@ export const useConnectorDialog = () => {
 				setConnectorName(null);
 				setConnectorConfig(null);
 			} else {
+				setEditingConnector(null);
+				setConnectorName(null);
+				setConnectorConfig(null);
 				setIsOpen(false);
 			}