Handles pages router index route correctly (#125)

* Handles pages router index route correctly

Ensures that the root route is correctly served by mapping it to the "/index" route, preventing issues with cache lookups and writes.

* Version bump to 2.1.6

Author: AyronK

packages/nextjs-cache-handler/package-lock.json

@@ -18,7 +18,7 @@
     "next",
     "redis"
   ],
-  "version": "2.1.5",
+  "version": "2.1.6",
   "type": "module",
   "license": "MIT",
   "description": "Next.js cache handlers",

packages/nextjs-cache-handler/package.json

@@ -144,6 +144,10 @@ export class CacheHandler implements NextCacheHandler {
   static async #readPagesRouterPage(
     cacheKey: string,
   ): Promise<CacheHandlerValue | null> {
+    if (cacheKey === "/") {
+      cacheKey = "/index";
+    }
+
     let cacheHandlerValue: CacheHandlerValue | null = null;
     let pageHtmlHandle: fsPromises.FileHandle | null = null;
 
@@ -278,6 +282,10 @@ export class CacheHandler implements NextCacheHandler {
     cacheKey: string,
     pageData: IncrementalCachedPageValue,
   ): Promise<void> {
+    if (cacheKey === "/") {
+      cacheKey = "/index";
+    }
+
     try {
       const pageHtmlPath = path.join(
         CacheHandler.#serverDistDir,

packages/nextjs-cache-handler/src/handlers/cache-handler.ts

@@ -245,7 +245,7 @@ export async function registerInitialCache(
   ) {
     const isAppRouter = router === "app";
 
-    if (isAppRouter && cachePath === "/") {
+    if (cachePath === "/") {
       cachePath = "/index";
     }