feat: add standalone mode support

packages/next/src/server/base-server.ts

@@ -138,6 +138,7 @@ import {
 } from './request-adapter/x-invoke-path-request-adapter'
 import { BaseRequestAdapter } from './request-adapter/base-request-adapter'
 import { BubbledError, isBubbledError } from './lib/trace/bubble-error'
+import { StandaloneRequestAdapter } from './request-adapter/standalone-request-adapter'
 
 export type FindComponentsResult = {
   components: LoadComponentsReturnType
@@ -550,7 +551,27 @@ export default abstract class Server<
     this.responseCache = this.getResponseCache({ dev })
 
     // Setup the request adapter.
-    if (this.minimalMode && process.env.NEXT_RUNTIME !== 'edge') {
+    if (
+      this.minimalMode &&
+      process.env.NEXT_RUNTIME !== 'edge' &&
+      this.nextConfig.output === 'standalone'
+    ) {
+      this.requestAdapter = new StandaloneRequestAdapter(
+        new XMatchedPathRequestAdapter(
+          this.buildId,
+          this.enabledDirectories,
+          this.i18nProvider,
+          this.matchers,
+          this.nextConfig,
+          this.getRoutesManifest.bind(this)
+        ),
+        new XInvokePathRequestAdapter(
+          this.enabledDirectories,
+          this.i18nProvider,
+          this.nextConfig
+        )
+      )
+    } else if (this.minimalMode && process.env.NEXT_RUNTIME !== 'edge') {
       this.requestAdapter = new XMatchedPathRequestAdapter(
         this.buildId,
         this.enabledDirectories,

packages/next/src/server/request-adapter/standalone-request-adapter.ts

@@ -0,0 +1,32 @@
+import type { BaseNextRequest } from '../base-http'
+import type { NextUrlWithParsedQuery } from '../request-meta'
+import type { RequestAdapter } from './request-adapter'
+import type { XInvokePathRequestAdapter } from './x-invoke-path-request-adapter'
+import type { XMatchedPathRequestAdapter } from './x-matched-path-request-adapter'
+
+export class StandaloneRequestAdapter<ServerRequest extends BaseNextRequest>
+  implements RequestAdapter<ServerRequest>
+{
+  constructor(
+    private readonly xMatchedPathRequestAdapter: XMatchedPathRequestAdapter<ServerRequest>,
+    private readonly xInvokePathRequestAdapter: XInvokePathRequestAdapter<ServerRequest>
+  ) {}
+
+  public async adapt(
+    req: ServerRequest,
+    parsedURL: NextUrlWithParsedQuery
+  ): Promise<void> {
+    // Today, standalone mode is used to test the x-matched-path support as
+    // well.
+
+    // FIXME: remove this fallback when the tests are updated.
+    if (
+      req.headers['x-matched-path'] &&
+      typeof req.headers['x-matched-path'] === 'string'
+    ) {
+      return this.xMatchedPathRequestAdapter.adapt(req, parsedURL)
+    }
+
+    return this.xInvokePathRequestAdapter.adapt(req, parsedURL)
+  }
+}