feat: upgrade entry.server from remix v1.18

Author: mhaidarhanif

app/entry.server.tsx

@@ -1,29 +1,142 @@
+/**
+ * By default, Remix will handle generating the HTTP Response for you.
+ * You are free to delete this file if you'd like to, but if you ever want it revealed again, you can run `npx remix reveal` ✨
+ * For more information, see https://remix.run/file-conventions/entry.server
+ */
+
+import { PassThrough } from "node:stream";
+
+import type { AppLoadContext, EntryContext } from "@remix-run/node";
+import { Response } from "@remix-run/node";
 import { RemixServer } from "@remix-run/react";
-import { renderToString } from "react-dom/server";
+import isbot from "isbot";
+import { renderToPipeableStream } from "react-dom/server";
 
 import { seoRouteHandlers } from "./seo-routes.server";
 
-import type { EntryContext } from "@remix-run/node";
+const ABORT_DELAY = 5_000;
 
 export default async function handleRequest(
   request: Request,
   responseStatusCode: number,
   responseHeaders: Headers,
-  remixContext: EntryContext
+  remixContext: EntryContext,
+  loadContext: AppLoadContext
 ) {
   for (const handler of seoRouteHandlers) {
     const seoRouteResponse = await handler(request, remixContext);
     if (seoRouteResponse) return seoRouteResponse;
   }
 
-  const markup = renderToString(
-    <RemixServer context={remixContext} url={request.url} />
-  );
+  return isbot(request.headers.get("user-agent"))
+    ? handleBotRequest(
+        request,
+        responseStatusCode,
+        responseHeaders,
+        remixContext
+      )
+    : handleBrowserRequest(
+        request,
+        responseStatusCode,
+        responseHeaders,
+        remixContext
+      );
+}
+
+function handleBotRequest(
+  request: Request,
+  responseStatusCode: number,
+  responseHeaders: Headers,
+  remixContext: EntryContext
+) {
+  return new Promise((resolve, reject) => {
+    let shellRendered = false;
+    const { pipe, abort } = renderToPipeableStream(
+      <RemixServer
+        context={remixContext}
+        url={request.url}
+        abortDelay={ABORT_DELAY}
+      />,
+      {
+        onAllReady() {
+          shellRendered = true;
+          const body = new PassThrough();
+
+          responseHeaders.set("Content-Type", "text/html");
+
+          resolve(
+            new Response(body, {
+              headers: responseHeaders,
+              status: responseStatusCode,
+            })
+          );
+
+          pipe(body);
+        },
+        onShellError(error: unknown) {
+          reject(error);
+        },
+        onError(error: unknown) {
+          responseStatusCode = 500;
+          // Log streaming rendering errors from inside the shell.  Don't log
+          // errors encountered during initial shell rendering since they'll
+          // reject and get logged in handleDocumentRequest.
+          if (shellRendered) {
+            console.error(error);
+          }
+        },
+      }
+    );
+
+    setTimeout(abort, ABORT_DELAY);
+  });
+}
+
+function handleBrowserRequest(
+  request: Request,
+  responseStatusCode: number,
+  responseHeaders: Headers,
+  remixContext: EntryContext
+) {
+  return new Promise((resolve, reject) => {
+    let shellRendered = false;
+    const { pipe, abort } = renderToPipeableStream(
+      <RemixServer
+        context={remixContext}
+        url={request.url}
+        abortDelay={ABORT_DELAY}
+      />,
+      {
+        onShellReady() {
+          shellRendered = true;
+          const body = new PassThrough();
+
+          responseHeaders.set("Content-Type", "text/html");
+
+          resolve(
+            new Response(body, {
+              headers: responseHeaders,
+              status: responseStatusCode,
+            })
+          );
 
-  responseHeaders.set("Content-Type", "text/html");
+          pipe(body);
+        },
+        onShellError(error: unknown) {
+          reject(error);
+        },
+        onError(error: unknown) {
+          responseStatusCode = 500;
+          // Log streaming rendering errors from inside the shell.  Don't log
+          // errors encountered during initial shell rendering since they'll
+          // reject and get logged in handleDocumentRequest.
+          if (shellRendered) {
+            console.error(error);
+          }
+        },
+      }
+    );
 
-  return new Response("<!DOCTYPE html>" + markup, {
-    headers: responseHeaders,
-    status: responseStatusCode,
+    setTimeout(abort, ABORT_DELAY);
   });
 }