Add custom handleError (#199)

Author: brophdawg11

app/entry.server.tsx

@@ -0,0 +1,95 @@
+import { PassThrough } from "node:stream";
+
+import type {
+  AppLoadContext,
+  EntryContext,
+  HandleErrorFunction,
+} from "react-router";
+import { createReadableStreamFromReadable } from "@react-router/node";
+import { isRouteErrorResponse, ServerRouter } from "react-router";
+import { isbot } from "isbot";
+import type { RenderToPipeableStreamOptions } from "react-dom/server";
+import { renderToPipeableStream } from "react-dom/server";
+
+export const streamTimeout = 5_000;
+
+export const handleError: HandleErrorFunction = (
+  error: unknown,
+  { request }
+) => {
+  if (request.signal.aborted) {
+    // Don't log aborted requests - they're expected
+    return;
+  }
+
+  if (isRouteErrorResponse(error) && error.status === 404) {
+    // Don't log 404's - they're usually just bot noise
+    return;
+  }
+
+  if (isRouteErrorResponse(error)) {
+    console.error(error.status === 500, error.statusText, error.data);
+  } else {
+    console.error(error);
+  }
+};
+
+export default function handleRequest(
+  request: Request,
+  responseStatusCode: number,
+  responseHeaders: Headers,
+  routerContext: EntryContext,
+  loadContext: AppLoadContext
+  // If you have middleware enabled:
+  // loadContext: unstable_RouterContextProvider
+) {
+  return new Promise((resolve, reject) => {
+    let shellRendered = false;
+    let userAgent = request.headers.get("user-agent");
+
+    // Ensure requests from bots and SPA Mode renders wait for all content to load before responding
+    // https://react.dev/reference/react-dom/server/renderToPipeableStream#waiting-for-all-content-to-load-for-crawlers-and-static-generation
+    let readyOption: keyof RenderToPipeableStreamOptions =
+      (userAgent && isbot(userAgent)) || routerContext.isSpaMode
+        ? "onAllReady"
+        : "onShellReady";
+
+    const { pipe, abort } = renderToPipeableStream(
+      <ServerRouter context={routerContext} url={request.url} />,
+      {
+        [readyOption]() {
+          shellRendered = true;
+          const body = new PassThrough();
+          const stream = createReadableStreamFromReadable(body);
+
+          responseHeaders.set("Content-Type", "text/html");
+
+          resolve(
+            new Response(stream, {
+              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);
+          }
+        },
+      }
+    );
+
+    // Abort the rendering stream after the `streamTimeout` so it has time to
+    // flush down the rejected boundaries
+    setTimeout(abort, streamTimeout + 1000);
+  });
+}