fix(remix): Paramaterize server side transactions (#5491)

This makes sure server side transactions are parameterized correctly in Remix.

We do this by matching the server routes the same way Remix does under the hood, by reconciling the routes and URL pathname - https://github.com/remix-run/remix/blob/97999d02493e8114c39d48b76944069d58526e8d/packages/remix-server-runtime/server.ts#L36

Author: AbhiPrasad

packages/remix/src/utils/instrumentServer.ts

@@ -1,14 +1,7 @@
 /* eslint-disable max-lines */
 import { captureException, getCurrentHub } from '@sentry/node';
 import { getActiveTransaction } from '@sentry/tracing';
-import {
-  addExceptionMechanism,
-  fill,
-  loadModule,
-  logger,
-  serializeBaggage,
-  stripUrlQueryAndFragment,
-} from '@sentry/utils';
+import { addExceptionMechanism, fill, loadModule, logger, serializeBaggage } from '@sentry/utils';
 
 // Types vendored from @remix-run/[email protected]:
 // https://github.com/remix-run/remix/blob/f3691d51027b93caa3fd2cdfe146d7b62a6eb8f2/packages/remix-server-runtime/server.ts
@@ -92,6 +85,18 @@ interface DataFunction {
   (args: DataFunctionArgs): Promise<Response> | Response | Promise<AppData> | AppData;
 }
 
+interface ReactRouterDomPkg {
+  matchRoutes: (routes: ServerRoute[], pathname: string) => RouteMatch<ServerRoute>[] | null;
+}
+
+// Taken from Remix Implementation
+// https://github.com/remix-run/remix/blob/97999d02493e8114c39d48b76944069d58526e8d/packages/remix-server-runtime/routeMatching.ts#L6-L10
+export interface RouteMatch<Route> {
+  params: Params;
+  pathname: string;
+  route: Route;
+}
+
 // Taken from Remix Implementation
 // https://github.com/remix-run/remix/blob/7688da5c75190a2e29496c78721456d6e12e3abe/packages/remix-server-runtime/responses.ts#L54-L62
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
@@ -262,18 +267,61 @@ function makeWrappedMeta(origMeta: MetaFunction | HtmlMetaDescriptor = {}): Meta
   };
 }
 
-function wrapRequestHandler(origRequestHandler: RequestHandler): RequestHandler {
+function createRoutes(manifest: ServerRouteManifest, parentId?: string): ServerRoute[] {
+  return Object.entries(manifest)
+    .filter(([, route]) => route.parentId === parentId)
+    .map(([id, route]) => ({
+      ...route,
+      children: createRoutes(manifest, id),
+    }));
+}
+
+// Remix Implementation:
+// https://github.com/remix-run/remix/blob/38e127b1d97485900b9c220d93503de0deb1fc81/packages/remix-server-runtime/routeMatching.ts#L12-L24
+//
+// Changed so that `matchRoutes` function is passed in.
+function matchServerRoutes(
+  routes: ServerRoute[],
+  pathname: string,
+  pkg?: ReactRouterDomPkg,
+): RouteMatch<ServerRoute>[] | null {
+  if (!pkg) {
+    return null;
+  }
+
+  const matches = pkg.matchRoutes(routes, pathname);
+  if (!matches) {
+    return null;
+  }
+
+  return matches.map(match => ({
+    params: match.params,
+    pathname: match.pathname,
+    route: match.route,
+  }));
+}
+
+function wrapRequestHandler(origRequestHandler: RequestHandler, build: ServerBuild): RequestHandler {
+  const routes = createRoutes(build.routes);
+  const pkg = loadModule<ReactRouterDomPkg>('react-router-dom');
   return async function (this: unknown, request: Request, loadContext?: unknown): Promise<Response> {
     const hub = getCurrentHub();
     const currentScope = hub.getScope();
+
+    const url = new URL(request.url);
+    const matches = matchServerRoutes(routes, url.pathname, pkg);
+
+    const match = matches && getRequestMatch(url, matches);
+    const name = match === null ? url.pathname : match.route.id;
+    const source = match === null ? 'url' : 'route';
     const transaction = hub.startTransaction({
-      name: stripUrlQueryAndFragment(request.url),
+      name,
       op: 'http.server',
       tags: {
         method: request.method,
       },
       metadata: {
-        source: 'url',
+        source,
       },
     });
 
@@ -290,6 +338,33 @@ function wrapRequestHandler(origRequestHandler: RequestHandler): RequestHandler
   };
 }
 
+// https://github.com/remix-run/remix/blob/97999d02493e8114c39d48b76944069d58526e8d/packages/remix-server-runtime/server.ts#L573-L586
+function isIndexRequestUrl(url: URL): boolean {
+  for (const param of url.searchParams.getAll('index')) {
+    // only use bare `?index` params without a value
+    // ✅ /foo?index
+    // ✅ /foo?index&index=123
+    // ✅ /foo?index=123&index
+    // ❌ /foo?index=123
+    if (param === '') {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+// https://github.com/remix-run/remix/blob/97999d02493e8114c39d48b76944069d58526e8d/packages/remix-server-runtime/server.ts#L588-L596
+function getRequestMatch(url: URL, matches: RouteMatch<ServerRoute>[]): RouteMatch<ServerRoute> {
+  const match = matches.slice(-1)[0];
+
+  if (!isIndexRequestUrl(url) && match.route.id.endsWith('/index')) {
+    return matches.slice(-2)[0];
+  }
+
+  return match;
+}
+
 function makeWrappedCreateRequestHandler(
   origCreateRequestHandler: CreateRequestHandlerFunction,
 ): CreateRequestHandlerFunction {
@@ -316,9 +391,11 @@ function makeWrappedCreateRequestHandler(
       routes[id] = wrappedRoute;
     }
 
-    const requestHandler = origCreateRequestHandler.call(this, { ...build, routes, entry: wrappedEntry }, mode);
+    const newBuild = { ...build, routes, entry: wrappedEntry };
+
+    const requestHandler = origCreateRequestHandler.call(this, newBuild, mode);
 
-    return wrapRequestHandler(requestHandler);
+    return wrapRequestHandler(requestHandler, newBuild);
   };
 }
 

packages/remix/test/integration/test/server/loader.test.ts

@@ -8,13 +8,17 @@ describe('Remix API Loaders', () => {
     const transaction = envelope[2];
 
     assertSentryTransaction(transaction, {
+      transaction: 'routes/loader-json-response/$id',
+      transaction_info: {
+        source: 'route',
+      },
       spans: [
         {
-          description: url,
+          description: 'routes/loader-json-response/$id',
           op: 'remix.server.loader',
         },
         {
-          description: url,
+          description: 'routes/loader-json-response/$id',
           op: 'remix.server.documentRequest',
         },
       ],