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| Fast pages, required checks on the branch, self-hosted runners, honest incidents | 1 | import type { EntryContext, RouterContextProvider, ServerInstrumentation } from "react-router"; |
| 2 | import { ServerRouter } from "react-router"; | |
| 3 | import { isbot } from "isbot"; | |
| 4 | import { renderToReadableStream } from "react-dom/server"; | |
| 5 | ||
| 6 | import { recordHandler } from "./lib/perf.server"; | |
| 7 | ||
| 8 | // React Router's own server entry, plus the timing of every loader and | |
| 9 | // action for the Server-Timing header (lib/perf.server.ts). | |
| 10 | ||
| 11 | export const streamTimeout = 5_000; | |
| 12 | ||
| 13 | export const instrumentations: ServerInstrumentation[] = [ | |
| 14 | { | |
| 15 | route(route) { | |
| 16 | route.instrument({ | |
| 17 | async loader(handle) { | |
| 18 | const started = Date.now(); | |
| 19 | await handle(); | |
| 20 | recordHandler(route.id, "loader", Date.now() - started); | |
| 21 | }, | |
| 22 | async action(handle) { | |
| 23 | const started = Date.now(); | |
| 24 | await handle(); | |
| 25 | recordHandler(route.id, "action", Date.now() - started); | |
| 26 | }, | |
| 27 | }); | |
| 28 | }, | |
| 29 | }, | |
| 30 | ]; | |
| 31 | ||
| 32 | export default async function handleRequest( | |
| 33 | request: Request, | |
| 34 | responseStatusCode: number, | |
| 35 | responseHeaders: Headers, | |
| 36 | routerContext: EntryContext, | |
| 37 | _loadContext: RouterContextProvider, | |
| 38 | ) { | |
| 39 | // https://httpwg.org/specs/rfc9110.html#HEAD | |
| 40 | if (request.method.toUpperCase() === "HEAD") { | |
| 41 | return new Response(null, { | |
| 42 | status: responseStatusCode, | |
| 43 | headers: responseHeaders, | |
| 44 | }); | |
| 45 | } | |
| 46 | ||
| 47 | let shellRendered = false; | |
| 48 | const userAgent = request.headers.get("user-agent"); | |
| 49 | ||
| 50 | const body = await renderToReadableStream(<ServerRouter context={routerContext} url={request.url} />, { | |
| 51 | signal: AbortSignal.timeout(streamTimeout + 1000), | |
| 52 | onError(error: unknown) { | |
| 53 | responseStatusCode = 500; | |
| 54 | // Errors while streaming after the shell; those in the shell reject | |
| 55 | // and are logged by React Router. | |
| 56 | if (shellRendered) { | |
| 57 | console.error(error); | |
| 58 | } | |
| 59 | }, | |
| 60 | }); | |
| 61 | shellRendered = true; | |
| 62 | ||
| 63 | // Crawlers get the whole page at once, deferred panels included. | |
| 64 | if ((userAgent && isbot(userAgent)) || routerContext.isSpaMode) { | |
| 65 | await body.allReady; | |
| 66 | } | |
| 67 | ||
| 68 | responseHeaders.set("Content-Type", "text/html"); | |
| 69 | return new Response(body, { | |
| 70 | headers: responseHeaders, | |
| 71 | status: responseStatusCode, | |
| 72 | }); | |
| 73 | } |