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| The runner base keeps its old comment, so the pushed base image still matches its folder | 1 | import { RouterContextProvider, createRequestHandler } from "react-router"; |
| 2 | ||
| 3 | import { authorize, isSameOrigin, readSettings } from "../app/lib/access"; | |
| 4 | import { denied, secure } from "../app/lib/guard"; | |
| 5 | import { staffContext, zoneContext } from "../app/lib/staff"; | |
| 6 | import { readZone } from "../app/lib/time"; | |
| 7 | ||
| 8 | const requestHandler = createRequestHandler( | |
| 9 | () => import("virtual:react-router/server-build"), | |
| 10 | import.meta.env.MODE, | |
| 11 | ); | |
| 12 | ||
| 13 | /** Files the build emits for the pages; still behind the same check. */ | |
| 14 | const ASSET = /^\/(?:assets\/[\w.-]+|favicon\.svg)$/; | |
| 15 | ||
| 16 | /** | |
| 17 | * Every request, assets included, passes the same gate before anything | |
| 18 | * is served: | |
| 19 | * | |
| 20 | * 1. sudo is configured, or nothing is served at all; | |
| 21 | * 2. Cloudflare Access's token verifies (signature, audience, issuer, time); | |
| 22 | * 3. its email is on the staff list; | |
| 23 | * 4. a change is a POST from sudo's own pages. | |
| 24 | */ | |
| 25 | async function handle(request: Request, env: Env): Promise<Response> { | |
| 26 | const settings = readSettings(env); | |
| 27 | if (!settings) { | |
| 28 | return denied( | |
| 29 | 403, | |
| 30 | "sudo is not configured", | |
| 31 | "ACCESS_TEAM_DOMAIN, ACCESS_AUD and STAFF_EMAILS must all be set before sudo will answer. See apps/sudo/README.md.", | |
| 32 | ); | |
| 33 | } | |
| 34 | ||
| 35 | const auth = await authorize(request, settings); | |
| 36 | if (!auth.ok) { | |
| 37 | console.warn(JSON.stringify({ event: "sudo.denied", reason: auth.reason, email: auth.email ?? null, path: new URL(request.url).pathname })); | |
| 38 | return auth.reason === "not staff" | |
| 39 | ? denied(403, "Not staff", `${auth.email} is signed in, but is not on sudo's staff list.`) | |
| 40 | : denied(403, "Not allowed", "sudo is for g1t staff, signed in through Cloudflare Access."); | |
| 41 | } | |
| 42 | ||
| 43 | const { method } = request; | |
| 44 | if (method !== "GET" && method !== "HEAD" && method !== "POST") { | |
| 45 | return denied(405, "Method not allowed", "sudo takes GET and POST only."); | |
| 46 | } | |
| 47 | if (method === "POST" && !isSameOrigin(request)) { | |
| 48 | console.warn(JSON.stringify({ event: "sudo.cross_site", email: auth.email, origin: request.headers.get("origin") })); | |
| 49 | return denied(403, "Refused", "Changes are only accepted from sudo's own pages."); | |
| 50 | } | |
| 51 | ||
| 52 | const { pathname } = new URL(request.url); | |
| 53 | if (method !== "POST" && ASSET.test(pathname)) { | |
| 54 | return env.ASSETS.fetch(request); | |
| 55 | } | |
| 56 | ||
| 57 | if (method === "POST") { | |
| 58 | console.log(JSON.stringify({ event: "sudo.change", email: auth.email, path: pathname })); | |
| 59 | } | |
| 60 | const context = new RouterContextProvider(); | |
| 61 | context.set(staffContext, { email: auth.email }); | |
| 62 | // Times in the staff member's zone: their choice (/timezone), else where Cloudflare places them. | |
| 63 | context.set(zoneContext, readZone(request.headers.get("cookie"), (request as { cf?: { timezone?: unknown } }).cf?.timezone)); | |
| 64 | return requestHandler(request, context); | |
| 65 | } | |
| 66 | ||
| 67 | export default { | |
| 68 | async fetch(request, env) { | |
| 69 | return secure(await handle(request, env)); | |
| 70 | }, | |
| 71 | } satisfies ExportedHandler<Env>; |
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