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| Fast pages, required checks on the branch, self-hosted runners, honest incidents | 1 | import { env } from "cloudflare:workers"; |
| 2 | ||
| 3 | import type { Route } from "./+types/downloads-runner"; | |
| 4 | ||
| 5 | /** | |
| 6 | * The self-hosted runner's releases: `g1t.sh/downloads/runner/<version>/<file>`, | |
| 7 | * served from the g1t-downloads R2 bucket that scripts/runner-release.mjs | |
| 8 | * publishes to. `latest/<file>` is the newest release's, as its signed | |
| 9 | * `latest.json` names it; `latest.json` and `latest.json.sig` themselves | |
| 10 | * are what runners check before updating. | |
| 11 | */ | |
| 12 | const TYPES: Record<string, string> = { | |
| 13 | json: "application/json", | |
| 14 | sig: "text/plain; charset=utf-8", | |
| 15 | txt: "text/plain; charset=utf-8", | |
| 16 | }; | |
| 17 | ||
| 18 | async function object(key: string): Promise<R2ObjectBody | null> { | |
| 19 | const bucket = env.DOWNLOADS; | |
| 20 | return bucket ? bucket.get(key) : null; | |
| 21 | } | |
| 22 | ||
| 23 | export async function loader({ params }: Route.LoaderArgs) { | |
| 24 | const path = (params["*"] ?? "").replace(/^\/+/, ""); | |
| 25 | if (!path || path.includes("..") || !/^[A-Za-z0-9._/-]+$/.test(path)) throw new Response("Not found\n", { status: 404 }); | |
| 26 | let key = `runner/${path}`; | |
| 27 | // `latest/<file>`: the file of the newest release. | |
| 28 | if (path.startsWith("latest/")) { | |
| 29 | const manifest = await object("runner/latest.json"); | |
| 30 | if (!manifest) throw new Response("No release yet\n", { status: 404 }); | |
| 31 | const { version } = (await manifest.json()) as { version: string }; | |
| 32 | key = `runner/${version}/${path.slice("latest/".length)}`; | |
| 33 | } | |
| 34 | const found = await object(key); | |
| 35 | if (!found) throw new Response("Not found\n", { status: 404 }); | |
| 36 | const name = key.split("/").pop() ?? "g1t-runner"; | |
| 37 | const extension = name.includes(".") ? name.split(".").pop()! : ""; | |
| 38 | const headers = new Headers({ | |
| 39 | "content-type": TYPES[extension] ?? "application/octet-stream", | |
| 40 | etag: found.httpEtag, | |
| 41 | // A version's files never change; what `latest` points to does. | |
| 42 | "cache-control": path.startsWith("latest") ? "public, max-age=300" : "public, max-age=31536000, immutable", | |
| 43 | }); | |
| 44 | if (!TYPES[extension]) headers.set("content-disposition", `attachment; filename="${name}"`); | |
| 45 | return new Response(found.body, { headers }); | |
| 46 | } |