app.ts

1import type { Database } from "bun:sqlite";2import { join } from "node:path";3import { Hono } from "hono";4import { bodyLimit } from "hono/body-limit";5import { secureHeaders } from "hono/secure-headers";6import { openBucket } from "../bucket/reader.ts";7import { isSafePath } from "../bucket/repo.ts";8import { registerArchivesPage } from "../pages/archives.ts";9import { registerFileRoutes } from "../pages/files.ts";10import { registerReleasesPage } from "../pages/releases.ts";11import { registerRepoPage } from "../pages/repo.ts";12import { registerSavePage } from "../pages/save.ts";13import { registerReleaseRoutes } from "../releases/routes.ts";14import { registerTarballRoutes } from "../tarball/archive.ts";15import type { Config } from "./config.ts";1617const MAX_BODY_BYTES = 64 * 1024;18const PUBLIC_DIR = join(import.meta.dir, "../../public");19// §18 allows Bunny Fonts: its stylesheet and the font files it points at.20const FONTS = "https://fonts.bunny.net";2122/** The Hono app with §25's headers and body cap, and every route built so far. */23export function createApp(config: Config, kepr: Database): Hono {24	const app = new Hono();25	// §25 allows images from the presigned host, which is the bucket endpoint's origin.26	const imgSrc =27		config.bucket.kind === "s3" ? ["'self'", new URL(config.bucket.endpoint).origin] : ["'self'"];28	app.use(29		secureHeaders({30			contentSecurityPolicy: {31				defaultSrc: ["'self'"],32				scriptSrc: ["'self'"],33				styleSrc: ["'self'", FONTS],34				fontSrc: [FONTS],35				imgSrc,36				objectSrc: ["'none'"],37				baseUri: ["'none'"],38				formAction: ["'self'"],39				frameAncestors: ["'none'"],40			},41			xFrameOptions: "DENY",42		}),43	);44	app.use(45		bodyLimit({ maxSize: MAX_BODY_BYTES, onError: (c) => c.text("Request body too large", 413) }),46	);47	app.get("/static/:path{.+}", async (c) => {48		const path = c.req.param("path");49		const file = Bun.file(join(PUBLIC_DIR, path));50		if (!isSafePath(path) || !(await file.exists())) return c.notFound();51		c.header("Cache-Control", "public, max-age=3600");52		return c.body(await file.bytes(), 200, { "Content-Type": file.type });53	});54	const ctx = { domain: config.domain, kepr, mirrorDir: join(config.dataDir, "mirror") };55	registerRepoPage(app, ctx);56	registerFileRoutes(app, ctx);57	registerSavePage(app, ctx);58	registerArchivesPage(app, ctx);59	registerReleasesPage(app, ctx);60	registerTarballRoutes(app, ctx, join(config.dataDir, "tarballs"));61	registerReleaseRoutes(app, ctx, openBucket(config.bucket));62	return app;63}