msfjarvis.dev/workers-site/src/handler.ts

import { getAssetFromKV } from "@cloudflare/kv-asset-handler";

const GITHUB_USERNAME = "msfjarvis";
const APS_SLUG = "Android-Password-Store";
const GITHUB_URL = `https://github.com`;
const MY_GITHUB = `${GITHUB_URL}/${GITHUB_USERNAME}`;
const APS_GITHUB_URL = `https://github.com/${APS_SLUG}/${APS_SLUG}`;
const CSP_POLICY =
    "base-uri 'self'; connect-src 'self' insights.msfjarvis.dev utteranc.es; default-src 'self'; frame-src asciinema.org github.com platform.twitter.com utteranc.es; font-src 'self' fonts.gstatic.com; img-src 'self' data: gfycat.com imgur.com *.imgur.com insights.msfjarvis.dev syndication.twitter.com; object-src 'none'; script-src 'self' 'unsafe-hashes' asciinema.org platform.twitter.com utteranc.es insights.msfjarvis.dev 'sha256-/nV291Na1MuGRmAF5BCX/72e5aDh6O5wnlvisox+3Ts=' 'sha256-X5avg43RTxt2cSum+E3xICbowEMaOBxeBiNh05CXDTY=' 'sha256-z2izUJPvGYTnFTpFb7prEv2Soyt9qIS/B/aWU80v7As=' 'sha256-SW7YuU+FYIfxpDhNx/ozt2nByUOZMoJbUGRVtb9JMLc=' 'sha256-eyUVosQAviXm2qeOTG819D1n0kSst2gY8VmfgVsZlag='; style-src 'self' fonts.googleapis.com 'unsafe-inline'; frame-ancestors 'self';";
const PERMISSIONS_POLICY =
  "accelerometer=(), autoplay=(), camera=(), encrypted-media=(), geolocation=(), gyroscope=(), magnetometer=(), microphone=(), midi=(), payment=(), picture-in-picture=(), sync-xhr=(), usb=()";

export async function handleRequest(event: FetchEvent): Promise<Response> {
  return redirectGitHub(event);
}

async function getPageFromKV(event: FetchEvent): Promise<Response> {
  const options = {};
  try {
    const page = await getAssetFromKV(event, options);
    if (page === null) {
      throw new Error("No page found, short-circuit to 404 page");
    }
    const response = new Response(page.body, page);
    response.headers.set("X-XSS-Protection", "1; mode=block");
    response.headers.set("X-Content-Type-Options", "nosniff");
    response.headers.set("X-Frame-Options", "DENY");
    response.headers.set("Referrer-Policy", "no-referrer-when-downgrade");
    response.headers.set("Content-Security-Policy", CSP_POLICY);
    response.headers.set("Permissions-Policy", PERMISSIONS_POLICY);
    const url = event.request.url;
    if (url.endsWith("css") || url.endsWith("js") || url.endsWith("ttf")) {
      response.headers.set("Cache-Control", "public, max-age=31536000");
    }
    return response;
  } catch (e: unknown) {
    try {
      let notFoundResponse = await getAssetFromKV(event, {
        mapRequestToAsset: (req) =>
          new Request(`${new URL(req.url).origin}/404.html`, req),
      });
      return new Response(notFoundResponse.body, {
        ...notFoundResponse,
        status: 404,
      });
    } catch (e) {}
    if (e instanceof Error) {
      return new Response(e.message || e.toString(), { status: 500 });
    }
  }
  return new Response("Failed to load page", { status: 500 });
}

async function recordStatsAndRedirect(url: string): Promise<Response> {
  const key = `stats_${url}`;
  var _count = await NAMESPACE.get(key);
  if (_count == null) {
    _count = "0";
  }
  var count = parseInt(_count);
  count += 1;
  await NAMESPACE.put(key, `${count}`);
  return Response.redirect(url, 301);
}

async function redirectGitHub(event: FetchEvent): Promise<Response> {
  const urlParts = event.request.url.replace(BASE_URL, "").split("/");
  switch (urlParts[0]) {
    case "g":
      switch (urlParts.length) {
        case 1:
          return recordStatsAndRedirect(MY_GITHUB);
        case 2:
          return recordStatsAndRedirect(`${MY_GITHUB}/${urlParts[1]}`);
        case 3:
          return recordStatsAndRedirect(
            `${MY_GITHUB}/${urlParts[1]}/commit/${urlParts[2]}`
          );
        case 4:
          return recordStatsAndRedirect(
            `${MY_GITHUB}/${urlParts[1]}/issues/${urlParts[3]}`
          );
      }
    case "aps":
      switch (urlParts.length) {
        case 1:
          return recordStatsAndRedirect(APS_GITHUB_URL);
        case 2:
          return recordStatsAndRedirect(
            `${APS_GITHUB_URL}/commit/${urlParts[1]}`
          );
        case 3:
          return recordStatsAndRedirect(
            `${APS_GITHUB_URL}/issues/${urlParts[2]}`
          );
      }
    case "apsg":
      switch (urlParts.length) {
        case 1:
          return recordStatsAndRedirect(`${GITHUB_URL}/${APS_SLUG}`);
        case 2:
          return recordStatsAndRedirect(
            `${GITHUB_URL}/${APS_SLUG}/${urlParts[1]}`
          );
        case 3:
          return recordStatsAndRedirect(
            `${GITHUB_URL}/${APS_SLUG}/${urlParts[1]}/commit/${urlParts[2]}`
          );
        case 4:
          return recordStatsAndRedirect(
            `${GITHUB_URL}/${APS_SLUG}/${urlParts[1]}/issues/${urlParts[3]}`
          );
      }
    default:
      return getPageFromKV(event);
  }
}