12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
import { readableStreamFromReader } from "https://deno.land/std@0.136.0/streams/conversion.ts";import log from "../lib/log.ts";import { builtinModuleExts, getDeploymentId, regFullVersion } from "./helpers.ts";import type { AlephConfig } from "./types.ts";
export default {  test: (pathname: string) => {    return pathname.startsWith("/-/") ||      (builtinModuleExts.find((ext) => pathname.endsWith(`.${ext}`)) && !pathname.endsWith(".d.ts")) ||      pathname.endsWith(".css");  },  fetch: async (req: Request): Promise<Response> => {    const config: AlephConfig | undefined = Reflect.get(globalThis, "__ALEPH_CONFIG");    const outputDir = config?.build?.outputDir ?? "dist";    const { pathname, searchParams } = new URL(req.url);    try {      let filePath = `./${outputDir}${pathname}`;      let ctype = "application/javascript; charset=utf-8";      if (        searchParams.has("module") ||        (pathname.startsWith("/-/esm.sh/") && !pathname.endsWith(".js") && !pathname.endsWith(".css"))      ) {        filePath += ".js";      }      if (pathname.endsWith(".css") && !searchParams.has("module")) {        ctype = "text/css; charset=utf-8";      }      const headers = new Headers({ "Content-Type": ctype });      const deployId = getDeploymentId();      let etag: string | null = null;      if (deployId) {        etag = `W/${btoa(pathname).replace(/[^a-z0-9]/g, "")}-${deployId}`;      } else {        const stat = await Deno.lstat(filePath);        if (!stat.isFile) {          return new Response("File Not Found", { status: 404 });        }        const { mtime, size } = stat;        if (mtime) {          etag = `W/${mtime.getTime().toString(16)}-${size.toString(16)}`;          headers.append("Last-Modified", new Date(mtime).toUTCString());        }      }      if (etag && req.headers.get("If-None-Match") === etag) {        return new Response(null, { status: 304 });      }      const file = await Deno.open(filePath, { read: true });      if (etag) {        headers.append("Etag", etag);      }      if (searchParams.get("v") || (pathname.startsWith("/-/") && regFullVersion.test(pathname))) {        headers.append("Cache-Control", "public, max-age=31536000, immutable");      }      return new Response(readableStreamFromReader(file), { headers });    } catch (err) {      if (err instanceof Deno.errors.NotFound) {        return new Response("File Not Found", { status: 404 });      }      log.error(err);      return new Response("Internal Server Error", { status: 500 });    }  },};