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serve.ts
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import { serve } from "https://deno.land/[email protected]/http/mod.ts";
import { serveDir } from "https://deno.land/[email protected]/http/file_server.ts";
import { basename } from "https://deno.land/[email protected]/path/mod.ts";
import { contentType } from "https://deno.land/[email protected]/media_types/mod.ts";
import {
extract,
test,
} from "https://deno.land/[email protected]/encoding/front_matter/any.ts";
import { CSS, render } from "https://deno.land/x/[email protected]/mod.ts";
import { transpileResponse } from "https://deno.land/x/[email protected]/utils/transpile_response.ts";
const WEBSITE_URL = "https://piderlab.deno.dev";
interface HtmlRenderOption {
isTopPage: boolean;
title: unknown;
description: unknown;
}
const html = (
markdown: string,
{ isTopPage, title, description }: HtmlRenderOption,
) => `
<!DOCTYPE html>
<html lang="ja">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="${description}">
<title>${title || ""} | 信州大学 実証的ソフトウェア工学研究室</title>
<meta name="theme-color" content="#333333">
<meta property="og:title" content="${title}">
<meta property="og:description" content="${description}">
<meta property="og:url" content="${WEBSITE_URL}">
<meta property="og:image" content="https://favi.deno.dev/⛺.png">
<meta property="og:type" content="website">
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:site" content="@hideakihata">
<link rel="icon" type="image/png" href="https://favi.deno.dev/⛺.png">
<link rel="apple-touch-icon" href="https://favi.deno.dev/⛺.png">
<link rel="manifest" href="/manifest.json">
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=M+PLUS+Rounded+1c&display=swap" rel="stylesheet" media="print" onload="this.media='all'">
<script>
if ('serviceWorker' in navigator) navigator.serviceWorker.register('/service_worker.js')
</script>
<style>
body {
min-height: 105vh;
}
header {
max-width: 800px;
margin: 0 auto;
padding: 0.5em 0;
}
header a {
color: #0969da;
}
main {
max-width: 800px;
margin: 0 auto;
}
a {
line-height: 1.6em;
}
${CSS}
img{
width: 80%;
display: block;
margin-left: auto;
margin-right: auto;
}
body, main.markdown-body {
font-family: 'M PLUS Rounded 1c', sans-serif;
}
</style>
<meta name="google-site-verification" content="G2ikZbSlbpd3DbXWm1J3PJfIMteHbslhMLmuk1JzwNM" />
</head>
<body>
<header>
${isTopPage ? "" : '≪ <a href="/README.md">ホームに戻る</a>'}
</header>
<main data-color-mode="light" data-light-theme="light" data-dark-theme="dark" class="markdown-body">
${render(markdown, { disableHtmlSanitization: true })}
</main>
</body>
</html>
`;
serve(async (req) => {
const res = await serveDir(req);
const { pathname } = new URL(req.url);
// トップページが404の場合（＝index.htmlが無い場合）はREADME.mdにリダイレクトする。
if (pathname.endsWith("/") && res.status === 404) {
if (await exists(new URL(import.meta.resolve(`.${pathname}README.md`)))) {
return new Response("301", {
status: 301,
headers: { location: `${pathname}README.md` },
});
}
}
if (pathname.match(/\.png$|\.jpeg$|\.jpg$|\.gif$|\.pdf$/)) {
res.headers.set("Cache-Control", `max-age=${60 * 60 * 24 * 30}`);
}
const isTopPage = pathname === "/README.md";
if (pathname.endsWith(".md")) {
// front matterを読んでタイトルを設定
let body = await res.text();
let title;
let description;
if (test(body)) {
({ body, attrs: { title, description } } = extract(body));
}
title ||= basename(pathname);
description ||=
"信州大学 工学部 電子情報システム工学科 実証的ソフトウェア工学研究室のホームページです。";
return new Response(html(body, { isTopPage, title, description }), {
headers: { "Content-Type": contentType(".html") },
});
} else if (
pathname.endsWith(".ts") ||
pathname.endsWith(".jsx") ||
pathname.endsWith(".tsx")
) {
return await transpileResponse(res, req.url);
} else {
return res;
}
});
export async function exists(filePath: string | URL): Promise<boolean> {
try {
await Deno.lstat(filePath);
return true;
} catch (error) {
if (error instanceof Deno.errors.NotFound) {
return false;
}
throw error;
}
}