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121 lines
3.2 KiB
121 lines
3.2 KiB
import Koa from 'koa'
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import Router from '@koa/router'
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import serve from 'koa-static'
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import bodyParser from 'koa-bodyparser'
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import fetch from 'isomorphic-unfetch'
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import { randomBytes } from 'crypto'
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import parse from "mdast-util-from-markdown"
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const app = new Koa()
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const router = new Router()
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const gitea = {
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apiBase: process.env.GITEA_API_BASE,
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user: process.env.GITEA_USER,
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repo: process.env.GITEA_REPO,
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token: process.env.GITEA_TOKEN,
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}
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async function createNote(name, contentPlain) {
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const content = Buffer.from(contentPlain).toString('base64')
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const body = JSON.stringify({ content })
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const url = `${gitea.apiBase}/repos/${gitea.user}/${gitea.repo}/contents/${name}.md`
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const resp = await fetch(url, {
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method: 'POST',
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headers: {
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Accept: 'application/json',
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'Content-Type': 'application/json',
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Authorization: `token ${gitea.token}`,
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},
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body,
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})
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}
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router.post('/micropub', async (ctx, next) => {
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const resp = await fetch('https://tokens.indieauth.com/token', {
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method: 'GET',
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headers: {
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Accept: 'application/json',
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Authorization: ctx.headers['authorization']
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}
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})
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const data = await resp.json()
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if (!resp.ok) {
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next()
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return
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}
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const name = randomBytes(12).toString('hex')
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await createNote(name, ctx.request.body.content)
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ctx.set('Location', `https://${name}.benatkin.com/`)
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ctx.status = 201
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ctx.body = {}
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})
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function readMarkdown(md) {
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const parsed = parse(value);
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const codeBlocks = parsed.children.filter((block) => block.type === "code");
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const blocks = {
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html: codeBlocks.filter((block) => block.lang === "html"),
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js: codeBlocks.filter((block) => ["js", "javascript"].includes(block.lang)),
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css: codeBlocks.filter((block) => block.lang === "css"),
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}
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const code = {
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html: blocks.html.length === 1 ? blocks.html[0].value,
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js: blocks.html.length === 1 ? blocks.js[0].value,
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css: blocks.html.length === 1 ? blocks.css[0].value,
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}
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}
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function renderSandbox({html, css, js}) {
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return `<html>
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<head>
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<title>Sandbox</title>
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${css ? `<style type="text/css">
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${css}
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</style>` : ''}
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</head>
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<body>
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${html || ''}
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${js ? `<script>
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${js}
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</script>` : ''}
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</body>
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</html>`
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}
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router.get('/', async (ctx, next) => {
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const host = (ctx.headers['host'] || '').replace(/\.[^.]+\.[^.*]+$/, '')
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if (host === 'notes') {
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return await next()
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}
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const url = `${gitea.apiBase}/repos/${gitea.user}/${gitea.repo}/contents/${encodeURIComponent(host)}.txt`
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const resp = await fetch(url, {
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headers: {
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Accept: 'application/json',
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Authorization: `token ${gitea.token}`,
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},
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})
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if (resp.ok) {
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const { content } = await resp.json()
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const contentPlain = Buffer.from(content, 'base64').toString('utf8')
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const markdownContent = readMarkdown(contentPlain)
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if (markdownContent) {
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ctx.body = renderSandbox(markdownContent)
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ctx.set('Content-Security-Policy', "default-src 'self'")
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ctx.set('Content-Type', 'text/html')
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} else {
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ctx.body = contentPlain
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}
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} else {
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ctx.status = 404
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ctx.body = `${host} not found`
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}
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})
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app
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.use(bodyParser())
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.use(router.routes())
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.use(router.allowedMethods())
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.use(serve('static'))
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app.listen(3000)
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