build simple micropub/gitea endpoint

.env

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+export GITEA_API_BASE=https://gitea.benatkin.com/api/v1
+export GITEA_USER=ben
+export GITEA_REPO=notes
+export GITEA_TOKEN=a1ba576e25dca938172496eebab5c35ed88a2889

.gitignore

@@ -0,0 +1 @@
+node_modules

app.js

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+const Koa = require('koa');
+const Router = require('@koa/router');
+const serve = require('koa-static');
+const bodyParser = require('koa-bodyparser');
+const fetch = require('isomorphic-unfetch');
+const randomBytes = require('crypto').randomBytes;
+
+const app = new Koa();
+const router = new Router();
+
+const gitea = {
+  apiBase: process.env.GITEA_API_BASE,
+  user: process.env.GITEA_USER,
+  repo: process.env.GITEA_REPO,
+  token: process.env.GITEA_TOKEN,
+};
+
+async function createNote(name, contentPlain) {
+  const content = Buffer.from(contentPlain).toString('base64');
+  const body = JSON.stringify({content});
+  const url = `${gitea.apiBase}/repos/${gitea.user}/${gitea.repo}/contents/${name}.txt`;
+  const resp = await fetch(url, {
+    method: 'POST',
+    headers: {
+      Accept: 'application/json',
+      'Content-Type': 'application/json',
+      Authorization: `token ${gitea.token}`,
+    },
+    body,
+  });
+  console.log({url, resp});
+}
+
+async function appendNote(content) {
+  const originalResp = await fetch(`${gitea.apiBase}/repos/${gitea.user}/${gitea.repo}/contents/notes.txt`, {
+    headers: {
+      Accept: 'application/json',
+      Authorization: `token ${gitea.token}`,
+    },
+  });
+  const originalData = await originalResp.json();
+  const originalContentPlain = Buffer.from(originalData.content, 'base64').toString('utf8');
+  const newContentPlain = originalContentPlain + "\n\n" + content;
+  const newContent = Buffer.from(newContentPlain).toString('base64');
+  const body = JSON.stringify({content: newContent, sha: originalData.sha});
+  const resp = await fetch(`${gitea.apiBase}/repos/${gitea.user}/${gitea.repo}/contents/notes.txt`, {
+    method: 'PUT',
+    headers: {
+      Accept: 'application/json',
+      'Content-Type': 'application/json',
+      Authorization: `token ${gitea.token}`,
+    },
+    body,
+  });
+}
+
+router.post('/micropub', async (ctx, next) => {
+  const resp = await fetch('https://tokens.indieauth.com/token', {
+    method: 'GET',
+    headers: {
+      Accept: 'application/json',
+      Authorization: ctx.headers['authorization']
+    }
+  });
+  const data = await resp.json();
+  if (!resp.ok) {
+    next();
+    return;
+  }
+  const name = randomBytes(12).toString('hex');
+  await createNote(name, ctx.request.body.content);
+  ctx.set('Location', `https://${name}.benatkin.com/`);
+  ctx.status = 201;
+  ctx.body = {};
+});
+
+router.get('/', async (ctx, next) => {
+  const host = (ctx.headers['host'] || '').replace(/\.[^.]+\.[^.*]+$/, '')
+  if (host === 'notes') {
+    return await next();
+  }
+  const url = `${gitea.apiBase}/repos/${gitea.user}/${gitea.repo}/contents/${encodeURIComponent(host)}.txt`;
+  const resp = await fetch(url, {
+    headers: {
+      Accept: 'application/json',
+      Authorization: `token ${gitea.token}`,
+    },
+  });
+  console.log({url, resp});
+  if (resp.ok) {
+    const { content } = await resp.json();
+    const contentPlain = Buffer.from(content, 'base64').toString('utf8');
+    ctx.body = contentPlain;
+  } else {
+    ctx.status = 404;
+    ctx.body = `${host} not found`;
+  }
+})
+
+router.get('/api/notes', async (ctx, next) => {
+  const resp = await fetch(`${gitea.apiBase}/repos/${gitea.user}/${gitea.repo}/contents/notes.txt`, {
+    headers: {
+      Accept: 'application/json',
+      Authorization: `token ${gitea.token}`,
+    },
+  });
+  const { content } = await resp.json();
+  const contentPlain = Buffer.from(content, 'base64').toString('utf8');
+  ctx.body = { content: contentPlain };
+});
+
+app
+  .use(bodyParser())
+  .use(router.routes())
+  .use(router.allowedMethods())
+  .use(serve('static'));
+
+app.listen(3000);

package.json

@@ -4,9 +4,18 @@
   "description": "",
   "main": "index.js",
   "scripts": {
+    "start": "node app.js",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "keywords": [],
   "author": "",
-  "license": "ISC"
+  "license": "MIT",
+  "dependencies": {
+    "@koa/router": "^10.0.0",
+    "isomorphic-unfetch": "^3.1.0",
+    "koa": "^2.13.1",
+    "koa-bodyparser": "^4.3.0",
+    "koa-static": "^5.0.0",
+    "mdast-util-from-markdown": "^0.8.5"
+  }
 }

static/app.js

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+async function getData() {
+  const resp = await fetch('/api/notes');
+  const data = await resp.json();
+  const el = document.getElementById('notes');
+  el.innerText = data.content;
+}
+
+getData();

static/index.html

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+<!doctype html>
+<head>
+  <title>Notes</title>
+  <link rel="me" href="https://github.com/benatkin">
+  <link rel="micropub" href="https://notes.benatkin.com/micropub">
+  <link rel="token_endpoint" href="https://tokens.indieauth.com/token">
+  <link rel="authorization_endpoint" href="https://indieauth.com/auth">
+  <link rel="stylesheet" href="/style.css">
+  <script type="module" src="/app.js"></script>
+  <body>
+    <pre id="notes"></pre>
+  </body>
+</head>