server.ts

import { Application, Router } from "https://deno.land/x/oak/mod.ts";
import { oakCors } from "https://deno.land/x/cors/mod.ts";

import * as parser from "./parser.ts";

const router = new Router();
router.get("/", (ctx) => {
  ctx.response.body = "Hello world!";
});

router.post("/", async ({ request, response }) => {
  const requestBody = request.body(); // content type automatically detected
  let content = "";
  if (requestBody.type === "json") {
    const value = await requestBody.value; // an object of parsed JSON
    content = value.content || "";
  }

  let result = parser.images(parser.annotations(parser.lineBreaks(content)));

  try {
    result = await parser.links(result);
  } catch (e) {
    console.error(e);
  }

  result = parser.etc(result);

  response.body = JSON.stringify({ content: result });
});

const app = new Application();
app.use(oakCors());
app.use(router.routes());

app.addEventListener("listen", (e) => console.log("Listening on http://localhost:8080"));
await app.listen({ port: 8080 });