Deno Oak Server Example

server.ts

// A simple Deno Oak web server + router that parses a greeting from the URL
// and returns it as the response body

// Import the required modules
import { Application, Router } from "https://deno.land/x/oak/mod.ts";

// Create a new instance of the Oak router
const router = new Router();

// Define our greeting route e.g. /say/{greeting}
// It's called for all HTTP verbs/requests matching the path: /say/*
router.all("/say/:greeting", (ctx, next) => {
  // Return the value of `:greeting` from the parsed URL
    ctx.response.body = `Deno says: ${ctx.params.greeting}`;
});

// Define a fallback route for any non-matching paths
router.get("/(.*)", (ctx, next) => {      
    ctx.response.body = "Enter a greeting in the URL e.g. /say/hello";
});

// Create a new instance of the Oak application
const app = new Application();

// Initalize the router middleware
app.use(router.routes());
app.use(router.allowedMethods());

// Listen to requests on the sepecified port
app.listen({ port: 8080 });