deno_install VS router

import { App, Router } from "https://deno.land/x/[email protected]/mod.ts"; const app = new App(); const router = new Router(); // Define your API routes router.get("/hello", (ctx) => { ctx.response.body = "Hello, World!"; }); app.use(router.routes()); app.use(router.allowedMethods()); // Start the server app.listen({ port: 8000 }); console.log("Server is running on http://localhost:8000");

Deno: Deno with one of it's frameworks (like Fresh

lspconfig.denols.setup({ root_dir = lspconfig.util.root_pattern("deno.json", "deno.jsonc"), init_options = { lint = true, unstable = true, suggest = { imports = { hosts = { ["https://deno.land"] = true, ["https://cdn.nest.land"] = true, ["https://crux.land"] = true, }, }, }, }, on_attach = on_attach, })

https://deno.land/install.sh is a redirect to https://deno.land/x/install.sh, which is treated as any /x/ (community) module. These modules are immutable clones of github tags (in this case, https://github.com/denoland/deno_install/). If someone would manage to breach the AWS S3 buckets that we use for module storage, it wouldn't be just a problem for installation of the deno CLI, but a problem for any module on the registry.

In any case, Deno ships a lot more things but this is enough to get us started. Any additional information can be found on the official repository url that I will be linking at the end of the article. As for a little start, since nodejs has been used as a very popular web server, I thought it might be interesting to start building a deno version of it. To start off, let's install deno. Depending on your OS you might want to refer to Install Docs

You can find a list of different installation methods on the official deno.land documentation and the deno_install repo.

You can install Deno in a few different ways. I chose to install it with brew install deno, but you can check their docs for other methods.

See deno_install and releases for other options.

Oak is a middleware framework for Deno’s native HTTP server and Deno Deploy. It is influenced by Koa (hence the anagram) and includes a middleware router inspired by @koa/router.

The cookie part is crucial, but the CORS really depends on the implementation on bank.com. When sending an AJAX request to another domain, browsers first send a pre-flight OPTION request, to check the CORS rules on the destination domain. Only if the CORS works out will the browser send the "real" request. If bank.com implements a proper OPTION endpoint on /transfer that doesn't start any transfers, but just returns the CORS headers, the "real" transfer won't be called. It payes off to be redundant with security, so having both of these is good. If you're using Koa, koa-router has allowed methods to easily expose an OPTIONS endpoint for all other existing endpoints.