import express from "express";
import React from "react";
import fs from "fs";
import ReactDOMServer from "react-dom/server";
import { Builder } from "xml2js";
import cryptoRandomString from "crypto-random-string";
export const webServer = express()
.use(express.static("static"))
.use(express.urlencoded({ extended: true }))
.get("/", (req, res) =>
res.send(
renderHtml(
)
)
)
.post("/", (req, res) => {
const inbox: Inbox = { name: req.body.name, token: newToken() };
fs.writeFileSync(feedPath(inbox.token), renderXml(Feed(inbox)));
res.send(
renderHtml(
)
);
})
.listen(8443);
type Inbox = {
name: string;
token: string;
};
function Layout({ children }: { children: React.ReactNode }) {
return (
Kill the Newsletter!
{children}
);
}
function Form() {
return (
);
}
function Created({ inbox: { name, token } }: { inbox: Inbox }) {
return (
<>
“{name}” Inbox Created
Sign up for the newsletter with
{feedEmail(token)}
Subscribe to the Atom feed at
{feedUrl(token)}
Don’t share these addresses.
They contain a security token that other people could use
to send you spam and to control your newsletter subscriptions.
Enjoy your readings!
Create Another Inbox
);
}
// https://validator.w3.org/feed/docs/atom.html
// https://validator.w3.org/feed/#validate_by_input
function Feed(inbox: Inbox) {
const { name, token } = inbox;
return {
feed: {
$: { xmlns: "http://www.w3.org/2005/Atom" },
link: [
{
$: {
rel: "self",
type: "application/atom+xml",
href: feedUrl(token)
}
},
{
$: {
rel: "alternate",
type: "text/html",
href: "https://www.kill-the-newsletter.com/"
}
}
],
id: id(token),
title: name,
subtitle: `Kill the Newsletter! Inbox “${feedEmail(token)}”`,
updated: now(),
...Entry({
title: `“${name}” Inbox Created`,
author: "Kill the Newsletter!",
content: ReactDOMServer.renderToStaticMarkup(
)
})
}
};
}
function Entry({
title,
author,
content
}: {
title: string;
author: string;
content: string;
}) {
return {
entry: {
id: id(newToken()),
title,
author: { name: author },
updated: now(),
content: { $: { type: "html" }, _: content }
}
};
}
function newToken() {
return cryptoRandomString({
length: 20,
characters: "1234567890qwertyuiopasdfghjklzxcvbnm"
});
}
function now() {
return new Date().toISOString();
}
export function feedPath(token: string) {
return `static/feeds/${token}.xml`;
}
function feedUrl(token: string) {
return `https://www.kill-the-newsletter.com/feeds/${token}.xml`;
}
function feedEmail(token: string) {
return `${token}@kill-the-newsletter.com`;
}
function id(token: string) {
return `urn:kill-the-newsletter:${token}`;
}
function renderHtml(component: React.ReactElement): string {
return `\n${ReactDOMServer.renderToStaticMarkup(component)}`;
}
function renderXml(xml: object): string {
return new Builder().buildObject(xml);
}
