server.js

import fs from "fs";
import { exec } from "child_process";
import fetch from "node-fetch";
import { createServer } from "http";

var csldat, slcdat;

exec("pip install -r requirements.txt");

var updCDat = async () => {
  //every hour update countries.json
  //var data=await (await fetch("https://api.covid19api.com/countries")).json();
  var data = (
    await (
      await fetch(
        "https://covid-api.com/api/regions?per_page=1002&order=name&sort=asc"
      )
    ).json()
  )["data"];
  csldat = JSON.stringify(
    Object.fromEntries(data.map((e) => [e["name"], e["iso"]]))
  );
  fs.writeFileSync("countriesSlug.json", csldat);
};
setInterval(updCDat, 3600000);
updCDat().then(() => {
  createServer((req, res) => {
    var mimeType = "image/png";
    if (req.url.endsWith(".css")) {
      mimeType = "text/css";
    } else if (["", "/"].includes(req.url) || req.url.endsWith(".html")) {
      mimeType = "text/html";
    }
    res.writeHead(200, { "Content-Type": mimeType });
    if (["", "/"].includes(req.url)) {
      res.write(
        fs
          .readFileSync("public/index.html", "utf8")
          .replace(
            "***countries***",
            fs.readFileSync("countriesSlug.json", "utf8")
          )
      );
    } else if (req.url.startsWith("/c/")) {
      if (!fs.existsSync("/tmp/c")) fs.mkdirSync("/tmp/c");
      var execProcess = exec(
        'python3 server.py "' +
          req.url
            .substr(3)
            .toLowerCase()
            .replace(/%20/g, " ")
            .replace(/\"/g, "") +
          '"'
      );
      execProcess.stdout.pipe(process.stdout);
      execProcess.stderr.pipe(process.stderr);
      execProcess.on("exit", function () {
        var img = "/tmp" + req.url.toLowerCase().replace(/%20/g, " ") + ".png";
        if (fs.existsSync(img)) res.write(fs.readFileSync(img));
        res.end();
      });
      return;
    } else {
      if (fs.existsSync("public" + req.url))
        res.write(fs.readFileSync("public" + req.url, "utf8"));
    }
    res.end();
  }).listen(process.env.PORT || 8080);
});