URL shortener - utils.ts & constants.ts

constants.ts

export const PORT=80;
export const ROUTE_SHORTEN='/shorten';
export const HTTP_METHOD_GET='GET';
export const HTTP_METHOD_POST='POST';
export const HEADER_LOCATION='location';
export const QUERY_PARAM_TARGET='target';
export const URL_CODE_LENGTH=8;
export const SERVICE_DOMAIN='http://sho.rt/';

utils.ts

import {Status} from "https://deno.land/std/http/http_status.ts";
import {HEADER_LOCATION, URL_CODE_LENGTH, SERVICE_DOMAIN} from "./constants.ts";

export function sendResponseCode(resp:any, code:number) {
    resp(new Response(undefined, {status: code}));
}

export function sendResponseShortenedUrl(resp:any, shortCode:string) {
    resp(new Response(JSON.stringify({shortUrl: SERVICE_DOMAIN+shortCode}), 
                     {status: Status.OK,
                      headers: {[HEADER_CONTENT_TYPE]: 'application/json'}
                    }));
}

export async function sendResponseRedirect(resp:any, target:string) {
        await resp(new Response(undefined, {
            status: Status.Found,
            headers: new Headers({[HEADER_LOCATION]: target})
    }));
}  

export function getId() {
    var arr = new Uint8Array(URL_CODE_LENGTH/2)
    crypto.getRandomValues(arr);
    const toHex=(d:any)=>d.toString(16).padStart(2, "0");
    return Array.from(arr, toHex).join('')
  }