Back APIs Route never visited - URL Shortener Microservice

Tell us what’s happening:

one of my route is never visited if i run the tests:

app.get("/api/shorturl/:id", async (req, res) => {
  let id =
  console.log(`42: id = ${id}`);
  let url = await urlModel.findOne({ short_url: id })
  console.log(`44: id = ${id} = url.original_url = ${url.original_url}`);
  res.json(url); // JSON response with original_url and short_url

Your project link(s)

solution: boilerplate-project-urlshortener - Replit

Challenge: Back End Development and APIs Projects - URL Shortener Microservice

Link to the challenge:

I’m surprised that I don’t seem to get a valid ID from the tests (for days).
Is it possible that the test is not working properly at the moment?

from my index.js

app.get("/api/shorturl/:id", async (req, res) => {
/‾‾‾ req.params ‾‾‾‾‾‾‾‾‾ 155 
{ id: 'undefined' }
\___ req.params _________ 157 

Challenge: Back End Development and APIs Projects - URL Shortener Microservice

Link to the challenge:

Now the title doesn’t fit anymore (‘Route never visited’).
Is it possible to rename this?

problem now seems is the value of req.params
gets a key (id) with empty value in this route

i have deleted most in my index.js in last minutes (if route not woks i not need anything else. therfore i delete everything first and try find the route with sended data first)
but created a backup to index backup.js

you find it in line 29
in index.js

app.get("/api/shorturl/:id", async (req, res) => {

in my backup is ( and was )


app.get("/api/shorturl/:id", async (req, res) => {

in the new i get now data.
but not from the index(backup).js file.
but route is same. strange for me. hmmm

/‾‾‾ req.params ‾‾‾‾‾‾‾‾‾ 34 
{ id: '3' }

That means something must have interfered with the proper execution (in the index I’ve been using till today, around 7pm Europe time).

the index that i have used the last 2 days with the same rout gets my
a empty object with same source (at this route).

but in my last index there was/is much stuff into . about 400 lines of code. some side-effect maybe. or i dont know. i need find out or need to programing it completely fresh (maybe not bad idea)

index old (last 2 day or so get my no data) near line 150:

app.get("/api/shorturl/:id", async (req, res) => {
  let id =;

index new (today evening) near line 20 that gives me data:"/api/shorturl/id", async (req, res) => {
  let id =;

look pretty same.

from my index.js

app.get("/api/shorturl/:id", async (req, res) => {

but results different:

/‾‾‾ req.params ‾‾‾‾‾‾‾‾‾ line 155 
{ id: 'undefined' }
\___ req.params _________ 

but results different:

/‾‾‾ req.params ‾‾‾‾‾‾‾‾‾ line 34 
{ id: 3 }
\___ req.params _________ 

that was the moment i created many routes to try to get some data from somewhere :smiley:

Btw there was strange behavior today. website was reloading very often. and was not easy to edit (this maybe happens using large files). BTW i closed some clipboard apps at my Desktop like AutoKey-App. Seems helps a bit.

nut sure if it the best place here.

the result was fetched in line 35 (req.param)

i got a get result, that looks like it was sendet to my scritpt to my script to itself:

npm run start
> shorturl@0.0.3 start
> node index.js
Listening on port 3000  
/‾‾‾ req.params object‾‾‾‾‾‾‾‾‾ 35 
{ id: 'dummy' }
\___ req.params _________ 35 
not falid .... EndOf 79 
 not valid = .... 26 

Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client
    at new NodeError (node:internal/errors:393:5)
    at ServerResponse.setHeader (node:_http_outgoing:644:11)
    at ServerResponse.header (/home/runner/boilerplate-project-urlshortener/node_modules/express/lib/response.js:794:10)
    at ServerResponse.send (/home/runner/boilerplate-project-urlshortener/node_modules/express/lib/response.js:174:12)
    at ServerResponse.json (/home/runner/boilerplate-project-urlshortener/node_modules/express/lib/response.js:278:15)
    at /home/runner/boilerplate-project-urlshortener/index.js:31:9
    at Layer.handle [as handle_request] (/home/runner/boilerplate-project-urlshortener/node_modules/express/lib/router/layer.js:95:5)
    at next (/home/runner/boilerplate-project-urlshortener/node_modules/express/lib/router/route.js:144:13)
    at Route.dispatch (/home/runner/boilerplate-project-urlshortener/node_modules/express/lib/router/route.js:114:3)
    at Layer.handle [as handle_request] (/home/runner/boilerplate-project-urlshortener/node_modules/express/lib/router/layer.js:95:5)

the index.js

const express = require('express');
const cors = require('cors');
const app = express();
const dns = require('dns');
const port = process.env.PORT || 3000;

app.use(express.urlencoded({ extended: true })); // Needet for url-encoded parameters parameters. if not used, req.body will be undefined. place it before any other middleware or route handlers.

app.use('/public', express.static(`${process.cwd()}/public`));
app.get('/', function(req, res) {
  res.sendFile(process.cwd() + '/views/index.html');
});'/api/shorturl', function(req, res) {
  let original_url;
  try {
    // const { url } = req.body; // in the html form name="url" in the in put field
    original_url = req.body.url; // works. is renaming the url
    consoleLogP(original_url, `/api/shorturl original_url`, lNr());
  } catch (error){ 
     consoleLogP(req.body, 'req.body', lNr());
    consoleLogP(original_url, 'not valid', lNr());  
    res.json({ error: 'invalid url' });

    const JSONresponse = { original_url: 'dummy', short_url: 'dummy' };

app.get("/api/shorturl/:id", async (req, res) => {
  consoleLogP(req.params, 'req.params', lNr());

that was sendet to myself. confused.
by using 
res.json({ original_url: 'dummy', short_url: 'dummy' }):

/‾‾‾ req.params object‾‾‾‾‾‾‾‾‾ 35 
{ id: 'dummy' }
\___ req.params _________ 35 

app.listen(port, function() {
  console.log(`Listening on port ${port} ${lNr()}`);


in (as is possible to see also above):'/api/shorturl', function(req, res) {

the result was:

{ id: 'dummy' }

that confused me (pretty sure that this are not the data that will be sended by the test. confused me also more because my line 30 looks like so:

const JSONresponse = { original_url: 'dummy', short_url: 'dummy' };

BTW sorry for my English i not a native speaker.

i not test myself. i mean the tests from

I didn’t know that data from myself might come to my script from another source (apart from my index.html or so).

now it has changed over the night without me doing anything. when I call up the page by clicking on test (first button in the task page),

  1. another message comes up (in the task page)
    Your echo server should repeat words correctly
  2. and the console remains unchanged:

sounds like reported last year in January here: Basic Node and Express - Get Route Parameter Input from the Client - Solution Not Working

Do you have any advice on how I might fix this? At the moment it only sends this message.

it still the same (as from top of this postings) replit boilerplate-project-urlshortener - Replit
The challenge is to short urls and get the short urls back if it will be asked for.

But now… Whey this error is now not there anymore?
i checked it seconds before i pressed the send button… only to be sure.
=> This error not exist anymore. This is strange. :slight_smile: fingerscrossed. I’m feeling a bit like in the movie “Groundhog Day” right now
There seems to be a big time lag. Updates come into effect very late.

I’ve been busy with this task for the past 15 days. Why should I be wrong all of a sudden?

Your remember? we said program everything fresh. i did. its still the same task

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