94,959 questions
-3
votes
0
answers
28
views
Express.js: "Cannot set headers after they are sent to the client" error with MongoStore sessions - page renders correctly Error [ERR_HTTP_HEADERS_ERR [duplicate]
I'm getting the error Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client in my Express.js application using MongoDB session store, but the page displays correctly in ...
-2
votes
0
answers
73
views
JWT authentication: req.user is undefined in protected routes even though token is valid [closed]
I'm implementing JWT Authentication in a full-stack (React + Node.js + Express) application. Login works, token is generated correctly, and the client sends it in the Authorization header.
However, ...
-5
votes
0
answers
61
views
Download button not asking for location in Firefox (but in Chrome does) [closed]
I have following two files (server.js and index.html) which together should allow me to download a file using nodejs server (ran by node server.js). It does happen when I click the link but only in ...
- 3,236
1
vote
0
answers
30
views
Flutterwave Webhook Not Triggering in Production (Works on Development)
I am integrating Flutterwave payments in my project(Node.js/Express).
In development, deposits work correctly:
User pays;
Flutterwave triggers the webhook;
Payment gets verified and the user balance ...
- 11
3
votes
1
answer
101
views
Does creating multiple JWT authentication tokens mean multiple server sessions for concurrent requests?
I'm participating in an online Sudoku-solving challenge where you create an account, and the server gives you a JWT token. Every request (getting the board, submitting answers, etc.) must include that ...
- 55
1
vote
1
answer
100
views
How to disable "body-parser" globally in NestJS and use it on specific routes?
If I have understood correctly, the NestJS with default Express engine uses and enables the "body-parser" as default. If so, I am not fine with it because most requests has GET-type, and for ...
- 1,105
0
votes
1
answer
56
views
How can I add API common prefix for controllers
I want to add an API common prefix for all controllers, e.g. /api/v1. I am using inversify with the @inversify/http-express package.
Here is my current base server adapter setup:
class Server {
...
- 10
1
vote
0
answers
29
views
Bun + Express on Vercel: How to Modularize Routes from Separate Files?
I'm deploying a Bun + Express application to Vercel. Locally, my Express app works perfectly with routes defined in separate files and imported into index.ts. However, on Vercel, the deployment ...
- 143
0
votes
2
answers
82
views
I am having an issue with TypeScript and express-jwt
This is TypeScript code that I wrote a couple of years ago:
import { expressjwt } from "express-jwt";
import { Request } from 'express';
class Authentication {
static loginRequired() {
...
-1
votes
0
answers
44
views
Error after updating Express from version 4 to version 5 [closed]
I have an service built using Node.js and Express. I was able to start the service when using Express version 4.19.2, but after updating to version 5.1.0, I can no longer start it.
The error I’m ...
-4
votes
1
answer
38
views
express server ts compiller errors: library diff and declare global namespaces
When I work in development mode via nodemon, there are no problems. After that, I started preparing the code for production. At first, the "tsc" command worked without errors, and then I ...
- 662
Best practices
1
vote
3
replies
44
views
Athena health api documents
I’m trying to build an application that can download patient documents from Athenahealth, but I can’t figure out whether this is actually supported. The official API documentation is extremely limited ...
0
votes
1
answer
67
views
How to send cookies from server to client during SSR (Angular 20)
I am using HttpOnly Cookies for JWT authentication in my Angular v20 app. I have SSR enabled.
During Login, the cookies are sent to the client. I have an HttpInterceptor that seems to work to forward ...
- 109
Best practices
1
vote
3
replies
72
views
How can I optimize my nodejs backend code for live data emiting for dashboard in UI
So I am working on a MEAN stack project where in node I will emit the data to UI and in frontend I had some widgets ( as charts like gauge , line , pie and table ) where user can add dynamically ...
- 61
-4
votes
1
answer
110
views
Cant calling API from my server because of CORs [duplicate]
I am making a todo desktop app which run locally on user's device. I am using Electron Forge + Vite + ReactJs and ExpressJs.
Folder structure:
src/
├─ db/
│ └─ database.js
├─ main/
│ └─ index.js
├─ ...
- 21
-3
votes
0
answers
72
views
Role and permission management for RBAC Express.js +TypeScript project
I need to implement role-based access control on the backend with postgresql, Prisma, and Express.js+TypeScript and the roles I have in mind so far are admin, manager, customer, delivery crew. I want ...
-1
votes
0
answers
57
views
Argument of type 'PoolConnection' is not assignable to parameter of type 'never'
I want to mock transaction as PoolConnection
jest.mock('../../src/config/db.js', () => ({
__esModule: true,
default: {
execute: jest.fn(),
query: jest.fn(),
...
1
vote
2
answers
118
views
How to declare type for app.locals.something?
It's the same question as How do I extend the typings of Express.Application to give typings for app.locals but the suggested solution doesn't work for me.
I have server.ts :
const express = require('...
- 1,173
3
votes
1
answer
58
views
Query not printed as expected
exports.getAllProducts = async (req, res) => {
try {
console.log(req.query);
const queryObj = { ...req.query };
const excludedFilters = ["page", "limit", "...
- 53
2
votes
0
answers
86
views
Every day, the first and only the first backend call of my Node/Express app in production fails with ERR_CONNECTION_RESET or ERR_CONNECTION_REFUSED?
I have a basic MERN app in production with a login system that always runs into either an ERR_CONNECTION_RESET or an ERR_CONNECTION_REFUSED AxiosError when first attempting to login after what it ...
- 31
0
votes
0
answers
54
views
FIDO2 Fingerprint Verification Fails in Production (Works on Localhost) – Express.js + fido2-lib
Context
I’ve implemented FIDO2 verification for login and signup on my Express.js website. Everything works perfectly in localhost, but in production, the fingerprint verification of my security key ...
- 63
2
votes
1
answer
102
views
How to add data from a client-side input field to my array websites[name] and then display it in html document
How to add data from an input field in the browser to my array websites[name], and then display it in a html paragraph?
server.js
import express from "express"
import { websites } from "...
- 23
0
votes
2
answers
95
views
Running `nodemon server.js` opens `nodemon.js` file in text editor instead of executing
I installed nodemon globally and locally I added it to the environment path. I tried to use flags but nothing works
One month ago (last time I used it), it was running completely fine. Now it's ...
2
votes
1
answer
102
views
How can I make my Node.js backend code cleaner without using an ORM when working directly with SQL?
I'm building a Node.js backend using plain SQL (no ORM, just mysql2 wrapped in a small helper).
However, as my project grows, my route handlers start looking messy — full of raw SQL strings embedded ...
- 87
1
vote
0
answers
63
views
How to properly transform backend error responses using response-transformer or custom policy in Express Gateway?
I'm working with Express Gateway to proxy requests to a backend service and want to transform error responses into a common format like this:
const errorResponse = {
timestamp: new Date()....
- 19
1
vote
0
answers
61
views
Express' res.clearCookie() does not clear the cookie?
I assign the cookie here:
const sessionEnd = new Date(Date.now() + ( 1000 * 60 * 60 * 24 ));
const cookieOptions = {path: "/", expires: sessionEnd, httpOnly: false};
async function ...
- 31
0
votes
1
answer
58
views
Socket io is not connecting from Angular to backend nodejs
So I am trying to build a dynamic dashboard application ,so I use socket io 4.8.1 , and In frontend as well I installed the same version , now I used polling socket io it actually worked with polling ...
- 61
2
votes
0
answers
68
views
Multer returns req.file undefined when uploading image with Hoppscotch in Express
I'm building a Node.js + Express backend where users can upload profile pictures using Multer. When I send a POST request from Hoppscotch to /update_profile_picture, I get this error:
Cannot read ...
0
votes
0
answers
62
views
how to pass the uploaded assets URL directly to the front-end without using Presigned URL?
It's my first time using CDNs, and I went with Cloudflare R2 / S3 to upload and serve assets. I managed to upload an image to the path users/123456789/avatar-251011-103221008, this path is what I'm ...
- 198
-3
votes
1
answer
177
views
"Cannot set property query of #<IncomingMessage> which has only a getter" when using express-mongo-sanitize or xss-clean
I'm using Express 5, and I'm now running into this error when using express-mongo-sanitize or xss-clean:
TypeError: Cannot set property query of #<IncomingMessage> which has only a getter
In ...
0
votes
0
answers
52
views
Why is the return statement in my express.js route not stopping execution of the middleware that is placed after it?
The return statement in /routes/todos.js is not stopping the execution of my app. Instead, the the "Handle 404 Errors" app.use() function that is placed after app.use("/todos", ...
- 143
0
votes
0
answers
68
views
multer.memoryStorage() file undefined or Error: unexpected end of form
I'm trying to upload a file to the OpenAI API using Firebase Cloud Functions, Express and Multer. I have a React UI that I'm using to upload a file to my back end to then send to the OpenAI API, but I'...
0
votes
1
answer
46
views
VS Code Port Forwarding not setting cookies
I have a React application running on port 5173 and an Express server on port 3000. I'm trying to test Google OAuth sign-in from my React app using my actual mobile phone.
When I access the app from ...
- 1,195
0
votes
0
answers
33
views
EJS error: include is not a function when using <%- include('partials/sidebar', { user: user, page: 'invoice' }) %>
I'm working on an Express + EJS project and getting this error when rendering my invoice.ejs view:
TypeError: C:\Users\naray\OneDrive\Desktop\Invoice-saas\invoice-generator\views\invoice.ejs:17
>&...
- 1
1
vote
2
answers
107
views
Why won't my React app render a simple "Loading" text which is connected to a state?
My HomePage.jsx looks like this:
import {
Box,
Container,
SimpleGrid,
Text,
useColorModeValue,
VStack,
} from "@chakra-ui/react";
import { useEffect, useState } from "react&...
- 11
1
vote
0
answers
58
views
Augmentation merging
I'm running into a type augmentation conflict with Express when trying to enforce stricter types for req.user.
In one of my dependencies, Request is augmented like this:
declare module "express-...
- 23
0
votes
0
answers
58
views
MedusaJS cookies not set with SameSite=None for cross-subdomain admin panel (Nginx + VPS)
I'm self hosting a MedusaJS backend on a VPS, serving both a store (studyswags.pk) and an admin panel (admin.studyswags.pk) on separate subdomains.
I want authentication/session cookies to be ...
- 79
1
vote
2
answers
237
views
OpenAI API with Express/TypeScript throws Missing credentials after moving API key to .env
I’m building an app with NodeJs, Express and TypeScript.
At first, I hardcoded the OPENAI_API_KEY directly in my code for testing, and it worked fine.
Now, I’ve moved the key to a .env file because I ...
0
votes
0
answers
30
views
Adobe Express Script Not Selecting one Particular object in Function
I'm self-taught when it comes to the Adobe Scripts, so I don't know what's going on.
This is a shortened version of the function I'm working on; the full version will have different objects being ...
1
vote
1
answer
33
views
Merging custom user property into Express Request for keyGenerator
I’m trying to create a keyGenerator function for express-rate-limit that uses user.id as the key:
import rateLimit from 'express-rate-limit';
rateLimit({
limit: ...,
windowMs: ...,
message: ...,...
- 103
0
votes
3
answers
114
views
Issue in connecting with MongoDB
I'm having an issue connecting my server to a MongoDB database, I've added the code I used and the error I got below. I've consulted with ChatGPT, and it suggested an SRV DNS resolution issue, but ...
- 331
0
votes
0
answers
42
views
Sequelize bulkCreate fails with duplicate entry error despite non-duplicate data and updated unique constraints
i am trying to migrate the dataset in mysql database being the role_id and module_id same mysql is refusing to store saying
sqlMessage: "Duplicate entry '3-1' for key 'role_module_bridge....
1
vote
0
answers
121
views
Why does my API call in Next.js return undefined even though the Express backend works fine?
I’m building a small full-stack project using Next.js (frontend) and Express.js (backend) with a MySQL database.
The Express backend has this route:
// server.js
import express from "express&...
0
votes
0
answers
47
views
Getting Undefined in body while hitting post request through postman
import { DBCon } from "./db/index.js";
import express from "express";
const app = express();
app.use(express.json());
app.use(express.urlencoded({ extended: true }));
DBCon()
....
1
vote
1
answer
132
views
Nodejs backend endpoint not hitting consistently. Using nginx, ec2
I have a game where people can draw and guess, similar to scribble.io. I'm using Nginx for load balancing, hosted on AWS, with a backend written in Node.js.
The problem I'm encountering is that my ...
- 875
0
votes
1
answer
94
views
How to fix 404 error when deploying Node.js backend on Vercel with Vue frontend on Netlify?
I have split my Vue.js project into two parts:
The frontend is a Vue app, which I successfully deployed to Netlify, and it works fine.
The backend is a simple Node.js + Express server that I want to ...
0
votes
0
answers
54
views
How to avoid tsoa requiring a property that is internally set in subclass
I'm building a REST API using tsoa. I have a base class BaseProvenance and several subclasses like Entity, Agent, and Activity. Each subclass hard-codes a type property in its constructor that I ...
- 21
1
vote
1
answer
90
views
Unable to output successfully compiled react component into DOM
I've trying to integrate react into an existing project. I'm starting by setting up a simple button component to get started. The project is an express app that uses handlebarsjs to handle the views.
...
- 987
3
votes
3
answers
1k
views
How to use uuid with Node.js (v20) when require() throws ERR_REQUIRE_ESM?
I'm building a URL shortener app in Node.js (v20.16.0) using Express.
In my controller/user.js, I try to import uuid like this:
const { v4: uuidv4 } = require('uuid');
But when I run npm start, I get ...
- 41
0
votes
1
answer
221
views
Express 5 optional route parameters (:param?) throw PathError with path-to-regexp
I'm using Express 5.1.0 with Node.js v22.19.0, and I want to define a route where the parameter is optional, like /directory or /directory/someFolder.
Here's the code I tried:
import express from '...
- 23