Express Handlers

Utility Middlewares for working with ExpressJs

A simple middleware package for Express applications.

Handlers

• Async Handler
• CORS Handler
• Error Handler
• Log Handler
• Not Found Handler
• Hash Handler
• Password Handler

Installation

You can install exhandlers using npm:

npm install exhandlers

Usage

Contents of your entry point file would look like this

const express = require("express");
const {
  asyncHandler,
  errorHandler,
  logHandler,
  notFoundHandler,
  corsHandler,
  passwordHandler,
  hashHandler,
} = require("exhandlers");
const User = require("path/to/userModel");

const app = express();

// Use CORS handler
app.use(corsHandler());

// Use logging middleware
app.use(logHandler);

// Define routes with asyncHandler
app.get(
  "/api/data",
  asyncHandler(async (req, res) => {
    const data = await fetchData(); // Replace with your async logic
    res.json(data);
  }),
);

// Use hashHandler to hash password
app.post(
  "/api/auth/register",
  asyncHandler(async (req, res) => {
    const { password } = req.body;

    const hashedPassword = await hashHandler(password);
  }),
);

// Use passwordHandler to compare passwords
app.post(
  "/api/auth/login",
  asyncHandler(async (req, res) => {
    const { email, password } = req.body;

    const user = await User.findOne({ email });

    const hashedPassword = user.password;

    const passwordMatch = await passwordHandler(password, hashedPassword);

    if (!passwordMatch) {
      throw new Error("Invalid credentials");
    }
  }),
);

// Use Not Found handler for undefined routes
app.use(notFoundHandler);

// Use error handler at the end of the middleware stack
app.use(errorHandler);

const PORT = process.env.PORT || 3000;
app.listen(PORT, () => {
  console.log(`Server running on port ${PORT}`);
});

ALLOWED_ORIGINS="http://localhost:5000, http://localhost:8000"

for corsHandler

Documentation

Read more

License

This project is licensed under the MIT License.