WeChat

This project is a real-time chat application built using Socket.IO, Express, and MongoDB with HTTPS support. It manages user connections and messages securely.

Features

• Real-Time Communication: Utilizes Socket.IO for real-time, bidirectional communication between clients and server.
• Secure Connections: HTTPS support with SSL certificates ensures secure data transmission.
• User Management: Connects to MongoDB to store and manage online users.
• Message Handling: Sends and receives messages between users in real-time.
• CORS Support: Configured to allow cross-origin requests from a specified domain.

How It Works

1. Server Initialization:

   • An Express app is initialized.
   • SSL certificates are read from the file system.
   • An HTTPS server is created using the SSL certificates and the Express app.

2. Socket.IO Setup:

   • Socket.IO is initialized with CORS settings and attached to the HTTPS server.

3. MongoDB Connection:

   • Connects to a MongoDB database to store user information.
   • Defines a schema and model for online users.

4. Event Handling:

   • Connection: When a new user connects, their socket ID is logged.
   • Add New User: Adds a new user to the MongoDB database if they don't already exist and emits the list of online users.
   • Disconnect: Removes the user from the MongoDB database when they disconnect and emits the updated list of online users.
   • Message: Sends a message to the specified recipient if they are online.

Getting Started

Prerequisites

• Node.js
• MongoDB
• SSL certificates

Installation

1. Clone the repository:

   git clone https://github.com/mohit-nagaraj/WeChat.git

2. Install dependencies:

   npm install

3. Configure MongoDB connection in the code if necessary. Add the env variables as you can see from .env.example and put the PORT, MONGO_URI, JWT_KEY values

4. Place your SSL certificates in the /ssl directory.

Running the Server

Start the server: Here both the socket server & the express server should be started, they run as 2 separate servers.

node index.js

The server will start listening on port specified with HTTPS.

License This project is licensed under the MIT License. See the LICENSE file for details.