Simple Proof of Concept Application for Subdomains

This is a basic Express.js application designed as a proof of concept for handling subdomains. The application listens on port 3000 and responds to requests with a JSON object containing the host information and a test message.

How It Works

The application is built using the Express.js framework. When a GET request is made to the root route (/), the server responds with a JSON object that includes the host header from the request and a message.

Example Response

When you access the root route (e.g., http://localhost:3000/), the server will respond with:

{
    "host": "localhost:3000",
    "message": "testing api"
}

Subdomain Handling

This application can be extended to handle different subdomains. When a request is made to a specific subdomain, the host value in the JSON response will reflect the subdomain.

For example, if the application is hosted on a domain with a subdomain (e.g., api.example.com), the response would look like:

{
    "host": "api.example.com",
    "message": "testing api"
}

Getting Started

Prerequisites

• Node.js installed on your machine.

Installation

1. Clone this repository or copy the code provided.

2. Navigate to the project directory.

3. Install the necessary dependencies by running:

   npm install express

4. Start the server by running:

   node index.js

5. The server will be running on http://localhost:3000/.

Testing Subdomains

To test subdomains locally, you can modify your /etc/hosts file (on Linux/Mac) or C:\Windows\System32\drivers\etc\hosts file (on Windows) to map subdomains to localhost. For example, you can add the following line:

127.0.0.1   api.localhost

Now, you can access the application via http://api.localhost:3000/, and the response will show "host": "api.localhost:3000".