Repository link: https://github.com/ProgrammerPratik/HTTP-server-implementation

Overview:

This project is a simple yet robust HTTP server using Java to handle basic HTTP requests and serve predefined routes. The server supports multithreading, allowing it to handle multiple client connections simultaneously. It's an excellent project for understanding the basics of HTTP, server programming, and multithreading in Java.

features:

• Multithreaded Handling: Supports simultaneous client connections.
• Default Routes:
  • /: A welcoming page with the current date and time.
  • /time: Returns the current time in JSON format.
  • /health: Reports the server's health status.
  • /stats: Displays basic server statistics like active threads and available memory.
• Customizable Routes: Easily add new routes with specific handlers.
• HTML and JSON Responses: Supports serving both HTML and JSON responses.
• Error Handling: Handles invalid routes with a 404 Not Found response.

Requirements:

1. Java Development Kit (JDK): Version 8 or higher.
2. terminal or CLI interface

Usage:

1. Clone the Repository

git clone https://github.com/ProgrammerPratik/HTTP-server-implementation.git
cd SimpleHttpServer

2. Compile and run the Server

javac SimpleHttpServer.java
java SimpleHttpServer

3. Accessing the Server through your browser

just visit: http://localhost:8080/ OR http://127.0.0.1:8080/ for locally accessing the server you ran (by default the server will run on port 8080)

You can also check the data sent by the user on the server side. This includes the headers and other details from the HTTP request such as User-Agent, Accept, and more as shown below:

How to add new Routes:

The server provides a simple interface to add custom routes. Here’s an example:

server.addRoute("/hello", (request) -> 
{
    return new HttpResponse(200, "<h1>Hello, World!</h1>");
}

After adding this code, the route "/hello" will serve a basic HTML response.

Sample Curl outputs:

Request: curl http://localhost:8080/time

Response:

{"time": "2024-11-19T19:15:45.9178453"}

Request: curl http://localhost:8080/health

Response:

{"status": "healthy", "uptime": "1732023983004"}

I also wrote an article on how you can implement simpler HTTP server using Java which explains how basics work incase you are curious.

Article link: https://programmerpratik.github.io/articles/http-using-java.html