WebServ is a fully functional HTTP server written in C++98 from scratch. Unlike standard web servers (Apache/Nginx), this project does not use any external network libraries. It interacts directly with the OS kernel using Sockets and Multiplexing.

The goal was to build a robust server capable of handling multiple concurrent connections simultaneously without blocking, using a single thread. It strictly follows the RFC 7230 protocol standards.

The server operates on an Event-Driven Architecture:

1. Socket Creation: Sets up a listening socket on the specified port.
2. Non-Blocking Mode: All file descriptors (FDs) are set to non-blocking.
3. The Loop:
   • Monitor: epoll waits for events (Read/Write) on FDs.
   • Accept: If the Listener has an event, accept new client.
   • Read: If a Client FD is readable, parse the raw HTTP request.
   • Process: Route the request (Static file or CGI).
   • Write: If Client FD is writable, send the built HTTP response.

// Simplified Event Loop Logic
while (server_is_running) {
    int events = epoll_wait(epoll_fd, event_list, MAX_EVENTS, -1);
    for (int i = 0; i < events; i++) {
        if (event_list[i].data.fd == server_socket)
            handle_new_connection();
        else if (event_list[i].events & EPOLLIN)
            handle_request(event_list[i].data.fd);
        else if (event_list[i].events & EPOLLOUT)
            send_response(event_list[i].data.fd);
    }
}

🚀 Installation & Usage Prerequisites C++ Compiler (clang++ / g++)

Make

Building

git clone https://github.com/70rn4d0/WebServer.git
cd WebServer_http
make

Running

# Run with default config
./webserv first.conf

Testing (with Siege) To test concurrency and availability:

siege -b -c 100 -t 30S [http://127.0.0.1:8080/](http://127.0.0.1:8080/)