Version 0.1.1 of maker_web introduces TCP-level connection filtering, giving you more control over which clients can reach your HTTP server.

Main feature: ConnectionFilter trait

The new ConnectionFilter trait allows you to intercept connections before any HTTP parsing begins. This is useful for:

• Early IP filtering/whitelisting
• Implementing custom rate limiting at the TCP layer
• Rejecting unwanted traffic with minimal overhead

Examples

Here's how you can implement a simple IP-based filter:

use std::net::{IpAddr, SocketAddr};
use maker_web::{Server, Handler, ConnectionFilter, Request, Response, Handled, StatusCode};
use tokio::net::TcpListener;

struct MyConnFilter {
    blacklist: Vec<IpAddr>
}

impl ConnectionFilter for MyConnFilter {
    fn filter(
        &self, client_addr: SocketAddr, _: SocketAddr, err_resp: &mut Response
    ) -> Result<(), Handled> {
        if self.blacklist.contains(&client_addr.ip()) {
            // Reject with custom response
            Err(err_resp
                .status(StatusCode::Forbidden)
                .body("Your IP is permanently banned"))
        } else {
            Ok(()) // Accept connection
        }
    }
}

struct HelloWorld;

impl Handler for HelloWorld {
    async fn handle(&self, _: &mut (), _: &Request, resp: &mut Response) -> Handled {
        resp.status(StatusCode::Ok)
            .header("Content-Type", "text/plain")
            .body("Hello, world!")
    }
}

#[tokio::main]
async fn main() {
    let filter = MyConnFilter {
	    blacklist: vec![
	        "192.0.2.1".parse().unwrap(),
	        "198.51.100.1".parse().unwrap(),
	        "203.0.113.1".parse().unwrap(),
	        "10.0.0.1".parse().unwrap(),
	    ]
	};

	Server::builder()
	    .listener(TcpListener::bind("127.0.0.1:8080").await.unwrap())
	    .handler(HelloWorld)
	    .conn_filter(filter)
        .build()
        .launch()
        .await;
} 

Links

• Crate: crates.io: Rust Package Registry
• Docs: maker_web - Rust
• GitHub: GitHub - AmakeSashaDev/maker_web: High-performance, zero-allocation HTTP server for microservices

Your opinion

1. What's your opinion about this ConnectionFilter feature?
2. How convenient is this feature's API to use?
3. What's your general impression of maker_web's API design?

I'd like to hear your thoughts on this addition. Your opinion is very important to me.

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