create a http server with a patch route in rust

To create an HTTP server with a PATCH route in Rust, you can use the hyper crate, which is a fast and low-level HTTP library. Here is an example:


main.rs
use hyper::{Body, Method, Request, Response, Server, StatusCode};
use hyper::header::{CONTENT_TYPE, HeaderValue};
use hyper::rt::Future;
use hyper::service::service_fn_ok;

fn main() {
    // Create a new HTTP server
    let addr = ([127, 0, 0, 1], 3000).into();
    let server = Server::bind(&addr)
        .serve(|| service_fn_ok(handle_request))
        .map_err(|e| eprintln!("server error: {}", e));
    println!("Listening on http://{}", addr);

    // Run the server on the main thread
    hyper::rt::run(server);
}

fn handle_request(req: Request<Body>) -> Response<Body> {
    match (req.method(), req.uri().path()) {
        (&Method::PATCH, "/data") => {
            // TODO: handle the PATCH request
            let res = Response::builder()
                .status(StatusCode::OK)
                .header(CONTENT_TYPE, HeaderValue::from_static("text/plain"))
                .body("PATCH request received".into())
                .unwrap();
            res
        },
        _ => {
            // Return a 404 Not Found response for all other requests
            let res = Response::builder()
                .status(StatusCode::NOT_FOUND)
                .body("404 Not Found".into())
                .unwrap();
            res
        }
    }
}
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In this example, we define a server that listens on http://localhost:3000. When a request is received, the handle_request function is called, which checks if the request method is PATCH and the path is /data. If so, it returns a 200 OK response with a plain text message, indicating that the PATCH request was received. Otherwise, it returns a 404 Not Found response.

You can customize the TODO section of the handle_request function to handle the PATCH request and update the necessary data.

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