create a http server and parse authorization headers in rust

To create an HTTP server in Rust, we can use the hyper crate which provides a robust library for building HTTP clients and servers.

Here is an example of how to create an HTTP server and parse authorization headers in Rust:


main.rs
use hyper::{Body, Request, Response, Server};
use std::net::SocketAddr;

async fn handle_request(req: Request<Body>) -> Result<Response<Body>, hyper::Error> {
    // Get the authorization header from the request
    let auth_header = req.headers()
        .get("Authorization")
        .and_then(|h| h.to_str().ok())
        .unwrap_or("");

    // Process the authorization header here...

    // Construct the response
    let response = Response::new(Body::from("Hello, Rust!"));

    Ok(response)
}

#[tokio::main]
async fn main() {
    // Define the socket address to listen on
    let addr = SocketAddr::from(([127, 0, 0, 1], 3000));

    // Create a new HTTP server
    let server = Server::bind(&addr).serve(|| {
        // Return the request handler
        async {
            Ok::<_, hyper::Error>(handle_request)
        }
    });

    println!("Listening on http://{}", addr);

    // Start the server
    if let Err(e) = server.await {
        eprintln!("server error: {}", e);
    }
}
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In this example, we define a request handler (handle_request) which extracts the authorization header from the request and processes it as needed. We then create an instance of hyper::Server and bind it to a socket address, passing in the request handler as a closure.

When the server is started, it will listen for incoming HTTP requests on the specified socket address. When a request is received, the handle_request function is called with the request as an argument. The function then extracts the authorization header from the request, processes it, and constructs a response object, which is returned to the client.

Note that we use the tokio runtime to create an asynchronous server. The main function is marked as async, and we use the tokio::main macro to start the runtime and run the server.

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