You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: web_api.rs
    path of file: ./repos/hyper/examples
    
    the code of the file until where you have to start completion: #![deny(warnings)]

use std::net::SocketAddr;

use bytes::{Buf, Bytes};
use http_body_util::{BodyExt, Full};
use hyper::server::conn::http1;
use hyper::service::service_fn;
use hyper::{body::Incoming as IncomingBody, header, Method, Request, Response, StatusCode};
use tokio::net::{TcpListener, TcpS
    
async fn response_examples(req: Request<IncomingBody>) -> Result<Response<BoxBody>> {
    match (req.method(), req.uri().path()) {
        (&Method::GET, "/") | (&Method::GET, "/index.html") => Ok(Response::new(full(INDEX))),
        (&Method::GET, "/test.html") => client_request_response().await,
        (&Method::POST, "/json_api") => api_post_response(req).await,
        (&Method::GET, "/json_api") => api_get_response().await,
        _ => {
            // Return 404 not found response.
            Ok(Response::builder()
                .status(StatusCode::NOT_FOUND)
                .body(full(NOTFOUND))
                .unwrap())
        }
    }
}