80 lines
2.2 KiB
Rust
80 lines
2.2 KiB
Rust
#![deny(warnings)]
|
|
|
|
use tokio::io::AsyncReadExt;
|
|
use tokio::fs::File;
|
|
|
|
use hyper::{Body, Method, Result, Request, Response, Server, StatusCode};
|
|
use hyper::service::{make_service_fn, service_fn};
|
|
|
|
static INDEX: &str = "examples/send_file_index.html";
|
|
static INTERNAL_SERVER_ERROR: &[u8] = b"Internal Server Error";
|
|
static NOTFOUND: &[u8] = b"Not Found";
|
|
|
|
#[tokio::main]
|
|
async fn main() {
|
|
pretty_env_logger::init();
|
|
|
|
let addr = "127.0.0.1:1337".parse().unwrap();
|
|
|
|
let make_service = make_service_fn(|_| async {
|
|
Ok::<_, hyper::Error>(service_fn(response_examples))
|
|
});
|
|
|
|
let server = Server::bind(&addr)
|
|
.serve(make_service);
|
|
|
|
println!("Listening on http://{}", addr);
|
|
|
|
if let Err(e) = server.await {
|
|
eprintln!("server error: {}", e);
|
|
}
|
|
}
|
|
|
|
async fn response_examples(req: Request<Body>) -> Result<Response<Body>> {
|
|
match (req.method(), req.uri().path()) {
|
|
(&Method::GET, "/") |
|
|
(&Method::GET, "/index.html") |
|
|
(&Method::GET, "/big_file.html") => {
|
|
simple_file_send(INDEX).await
|
|
}
|
|
(&Method::GET, "/no_file.html") => {
|
|
// Test what happens when file cannot be be found
|
|
simple_file_send("this_file_should_not_exist.html").await
|
|
}
|
|
_ => Ok(not_found())
|
|
}
|
|
}
|
|
|
|
/// HTTP status code 404
|
|
fn not_found() -> Response<Body> {
|
|
Response::builder()
|
|
.status(StatusCode::NOT_FOUND)
|
|
.body(NOTFOUND.into())
|
|
.unwrap()
|
|
}
|
|
|
|
/// HTTP status code 500
|
|
fn internal_server_error() -> Response<Body> {
|
|
Response::builder()
|
|
.status(StatusCode::INTERNAL_SERVER_ERROR)
|
|
.body(INTERNAL_SERVER_ERROR.into())
|
|
.unwrap()
|
|
}
|
|
|
|
async fn simple_file_send(filename: &str) -> Result<Response<Body>> {
|
|
// Serve a file by asynchronously reading it entirely into memory.
|
|
// Uses tokio_fs to open file asynchronously, then tokio::io::AsyncReadExt
|
|
// to read into memory asynchronously.
|
|
|
|
if let Ok(mut file) = File::open(filename).await {
|
|
let mut buf = Vec::new();
|
|
if let Ok(_) = file.read_to_end(&mut buf).await {
|
|
return Ok(Response::new(buf.into()));
|
|
}
|
|
|
|
return Ok(internal_server_error());
|
|
}
|
|
|
|
return Ok(not_found());
|
|
}
|