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