0c8ee93d7f
This removes the `tcp` feature from hyper's `Cargo.toml`, and the code it enabled: - `HttpConnector` - `GaiResolver` - `AddrStream` And parts of `Client` and `Server` that used those types. Alternatives will be available in the `hyper-util` crate. Closes #2856 Co-authored-by: MrGunflame <mrgunflame@protonmail.com>
125 lines
4.8 KiB
Rust
125 lines
4.8 KiB
Rust
// #![deny(warnings)] // FIXME: https://github.com/rust-lang/rust/issues/62411
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#![warn(rust_2018_idioms)]
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use hyper::server::conn::Http;
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use hyper::service::service_fn;
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use hyper::{Body, Method, Request, Response, StatusCode};
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use tokio::net::TcpListener;
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use std::collections::HashMap;
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use std::net::SocketAddr;
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use url::form_urlencoded;
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static INDEX: &[u8] = b"<html><body><form action=\"post\" method=\"post\">Name: <input type=\"text\" name=\"name\"><br>Number: <input type=\"text\" name=\"number\"><br><input type=\"submit\"></body></html>";
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static MISSING: &[u8] = b"Missing field";
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static NOTNUMERIC: &[u8] = b"Number field is not numeric";
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// Using service_fn, we can turn this function into a `Service`.
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async fn param_example(req: Request<Body>) -> Result<Response<Body>, hyper::Error> {
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match (req.method(), req.uri().path()) {
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(&Method::GET, "/") | (&Method::GET, "/post") => Ok(Response::new(INDEX.into())),
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(&Method::POST, "/post") => {
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// Concatenate the body...
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let b = hyper::body::to_bytes(req).await?;
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// Parse the request body. form_urlencoded::parse
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// always succeeds, but in general parsing may
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// fail (for example, an invalid post of json), so
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// returning early with BadRequest may be
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// necessary.
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//
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// Warning: this is a simplified use case. In
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// principle names can appear multiple times in a
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// form, and the values should be rolled up into a
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// HashMap<String, Vec<String>>. However in this
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// example the simpler approach is sufficient.
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let params = form_urlencoded::parse(b.as_ref())
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.into_owned()
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.collect::<HashMap<String, String>>();
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// Validate the request parameters, returning
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// early if an invalid input is detected.
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let name = if let Some(n) = params.get("name") {
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n
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} else {
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return Ok(Response::builder()
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.status(StatusCode::UNPROCESSABLE_ENTITY)
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.body(MISSING.into())
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.unwrap());
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};
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let number = if let Some(n) = params.get("number") {
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if let Ok(v) = n.parse::<f64>() {
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v
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} else {
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return Ok(Response::builder()
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.status(StatusCode::UNPROCESSABLE_ENTITY)
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.body(NOTNUMERIC.into())
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.unwrap());
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}
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} else {
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return Ok(Response::builder()
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.status(StatusCode::UNPROCESSABLE_ENTITY)
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.body(MISSING.into())
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.unwrap());
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};
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// Render the response. This will often involve
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// calls to a database or web service, which will
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// require creating a new stream for the response
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// body. Since those may fail, other error
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// responses such as InternalServiceError may be
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// needed here, too.
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let body = format!("Hello {}, your number is {}", name, number);
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Ok(Response::new(body.into()))
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}
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(&Method::GET, "/get") => {
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let query = if let Some(q) = req.uri().query() {
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q
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} else {
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return Ok(Response::builder()
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.status(StatusCode::UNPROCESSABLE_ENTITY)
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.body(MISSING.into())
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.unwrap());
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};
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let params = form_urlencoded::parse(query.as_bytes())
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.into_owned()
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.collect::<HashMap<String, String>>();
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let page = if let Some(p) = params.get("page") {
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p
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} else {
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return Ok(Response::builder()
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.status(StatusCode::UNPROCESSABLE_ENTITY)
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.body(MISSING.into())
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.unwrap());
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};
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let body = format!("You requested {}", page);
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Ok(Response::new(body.into()))
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}
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_ => Ok(Response::builder()
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.status(StatusCode::NOT_FOUND)
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.body(Body::empty())
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.unwrap()),
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}
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}
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#[tokio::main]
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async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
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pretty_env_logger::init();
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let addr: SocketAddr = ([127, 0, 0, 1], 1337).into();
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let listener = TcpListener::bind(addr).await?;
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println!("Listening on http://{}", addr);
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loop {
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let (stream, _) = listener.accept().await?;
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tokio::task::spawn(async move {
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if let Err(err) = Http::new()
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.serve_connection(stream, service_fn(param_example))
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.await
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{
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println!("Error serving connection: {:?}", err);
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}
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});
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}
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}
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