#![warn(rust_2018_idioms)]
use bytes::Bytes;
use http_body_util::{combinators::BoxBody, BodyExt, Empty, Full};
use hyper::server::conn::http1;
use hyper::service::service_fn;
use hyper::{Method, Request, Response, StatusCode};
use tokio::net::TcpListener;
use std::collections::HashMap;
use std::convert::Infallible;
use std::net::SocketAddr;
#[path = "../benches/support/mod.rs"]
mod support;
use support::TokioIo;
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>";
static MISSING: &[u8] = b"Missing field";
static NOTNUMERIC: &[u8] = b"Number field is not numeric";
async fn param_example(
req: Request<hyper::body::Incoming>,
) -> Result<Response<BoxBody<Bytes, Infallible>>, hyper::Error> {
match (req.method(), req.uri().path()) {
(&Method::GET, "/") | (&Method::GET, "/post") => Ok(Response::new(full(INDEX))),
(&Method::POST, "/post") => {
let b = req.collect().await?.to_bytes();
let params = form_urlencoded::parse(b.as_ref())
.into_owned()
.collect::<HashMap<String, String>>();
let name = if let Some(n) = params.get("name") {
n
} else {
return Ok(Response::builder()
.status(StatusCode::UNPROCESSABLE_ENTITY)
.body(full(MISSING))
.unwrap());
};
let number = if let Some(n) = params.get("number") {
if let Ok(v) = n.parse::<f64>() {
v
} else {
return Ok(Response::builder()
.status(StatusCode::UNPROCESSABLE_ENTITY)
.body(full(NOTNUMERIC))
.unwrap());
}
} else {
return Ok(Response::builder()
.status(StatusCode::UNPROCESSABLE_ENTITY)
.body(full(MISSING))
.unwrap());
};
let body = format!("Hello {}, your number is {}", name, number);
Ok(Response::new(full(body)))
}
(&Method::GET, "/get") => {
let query = if let Some(q) = req.uri().query() {
q
} else {
return Ok(Response::builder()
.status(StatusCode::UNPROCESSABLE_ENTITY)
.body(full(MISSING))
.unwrap());
};
let params = form_urlencoded::parse(query.as_bytes())
.into_owned()
.collect::<HashMap<String, String>>();
let page = if let Some(p) = params.get("page") {
p
} else {
return Ok(Response::builder()
.status(StatusCode::UNPROCESSABLE_ENTITY)
.body(full(MISSING))
.unwrap());
};
let body = format!("You requested {}", page);
Ok(Response::new(full(body)))
}
_ => Ok(Response::builder()
.status(StatusCode::NOT_FOUND)
.body(empty())
.unwrap()),
}
}
fn empty() -> BoxBody<Bytes, Infallible> {
Empty::<Bytes>::new().boxed()
}
fn full<T: Into<Bytes>>(chunk: T) -> BoxBody<Bytes, Infallible> {
Full::new(chunk.into()).boxed()
}
#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
pretty_env_logger::init();
let addr: SocketAddr = ([127, 0, 0, 1], 1337).into();
let listener = TcpListener::bind(addr).await?;
println!("Listening on http://{}", addr);
loop {
let (stream, _) = listener.accept().await?;
let io = TokioIo::new(stream);
tokio::task::spawn(async move {
if let Err(err) = http1::Builder::new()
.serve_connection(io, service_fn(param_example))
.await
{
println!("Error serving connection: {:?}", err);
}
});
}
}