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use std::convert::Infallible;
use hyper::service::{service_fn, make_service_fn};
use hyper::{Method, Server, StatusCode, Body};
use hyper::http::request::Parts;
use hyper::http::response::Builder;
use serde::Deserialize;
use sputnik::{mime, request::{SputnikParts, SputnikBody}, response::SputnikBuilder};
use sputnik::request::CsrfProtectedFormError;
type Response = hyper::Response<Body>;
#[derive(thiserror::Error, Debug)]
enum Error {
#[error("page not found")]
NotFound(String),
#[error("{0}")]
CsrfError(#[from] CsrfProtectedFormError)
}
fn render_error(err: Error) -> (StatusCode, String) {
match err {
Error::NotFound(msg) => (StatusCode::NOT_FOUND, msg),
Error::CsrfError(err) => (StatusCode::BAD_REQUEST, err.to_string()),
}
}
async fn route(req: &mut Parts, body: Body) -> Result<Response, Error> {
match (&req.method, req.uri.path()) {
(&Method::GET, "/form") => Ok(get_form(req)),
(&Method::POST, "/form") => post_form(req, body).await,
_ => return Err(Error::NotFound("page not found".to_owned()))
}
}
fn get_form(req: &mut Parts) -> Response {
let mut response = Builder::new();
let csrf_input = req.csrf_html_input(&mut response);
response.content_type(mime::TEXT_HTML).body(
format!("<form method=post>
<input name=text>{}<button>Submit</button></form>", csrf_input).into()
).unwrap()
}
#[derive(Deserialize)]
struct FormData {text: String}
async fn post_form(req: &mut Parts, body: Body) -> Result<Response, Error> {
let msg: FormData = body.into_form_csrf(req).await?;
Ok(Builder::new().body(
format!("hello {}", msg.text).into()
).unwrap())
}
async fn service(req: hyper::Request<hyper::Body>) -> Result<hyper::Response<hyper::Body>, Infallible> {
let (mut parts, body) = req.into_parts();
match route(&mut parts, body).await {
Ok(res) => Ok(res),
Err(err) => {
let (code, message) = render_error(err);
// you can easily wrap or log errors here
Ok(hyper::Response::builder().status(code).body(message.into()).unwrap())
}
}
}
#[tokio::main]
async fn main() {
let service = make_service_fn(move |_| {
async move {
Ok::<_, hyper::Error>(service_fn(move |req| {
service(req)
}))
}
});
let addr = ([127, 0, 0, 1], 8000).into();
let server = Server::bind(&addr).serve(service);
println!("Listening on http://{}", addr);
server.await;
}
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