use crate::Error;
use crate::helpers;
use crate::router::Router;
use crate::types::{RequestContext, RequestInfo, RequestMeta};
use bytes::BytesMut;
use http_body_util::BodyExt;
use http_body_util::Full;
use hyper::body::Bytes;
use hyper::body::Incoming;
use hyper::{Request, Response, service::Service};
use std::future::Future;
use std::net::SocketAddr;
use std::pin::Pin;
use std::sync::Arc;
pub struct RequestService<E> {
pub(crate) router: Arc<Router<E>>,
pub(crate) remote_addr: SocketAddr,
}
impl<E> Service<Request<Full<Bytes>>> for RequestService<E>
where
E: Into<Box<dyn std::error::Error + Send + Sync>> + 'static,
{
type Response = Response<Full<Bytes>>;
type Error = crate::RouteError;
#[allow(clippy::type_complexity)]
type Future = Pin<Box<dyn Future<Output = Result<Self::Response, Self::Error>> + Send + 'static>>;
fn call(&self, mut req: Request<Full<Bytes>>) -> Self::Future {
let router = self.router.clone();
let remote_addr = self.remote_addr;
let fut = async move {
helpers::update_req_meta_in_extensions(req.extensions_mut(), RequestMeta::with_remote_addr(remote_addr));
let mut target_path = helpers::percent_decode_request_path(req.uri().path())
.map_err(|e| Error::new(format!("Couldn't percent decode request path: {}", e)))?;
if target_path.is_empty() || target_path.as_bytes()[target_path.len() - 1] != b'/' {
target_path.push('/');
}
let mut req_info = None;
let should_gen_req_info = router
.should_gen_req_info
.expect("The `should_gen_req_info` flag in Router is not initialized");
let context = RequestContext::new();
if should_gen_req_info {
req_info = Some(RequestInfo::new_from_req(&req, context.clone()));
}
req.extensions_mut().insert(context);
router.process(target_path.as_str(), req, req_info.clone()).await
};
Box::pin(fut)
}
}
impl<E> Service<Request<Incoming>> for RequestService<E>
where
E: Into<Box<dyn std::error::Error + Send + Sync>> + 'static,
{
type Response = Response<Full<Bytes>>;
type Error = crate::RouteError;
#[allow(clippy::type_complexity)]
type Future = Pin<Box<dyn Future<Output = Result<Self::Response, Self::Error>> + Send + 'static>>;
fn call(&self, mut req: Request<Incoming>) -> Self::Future {
let router = self.router.clone();
let remote_addr = self.remote_addr;
let fut = async move {
helpers::update_req_meta_in_extensions(req.extensions_mut(), RequestMeta::with_remote_addr(remote_addr));
let mut target_path = helpers::percent_decode_request_path(req.uri().path())
.map_err(|e| Error::new(format!("Couldn't percent decode request path: {}", e)))?;
if target_path.is_empty() || target_path.as_bytes()[target_path.len() - 1] != b'/' {
target_path.push('/');
}
let mut req_info = None;
let should_gen_req_info = router
.should_gen_req_info
.expect("The `should_gen_req_info` flag in Router is not initialized");
let context = RequestContext::new();
if should_gen_req_info {
req_info = Some(RequestInfo::new_from_req(&req, context.clone()));
}
req.extensions_mut().insert(context);
let (parts, mut body) = req.into_parts();
let mut buf = BytesMut::new();
while let Some(frame) = body.frame().await {
let frame = frame?;
if let Some(data) = frame.data_ref() {
buf.extend_from_slice(data);
}
}
let collected = buf.freeze();
let req_rebuilt = Request::from_parts(parts, Full::new(collected));
router
.process(target_path.as_str(), req_rebuilt, req_info.clone())
.await
};
Box::pin(fut)
}
}
#[derive(Debug)]
pub struct RequestServiceBuilder<E> {
router: Arc<Router<E>>,
}
impl<E: Into<Box<dyn std::error::Error + Send + Sync>> + 'static> RequestServiceBuilder<E> {
pub fn new(mut router: Router<E>) -> crate::Result<Self> {
router.init_global_options_route();
router.init_default_404_route();
router.init_err_handler();
router.init_regex_set()?;
router.init_req_info_gen();
Ok(Self {
router: Arc::from(router),
})
}
pub fn build(&self, remote_addr: SocketAddr) -> RequestService<E> {
RequestService {
router: self.router.clone(),
remote_addr,
}
}
}
#[cfg(test)]
mod tests {
use crate::{Error, RequestServiceBuilder, RouteError, Router};
use futures::future::poll_fn;
use http::Method;
use http_body_util::Full;
use hyper::service::Service;
use hyper::{Request, Response, body::Bytes};
use std::net::SocketAddr;
use std::str::FromStr;
use std::task::Poll;
#[tokio::test]
async fn should_route_request() {
const RESPONSE_TEXT: &str = "Hello world!";
let remote_addr = SocketAddr::from_str("0.0.0.0:8080").unwrap();
let router: Router<Error> = Router::builder()
.get("/", |_: _| async move {
Ok(Response::new(Full::new(hyper::body::Bytes::from(RESPONSE_TEXT))))
})
.build()
.unwrap();
let req: Request<Full<Bytes>> = Request::builder()
.method(Method::GET)
.uri("/")
.body(Full::new(Bytes::new()))
.unwrap();
let builder = RequestServiceBuilder::<Error>::new(router).unwrap();
let service = builder.build(remote_addr);
poll_fn(|_| -> Poll<Result<(), RouteError>> { Poll::Ready(Ok(())) })
.await
.expect("request service is not ready");
let resp: Response<Full<hyper::body::Bytes>> = service.call(req).await.unwrap();
let body = resp.into_body();
let body_bytes = http_body_util::BodyExt::collect(body).await.unwrap().to_bytes();
let body = String::from_utf8(body_bytes.to_vec()).unwrap();
assert_eq!(RESPONSE_TEXT, body)
}
}