static_web_server/
service.rs

1// SPDX-License-Identifier: MIT OR Apache-2.0
2// This file is part of Static Web Server.
3// See https://static-web-server.net/ for more information
4// Copyright (C) 2019-present Jose Quintana <joseluisq.net>
5
6//! The module provides a custom [Hyper service](hyper::service::Service).
7//!
8
9use hyper::{Body, Request, Response, service::Service};
10use std::convert::Infallible;
11use std::future::{Future, Ready, ready};
12use std::net::SocketAddr;
13use std::pin::Pin;
14use std::sync::Arc;
15use std::task::{Context, Poll};
16
17use crate::{Error, handler::RequestHandler, transport::Transport};
18
19#[cfg(feature = "metrics")]
20use crate::metrics;
21
22/// It defines the router service which is the main entry point for Hyper Server.
23pub struct RouterService {
24    builder: RequestServiceBuilder,
25}
26
27impl RouterService {
28    /// Creates a new router service.
29    pub fn new(handler: RequestHandler) -> Self {
30        Self {
31            builder: RequestServiceBuilder::new(handler),
32        }
33    }
34}
35
36impl<T: Transport + Send + 'static> Service<&T> for RouterService {
37    type Response = RequestService;
38    type Error = Infallible;
39    type Future = Ready<Result<Self::Response, Self::Error>>;
40
41    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
42        Poll::Ready(Ok(()))
43    }
44
45    fn call(&mut self, conn: &T) -> Self::Future {
46        ready(Ok(self.builder.build(conn.remote_addr())))
47    }
48}
49
50/// It defines a Hyper service request which delegates a request handler.
51pub struct RequestService {
52    handler: Arc<RequestHandler>,
53    remote_addr: Option<SocketAddr>,
54}
55
56impl RequestService {
57    fn new(handler: Arc<RequestHandler>, remote_addr: Option<SocketAddr>) -> Self {
58        #[cfg(feature = "metrics")]
59        metrics::inc_connections();
60        Self {
61            handler,
62            remote_addr,
63        }
64    }
65}
66
67#[cfg(feature = "metrics")]
68impl Drop for RequestService {
69    fn drop(&mut self) {
70        metrics::dec_connections();
71    }
72}
73
74impl Service<Request<Body>> for RequestService {
75    type Response = Response<Body>;
76    type Error = Error;
77    type Future = Pin<Box<dyn Future<Output = Result<Response<Body>, Error>> + Send + 'static>>;
78
79    fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Error>> {
80        Poll::Ready(Ok(()))
81    }
82
83    fn call(&mut self, mut req: Request<Body>) -> Self::Future {
84        let handler = self.handler.clone();
85        let remote_addr = self.remote_addr;
86        Box::pin(async move { handler.handle(&mut req, remote_addr).await })
87    }
88}
89
90/// It defines a Hyper service request builder.
91pub struct RequestServiceBuilder {
92    handler: Arc<RequestHandler>,
93}
94
95impl RequestServiceBuilder {
96    /// Initializes a new request service builder.
97    pub fn new(handler: RequestHandler) -> Self {
98        Self {
99            handler: Arc::new(handler),
100        }
101    }
102
103    /// Build a new request service.
104    pub fn build(&self, remote_addr: Option<SocketAddr>) -> RequestService {
105        RequestService::new(self.handler.clone(), remote_addr)
106    }
107}
static_web_server/service.rs

static_web_server/
service.rs
