Add local() filter to get the local address of the connection

Cargo.toml

@@ -23,7 +23,7 @@ futures-util = { version = "0.3", default-features = false, features = ["sink"]
 futures-channel = { version = "0.3.17", features = ["sink"]}
 headers = "0.3.5"
 http = "0.2"
-hyper = { version = "0.14", features = ["stream", "server", "http1", "http2", "tcp", "client"] }
+hyper = { version = "0.14.19", features = ["stream", "server", "http1", "http2", "tcp", "client"] }
 log = "0.4"
 mime = "0.3"
 mime_guess = "2.0.0"

src/filter/service.rs

@@ -73,11 +73,12 @@ where
     pub(crate) fn call_with_addr(
         &self,
         req: Request,
+        local_addr: Option<SocketAddr>,
         remote_addr: Option<SocketAddr>,
     ) -> FilteredFuture<F::Future> {
         debug_assert!(!route::is_set(), "nested route::set calls");
 
-        let route = Route::new(req, remote_addr);
+        let route = Route::new(req, local_addr, remote_addr);
         let fut = route::set(&route, || self.filter.filter(super::Internal));
         FilteredFuture { future: fut, route }
     }
@@ -99,7 +100,7 @@ where
 
     #[inline]
     fn call(&mut self, req: Request) -> Self::Future {
-        self.call_with_addr(req, None)
+        self.call_with_addr(req, None, None)
     }
 }
 

src/filters/addr.rs

@@ -5,6 +5,26 @@ use std::net::SocketAddr;
 
 use crate::filter::{filter_fn_one, Filter};
 
+/// Creates a `Filter` to get the local address of the connection.
+///
+/// If the underlying transport doesn't use socket addresses, this will yield
+/// `None`.
+///
+/// # Example
+///
+/// ```
+/// use std::net::SocketAddr;
+/// use warp::Filter;
+///
+/// let route = warp::addr::local()
+///     .map(|addr: Option<SocketAddr>| {
+///         println!("local address = {:?}", addr);
+///     });
+/// ```
+pub fn local() -> impl Filter<Extract = (Option<SocketAddr>,), Error = Infallible> + Copy {
+    filter_fn_one(|route| futures_util::future::ok(route.local_addr()))
+}
+
 /// Creates a `Filter` to get the remote address of the connection.
 ///
 /// If the underlying transport doesn't use socket addresses, this will yield

src/filters/log.rs

@@ -109,6 +109,11 @@ where
 }
 
 impl<'a> Info<'a> {
+    /// View the local `SocketAddr` of the request.
+    pub fn local_addr(&self) -> Option<SocketAddr> {
+        self.route.local_addr()
+    }
+
     /// View the remote `SocketAddr` of the request.
     pub fn remote_addr(&self) -> Option<SocketAddr> {
         self.route.remote_addr()

src/filters/trace.rs

@@ -157,6 +157,11 @@ where
 }
 
 impl<'a> Info<'a> {
+    /// View the local `SocketAddr` of the request.
+    pub fn local_addr(&self) -> Option<SocketAddr> {
+        self.route.local_addr()
+    }
+
     /// View the remote `SocketAddr` of the request.
     pub fn remote_addr(&self) -> Option<SocketAddr> {
         self.route.remote_addr()

src/route.rs

@@ -30,6 +30,7 @@ where
 #[derive(Debug)]
 pub(crate) struct Route {
     body: BodyState,
+    local_addr: Option<SocketAddr>,
     remote_addr: Option<SocketAddr>,
     req: Request,
     segments_index: usize,
@@ -42,7 +43,9 @@ enum BodyState {
 }
 
 impl Route {
-    pub(crate) fn new(req: Request, remote_addr: Option<SocketAddr>) -> RefCell<Route> {
+    pub(crate) fn new(req: Request,
+        local_addr: Option<SocketAddr>,
+        remote_addr: Option<SocketAddr>) -> RefCell<Route> {
         let segments_index = if req.uri().path().starts_with('/') {
             // Skip the beginning slash.
             1
@@ -52,6 +55,7 @@ impl Route {
 
         RefCell::new(Route {
             body: BodyState::Ready,
+            local_addr,
             remote_addr,
             req,
             segments_index,
@@ -123,6 +127,10 @@ impl Route {
         self.segments_index = index;
     }
 
+    pub(crate) fn local_addr(&self) -> Option<SocketAddr> {
+        self.local_addr
+    }
+
     pub(crate) fn remote_addr(&self) -> Option<SocketAddr> {
         self.remote_addr
     }

src/server.rs

@@ -55,9 +55,10 @@ macro_rules! into_service {
         let inner = crate::service($into);
         make_service_fn(move |transport| {
             let inner = inner.clone();
+            let local_addr = Transport::local_addr(transport);
             let remote_addr = Transport::remote_addr(transport);
             future::ok::<_, Infallible>(service_fn(move |req| {
-                inner.call_with_addr(req, remote_addr)
+                inner.call_with_addr(req, local_addr, remote_addr)
             }))
         })
     }};

src/test.rs

@@ -123,6 +123,7 @@ use self::inner::OneOrTuple;
 /// Starts a new test `RequestBuilder`.
 pub fn request() -> RequestBuilder {
     RequestBuilder {
+        local_addr: None,
         remote_addr: None,
         req: Request::default(),
     }
@@ -140,6 +141,7 @@ pub fn ws() -> WsBuilder {
 #[must_use = "RequestBuilder does nothing on its own"]
 #[derive(Debug)]
 pub struct RequestBuilder {
+    local_addr: Option<SocketAddr>,
     remote_addr: Option<SocketAddr>,
     req: Request,
 }
@@ -237,6 +239,22 @@ impl RequestBuilder {
         self
     }
 
+    /// Set the local address of this request
+    ///
+    /// Default is no local address.
+    ///
+    /// # Example
+    /// ```
+    /// use std::net::{IpAddr, Ipv4Addr, SocketAddr};
+    ///
+    /// let req = warp::test::request()
+    ///     .local_addr(SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080));
+    /// ```
+    pub fn local_addr(mut self, addr: SocketAddr) -> Self {
+        self.local_addr = Some(addr);
+        self
+    }
+
     /// Set the remote address of this request
     ///
     /// Default is no remote address.
@@ -376,7 +394,7 @@ impl RequestBuilder {
         // TODO: de-duplicate this and apply_filter()
         assert!(!route::is_set(), "nested test filter calls");
 
-        let route = Route::new(self.req, self.remote_addr);
+        let route = Route::new(self.req, self.local_addr, self.remote_addr);
         let mut fut = Box::pin(
             route::set(&route, move || f.filter(crate::filter::Internal)).then(|result| {
                 let res = match result {
@@ -405,7 +423,7 @@ impl RequestBuilder {
     {
         assert!(!route::is_set(), "nested test filter calls");
 
-        let route = Route::new(self.req, self.remote_addr);
+        let route = Route::new(self.req, self.local_addr, self.remote_addr);
         let mut fut = Box::pin(route::set(&route, move || {
             f.filter(crate::filter::Internal)
         }));

src/tls.rs

@@ -281,6 +281,10 @@ impl Read for LazyFile {
 }
 
 impl Transport for TlsStream {
+    fn local_addr(&self) -> Option<SocketAddr> {
+        Some(self.local_addr)
+    }
+
     fn remote_addr(&self) -> Option<SocketAddr> {
         Some(self.remote_addr)
     }
@@ -296,15 +300,18 @@ enum State {
 // TlsStream implements AsyncRead/AsyncWrite handshaking tokio_rustls::Accept first
 pub(crate) struct TlsStream {
     state: State,
+    local_addr: SocketAddr,
     remote_addr: SocketAddr,
 }
 
 impl TlsStream {
     fn new(stream: AddrStream, config: Arc<ServerConfig>) -> TlsStream {
+        let local_addr = stream.local_addr();
         let remote_addr = stream.remote_addr();
         let accept = tokio_rustls::TlsAcceptor::from(config).accept(stream);
         TlsStream {
             state: State::Handshaking(accept),
+            local_addr,
             remote_addr,
         }
     }

src/transport.rs

@@ -7,10 +7,15 @@ use hyper::server::conn::AddrStream;
 use tokio::io::{AsyncRead, AsyncWrite, ReadBuf};
 
 pub trait Transport: AsyncRead + AsyncWrite {
+    fn local_addr(&self) -> Option<SocketAddr>;
     fn remote_addr(&self) -> Option<SocketAddr>;
 }
 
 impl Transport for AddrStream {
+    fn local_addr(&self) -> Option<SocketAddr> {
+        Some(self.local_addr())
+    }
+
     fn remote_addr(&self) -> Option<SocketAddr> {
         Some(self.remote_addr())
     }
@@ -47,6 +52,10 @@ impl<T: AsyncWrite + Unpin> AsyncWrite for LiftIo<T> {
 }
 
 impl<T: AsyncRead + AsyncWrite + Unpin> Transport for LiftIo<T> {
+    fn local_addr(&self) -> Option<SocketAddr> {
+        None
+    }
+
     fn remote_addr(&self) -> Option<SocketAddr> {
         None
     }

tests/addr.rs

@@ -2,6 +2,27 @@
 
 use std::net::{IpAddr, Ipv4Addr, SocketAddr};
 
+#[tokio::test]
+async fn local_addr_missing() {
+    let extract_local_addr = warp::addr::local();
+
+    let req = warp::test::request();
+    let resp = req.filter(&extract_local_addr).await.unwrap();
+    assert_eq!(resp, None)
+}
+
+#[tokio::test]
+async fn local_addr_present() {
+    let extract_local_addr = warp::addr::local();
+
+    let req = warp::test::request().local_addr("1.2.3.4:5678".parse().unwrap());
+    let resp = req.filter(&extract_local_addr).await.unwrap();
+    assert_eq!(
+        resp,
+        Some(SocketAddr::new(IpAddr::V4(Ipv4Addr::new(1, 2, 3, 4)), 5678))
+    )
+}
+
 #[tokio::test]
 async fn remote_addr_missing() {
     let extract_remote_addr = warp::addr::remote();