Add trailing segments to request

examples/routing.rs

@@ -18,31 +18,33 @@ async fn main() -> Result<()> {
         .await
 }
 
-fn handle_base(_: Request) -> BoxFuture<'static, Result<Response>> {
-    let doc = generate_doc("base");
+fn handle_base(req: Request) -> BoxFuture<'static, Result<Response>> {
+    let doc = generate_doc("base", &req);
     async move {
         Ok(Response::document(doc))
     }.boxed()
 }
 
-fn handle_short(_: Request) -> BoxFuture<'static, Result<Response>> {
-    let doc = generate_doc("short");
+fn handle_short(req: Request) -> BoxFuture<'static, Result<Response>> {
+    let doc = generate_doc("short", &req);
     async move {
         Ok(Response::document(doc))
     }.boxed()
 }
 
-fn handle_long(_: Request) -> BoxFuture<'static, Result<Response>> {
-    let doc = generate_doc("long");
+fn handle_long(req: Request) -> BoxFuture<'static, Result<Response>> {
+    let doc = generate_doc("long", &req);
     async move {
         Ok(Response::document(doc))
     }.boxed()
 }
 
-fn generate_doc(route_name: &str) -> Document {
+fn generate_doc(route_name: &str, req: &Request) -> Document {
+    let trailing = req.trailing_segments().join("/");
     let mut doc = Document::new();
     doc.add_heading(HeadingLevel::H1, "Routing Demo")
        .add_text(&format!("You're currently on the {} route", route_name))
+       .add_text(&format!("Trailing segments: /{}", trailing))
        .add_blank_line()
        .add_text("Here's some links to try:")
        .add_link_without_label("/")

src/lib.rs

@@ -95,7 +95,9 @@ impl Server {
 
         request.set_cert(client_cert);
 
-        let response = if let Some(handler) = self.routes.match_request(&request) {
+        let response = if let Some((trailing, handler)) = self.routes.match_request(&request) {
+
+            request.set_trailing(trailing);
 
             let handler = (handler)(request);
             let handler = AssertUnwindSafe(handler);

src/routing.rs

@@ -2,7 +2,7 @@
 //!
 //! See [`RoutingNode`] for details on how routes are matched.
 
-use uriparse::path::Path;
+use uriparse::path::{Path, Segment};
 
 use std::collections::HashMap;
 use std::convert::TryInto;
@@ -34,39 +34,64 @@ impl RoutingNode {
     /// represented as a sequence of path segments.  For example, "/dir/image.png?text"
     /// should be represented as `&["dir", "image.png"]`.
     ///
+    /// If a match is found, it is returned, along with the segments of the path trailing
+    /// the handler.  For example, a route `/foo` recieving a request to `/foo/bar` would
+    /// receive `vec!["bar"]`
+    ///
     /// See [`RoutingNode`] for details on how routes are matched.
-    pub fn match_path<I,S>(&self, path: I) -> Option<&Handler>
+    pub fn match_path<I,S>(&self, path: I) -> Option<(Vec<S>, &Handler)>
     where
         I: IntoIterator<Item=S>,
         S: AsRef<str>,
     {
         let mut node = self;
-        let mut path = path.into_iter();
+        let mut path = path.into_iter().filter(|seg| !seg.as_ref().is_empty());
         let mut last_seen_handler = None;
+        let mut since_last_handler = Vec::new();
         loop {
             let Self(maybe_handler, map) = node;
 
-            last_seen_handler = maybe_handler.as_ref().or(last_seen_handler);
+            if maybe_handler.is_some() {
+                last_seen_handler = maybe_handler.as_ref();
+                since_last_handler.clear();
+            }
 
             if let Some(segment) = path.next() {
-                if let Some(route) = map.get(segment.as_ref()) {
+                let maybe_route = map.get(segment.as_ref());
+                since_last_handler.push(segment);
+
+                if let Some(route) = maybe_route {
                     node = route;
                 } else {
-                    return last_seen_handler;
+                    break;
                 }
             } else {
-                return last_seen_handler;
+                break;
             }
+        };
+
+        if let Some(handler) = last_seen_handler {
+            since_last_handler.extend(path);
+            Some((since_last_handler, handler))
+        } else {
+            None
         }
     }
 
     /// Attempt to identify a route for a given [`Request`]
     ///
-    /// See [`RoutingNode`] for details on how routes are matched.
-    pub fn match_request(&self, req: &Request) -> Option<&Handler> {
-        let mut path = req.path().to_owned();
+    /// See [`RoutingNode::match_path()`] for more information
+    pub fn match_request(&self, req: &Request) -> Option<(Vec<String>, &Handler)> {
+        let mut path = req.path().to_borrowed();
         path.normalize(false);
         self.match_path(path.segments())
+            .map(|(segs, h)| (
+                segs.into_iter()
+                    .map(Segment::as_str)
+                    .map(str::to_owned)
+                    .collect(),
+                h,
+            ))
     }
 
     /// Add a route to the network

src/types/request.rs

@@ -8,6 +8,7 @@ pub struct Request {
     uri: URIReference<'static>,
     input: Option<String>,
     certificate: Option<Certificate>,
+    trailing_segments: Option<Vec<String>>,
 }
 
 impl Request {
@@ -36,6 +37,7 @@ impl Request {
             uri,
             input,
             certificate,
+            trailing_segments: None,
         })
     }
 
@@ -43,6 +45,31 @@ impl Request {
         &self.uri
     }
 
+    #[allow(clippy::missing_const_for_fn)]
+    /// All of the path segments following the route to which this request was bound.
+    ///
+    /// For example, if this handler was bound to the `/api` route, and a request was
+    /// received to `/api/v1/endpoint`, then this value would be `["v1", "endpoint"]`.
+    /// This should not be confused with [`path_segments()`](Self::path_segments()), which
+    /// contains *all* of the segments, not just those trailing the route.
+    ///
+    /// If the trailing segments have not been set, this method will panic, but this
+    /// should only be possible if you are constructing the Request yourself.  Requests
+    /// to handlers registered through [`add_route`](northstar::Builder::add_route()) will
+    /// always have trailing segments set.
+    pub fn trailing_segments(&self) -> &Vec<String> {
+        self.trailing_segments.as_ref().unwrap()
+    }
+
+    /// All of the segments in this path, percent decoded
+    ///
+    /// For example, for a request to `/api/v1/endpoint`, this would return `["api", "v1",
+    /// "endpoint"]`, no matter what route the handler that recieved this request was
+    /// bound to.  This is not to be confused with
+    /// [`trailing_segments()`](Self::trailing_segments), which contains only the segments
+    /// following the bound route.
+    ///
+    /// Additionally, unlike `trailing_segments()`, this method percent decodes the path.
     pub fn path_segments(&self) -> Vec<String> {
         self.uri()
             .path()
@@ -60,6 +87,10 @@ impl Request {
         self.certificate = cert;
     }
 
+    pub fn set_trailing(&mut self, segments: Vec<String>) {
+        self.trailing_segments = Some(segments);
+    }
+
     pub const fn certificate(&self) -> Option<&Certificate> {
         self.certificate.as_ref()
     }