Add trailing segments to request

This commit is contained in:
Emi Tatsuo 2020-11-20 13:22:34 -05:00
parent 54816e1f67
commit 59e3222ce8
Signed by: Emi
GPG key ID: 68FAB2E2E6DFC98B
4 changed files with 78 additions and 18 deletions

View file

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

View file

@ -95,7 +95,9 @@ impl Server {
request.set_cert(client_cert); 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 = (handler)(request);
let handler = AssertUnwindSafe(handler); let handler = AssertUnwindSafe(handler);

View file

@ -2,7 +2,7 @@
//! //!
//! See [`RoutingNode`] for details on how routes are matched. //! See [`RoutingNode`] for details on how routes are matched.
use uriparse::path::Path; use uriparse::path::{Path, Segment};
use std::collections::HashMap; use std::collections::HashMap;
use std::convert::TryInto; use std::convert::TryInto;
@ -34,39 +34,64 @@ impl RoutingNode {
/// represented as a sequence of path segments. For example, "/dir/image.png?text" /// represented as a sequence of path segments. For example, "/dir/image.png?text"
/// should be represented as `&["dir", "image.png"]`. /// 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. /// 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 where
I: IntoIterator<Item=S>, I: IntoIterator<Item=S>,
S: AsRef<str>, S: AsRef<str>,
{ {
let mut node = self; 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 last_seen_handler = None;
let mut since_last_handler = Vec::new();
loop { loop {
let Self(maybe_handler, map) = node; 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(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; node = route;
} else { } else {
return last_seen_handler; break;
} }
} else { } 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`] /// Attempt to identify a route for a given [`Request`]
/// ///
/// See [`RoutingNode`] for details on how routes are matched. /// See [`RoutingNode::match_path()`] for more information
pub fn match_request(&self, req: &Request) -> Option<&Handler> { pub fn match_request(&self, req: &Request) -> Option<(Vec<String>, &Handler)> {
let mut path = req.path().to_owned(); let mut path = req.path().to_borrowed();
path.normalize(false); path.normalize(false);
self.match_path(path.segments()) 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 /// Add a route to the network

View file

@ -8,6 +8,7 @@ pub struct Request {
uri: URIReference<'static>, uri: URIReference<'static>,
input: Option<String>, input: Option<String>,
certificate: Option<Certificate>, certificate: Option<Certificate>,
trailing_segments: Option<Vec<String>>,
} }
impl Request { impl Request {
@ -36,6 +37,7 @@ impl Request {
uri, uri,
input, input,
certificate, certificate,
trailing_segments: None,
}) })
} }
@ -43,6 +45,31 @@ impl Request {
&self.uri &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> { pub fn path_segments(&self) -> Vec<String> {
self.uri() self.uri()
.path() .path()
@ -60,6 +87,10 @@ impl Request {
self.certificate = cert; self.certificate = cert;
} }
pub fn set_trailing(&mut self, segments: Vec<String>) {
self.trailing_segments = Some(segments);
}
pub const fn certificate(&self) -> Option<&Certificate> { pub const fn certificate(&self) -> Option<&Certificate> {
self.certificate.as_ref() self.certificate.as_ref()
} }