Struct routefinder::Router

pub struct Router<Handler> { /* private fields */ }

The top level struct for routefinder

A router represents an ordered set of routes which can be applied to a given request path, and any handler T that is associated with each route

Implementations

impl<Handler> Router<Handler>

pub fn new() -> Self

Builds a new router

let mut router = routefinder::Router::new();
router.add("/", ()).unwrap(); // here we use () as the handler
assert!(router.best_match("/").is_some());

pub fn add<R>( &mut self, route: R, handler: Handler ) -> Result<(), <R as TryInto<RouteSpec>>::Error>

where R: TryInto<RouteSpec>,

Adds a route to the router, accepting any type that implements TryInto<RouteSpec>. In most circumstances, this will be a &str or a String.

let mut router = routefinder::Router::new();
assert!(router.add("*named_wildcard", ()).is_err());
assert!(router.add("*", ()).is_ok());
assert!(router.add(format!("/dynamic/{}", "route"), ()).is_ok());

pub fn best_match<'a, 'b>( &'a self, path: &'b str ) -> Option<Match<'a, 'b, Handler>>

Returns the single best route match as defined by the sorting rules. To compare any two routes, step through each Segment and find the first pair that are not equal, according to: Exact > Param > Wildcard > (dots and slashes) As a result, /hello > /:param > /*. Because we can sort the routes before encountering a path, we evaluate them from highest to lowest weight and an early return as soon as we find a match.

let mut router = routefinder::Router::new();
router.add("*", 0).unwrap();
router.add("/:param", 1).unwrap();
router.add("/hello", 2).unwrap();
assert_eq!(*router.best_match("/hello").unwrap(), 2);
assert_eq!(*router.best_match("/hey").unwrap(), 1);
assert_eq!(router.best_match("/hey").unwrap().captures().get("param"), Some("hey"));
assert_eq!(*router.best_match("/hey/there").unwrap(), 0);
assert_eq!(*router.best_match("/").unwrap(), 0);

pub fn matches<'a, 'b>(&'a self, path: &'b str) -> Vec<Match<'a, 'b, Handler>>

Returns all of the matching routes for a given path. This is probably not what you want, as Router::best_match is more efficient. The primary reason you’d want to use matches is to implement different route precedence rules or for testing.

let mut router = routefinder::Router::new();
router.add("*", ()).unwrap();
router.add("/:param", ()).unwrap();
router.add("/hello", ()).unwrap();
assert_eq!(router.matches("/").len(), 1);
assert_eq!(router.matches("/hello").len(), 3);
assert_eq!(router.matches("/hey").len(), 2);
assert_eq!(router.matches("/hey/there").len(), 1);

pub fn match_iter<'a, 'b>(&'a self, path: &'b str) -> MatchIter<'a, 'b, Handler>

Returns an iterator over the possible matches for this particular path. Because rust iterators are lazy, this is useful for some filtering operations that might otherwise use Router::matches, which is this iterator collected into a vec.

pub fn iter(&self) -> impl Iterator<Item = (&RouteSpec, &Handler)>

Returns an iterator of references to (&RouteSpec, &Handler)

let mut router = routefinder::Router::new();
router.add("*", 1).unwrap();
router.add("/:param", 2).unwrap();
router.add("/hello", 3).unwrap();
let (route, handler) = router.iter().next().unwrap();
assert_eq!(route.to_string(), "/hello");
assert_eq!(handler, &3);

pub fn iter_mut(&mut self) -> impl Iterator<Item = (&RouteSpec, &mut Handler)>

returns an iterator of (&RouteSpec, &mut Handler)

let mut router = routefinder::Router::new();
router.add("*", 1).unwrap();
router.add("/:param", 2).unwrap();
router.add("/hello", 3).unwrap();

assert_eq!(*router.best_match("/hello").unwrap(), 3);
let (route, handler) = router.iter_mut().next().unwrap();
assert_eq!(route.to_string(), "/hello");
*handler = 10;
assert_eq!(*router.best_match("/hello").unwrap(), 10);

pub fn len(&self) -> usize

returns the number of routes that have been added

pub fn is_empty(&self) -> bool

returns true if no routes have been added

pub fn get_handler(&self, spec: impl TryInto<RouteSpec>) -> Option<&Handler>

get a reference to the handler for the given route spec

pub fn get_handler_mut( &mut self, spec: impl TryInto<RouteSpec> ) -> Option<&mut Handler>

get a mut reference to the handler for the given route spec

Trait Implementations

impl<Handler> Debug for Router<Handler>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<Handler> Default for Router<Handler>

fn default() -> Self

Returns the “default value” for a type.

impl<Handler> FromIterator<(RouteSpec, Handler)> for Router<Handler>

fn from_iter<T: IntoIterator<Item = (RouteSpec, Handler)>>(iter: T) -> Self

Creates a value from an iterator.

impl<'a, Handler: 'a> IntoIterator for &'a Router<Handler>

type Item = (&'a RouteSpec, &'a Handler)

The type of the elements being iterated over.

type IntoIter = Iter<'a, RouteSpec, Handler>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl<'a, Handler: 'a> IntoIterator for &'a mut Router<Handler>

type Item = (&'a RouteSpec, &'a mut Handler)

The type of the elements being iterated over.

type IntoIter = IterMut<'a, RouteSpec, Handler>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl<Handler> IntoIterator for Router<Handler>

type Item = (RouteSpec, Handler)

The type of the elements being iterated over.

type IntoIter = IntoIter<RouteSpec, Handler>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.