Struct rocket::Route

source ·
pub struct Route {
    pub name: Option<Cow<'static, str>>,
    pub method: Method,
    pub handler: Box<dyn Handler>,
    pub uri: RouteUri<'static>,
    pub rank: isize,
    pub format: Option<MediaType>,
    /* private fields */
}
Expand description

A request handling route.

A route consists of exactly the information in its fields. While a Route can be instantiated directly, doing so should be a rare or nonexistent event. Instead, a Rocket application should use Rocket’s #[route] series of attributes to generate a Route.

#[get("/route/<path..>?query", rank = 2, format = "json")]
fn route_name(path: PathBuf) { /* handler procedure */ }

use rocket::http::{Method, MediaType};

let route = routes![route_name].remove(0);
assert_eq!(route.name.unwrap(), "route_name");
assert_eq!(route.method, Method::Get);
assert_eq!(route.uri, "/route/<path..>?query");
assert_eq!(route.rank, 2);
assert_eq!(route.format.unwrap(), MediaType::JSON);

Note that the rank and format attribute parameters are optional. See #[route] for details on macro usage. Note also that a route’s mounted base becomes part of its URI; see RouteUri for details.

Routing

A request matches a route iff:

  • The route’s method matches that of the incoming request.
  • The route’s format (if any) matches that of the incoming request.
    • If route specifies a format, it only matches requests for that format.
    • If route doesn’t specify a format, it matches requests for any format.
    • A route’s format matches against the Accept header in the request when the route’s method supports_payload() and Content-Type header otherwise.
    • Non-specific Accept header components (*) match anything.
  • All static components in the route’s path match the corresponding components in the same position in the incoming request.
  • All static components in the route’s query string are also in the request query string, though in any position. If there is no query in the route, requests with and without queries match.

Rocket routes requests to matching routes.

Collisions

Two routes are said to collide if there exists a request that matches both routes. Colliding routes present a routing ambiguity and are thus disallowed by Rocket. Because routes can be constructed dynamically, collision checking is done at ignite time, after it becomes statically impossible to add any more routes to an instance of Rocket.

Note that because query parsing is always lenient – extra and missing query parameters are allowed – queries do not directly impact whether two routes collide.

Resolving Collisions

Collisions are resolved through ranking. Routes with lower ranks have higher precedence during routing than routes with higher ranks. Thus, routes are attempted in ascending rank order. If a higher precedence route returns an Outcome of Forward, the next highest precedence route is attempted, and so on, until a route returns Success or Error, or there are no more routes to try. When all routes have been attempted, Rocket issues a 404 error, handled by the appropriate Catcher.

Default Ranking

Most collisions are automatically resolved by Rocket’s default rank. The default rank prefers static components over dynamic components in both paths and queries: the more static a route’s path and query are, the lower its rank and thus the higher its precedence.

There are three “colors” to paths and queries:

  1. static - all components are static
  2. partial - at least one, but not all, components are dynamic
  3. wild - all components are dynamic

Static paths carry more weight than static queries. The same is true for partial and wild paths. This results in the following default ranking table:

pathqueryrank
staticstatic-12
staticpartial-11
staticwild-10
staticnone-9
partialstatic-8
partialpartial-7
partialwild-6
partialnone-5
wildstatic-4
wildpartial-3
wildwild-2
wildnone-1

Recall that lower ranks have higher precedence.

Example

use rocket::Route;
use rocket::http::Method;

macro_rules! assert_rank {
    ($($uri:expr => $rank:expr,)*) => {$(
        let route = Route::new(Method::Get, $uri, rocket::route::dummy_handler);
        assert_eq!(route.rank, $rank);
    )*}
}

assert_rank! {
    "/?foo" => -12,                 // static path, static query
    "/foo/bar?a=b&bob" => -12,      // static path, static query
    "/?a=b&bob" => -12,             // static path, static query

    "/?a&<zoo..>" => -11,           // static path, partial query
    "/foo?a&<zoo..>" => -11,        // static path, partial query
    "/?a&<zoo>" => -11,             // static path, partial query

    "/?<zoo..>" => -10,             // static path, wild query
    "/foo?<zoo..>" => -10,          // static path, wild query
    "/foo?<a>&<b>" => -10,          // static path, wild query

    "/" => -9,                      // static path, no query
    "/foo/bar" => -9,               // static path, no query

    "/a/<b>?foo" => -8,             // partial path, static query
    "/a/<b..>?foo" => -8,           // partial path, static query
    "/<a>/b?foo" => -8,             // partial path, static query

    "/a/<b>?<b>&c" => -7,           // partial path, partial query
    "/a/<b..>?a&<c..>" => -7,       // partial path, partial query

    "/a/<b>?<c..>" => -6,           // partial path, wild query
    "/a/<b..>?<c>&<d>" => -6,       // partial path, wild query
    "/a/<b..>?<c>" => -6,           // partial path, wild query

    "/a/<b>" => -5,                 // partial path, no query
    "/<a>/b" => -5,                 // partial path, no query
    "/a/<b..>" => -5,               // partial path, no query

    "/<b>/<c>?foo&bar" => -4,       // wild path, static query
    "/<a>/<b..>?foo" => -4,         // wild path, static query
    "/<b..>?cat" => -4,             // wild path, static query

    "/<b>/<c>?<foo>&bar" => -3,     // wild path, partial query
    "/<a>/<b..>?a&<b..>" => -3,     // wild path, partial query
    "/<b..>?cat&<dog>" => -3,       // wild path, partial query

    "/<b>/<c>?<foo>" => -2,         // wild path, wild query
    "/<a>/<b..>?<b..>" => -2,       // wild path, wild query
    "/<b..>?<c>&<dog>" => -2,       // wild path, wild query

    "/<b>/<c>" => -1,               // wild path, no query
    "/<a>/<b..>" => -1,             // wild path, no query
    "/<b..>" => -1,                 // wild path, no query
}

Fields§

§name: Option<Cow<'static, str>>

The name of this route, if one was given.

§method: Method

The method this route matches against.

§handler: Box<dyn Handler>

The function that should be called when the route matches.

§uri: RouteUri<'static>

The route URI.

§rank: isize

The rank of this route. Lower ranks have higher priorities.

§format: Option<MediaType>

The media type this route matches against, if any.

Implementations§

source§

impl Route

source

pub fn new<H: Handler>(method: Method, uri: &str, handler: H) -> Route

Creates a new route with the given method, path, and handler with a base of / and a computed default rank.

Panics

Panics if path is not a valid Rocket route URI.

Example
use rocket::Route;
use rocket::http::Method;

// this is a rank 1 route matching requests to `GET /`
let index = Route::new(Method::Get, "/", handler);
assert_eq!(index.rank, -9);
assert_eq!(index.method, Method::Get);
assert_eq!(index.uri, "/");
source

pub fn ranked<H, R>(rank: R, method: Method, uri: &str, handler: H) -> Routewhere H: Handler + 'static, R: Into<Option<isize>>,

Creates a new route with the given rank, method, path, and handler with a base of /. If rank is None, the computed default rank is used.

Panics

Panics if path is not a valid Rocket route URI.

Example
use rocket::Route;
use rocket::http::Method;

let foo = Route::ranked(1, Method::Post, "/foo?bar", handler);
assert_eq!(foo.rank, 1);
assert_eq!(foo.method, Method::Post);
assert_eq!(foo.uri, "/foo?bar");

let foo = Route::ranked(None, Method::Post, "/foo?bar", handler);
assert_eq!(foo.rank, -12);
assert_eq!(foo.method, Method::Post);
assert_eq!(foo.uri, "/foo?bar");
source

pub fn map_base<'a, F>(self, mapper: F) -> Result<Self, Error<'static>>where F: FnOnce(Origin<'a>) -> String,

Maps the base of this route using mapper, returning a new Route with the returned base.

mapper is called with the current base. The returned String is used as the new base if it is a valid URI. If the returned base URI contains a query, it is ignored. Returns an error if the base produced by mapper is not a valid origin URI.

Example
use rocket::Route;
use rocket::http::{Method, uri::Origin};

let index = Route::new(Method::Get, "/foo/bar", handler);
assert_eq!(index.uri.base(), "/");
assert_eq!(index.uri.unmounted_origin.path(), "/foo/bar");
assert_eq!(index.uri.path(), "/foo/bar");

let index = index.map_base(|base| format!("{}{}", "/boo", base)).unwrap();
assert_eq!(index.uri.base(), "/boo");
assert_eq!(index.uri.unmounted_origin.path(), "/foo/bar");
assert_eq!(index.uri.path(), "/boo/foo/bar");

Trait Implementations§

source§

impl Clone for Route

source§

fn clone(&self) -> Route

Returns a copy of the value. Read more
1.0.0 · source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
source§

impl Debug for Route

source§

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

Formats the value using the given formatter. Read more
source§

impl Display for Route

source§

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

Formats the value using the given formatter. Read more
source§

impl<'r> FromRequest<'r> for &'r Route

§

type Error = Infallible

The associated error to be returned if derivation fails.
source§

fn from_request<'life0, 'async_trait>( request: &'r Request<'life0> ) -> Pin<Box<dyn Future<Output = Outcome<Self, Infallible>> + Send + 'async_trait>>where Self: 'async_trait, 'r: 'async_trait, 'life0: 'async_trait,

Derives an instance of Self from the incoming request metadata. Read more

Auto Trait Implementations§

§

impl !RefUnwindSafe for Route

§

impl Send for Route

§

impl Sync for Route

§

impl Unpin for Route

§

impl !UnwindSafe for Route

Blanket Implementations§

source§

impl<T> Any for Twhere T: 'static + ?Sized,

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
§

impl<'a, T> AsTaggedExplicit<'a> for Twhere T: 'a,

§

fn explicit(self, class: Class, tag: u32) -> TaggedParser<'a, Explicit, Self>

§

impl<'a, T> AsTaggedImplicit<'a> for Twhere T: 'a,

§

fn implicit( self, class: Class, constructed: bool, tag: u32 ) -> TaggedParser<'a, Implicit, Self>

source§

impl<T> Borrow<T> for Twhere T: ?Sized,

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for Twhere T: ?Sized,

source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

§

impl<T> Instrument for T

§

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
§

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
source§

impl<T, U> Into<U> for Twhere U: From<T>,

source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

source§

impl<T> IntoCollection<T> for T

source§

fn into_collection<A>(self) -> SmallVec<A>where A: Array<Item = T>,

Converts self into a collection.
source§

fn mapped<U, F, A>(self, f: F) -> SmallVec<A>where F: FnMut(T) -> U, A: Array<Item = U>,

source§

impl<T> Paint for Twhere T: ?Sized,

source§

fn fg(&self, value: Color) -> Painted<&T>

Returns a styled value derived from self with the foreground set to value.

This method should be used rarely. Instead, prefer to use color-specific builder methods like red() and green(), which have the same functionality but are pithier.

Example

Set foreground color to white using fg():

use yansi::{Paint, Color};

painted.fg(Color::White);

Set foreground color to white using white().

use yansi::Paint;

painted.white();
source§

fn primary(&self) -> Painted<&T>

Returns self with the fg() set to Color::Primary.

Example
println!("{}", value.primary());
source§

fn fixed(&self, color: u8) -> Painted<&T>

Returns self with the fg() set to Color::Fixed.

Example
println!("{}", value.fixed(color));
source§

fn rgb(&self, r: u8, g: u8, b: u8) -> Painted<&T>

Returns self with the fg() set to Color::Rgb.

Example
println!("{}", value.rgb(r, g, b));
source§

fn black(&self) -> Painted<&T>

Returns self with the fg() set to Color::Black.

Example
println!("{}", value.black());
source§

fn red(&self) -> Painted<&T>

Returns self with the fg() set to Color::Red.

Example
println!("{}", value.red());
source§

fn green(&self) -> Painted<&T>

Returns self with the fg() set to Color::Green.

Example
println!("{}", value.green());
source§

fn yellow(&self) -> Painted<&T>

Returns self with the fg() set to Color::Yellow.

Example
println!("{}", value.yellow());
source§

fn blue(&self) -> Painted<&T>

Returns self with the fg() set to Color::Blue.

Example
println!("{}", value.blue());
source§

fn magenta(&self) -> Painted<&T>

Returns self with the fg() set to Color::Magenta.

Example
println!("{}", value.magenta());
source§

fn cyan(&self) -> Painted<&T>

Returns self with the fg() set to Color::Cyan.

Example
println!("{}", value.cyan());
source§

fn white(&self) -> Painted<&T>

Returns self with the fg() set to Color::White.

Example
println!("{}", value.white());
source§

fn bright_black(&self) -> Painted<&T>

Returns self with the fg() set to Color::BrightBlack.

Example
println!("{}", value.bright_black());
source§

fn bright_red(&self) -> Painted<&T>

Returns self with the fg() set to Color::BrightRed.

Example
println!("{}", value.bright_red());
source§

fn bright_green(&self) -> Painted<&T>

Returns self with the fg() set to Color::BrightGreen.

Example
println!("{}", value.bright_green());
source§

fn bright_yellow(&self) -> Painted<&T>

Returns self with the fg() set to Color::BrightYellow.

Example
println!("{}", value.bright_yellow());
source§

fn bright_blue(&self) -> Painted<&T>

Returns self with the fg() set to Color::BrightBlue.

Example
println!("{}", value.bright_blue());
source§

fn bright_magenta(&self) -> Painted<&T>

Returns self with the fg() set to Color::BrightMagenta.

Example
println!("{}", value.bright_magenta());
source§

fn bright_cyan(&self) -> Painted<&T>

Returns self with the fg() set to Color::BrightCyan.

Example
println!("{}", value.bright_cyan());
source§

fn bright_white(&self) -> Painted<&T>

Returns self with the fg() set to Color::BrightWhite.

Example
println!("{}", value.bright_white());
source§

fn bg(&self, value: Color) -> Painted<&T>

Returns a styled value derived from self with the background set to value.

This method should be used rarely. Instead, prefer to use color-specific builder methods like on_red() and on_green(), which have the same functionality but are pithier.

Example

Set background color to red using fg():

use yansi::{Paint, Color};

painted.bg(Color::Red);

Set background color to red using on_red().

use yansi::Paint;

painted.on_red();
source§

fn on_primary(&self) -> Painted<&T>

Returns self with the bg() set to Color::Primary.

Example
println!("{}", value.on_primary());
source§

fn on_fixed(&self, color: u8) -> Painted<&T>

Returns self with the bg() set to Color::Fixed.

Example
println!("{}", value.on_fixed(color));
source§

fn on_rgb(&self, r: u8, g: u8, b: u8) -> Painted<&T>

Returns self with the bg() set to Color::Rgb.

Example
println!("{}", value.on_rgb(r, g, b));
source§

fn on_black(&self) -> Painted<&T>

Returns self with the bg() set to Color::Black.

Example
println!("{}", value.on_black());
source§

fn on_red(&self) -> Painted<&T>

Returns self with the bg() set to Color::Red.

Example
println!("{}", value.on_red());
source§

fn on_green(&self) -> Painted<&T>

Returns self with the bg() set to Color::Green.

Example
println!("{}", value.on_green());
source§

fn on_yellow(&self) -> Painted<&T>

Returns self with the bg() set to Color::Yellow.

Example
println!("{}", value.on_yellow());
source§

fn on_blue(&self) -> Painted<&T>

Returns self with the bg() set to Color::Blue.

Example
println!("{}", value.on_blue());
source§

fn on_magenta(&self) -> Painted<&T>

Returns self with the bg() set to Color::Magenta.

Example
println!("{}", value.on_magenta());
source§

fn on_cyan(&self) -> Painted<&T>

Returns self with the bg() set to Color::Cyan.

Example
println!("{}", value.on_cyan());
source§

fn on_white(&self) -> Painted<&T>

Returns self with the bg() set to Color::White.

Example
println!("{}", value.on_white());
source§

fn on_bright_black(&self) -> Painted<&T>

Returns self with the bg() set to Color::BrightBlack.

Example
println!("{}", value.on_bright_black());
source§

fn on_bright_red(&self) -> Painted<&T>

Returns self with the bg() set to Color::BrightRed.

Example
println!("{}", value.on_bright_red());
source§

fn on_bright_green(&self) -> Painted<&T>

Returns self with the bg() set to Color::BrightGreen.

Example
println!("{}", value.on_bright_green());
source§

fn on_bright_yellow(&self) -> Painted<&T>

Returns self with the bg() set to Color::BrightYellow.

Example
println!("{}", value.on_bright_yellow());
source§

fn on_bright_blue(&self) -> Painted<&T>

Returns self with the bg() set to Color::BrightBlue.

Example
println!("{}", value.on_bright_blue());
source§

fn on_bright_magenta(&self) -> Painted<&T>

Returns self with the bg() set to Color::BrightMagenta.

Example
println!("{}", value.on_bright_magenta());
source§

fn on_bright_cyan(&self) -> Painted<&T>

Returns self with the bg() set to Color::BrightCyan.

Example
println!("{}", value.on_bright_cyan());
source§

fn on_bright_white(&self) -> Painted<&T>

Returns self with the bg() set to Color::BrightWhite.

Example
println!("{}", value.on_bright_white());
source§

fn attr(&self, value: Attribute) -> Painted<&T>

Enables the styling Attribute value.

This method should be used rarely. Instead, prefer to use attribute-specific builder methods like bold() and underline(), which have the same functionality but are pithier.

Example

Make text bold using attr():

use yansi::{Paint, Attribute};

painted.attr(Attribute::Bold);

Make text bold using using bold().

use yansi::Paint;

painted.bold();
source§

fn bold(&self) -> Painted<&T>

Returns self with the attr() set to Attribute::Bold.

Example
println!("{}", value.bold());
source§

fn dim(&self) -> Painted<&T>

Returns self with the attr() set to Attribute::Dim.

Example
println!("{}", value.dim());
source§

fn italic(&self) -> Painted<&T>

Returns self with the attr() set to Attribute::Italic.

Example
println!("{}", value.italic());
source§

fn underline(&self) -> Painted<&T>

Returns self with the attr() set to Attribute::Underline.

Example
println!("{}", value.underline());

Returns self with the attr() set to Attribute::Blink.

Example
println!("{}", value.blink());

Returns self with the attr() set to Attribute::RapidBlink.

Example
println!("{}", value.rapid_blink());
source§

fn invert(&self) -> Painted<&T>

Returns self with the attr() set to Attribute::Invert.

Example
println!("{}", value.invert());
source§

fn conceal(&self) -> Painted<&T>

Returns self with the attr() set to Attribute::Conceal.

Example
println!("{}", value.conceal());
source§

fn strike(&self) -> Painted<&T>

Returns self with the attr() set to Attribute::Strike.

Example
println!("{}", value.strike());
source§

fn quirk(&self, value: Quirk) -> Painted<&T>

Enables the yansi Quirk value.

This method should be used rarely. Instead, prefer to use quirk-specific builder methods like mask() and wrap(), which have the same functionality but are pithier.

Example

Enable wrapping using .quirk():

use yansi::{Paint, Quirk};

painted.quirk(Quirk::Wrap);

Enable wrapping using wrap().

use yansi::Paint;

painted.wrap();
source§

fn mask(&self) -> Painted<&T>

Returns self with the quirk() set to Quirk::Mask.

Example
println!("{}", value.mask());
source§

fn wrap(&self) -> Painted<&T>

Returns self with the quirk() set to Quirk::Wrap.

Example
println!("{}", value.wrap());
source§

fn linger(&self) -> Painted<&T>

Returns self with the quirk() set to Quirk::Linger.

Example
println!("{}", value.linger());
source§

fn clear(&self) -> Painted<&T>

Returns self with the quirk() set to Quirk::Clear.

Example
println!("{}", value.clear());
source§

fn bright(&self) -> Painted<&T>

Returns self with the quirk() set to Quirk::Bright.

Example
println!("{}", value.bright());
source§

fn on_bright(&self) -> Painted<&T>

Returns self with the quirk() set to Quirk::OnBright.

Example
println!("{}", value.on_bright());
source§

fn whenever(&self, value: Condition) -> Painted<&T>

Conditionally enable styling based on whether the Condition value applies. Replaces any previous condition.

See the crate level docs for more details.

Example

Enable styling painted only when both stdout and stderr are TTYs:

use yansi::{Paint, Condition};

painted.red().on_yellow().whenever(Condition::STDOUTERR_ARE_TTY);
source§

fn new(self) -> Painted<Self>where Self: Sized,

Create a new Painted with a default Style. Read more
source§

fn paint<S>(&self, style: S) -> Painted<&Self>where S: Into<Style>,

Apply a style wholesale to self. Any previous style is replaced. Read more
source§

impl<T> Same for T

§

type Output = T

Should always be Self
source§

impl<T> ToOwned for Twhere T: Clone,

§

type Owned = T

The resulting type after obtaining ownership.
source§

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
source§

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
source§

impl<T> ToString for Twhere T: Display + ?Sized,

source§

default fn to_string(&self) -> String

Converts the given value to a String. Read more
source§

impl<T, U> TryFrom<U> for Twhere U: Into<T>,

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
§

impl<V, T> VZip<V> for Twhere V: MultiLane<T>,

§

fn vzip(self) -> V

§

impl<T> WithSubscriber for T

§

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a [WithDispatch] wrapper. Read more
§

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more