pub struct HandlebarsHandler(/* private fields */);
Expand description

A trillium handler that provides registered templates to downsequence handlers

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impl HandlebarsHandler

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pub fn new(source: impl Into<Self>) -> Self

Builds a new trillium Handlebars handler from either a directory glob string or PathBuf or a handlebars::Handlebars<'static> instance

From a glob
use trillium_handlebars::{HandlebarsHandler, HandlebarsConnExt};
let handler = (
    HandlebarsHandler::new("**/*.hbs"),
    |mut conn: trillium::Conn| async move {
        conn.assign("name", "handlebars")
            .render("examples/templates/hello.hbs")
    }
);

use trillium_testing::prelude::*;
assert_ok!(get("/").on(&handler), "hello handlebars!");
From a handlebars::Handlebars
use trillium_handlebars::{HandlebarsHandler, Handlebars, HandlebarsConnExt};
// building a Handlebars directly
let mut handlebars = Handlebars::new();
handlebars.register_template_string("greet-user", "Hello {{name}}")?;
let handler = (
    HandlebarsHandler::new(handlebars),
    |mut conn: trillium::Conn| async move {
        conn.assign("name", "handlebars")
            .render("greet-user")
    }
);

use trillium_testing::prelude::*;
assert_ok!(get("/").on(&handler), "Hello handlebars");

Trait Implementations§

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impl Clone for HandlebarsHandler

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fn clone(&self) -> HandlebarsHandler

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for HandlebarsHandler

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

Formats the value using the given formatter. Read more
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impl Default for HandlebarsHandler

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fn default() -> HandlebarsHandler

Returns the “default value” for a type. Read more
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impl From<&str> for HandlebarsHandler

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fn from(pattern: &str) -> Self

Converts to this type from the input type.
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impl From<Registry<'static>> for HandlebarsHandler

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fn from(ah: Handlebars<'static>) -> Self

Converts to this type from the input type.
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impl From<PathBuf> for HandlebarsHandler

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fn from(path: PathBuf) -> Self

Converts to this type from the input type.
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impl Handler for HandlebarsHandler

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fn run<'life0, 'async_trait>( &'life0 self, conn: Conn ) -> Pin<Box<dyn Future<Output = Conn> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Executes this handler, performing any modifications to the Conn that are desired.
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fn init<'life0, 'life1, 'async_trait>( &'life0 mut self, _info: &'life1 mut Info ) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, Self: 'async_trait,

Performs one-time async set up on a mutable borrow of the Handler before the server starts accepting requests. This allows a Handler to be defined in synchronous code but perform async setup such as establishing a database connection or fetching some state from an external source. This is optional, and chances are high that you do not need this. Read more
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fn before_send<'life0, 'async_trait>( &'life0 self, conn: Conn ) -> Pin<Box<dyn Future<Output = Conn> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Performs any final modifications to this conn after all handlers have been run. Although this is a slight deviation from the simple conn->conn->conn chain represented by most Handlers, it provides an easy way for libraries to effectively inject a second handler into a response chain. This is useful for loggers that need to record information both before and after other handlers have run, as well as database transaction handlers and similar library code. Read more
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fn has_upgrade(&self, _upgrade: &Upgrade<BoxedTransport>) -> bool

predicate function answering the question of whether this Handler would like to take ownership of the negotiated Upgrade. If this returns true, you must implement [Handler::upgrade]. The first handler that responds true to this will receive ownership of the [trillium::Upgrade][crate::Upgrade] in a subsequent call to [Handler::upgrade]
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fn upgrade<'life0, 'async_trait>( &'life0 self, _upgrade: Upgrade<BoxedTransport> ) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

This will only be called if the handler reponds true to [Handler::has_upgrade] and will only be called once for this upgrade. There is no return value, and this function takes exclusive ownership of the underlying transport once this is called. You can downcast the transport to whatever the source transport type is and perform any non-http protocol communication that has been negotiated. You probably don’t want this unless you’re implementing something like websockets. Please note that for many transports such as TcpStreams, dropping the transport (and therefore the Upgrade) will hang up / disconnect.
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fn name(&self) -> Cow<'static, str>

Customize the name of your handler. This is used in Debug implementations. The default is the type name of this handler.

Auto Trait Implementations§

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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fn into(self) -> U

Calls U::from(self).

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

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.