Struct http::Extensions[][src]

pub struct Extensions { /* fields omitted */ }

A type map of protocol extensions.

Extensions can be used by Request and Response to store extra data derived from the underlying protocol.

Implementations

impl Extensions[src]

pub fn new() -> Extensions[src]

Create an empty Extensions.

pub fn insert<T: Send + Sync + 'static>(&mut self, val: T) -> Option<T>[src]

Insert a type into this Extensions.

If a extension of this type already existed, it will be returned.

Example

let mut ext = Extensions::new();
assert!(ext.insert(5i32).is_none());
assert!(ext.insert(4u8).is_none());
assert_eq!(ext.insert(9i32), Some(5i32));

pub fn get<T: Send + Sync + 'static>(&self) -> Option<&T>[src]

Get a reference to a type previously inserted on this Extensions.

Example

let mut ext = Extensions::new();
assert!(ext.get::<i32>().is_none());
ext.insert(5i32);

assert_eq!(ext.get::<i32>(), Some(&5i32));

pub fn get_mut<T: Send + Sync + 'static>(&mut self) -> Option<&mut T>[src]

Get a mutable reference to a type previously inserted on this Extensions.

Example

let mut ext = Extensions::new();
ext.insert(String::from("Hello"));
ext.get_mut::<String>().unwrap().push_str(" World");

assert_eq!(ext.get::<String>().unwrap(), "Hello World");

pub fn remove<T: Send + Sync + 'static>(&mut self) -> Option<T>[src]

Remove a type from this Extensions.

If a extension of this type existed, it will be returned.

Example

let mut ext = Extensions::new();
ext.insert(5i32);
assert_eq!(ext.remove::<i32>(), Some(5i32));
assert!(ext.get::<i32>().is_none());

pub fn clear(&mut self)[src]

Clear the Extensions of all inserted extensions.

Example

let mut ext = Extensions::new();
ext.insert(5i32);
ext.clear();

assert!(ext.get::<i32>().is_none());

Trait Implementations

impl Debug for Extensions[src]

impl Default for Extensions[src]

Auto Trait Implementations

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
[src]

impl<T> Borrow<T> for T where
    T: ?Sized
[src]

impl<T> BorrowMut<T> for T where
    T: ?Sized
[src]

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
[src]

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
[src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
[src]

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

The type returned in the event of a conversion error.