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.

Methods

impl Extensions
[src]

Create an empty Extensions.

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));

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));

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");

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());

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 Default for Extensions
[src]

Returns the "default value" for a type. Read more

impl Debug for Extensions
[src]

Formats the value using the given formatter. Read more

Auto Trait Implementations

impl Send for Extensions

impl Sync for Extensions