neco-server-core 0.1.0

core http primitives for neco-server
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43

use std::any::{Any, TypeId};
use std::collections::HashMap;

/// Request-local typed extensions.
#[derive(Default)]
pub struct Extensions {
    entries: HashMap<TypeId, Box<dyn Any + Send + Sync>>,
}

impl Extensions {
    /// Creates an empty extensions map.
    pub fn new() -> Self {
        Self::default()
    }

    /// Inserts a typed value, replacing any previous value of the same type.
    pub fn insert<T>(&mut self, value: T)
    where
        T: Any + Send + Sync + 'static,
    {
        self.entries.insert(TypeId::of::<T>(), Box::new(value));
    }

    /// Returns a shared reference to a previously inserted typed value.
    pub fn get<T>(&self) -> Option<&T>
    where
        T: Any + Send + Sync + 'static,
    {
        self.entries
            .get(&TypeId::of::<T>())
            .and_then(|value| value.downcast_ref::<T>())
    }

    /// Returns a mutable reference to a previously inserted typed value.
    pub fn get_mut<T>(&mut self) -> Option<&mut T>
    where
        T: Any + Send + Sync + 'static,
    {
        self.entries
            .get_mut(&TypeId::of::<T>())
            .and_then(|value| value.downcast_mut::<T>())
    }
}