xitca-web 0.2.2

an async web framework
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
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136

//! type extractor or application state.

use core::{borrow::Borrow, fmt, ops::Deref};

use crate::{body::BodyStream, context::WebContext, error::Error, handler::FromRequest};

/// App state extractor.
/// S type must be the same with the type passed to App::with_xxx_state(S).
pub struct StateRef<'a, S>(pub &'a S)
where
    S: ?Sized;

impl<S: fmt::Debug> fmt::Debug for StateRef<'_, S> {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "StateRef({:?})", self.0)
    }
}

impl<S: fmt::Display> fmt::Display for StateRef<'_, S> {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "StateRef({})", self.0)
    }
}

impl<S> Deref for StateRef<'_, S> {
    type Target = S;

    fn deref(&self) -> &Self::Target {
        self.0
    }
}

impl<'a, 'r, C, B, T> FromRequest<'a, WebContext<'r, C, B>> for StateRef<'a, T>
where
    C: Borrow<T>,
    B: BodyStream,
    T: ?Sized + 'static,
{
    type Type<'b> = StateRef<'b, T>;
    type Error = Error<C>;

    #[inline]
    async fn from_request(ctx: &'a WebContext<'r, C, B>) -> Result<Self, Self::Error> {
        Ok(StateRef(ctx.state().borrow()))
    }
}

/// App state extractor for owned value.
/// S type must be the same with the type passed to App::with_xxx_state(S).
pub struct StateOwn<S>(pub S);

impl<S: fmt::Debug> fmt::Debug for StateOwn<S> {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "StateOwn({:?})", self.0)
    }
}

impl<S: fmt::Display> fmt::Display for StateOwn<S> {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "StateOwn({})", self.0)
    }
}

impl<S> Deref for StateOwn<S> {
    type Target = S;

    fn deref(&self) -> &Self::Target {
        &self.0
    }
}

impl<'a, 'r, C, B, T> FromRequest<'a, WebContext<'r, C, B>> for StateOwn<T>
where
    C: Borrow<T>,
    B: BodyStream,
    T: Clone,
{
    type Type<'b> = StateOwn<T>;
    type Error = Error<C>;

    #[inline]
    async fn from_request(ctx: &'a WebContext<'r, C, B>) -> Result<Self, Self::Error> {
        Ok(StateOwn(ctx.state().borrow().clone()))
    }
}

#[cfg(test)]
mod test {
    use super::*;

    use xitca_codegen::State;
    use xitca_unsafe_collection::futures::NowOrPanic;

    use crate::{handler::handler_service, http::WebRequest, route::get, service::Service, App};

    #[derive(State, Clone, Debug, Eq, PartialEq)]
    struct State {
        #[borrow]
        field1: String,
        #[borrow]
        field2: u32,
    }

    async fn handler(
        StateRef(state): StateRef<'_, String>,
        StateRef(state2): StateRef<'_, u32>,
        StateRef(state3): StateRef<'_, State>,
        ctx: &WebContext<'_, State>,
    ) -> String {
        assert_eq!("state", state);
        assert_eq!(&996, state2);
        assert_eq!(state, ctx.state().field1.as_str());
        assert_eq!(state3, ctx.state());
        state.to_string()
    }

    #[test]
    fn state_extract() {
        let state = State {
            field1: String::from("state"),
            field2: 996,
        };

        App::new()
            .with_state(state)
            .at("/", get(handler_service(handler)))
            .finish()
            .call(())
            .now_or_panic()
            .ok()
            .unwrap()
            .call(WebRequest::default())
            .now_or_panic()
            .unwrap();
    }
}