tackt 0.1.2

HTTP router
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
137
138
139
140
141
142
143
144
145

use tower_service::Service;

use crate::error::Error;
use crate::future::Maybe;
use crate::request::PathReq;
use crate::request::RemovePrefix;
use crate::route::Route;

/// Mount a Service.
///
/// Note that application code cannot construct this struct directly. This is
/// exported for type annotation only.
#[derive(Clone, Copy, Debug)]
pub struct Mount<S> {
    inner: S,
    prefix: &'static str,
}

impl<S> Mount<S> {
    #[inline]
    pub(crate) fn new<T>(inner: S, prefix: &'static str) -> Mount<S>
    where
        S: Service<T>,
        T: PathReq + RemovePrefix,
        S::Error: From<Error>,
    {
        Mount { inner, prefix }
    }
}

impl<S, T> Service<T> for Mount<S>
where
    S: Service<T>,
    T: PathReq + RemovePrefix,
    S::Error: From<Error>,
{
    type Response = S::Response;

    type Error = S::Error;

    type Future = Maybe<S::Future, Result<Self::Response, Self::Error>>;

    #[inline]
    fn poll_ready(
        &mut self,
        _: &mut std::task::Context<'_>,
    ) -> std::task::Poll<Result<(), Self::Error>> {
        std::task::Poll::Ready(Ok(()))
    }

    fn call(&mut self, req: T) -> Self::Future {
        match req.remove_prefix(self.prefix) {
            Err(err) => Maybe::ready(Err(err.into())),
            Ok(req) => Maybe::Future(self.inner.call(req)),
        }
    }
}

impl<S, T> Route<T> for Mount<S>
where
    S: Service<T>,
    T: PathReq + RemovePrefix,
    S::Error: From<Error>,
{
    type Param = Param;

    fn call_with_param(&mut self, req: T, _: Self::Param) -> Self::Future {
        self.call(req)
    }

    fn param(&self, req: &T) -> Result<Self::Param, Error> {
        match req.path().starts_with(self.prefix) {
            true => Ok(Param),
            false => Err(Error::Path),
        }
    }
}

#[derive(Clone, Copy, Debug)]
pub struct Param;

impl<T> crate::param::Param<T> for Param {
    fn from_request(_: &T) -> Result<Self, Error> {
        Ok(Param)
    }
}

#[cfg(test)]
mod tests {
    use http::Request;

    use crate::error::Error;
    use crate::exec::run;
    use crate::macros::param;
    use crate::router::Router;

    param!(Root, GET, "/");
    param!(Route1, GET, "/route1");
    param!(Route2, GET, "/route2");
    param!(Other, GET, "/other");

    async fn root(_: Request<()>, _: Root) -> Result<&'static str, Error> {
        Ok("root")
    }

    async fn route1(_: Request<()>, _: Route1) -> Result<&'static str, Error> {
        Ok("route1")
    }

    async fn route2(_: Request<()>, _: Route2) -> Result<&'static str, Error> {
        Ok("route2")
    }

    async fn other(_: Request<()>, _: Other) -> Result<&'static str, Error> {
        Ok("other")
    }

    fn req(path: &'static str) -> Request<()> {
        Request::builder()
            .method(http::Method::GET)
            .uri(http::Uri::from_static(path))
            .body(())
            .unwrap()
    }

    #[test]
    fn test() {
        let root = Router::new(root).route(other);
        let r1 = Router::new(route1);
        let r2 = Router::new(route2);
        let router = root.mount("/r1", r1).mount("/r2", r2);

        let res = run(router, req("/"));
        assert_eq!(res, Ok("root"));

        let res = run(router, req("/other"));
        assert_eq!(res, Ok("other"));

        let res = run(router, req("/r1/route1"));
        assert_eq!(res, Ok("route1"));

        let res = run(router, req("/r2/route2"));
        assert_eq!(res, Ok("route2"));
    }
}