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
146
147
148
149

use std::future::Future;

use http::Method;
use http::Request;
use http::Response;
use http::Uri;
use tackt::route;
use tackt::Param;
use tower_service::Service;

fn create_router() -> impl Service<Request<()>, Error = Error, Response = Response<String>> {
    tackt::routes![home, login, user, content]
        .mount("/protected", tackt::routes![protected].with(protection))
}

#[test]
fn test() {
    let mut router = create_router();

    let res = oneshot(router.call(request(Method::GET, "/")));
    assert_eq!(res.map(Response::into_body), Ok("home".to_string()));

    let res = oneshot(router.call(request(Method::GET, "/login")));
    assert_eq!(res.map(Response::into_body), Ok("login".to_string()));

    let res = oneshot(router.call(request(Method::POST, "/login")));
    assert_eq!(res.map(Response::into_body), Ok("login".to_string()));

    let res = oneshot(router.call(request(Method::GET, "/user/1")));
    assert_eq!(res.map(Response::into_body), Ok("user 1".to_string()));

    let res = oneshot(router.call(request(Method::GET, "/content/1/name/path/to/file")));
    assert_eq!(
        res.map(Response::into_body),
        Ok("content 1 name path/to/file".to_string())
    );

    let res = oneshot(router.call(request(Method::GET, "/protected")));
    assert_eq!(res.map(Response::into_body), Err(Error::Unauthorized));

    let mut req = request(Method::GET, "/protected/");
    req.headers_mut()
        .insert("user", "someone".try_into().unwrap());
    let res = oneshot(router.call(req));
    assert_eq!(res.map(Response::into_body), Ok("someone".to_string()));
}

fn respond<S: Into<String>>(body: S) -> Response<String> {
    Response::new(body.into())
}

fn request(method: Method, path: &'static str) -> Request<()> {
    let mut req = Request::new(());
    *req.method_mut() = method;
    *req.uri_mut() = Uri::from_static(path);
    req
}

#[route]
async fn home(_: Request<()>) -> Result<Response<String>, Error> {
    Ok(respond("home"))
}

#[route(GET, POST: "login")]
async fn login(_: Request<()>) -> Result<Response<String>, Error> {
    Ok(respond("login"))
}

#[route(GET: "user" / id)]
async fn user(_: Request<()>, id: i32) -> Result<Response<String>, Error> {
    Ok(respond(format!("user {}", id)))
}

#[derive(Param)]
#[route(GET: "content" / id / name / path*)]
struct Content {
    id: i32,
    name: String,
    path: String,
}

async fn content(_: Request<()>, param: Content) -> Result<Response<String>, Error> {
    Ok(respond(format!(
        "content {} {} {}",
        param.id, param.name, param.path
    )))
}

#[route]
async fn protected(req: Request<()>) -> Result<Response<String>, Error> {
    let user = req.headers().get("user").unwrap().to_str().unwrap();
    Ok(respond(user))
}

async fn protection(req: Request<()>) -> Result<Request<()>, Error> {
    req.headers().get("user").ok_or(Error::Unauthorized)?;
    Ok(req)
}

#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord)]
enum Error {
    Routing(tackt::Error),
    Unauthorized,
}

impl std::error::Error for Error {}

impl std::fmt::Display for Error {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        match self {
            Error::Routing(err) => write!(f, "{err}"),
            Error::Unauthorized => write!(f, "unauthorized"),
        }
    }
}

impl From<tackt::Error> for Error {
    fn from(err: tackt::Error) -> Self {
        Error::Routing(err)
    }
}

struct Waker(std::thread::Thread);

impl Waker {
    fn new() -> std::sync::Arc<Waker> {
        std::sync::Arc::new(Waker(std::thread::current()))
    }
}

impl std::task::Wake for Waker {
    fn wake(self: std::sync::Arc<Self>) {
        self.0.unpark();
    }
}

fn oneshot<T>(fut: impl Future<Output = T>) -> T {
    use std::task::Context;
    use std::task::Poll;

    let mut fut = Box::pin(fut);
    let waker = Waker::new().into();
    let mut cx = Context::from_waker(&waker);

    match fut.as_mut().poll(&mut cx) {
        Poll::Ready(out) => out,
        Poll::Pending => panic!("still pending!!!"),
    }
}