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

use scoped_tls::scoped_thread_local;
use std::cell::RefCell;
use std::mem;
use std::net::SocketAddr;

use hyper::Body;

use crate::Request;

scoped_thread_local!(static ROUTE: RefCell<Route>);

pub(crate) fn set<F, U>(r: &RefCell<Route>, func: F) -> U
where
    F: FnOnce() -> U,
{
    ROUTE.set(r, func)
}

pub(crate) fn is_set() -> bool {
    ROUTE.is_set()
}

pub(crate) fn with<F, R>(func: F) -> R
where
    F: FnOnce(&mut Route) -> R,
{
    ROUTE.with(move |route| func(&mut *route.borrow_mut()))
}

#[derive(Debug)]
pub(crate) struct Route {
    body: BodyState,
    remote_addr: Option<SocketAddr>,
    req: Request,
    segments_index: usize,
}

#[derive(Debug)]
enum BodyState {
    Ready,
    Taken,
}

impl Route {
    pub(crate) fn new(req: Request, remote_addr: Option<SocketAddr>) -> RefCell<Route> {
        let segments_index = if req.uri().path().starts_with('/') {
            // Skip the beginning slash.
            1
        } else {
            0
        };

        RefCell::new(Route {
            body: BodyState::Ready,
            remote_addr,
            req,
            segments_index,
        })
    }

    pub(crate) fn method(&self) -> &http::Method {
        self.req.method()
    }

    pub(crate) fn headers(&self) -> &http::HeaderMap {
        self.req.headers()
    }

    pub(crate) fn version(&self) -> http::Version {
        self.req.version()
    }

    pub(crate) fn extensions(&self) -> &http::Extensions {
        self.req.extensions()
    }

    #[cfg(feature = "websocket")]
    pub(crate) fn extensions_mut(&mut self) -> &mut http::Extensions {
        self.req.extensions_mut()
    }

    pub(crate) fn uri(&self) -> &http::Uri {
        self.req.uri()
    }

    pub(crate) fn path(&self) -> &str {
        &self.req.uri().path()[self.segments_index..]
    }

    pub(crate) fn full_path(&self) -> &str {
        self.req.uri().path()
    }

    pub(crate) fn set_unmatched_path(&mut self, index: usize) {
        let index = self.segments_index + index;
        let path = self.req.uri().path();
        if path.is_empty() {
            // malformed path
            return;
        } else if path.len() == index {
            self.segments_index = index;
        } else {
            debug_assert_eq!(path.as_bytes()[index], b'/');
            self.segments_index = index + 1;
        }
    }

    pub(crate) fn query(&self) -> Option<&str> {
        self.req.uri().query()
    }

    pub(crate) fn matched_path_index(&self) -> usize {
        self.segments_index
    }

    pub(crate) fn reset_matched_path_index(&mut self, index: usize) {
        debug_assert!(
            index <= self.segments_index,
            "reset_match_path_index should not be bigger: current={}, arg={}",
            self.segments_index,
            index,
        );
        self.segments_index = index;
    }

    pub(crate) fn remote_addr(&self) -> Option<SocketAddr> {
        self.remote_addr
    }

    pub(crate) fn take_body(&mut self) -> Option<Body> {
        match self.body {
            BodyState::Ready => {
                let body = mem::replace(self.req.body_mut(), Body::empty());
                self.body = BodyState::Taken;
                Some(body)
            }
            BodyState::Taken => None,
        }
    }
}