tide 0.3.0

Serve the web – HTTP server 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
137
138
139
140
141

use http_service::Body;

pub type Response = http_service::Response;

/// Serialize `t` into a JSON-encoded response.
pub fn json<T: serde::Serialize>(t: T) -> Response {
    // TODO: remove the `unwrap`
    http::Response::builder()
        .status(http::status::StatusCode::OK)
        .header("Content-Type", "application/json")
        .body(Body::from(serde_json::to_vec(&t).unwrap()))
        .unwrap()
}

/// A value that is synchronously convertable into a `Response`.
pub trait IntoResponse: Send + Sized {
    /// Convert the value into a `Response`.
    fn into_response(self) -> Response;

    /// Create a new `IntoResponse` value that will respond with the given status code.
    ///
    /// ```
    /// # use tide::response::IntoResponse;
    /// let resp = "Hello, 404!".with_status(http::status::StatusCode::NOT_FOUND).into_response();
    /// assert_eq!(resp.status(), http::status::StatusCode::NOT_FOUND);
    /// ```
    fn with_status(self, status: http::status::StatusCode) -> WithStatus<Self> {
        WithStatus {
            inner: self,
            status,
        }
    }
}

impl IntoResponse for () {
    fn into_response(self) -> Response {
        http::Response::builder()
            .status(http::status::StatusCode::OK)
            .body(Body::empty())
            .unwrap()
    }
}

impl IntoResponse for Vec<u8> {
    fn into_response(self) -> Response {
        http::Response::builder()
            .status(http::status::StatusCode::OK)
            .header("Content-Type", "application/octet-stream")
            .body(Body::from(self))
            .unwrap()
    }
}

impl IntoResponse for String {
    fn into_response(self) -> Response {
        http::Response::builder()
            .status(http::status::StatusCode::OK)
            .header("Content-Type", "text/plain; charset=utf-8")
            .body(Body::from(self.into_bytes()))
            .unwrap()
    }
}

impl IntoResponse for &'_ str {
    fn into_response(self) -> Response {
        self.to_string().into_response()
    }
}

impl IntoResponse for http::status::StatusCode {
    fn into_response(self) -> Response {
        http::Response::builder()
            .status(self)
            .body(Body::empty())
            .unwrap()
    }
}

impl<T: IntoResponse, U: IntoResponse> IntoResponse for Result<T, U> {
    fn into_response(self) -> Response {
        match self {
            Ok(r) => r.into_response(),
            Err(r) => {
                let res = r.into_response();
                if res.status().is_success() {
                    panic!(
                        "Attempted to yield error response with success code {:?}",
                        res.status()
                    )
                }
                res
            }
        }
    }
}

impl<T: Send + Into<Body>> IntoResponse for http::Response<T> {
    fn into_response(self) -> Response {
        self.map(Into::into)
    }
}

/// A response type that modifies the status code.
#[derive(Debug)]
pub struct WithStatus<R> {
    inner: R,
    status: http::status::StatusCode,
}

impl<R: IntoResponse> IntoResponse for WithStatus<R> {
    fn into_response(self) -> Response {
        let mut resp = self.inner.into_response();
        *resp.status_mut() = self.status;
        resp
    }
}

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

    #[test]
    fn test_status() {
        let resp = "foo"
            .with_status(http::status::StatusCode::NOT_FOUND)
            .into_response();
        assert_eq!(resp.status(), http::status::StatusCode::NOT_FOUND);
    }

    #[test]
    fn byte_vec_content_type() {
        let resp = String::from("foo").into_bytes().into_response();
        assert_eq!(resp.headers()["Content-Type"], "application/octet-stream");
    }

    #[test]
    fn string_content_type() {
        let resp = String::from("foo").into_response();
        assert_eq!(resp.headers()["Content-Type"], "text/plain; charset=utf-8");
    }
}