ullun/
response.rs

1//! Response types and builders
2
3use crate::cookies::Cookie;
4use crate::error::Error;
5use bytes::Bytes;
6use http::StatusCode;
7use serde::Serialize;
8
9/// HTTP Response wrapper
10pub struct Response {
11    pub status: StatusCode,
12    pub headers: http::HeaderMap,
13    pub body: Bytes,
14    cookies: Vec<Cookie>,
15}
16
17impl Response {
18    pub fn new(status: StatusCode) -> Self {
19        Self {
20            status,
21            headers: http::HeaderMap::new(),
22            body: Bytes::new(),
23            cookies: Vec::new(),
24        }
25    }
26
27    /// Set a cookie
28    pub fn cookie(mut self, cookie: Cookie) -> Self {
29        self.cookies.push(cookie);
30        self
31    }
32
33    pub fn ok() -> Self {
34        Self::new(StatusCode::OK)
35    }
36
37    pub fn with_status(mut self, status: StatusCode) -> Self {
38        self.status = status;
39        self
40    }
41
42    pub fn with_body(mut self, body: impl Into<Bytes>) -> Self {
43        self.body = body.into();
44        self
45    }
46
47    pub fn with_header(mut self, key: impl Into<String>, value: impl Into<String>) -> Self {
48        let key = key.into();
49        let value = value.into();
50
51        // Validate and insert header, skip invalid ones
52        if let (Ok(header_name), Ok(header_value)) = (
53            http::HeaderName::from_bytes(key.as_bytes()),
54            http::HeaderValue::from_str(&value),
55        ) {
56            self.headers.insert(header_name, header_value);
57        } else {
58            eprintln!("Warning: Invalid header {}={}", key, value);
59        }
60        self
61    }
62
63    pub fn json<T: Serialize>(data: T) -> Self {
64        match serde_json::to_vec(&data) {
65            Ok(body) => Self::ok()
66                .with_header("content-type", "application/json")
67                .with_body(body),
68            Err(e) => {
69                eprintln!("JSON serialization error: {}", e);
70                Self::new(StatusCode::INTERNAL_SERVER_ERROR)
71                    .with_header("content-type", "application/json")
72                    .with_body("{\"error\":\"Internal serialization error\"}")
73            }
74        }
75    }
76
77    pub fn text(text: impl Into<String>) -> Self {
78        Self::ok()
79            .with_header("content-type", "text/plain")
80            .with_body(text.into())
81    }
82
83    /// `200 OK` with an HTML body
84    pub fn html(html: impl Into<String>) -> Self {
85        Self::ok()
86            .with_header("content-type", "text/html; charset=utf-8")
87            .with_body(html.into())
88    }
89
90    /// `303 See Other`, the right answer after a form POST (Post/Redirect/Get)
91    pub fn redirect(location: impl Into<String>) -> Self {
92        Self::new(StatusCode::SEE_OTHER).with_header("location", location)
93    }
94
95    /// `308 Permanent Redirect`, keeps method and body
96    pub fn redirect_permanent(location: impl Into<String>) -> Self {
97        Self::new(StatusCode::PERMANENT_REDIRECT).with_header("location", location)
98    }
99
100    pub fn from_error(error: Error) -> Self {
101        let status = error.status();
102        let body = serde_json::json!({
103            "error": error.message(),
104            "status": error.status_code(),
105        });
106        let body_bytes =
107            serde_json::to_vec(&body).unwrap_or_else(|_| b"{\"error\":\"Unknown error\"}".to_vec());
108        Self::new(status)
109            .with_header("content-type", "application/json")
110            .with_body(body_bytes)
111    }
112
113    pub(crate) fn into_hyper(self) -> hyper::Response<http_body_util::Full<Bytes>> {
114        let mut builder = hyper::Response::builder().status(self.status);
115
116        for (key, value) in self.headers.iter() {
117            builder = builder.header(key, value);
118        }
119
120        // Add Set-Cookie headers
121        for cookie in self.cookies {
122            builder = builder.header("set-cookie", cookie.to_header_value());
123        }
124
125        builder
126            .body(http_body_util::Full::new(self.body))
127            .unwrap_or_else(|e| {
128                eprintln!("Failed to build response: {}", e);
129                hyper::Response::builder()
130                    .status(StatusCode::INTERNAL_SERVER_ERROR)
131                    .body(http_body_util::Full::new(Bytes::from(
132                        "Internal Server Error",
133                    )))
134                    .unwrap()
135            })
136    }
137}
138
139/// JSON response helper
140pub struct Json<T>(pub T);
141
142impl<T: Serialize> From<Json<T>> for Response {
143    fn from(json: Json<T>) -> Self {
144        Response::json(json.0)
145    }
146}
ullun/response.rs

ullun/
response.rs
