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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
//! Contains types that set the status code and corresponding headers of a
//! response.
//!
//! These types are designed to make it easier to respond correctly with a given
//! status code. Each type takes in the minimum number of parameters required to
//! construct a proper response with that status code. Some types take in
//! responders; when they do, the responder finalizes the response by writing
//! out additional headers and, importantly, the body of the response.

use std::hash::{Hash, Hasher};
use std::collections::hash_map::DefaultHasher;

use request::Request;
use response::{Responder, Response};
use http::hyper::header;
use http::Status;

/// Sets the status of the response to 201 (Created).
///
/// The `String` field is set as the value of the `Location` header in the
/// response. The optional `Responder` field is used to finalize the response.
///
/// # Example
///
/// ```rust
/// use rocket::response::status;
///
/// let url = "http://myservice.com/resource.json".to_string();
/// let content = "{ 'resource': 'Hello, world!' }";
/// # #[allow(unused_variables)]
/// let response = status::Created(url, Some(content));
/// ```
#[derive(Debug, Clone, PartialEq)]
pub struct Created<R>(pub String, pub Option<R>);

/// Sets the status code of the response to 201 Created. Sets the `Location`
/// header to the `String` parameter in the constructor.
///
/// The optional responder finalizes the response if it exists. The wrapped
/// responder should write the body of the response so that it contains
/// information about the created resource. If no responder is provided, the
/// response body will be empty.
impl<'r, R: Responder<'r>> Responder<'r> for Created<R> {
    default fn respond_to(self, req: &Request) -> Result<Response<'r>, Status> {
        let mut build = Response::build();
        if let Some(responder) = self.1 {
            build.merge(responder.respond_to(req)?);
        }

        build.status(Status::Created).header(header::Location(self.0)).ok()
    }
}

/// In addition to setting the status code, `Location` header, and finalizing
/// the response with the `Responder`, the `ETag` header is set conditionally if
/// a `Responder` is provided that implements `Hash`. The `ETag` header is set
/// to a hash value of the responder.
impl<'r, R: Responder<'r> + Hash> Responder<'r> for Created<R> {
    fn respond_to(self, req: &Request) -> Result<Response<'r>, Status> {
        let mut hasher = DefaultHasher::default();
        let mut build = Response::build();
        if let Some(responder) = self.1 {
            responder.hash(&mut hasher);
            let hash = hasher.finish().to_string();

            build.merge(responder.respond_to(req)?);
            build.header(header::ETag(header::EntityTag::strong(hash)));
        }

        build.status(Status::Created).header(header::Location(self.0)).ok()
    }
}

/// Sets the status of the response to 202 (Accepted).
///
/// If a responder is supplied, the remainder of the response is delegated to
/// it. If there is no responder, the body of the response will be empty.
///
/// # Examples
///
/// A 202 Accepted response without a body:
///
/// ```rust
/// use rocket::response::status;
///
/// # #[allow(unused_variables)]
/// let response = status::Accepted::<()>(None);
/// ```
///
/// A 202 Accepted response _with_ a body:
///
/// ```rust
/// use rocket::response::status;
///
/// # #[allow(unused_variables)]
/// let response = status::Accepted(Some("processing"));
/// ```
#[derive(Debug, Clone, PartialEq)]
pub struct Accepted<R>(pub Option<R>);

/// Sets the status code of the response to 202 Accepted. If the responder is
/// `Some`, it is used to finalize the response.
impl<'r, R: Responder<'r>> Responder<'r> for Accepted<R> {
    fn respond_to(self, req: &Request) -> Result<Response<'r>, Status> {
        let mut build = Response::build();
        if let Some(responder) = self.0 {
            build.merge(responder.respond_to(req)?);
        }

        build.status(Status::Accepted).ok()
    }
}

/// Sets the status of the response to 204 (No Content).
///
/// The response body will be empty.
///
/// # Example
///
/// A 204 No Content response:
///
/// ```rust
/// use rocket::response::status;
///
/// # #[allow(unused_variables)]
/// let response = status::NoContent;
/// ```
#[derive(Debug, Clone, PartialEq)]
pub struct NoContent;

/// Sets the status code of the response to 204 No Content.
impl<'r> Responder<'r> for NoContent {
    fn respond_to(self, _: &Request<'_>) -> Result<Response<'r>, Status> {
        let mut build = Response::build();
        build.status(Status::NoContent).ok()
    }
}

/// Sets the status of the response to 400 (Bad Request).
///
/// If a responder is supplied, the remainder of the response is delegated to
/// it. If there is no responder, the body of the response will be empty.
///
/// # Examples
///
/// A 400 Bad Request response without a body:
///
/// ```rust
/// use rocket::response::status;
///
/// # #[allow(unused_variables)]
/// let response = status::BadRequest::<()>(None);
/// ```
///
/// A 400 Bad Request response _with_ a body:
///
/// ```rust
/// use rocket::response::status;
///
/// # #[allow(unused_variables)]
/// let response = status::BadRequest(Some("error message"));
/// ```
#[derive(Debug, Clone, PartialEq)]
pub struct BadRequest<R>(pub Option<R>);

/// Sets the status code of the response to 400 Bad Request. If the responder is
/// `Some`, it is used to finalize the response.
impl<'r, R: Responder<'r>> Responder<'r> for BadRequest<R> {
    fn respond_to(self, req: &Request) -> Result<Response<'r>, Status> {
        let mut build = Response::build();
        if let Some(responder) = self.0 {
            build.merge(responder.respond_to(req)?);
        }

        build.status(Status::BadRequest).ok()
    }
}

/// Sets the status of the response to 401 (Unauthorized).
///
/// If a responder is supplied, the remainder of the response is delegated to
/// it. If there is no responder, the body of the response will be empty.
///
/// # Examples
///
/// A 401 Unauthorized response without a body:
///
/// ```rust
/// use rocket::response::status;
///
/// # #[allow(unused_variables)]
/// let response = status::Unauthorized::<()>(None);
/// ```
///
/// A 401 Unauthorized response _with_ a body:
///
/// ```rust
/// use rocket::response::status;
///
/// # #[allow(unused_variables)]
/// let response = status::Unauthorized(Some("error message"));
/// ```
#[derive(Debug, Clone, PartialEq)]
pub struct Unauthorized<R>(pub Option<R>);

/// Sets the status code of the response to 401 Unauthorized. If the responder is
/// `Some`, it is used to finalize the response.
impl<'r, R: Responder<'r>> Responder<'r> for Unauthorized<R> {
    fn respond_to(self, req: &Request<'_>) -> Result<Response<'r>, Status> {
        let mut build = Response::build();
        if let Some(responder) = self.0 {
            build.merge(responder.respond_to(req)?);
        }

        build.status(Status::Unauthorized).ok()
    }
}

/// Sets the status of the response to 403 (Forbidden).
///
/// If a responder is supplied, the remainder of the response is delegated to
/// it. If there is no responder, the body of the response will be empty.
///
/// # Examples
///
/// A 403 Forbidden response without a body:
///
/// ```rust
/// use rocket::response::status;
///
/// # #[allow(unused_variables)]
/// let response = status::Forbidden::<()>(None);
/// ```
///
/// A 403 Forbidden response _with_ a body:
///
/// ```rust
/// use rocket::response::status;
///
/// # #[allow(unused_variables)]
/// let response = status::Forbidden(Some("error message"));
/// ```
#[derive(Debug, Clone, PartialEq)]
pub struct Forbidden<R>(pub Option<R>);

/// Sets the status code of the response to 403 Forbidden. If the responder is
/// `Some`, it is used to finalize the response.
impl<'r, R: Responder<'r>> Responder<'r> for Forbidden<R> {
    fn respond_to(self, req: &Request<'_>) -> Result<Response<'r>, Status> {
        let mut build = Response::build();
        if let Some(responder) = self.0 {
            build.merge(responder.respond_to(req)?);
        }

        build.status(Status::Forbidden).ok()
    }
}

/// Sets the status of the response to 404 (Not Found).
///
/// The remainder of the response is delegated to the wrapped `Responder`.
///
/// # Example
///
/// ```rust
/// use rocket::response::status;
///
/// # #[allow(unused_variables)]
/// let response = status::NotFound("Sorry, I couldn't find it!");
/// ```
#[derive(Debug, Clone, PartialEq)]
pub struct NotFound<R>(pub R);

/// Sets the status code of the response to 404 Not Found.
impl<'r, R: Responder<'r>> Responder<'r> for NotFound<R> {
    fn respond_to(self, req: &Request) -> Result<Response<'r>, Status> {
        Response::build_from(self.0.respond_to(req)?)
            .status(Status::NotFound)
            .ok()
    }
}


/// Sets the status of the response to 409 (Conflict).
///
/// If a responder is supplied, the remainder of the response is delegated to
/// it. If there is no responder, the body of the response will be empty.
///
/// # Examples
///
/// A 409 Conflict response without a body:
///
/// ```rust
/// use rocket::response::status;
///
/// # #[allow(unused_variables)]
/// let response = status::Conflict::<()>(None);
/// ```
///
/// A 409 Conflict response _with_ a body:
///
/// ```rust
/// use rocket::response::status;
///
/// # #[allow(unused_variables)]
/// let response = status::Conflict(Some("error message"));
/// ```
#[derive(Debug, Clone, PartialEq)]
pub struct Conflict<R>(pub Option<R>);

/// Sets the status code of the response to 409 Conflict. If the responder is
/// `Some`, it is used to finalize the response.
impl<'r, R: Responder<'r>> Responder<'r> for Conflict<R> {
    fn respond_to(self, req: &Request<'_>) -> Result<Response<'r>, Status> {
        let mut build = Response::build();
        if let Some(responder) = self.0 {
            build.merge(responder.respond_to(req)?);
        }

        build.status(Status::Conflict).ok()
    }
}

/// Creates a response with the given status code and underlying responder.
///
/// # Example
///
/// ```rust
/// use rocket::response::status;
/// use rocket::http::Status;
///
/// # #[allow(unused_variables)]
/// let response = status::Custom(Status::ImATeapot, "Hi!");
/// ```
#[derive(Debug, Clone, PartialEq)]
pub struct Custom<R>(pub Status, pub R);

/// Sets the status code of the response and then delegates the remainder of the
/// response to the wrapped responder.
impl<'r, R: Responder<'r>> Responder<'r> for Custom<R> {
    fn respond_to(self, req: &Request) -> Result<Response<'r>, Status> {
        Response::build_from(self.1.respond_to(req)?)
            .status(self.0)
            .ok()
    }
}

// The following are unimplemented.
// 206 Partial Content (variant), 203 Non-Authoritative Information (headers).