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
use std::ops::{Deref, DerefMut};
use serde::de::DeserializeOwned;
use crate::{
error::ParseFormError,
http::{
header::{self, HeaderValue},
Method,
},
web::RequestBody,
FromRequest, Request, Result,
};
pub struct Form<T>(pub T);
impl<T> Deref for Form<T> {
type Target = T;
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl<T> DerefMut for Form<T> {
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.0
}
}
#[async_trait::async_trait]
impl<'a, T: DeserializeOwned> FromRequest<'a> for Form<T> {
type Error = ParseFormError;
async fn from_request(req: &'a Request, body: &mut RequestBody) -> Result<Self, Self::Error> {
if req.method() == Method::GET {
Ok(serde_urlencoded::from_str(req.uri().query().unwrap_or_default()).map(Self)?)
} else {
let content_type = req.headers().get(header::CONTENT_TYPE);
if content_type
!= Some(&HeaderValue::from_static(
"application/x-www-form-urlencoded",
))
{
return match content_type.and_then(|value| value.to_str().ok()) {
Some(ty) => Err(ParseFormError::InvalidContentType(ty.to_string())),
None => Err(ParseFormError::ContentTypeRequired),
};
}
Ok(Self(serde_urlencoded::from_bytes(
&body.take()?.into_bytes().await?,
)?))
}
}
}
#[cfg(test)]
mod tests {
use serde::Deserialize;
use super::*;
use crate::{
handler,
http::{StatusCode, Uri},
Endpoint,
};
#[tokio::test]
async fn test_form_extractor() {
#[derive(Deserialize)]
struct CreateResource {
name: String,
value: i32,
}
#[handler(internal)]
async fn index(form: Form<CreateResource>) {
assert_eq!(form.name, "abc");
assert_eq!(form.value, 100);
}
index
.call(
Request::builder()
.uri(Uri::from_static("/?name=abc&value=100"))
.finish(),
)
.await;
index
.call(
Request::builder()
.method(Method::POST)
.header(header::CONTENT_TYPE, "application/x-www-form-urlencoded")
.body("name=abc&value=100"),
)
.await;
let resp = index
.call(
Request::builder()
.method(Method::POST)
.header(header::CONTENT_TYPE, "application/json")
.body("name=abc&value=100"),
)
.await;
assert_eq!(resp.status(), StatusCode::BAD_REQUEST);
}
}