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
|
//! Provides the [`Parts`] and [`Body`] convenience wrappers.
use cookie::Cookie;
use header::CONTENT_TYPE;
use mime::{APPLICATION_WWW_FORM_URLENCODED, Mime};
use serde::{Deserialize, de::DeserializeOwned};
use hyper::{body::Bytes, header};
use hyper::http::request::Parts as ReqParts;
use std::collections::HashMap;
use crate::{Error, security};
type HyperRequest = hyper::Request<hyper::Body>;
/// Convenience wrapper around [`hyper::Body`].
pub struct Body {
body: hyper::Body,
content_type: Option<header::HeaderValue>,
}
/// Convert [`hyper::Request`] to ([`Parts`], [`Body`])
pub fn adapt<'a>(req: HyperRequest) -> (Parts, Body) {
let (parts, body) = req.into_parts();
let body = Body{body, content_type: parts.headers.get(CONTENT_TYPE).map(|x| x.to_owned())};
let parts = Parts{parts, cookies: None};
(parts, body)
}
/// Convenience wrapper around [`hyper::http::request::Parts`].
pub struct Parts {
parts: ReqParts,
cookies: Option<HashMap<String,Cookie<'static>>>,
}
#[derive(Deserialize)]
struct CsrfData {
csrf: String,
}
impl Parts {
pub fn cookies(&mut self) -> &HashMap<String,Cookie> {
if let Some(ref cookies) = self.cookies {
return cookies
}
let mut cookies = HashMap::new();
for header in self.parts.headers.get_all(header::COOKIE) {
let raw_str = match std::str::from_utf8(header.as_bytes()) {
Ok(string) => string,
Err(_) => continue
};
for cookie_str in raw_str.split(';').map(|s| s.trim()) {
if let Ok(cookie) = Cookie::parse_encoded(cookie_str) {
cookies.insert(cookie.name().to_string(), cookie.into_owned());
}
}
}
self.cookies = Some(cookies);
&self.cookies.as_ref().unwrap()
}
pub fn method(&self) -> &hyper::Method {
&self.parts.method
}
pub fn headers(&self) -> &hyper::HeaderMap<header::HeaderValue> {
&self.parts.headers
}
pub fn uri(&self) -> &hyper::Uri {
&self.parts.uri
}
/// Parses the query string of the request into a given struct.
pub fn query<T: DeserializeOwned>(&self) -> Result<T,Error> {
serde_urlencoded::from_str::<T>(self.parts.uri.query().unwrap_or("")).map_err(|e|Error::bad_request(e.to_string()))
}
}
impl Body {
pub async fn into_bytes(self) -> Result<Bytes,Error> {
hyper::body::to_bytes(self.body).await.map_err(|_|Error::internal("failed to read body".to_string()))
}
/// Parses a `application/x-www-form-urlencoded` request body into a given struct.
///
/// This does make you vulnerable to CSRF, so you normally want to use
/// [`Body::into_form_csrf()`] instead.
///
/// # Example
///
/// ```
/// use hyper::{Response};
/// use sputnik::{request::Body, Error};
/// use serde::Deserialize;
///
/// #[derive(Deserialize)]
/// struct Message {text: String, year: i64}
///
/// async fn greet(body: Body) -> Result<Response<hyper::Body>, Error> {
/// let msg: Message = body.into_form().await?;
/// Ok(Response::new(format!("hello {}", msg.text).into()))
/// }
/// ```
pub async fn into_form<T: DeserializeOwned>(self) -> Result<T,Error> {
self.enforce_content_type(APPLICATION_WWW_FORM_URLENCODED)?;
let full_body = self.into_bytes().await?;
serde_urlencoded::from_bytes::<T>(&full_body).map_err(|e|Error::bad_request(e.to_string()))
}
/// Parses a `application/x-www-form-urlencoded` request body into a given struct.
/// Protects from CSRF by checking that the request body contains the same token retrieved from the cookies.
///
/// The CSRF parameter is expected as the `csrf` parameter in the request body.
/// This means for HTML forms you need to embed the token as a hidden input.
///
/// # Example
///
/// ```
/// use hyper::{Method};
/// use sputnik::{request::{Parts, Body}, response::Response, Error};
/// use sputnik::security::CsrfToken;
/// use serde::Deserialize;
///
/// #[derive(Deserialize)]
/// struct Message {text: String}
///
/// async fn greet(req: &mut Parts, body: Body) -> Result<Response, Error> {
/// let mut response = Response::new();
/// let csrf_token = CsrfToken::from_parts(req, &mut response);
/// *response.body() = match (req.method()) {
/// &Method::GET => format!("<form method=post>
/// <input name=text>{}<button>Submit</button></form>", csrf_token.html_input()).into(),
/// &Method::POST => {
/// let msg: Message = body.into_form_csrf(&csrf_token).await?;
/// format!("hello {}", msg.text).into()
/// },
/// _ => return Err(Error::method_not_allowed("only GET and POST allowed".to_owned())),
/// };
/// Ok(response)
/// }
/// ```
pub async fn into_form_csrf<T: DeserializeOwned>(self, csrf_token: &security::CsrfToken) -> Result<T,Error> {
self.enforce_content_type(APPLICATION_WWW_FORM_URLENCODED)?;
let full_body = self.into_bytes().await?;
let csrf_data = serde_urlencoded::from_bytes::<CsrfData>(&full_body).map_err(|_|Error::bad_request("no csrf token".to_string()))?;
csrf_token.matches(csrf_data.csrf)?;
serde_urlencoded::from_bytes::<T>(&full_body).map_err(|e|Error::bad_request(e.to_string()))
}
fn enforce_content_type(&self, mime: Mime) -> Result<(),Error> {
if let Some(content_type) = &self.content_type {
if *content_type == mime.to_string() {
return Ok(())
}
}
Err(Error::bad_request(format!("expected content-type: {}", mime)))
}
}
|
