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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
//! Implementation of cookie creation and matching as specified by
//! http://tools.ietf.org/html/rfc6265
use cookie_rs;
use net_traits::CookieSource;
use pub_domains::PUB_DOMAINS;
use std::borrow::ToOwned;
use std::net::{Ipv4Addr, Ipv6Addr};
use time::{Tm, now, at, Duration};
use url::Url;
/// A stored cookie that wraps the definition in cookie-rs. This is used to implement
/// various behaviours defined in the spec that rely on an associated request URL,
/// which cookie-rs and hyper's header parsing do not support.
#[derive(Clone, Debug)]
pub struct Cookie {
pub cookie: cookie_rs::Cookie,
pub host_only: bool,
pub persistent: bool,
pub creation_time: Tm,
pub last_access: Tm,
pub expiry_time: Option<Tm>,
}
impl Cookie {
/// http://tools.ietf.org/html/rfc6265#section-5.3
pub fn new_wrapped(mut cookie: cookie_rs::Cookie, request: &Url, source: CookieSource)
-> Option<Cookie> {
// Step 3
let (persistent, expiry_time) = match (&cookie.max_age, &cookie.expires) {
(&Some(max_age), _) => {
(true, Some(at(now().to_timespec() + Duration::seconds(max_age as i64))))
}
(_, &Some(expires)) => (true, Some(expires)),
_ => (false, None)
};
let url_host = request.host().map(|host| host.serialize()).unwrap_or("".to_owned());
// Step 4
let mut domain = cookie.domain.clone().unwrap_or("".to_owned());
// Step 5
match PUB_DOMAINS.iter().find(|&x| domain == *x) {
Some(val) if *val == url_host => domain = "".to_owned(),
Some(_) => return None,
None => {}
}
// Step 6
let host_only = if !domain.is_empty() {
if !Cookie::domain_match(&url_host, &domain) {
return None;
} else {
cookie.domain = Some(domain);
false
}
} else {
cookie.domain = Some(url_host);
true
};
// Step 7
let mut path = cookie.path.unwrap_or("".to_owned());
if path.is_empty() || path.as_bytes()[0] != b'/' {
let url_path = request.serialize_path();
let url_path = url_path.as_ref().map(|path| &**path);
path = Cookie::default_path(url_path.unwrap_or("")).to_owned();
}
cookie.path = Some(path);
// Step 10
if cookie.httponly && source != CookieSource::HTTP {
return None;
}
Some(Cookie {
cookie: cookie,
host_only: host_only,
persistent: persistent,
creation_time: now(),
last_access: now(),
expiry_time: expiry_time,
})
}
pub fn touch(&mut self) {
self.last_access = now();
}
// http://tools.ietf.org/html/rfc6265#section-5.1.4
pub fn default_path(request_path: &str) -> &str {
// Step 2
if request_path.is_empty() || !request_path.starts_with("/") {
return "/";
}
// Step 3
let rightmost_slash_idx = request_path.rfind("/").unwrap();
if rightmost_slash_idx == 0 {
// There's only one slash; it's the first character
return "/";
}
// Step 4
&request_path[..rightmost_slash_idx]
}
// http://tools.ietf.org/html/rfc6265#section-5.1.4
pub fn path_match(request_path: &str, cookie_path: &str) -> bool {
request_path == cookie_path ||
( request_path.starts_with(cookie_path) &&
( request_path.ends_with("/") || request_path[cookie_path.len()..].starts_with("/"))
)
}
// http://tools.ietf.org/html/rfc6265#section-5.1.3
pub fn domain_match(string: &str, domain_string: &str) -> bool {
if string == domain_string {
return true;
}
if string.ends_with(domain_string)
&& string.as_bytes()[string.len()-domain_string.len()-1] == b'.'
&& string.parse::<Ipv4Addr>().is_err()
&& string.parse::<Ipv6Addr>().is_err() {
return true;
}
false
}
// http://tools.ietf.org/html/rfc6265#section-5.4 step 1
pub fn appropriate_for_url(&self, url: &Url, source: CookieSource) -> bool {
let domain = url.host().map(|host| host.serialize());
if self.host_only {
if self.cookie.domain != domain {
return false;
}
} else {
if let (Some(ref domain), &Some(ref cookie_domain)) = (domain, &self.cookie.domain) {
if !Cookie::domain_match(domain, cookie_domain) {
return false;
}
}
}
if let (Some(ref path), &Some(ref cookie_path)) = (url.serialize_path(), &self.cookie.path) {
if !Cookie::path_match(path, cookie_path) {
return false;
}
}
if self.cookie.secure && url.scheme != "https" {
return false;
}
if self.cookie.httponly && source == CookieSource::NonHTTP {
return false;
}
true
}
}
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