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//! This module contains types that represent cookie properties that are not yet
//! standardized. That is, _draft_ features.
use std::fmt;
/// The `SameSite` cookie attribute.
///
/// A cookie with a `SameSite` attribute is imposed restrictions on when it is
/// sent to the origin server in a cross-site request. If the `SameSite`
/// attribute is "Strict", then the cookie is never sent in cross-site requests.
/// If the `SameSite` attribute is "Lax", the cookie is only sent in cross-site
/// requests with "safe" HTTP methods, i.e, `GET`, `HEAD`, `OPTIONS`, `TRACE`.
/// If the `SameSite` attribute is "None", the cookie is sent in all cross-site
/// requests if the "Secure" flag is also set, otherwise the cookie is ignored.
/// This library automatically sets the "Secure" flag on cookies when
/// `same_site` is set to `SameSite::None` as long as `secure` is not explicitly
/// set to `false`.
///
/// If the `SameSite` attribute is not present (by not setting `SameSite`
/// initally or passing `None` to [`Cookie::set_same_site()`]), then the cookie
/// will be sent as normal.
///
/// **Note:** This cookie attribute is an [HTTP draft]! Its meaning and
/// definition are subject to change.
///
/// [`Cookie::set_same_site()`]: crate::Cookie::set_same_site()
/// [HTTP draft]: https://tools.ietf.org/html/draft-west-cookie-incrementalism-00
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub enum SameSite {
/// The "Strict" `SameSite` attribute.
Strict,
/// The "Lax" `SameSite` attribute.
Lax,
/// The "None" `SameSite` attribute.
None
}
impl SameSite {
/// Returns `true` if `self` is `SameSite::Strict` and `false` otherwise.
///
/// # Example
///
/// ```rust
/// use cookie::SameSite;
///
/// let strict = SameSite::Strict;
/// assert!(strict.is_strict());
/// assert!(!strict.is_lax());
/// assert!(!strict.is_none());
/// ```
#[inline]
pub fn is_strict(&self) -> bool {
match *self {
SameSite::Strict => true,
SameSite::Lax | SameSite::None => false,
}
}
/// Returns `true` if `self` is `SameSite::Lax` and `false` otherwise.
///
/// # Example
///
/// ```rust
/// use cookie::SameSite;
///
/// let lax = SameSite::Lax;
/// assert!(lax.is_lax());
/// assert!(!lax.is_strict());
/// assert!(!lax.is_none());
/// ```
#[inline]
pub fn is_lax(&self) -> bool {
match *self {
SameSite::Lax => true,
SameSite::Strict | SameSite::None => false,
}
}
/// Returns `true` if `self` is `SameSite::None` and `false` otherwise.
///
/// # Example
///
/// ```rust
/// use cookie::SameSite;
///
/// let none = SameSite::None;
/// assert!(none.is_none());
/// assert!(!none.is_lax());
/// assert!(!none.is_strict());
/// ```
#[inline]
pub fn is_none(&self) -> bool {
match *self {
SameSite::None => true,
SameSite::Lax | SameSite::Strict => false
}
}
}
impl fmt::Display for SameSite {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
SameSite::Strict => write!(f, "Strict"),
SameSite::Lax => write!(f, "Lax"),
SameSite::None => write!(f, "None"),
}
}
}
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