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// Copyright 2016 The rust-url developers.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use host::Host;
use idna::domain_to_unicode;
use parser::default_port;
use std::sync::atomic::{AtomicUsize, Ordering};
use Url;
pub fn url_origin(url: &Url) -> Origin {
let scheme = url.scheme();
match scheme {
"blob" => {
let result = Url::parse(url.path());
match result {
Ok(ref url) => url_origin(url),
Err(_) => Origin::new_opaque(),
}
}
"ftp" | "gopher" | "http" | "https" | "ws" | "wss" => Origin::Tuple(
scheme.to_owned(),
url.host().unwrap().to_owned(),
url.port_or_known_default().unwrap(),
),
// TODO: Figure out what to do if the scheme is a file
"file" => Origin::new_opaque(),
_ => Origin::new_opaque(),
}
}
/// The origin of an URL
///
/// Two URLs with the same origin are considered
/// to originate from the same entity and can therefore trust
/// each other.
///
/// The origin is determined based on the scheme as follows:
///
/// - If the scheme is "blob" the origin is the origin of the
/// URL contained in the path component. If parsing fails,
/// it is an opaque origin.
/// - If the scheme is "ftp", "gopher", "http", "https", "ws", or "wss",
/// then the origin is a tuple of the scheme, host, and port.
/// - If the scheme is anything else, the origin is opaque, meaning
/// the URL does not have the same origin as any other URL.
///
/// For more information see <https://url.spec.whatwg.org/#origin>
#[derive(PartialEq, Eq, Hash, Clone, Debug)]
pub enum Origin {
/// A globally unique identifier
Opaque(OpaqueOrigin),
/// Consists of the URL's scheme, host and port
Tuple(String, Host<String>, u16),
}
impl Origin {
/// Creates a new opaque origin that is only equal to itself.
pub fn new_opaque() -> Origin {
static COUNTER: AtomicUsize = AtomicUsize::new(0);
Origin::Opaque(OpaqueOrigin(COUNTER.fetch_add(1, Ordering::SeqCst)))
}
/// Return whether this origin is a (scheme, host, port) tuple
/// (as opposed to an opaque origin).
pub fn is_tuple(&self) -> bool {
matches!(*self, Origin::Tuple(..))
}
/// <https://html.spec.whatwg.org/multipage/#ascii-serialisation-of-an-origin>
pub fn ascii_serialization(&self) -> String {
match *self {
Origin::Opaque(_) => "null".to_owned(),
Origin::Tuple(ref scheme, ref host, port) => {
if default_port(scheme) == Some(port) {
format!("{}://{}", scheme, host)
} else {
format!("{}://{}:{}", scheme, host, port)
}
}
}
}
/// <https://html.spec.whatwg.org/multipage/#unicode-serialisation-of-an-origin>
pub fn unicode_serialization(&self) -> String {
match *self {
Origin::Opaque(_) => "null".to_owned(),
Origin::Tuple(ref scheme, ref host, port) => {
let host = match *host {
Host::Domain(ref domain) => {
let (domain, _errors) = domain_to_unicode(domain);
Host::Domain(domain)
}
_ => host.clone(),
};
if default_port(scheme) == Some(port) {
format!("{}://{}", scheme, host)
} else {
format!("{}://{}:{}", scheme, host, port)
}
}
}
}
}
/// Opaque identifier for URLs that have file or other schemes
#[derive(Eq, PartialEq, Hash, Clone, Debug)]
pub struct OpaqueOrigin(usize);
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