1 files changed, 114 insertions, 0 deletions
diff --git a/third_party/rust/url/src/origin.rs b/third_party/rust/url/src/origin.rs
new file mode 100644
index 000000000..2217c94fe
--- /dev/null
+++ b/third_party/rust/url/src/origin.rs
@@ -0,0 +1,114 @@
+// 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.
+
+#[cfg(feature = "heapsize")] use heapsize::HeapSizeOf;
+use host::Host;
+use idna::domain_to_unicode;
+use parser::default_port;
+use std::sync::atomic::{AtomicUsize, ATOMIC_USIZE_INIT, 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
+#[derive(PartialEq, Eq, 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)
+}
+
+#[cfg(feature = "heapsize")]
+impl HeapSizeOf for Origin {
+    fn heap_size_of_children(&self) -> usize {
+        match *self {
+            Origin::Tuple(ref scheme, ref host, _) => {
+                scheme.heap_size_of_children() +
+                host.heap_size_of_children()
+            },
+            _ => 0,
+        }
+    }
+}
+
+
+impl Origin {
+    /// Creates a new opaque origin that is only equal to itself.
+    pub fn new_opaque() -> Origin {
+        static COUNTER: AtomicUsize = ATOMIC_USIZE_INIT;
+        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, Clone, Debug)]
+pub struct OpaqueOrigin(usize);
+
+#[cfg(feature = "heapsize")]
+known_heap_size!(0, OpaqueOrigin);