Implement origin concept.

components/script/dom/bindings/trace.rs

@@ -89,6 +89,7 @@ use style::properties::PropertyDeclarationBlock;
 use style::restyle_hints::ElementSnapshot;
 use style::selector_impl::PseudoElement;
 use style::values::specified::Length;
+use url::Origin as UrlOrigin;
 use url::Url;
 use util::str::{DOMString, LengthOrPercentageOrAuto};
 use uuid::Uuid;
@@ -276,7 +277,7 @@ impl<A: JSTraceable, B: JSTraceable, C: JSTraceable> JSTraceable for (A, B, C) {
     }
 }
 
-no_jsmanaged_fields!(bool, f32, f64, String, Url, AtomicBool, AtomicUsize, Uuid);
+no_jsmanaged_fields!(bool, f32, f64, String, Url, AtomicBool, AtomicUsize, UrlOrigin, Uuid);
 no_jsmanaged_fields!(usize, u8, u16, u32, u64);
 no_jsmanaged_fields!(isize, i8, i16, i32, i64);
 no_jsmanaged_fields!(Sender<T>);

components/script/dom/document.rs

@@ -94,6 +94,7 @@ use net_traits::CookieSource::NonHTTP;
 use net_traits::response::HttpsState;
 use net_traits::{AsyncResponseTarget, PendingAsyncLoad};
 use num::ToPrimitive;
+use origin::Origin;
 use script_runtime::ScriptChan;
 use script_thread::{MainThreadScriptChan, MainThreadScriptMsg, Runnable};
 use script_traits::UntrustedNodeAddress;
@@ -223,6 +224,8 @@ pub struct Document {
     /// https://html.spec.whatwg.org/multipage/#concept-document-https-state
     https_state: Cell<HttpsState>,
     touchpad_pressure_phase: Cell<TouchpadPressurePhase>,
+    /// The document's origin.
+    origin: Origin,
 }
 
 #[derive(JSTraceable, HeapSizeOf)]
@@ -1544,14 +1547,6 @@ impl Document {
 
     /// https://html.spec.whatwg.org/multipage/#cookie-averse-document-object
     fn is_cookie_averse(&self) -> bool {
-        /// https://url.spec.whatwg.org/#network-scheme
-        fn url_has_network_scheme(url: &Url) -> bool {
-            match &*url.scheme {
-                "ftp" | "http" | "https" => true,
-                _ => false,
-            }
-        }
-
         self.browsing_context.is_none() || !url_has_network_scheme(&self.url)
     }
 
@@ -1590,6 +1585,14 @@ impl LayoutDocumentHelpers for LayoutJS<Document> {
     }
 }
 
+/// https://url.spec.whatwg.org/#network-scheme
+fn url_has_network_scheme(url: &Url) -> bool {
+    match &*url.scheme {
+        "ftp" | "http" | "https" => true,
+        _ => false,
+    }
+}
+
 impl Document {
     pub fn new_inherited(window: &Window,
                          browsing_context: Option<&BrowsingContext>,
@@ -1608,6 +1611,15 @@ impl Document {
             (DocumentReadyState::Complete, true)
         };
 
+        // Incomplete implementation of Document origin specification at
+        // https://html.spec.whatwg.org/multipage/#origin:document
+        let origin = if url_has_network_scheme(&url) {
+            Origin::new(&url)
+        } else {
+            // Default to DOM standard behaviour
+            Origin::opaque_identifier()
+        };
+
         Document {
             node: Node::new_document_node(),
             window: JS::from_ref(window),
@@ -1673,6 +1685,7 @@ impl Document {
             css_errors_store: DOMRefCell::new(vec![]),
             https_state: Cell::new(HttpsState::None),
             touchpad_pressure_phase: Cell::new(TouchpadPressurePhase::BeforeClick),
+            origin: origin,
         }
     }
 

components/script/lib.rs

@@ -90,6 +90,7 @@ pub mod dom;
 pub mod layout_interface;
 mod mem;
 mod network_listener;
+pub mod origin;
 pub mod page;
 pub mod parse;
 pub mod reporter;

components/script/origin.rs

@@ -0,0 +1,73 @@
+/* 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/. */
+
+use std::cell::RefCell;
+use std::rc::Rc;
+use url::{OpaqueOrigin, Origin as UrlOrigin};
+use url::{Url, Host};
+
+/// A representation of an [origin](https://html.spec.whatwg.org/multipage/#origin-2).
+#[derive(HeapSizeOf)]
+pub struct Origin {
+    #[ignore_heap_size_of = "Rc<T> has unclear ownership semantics"]
+    inner: Rc<RefCell<UrlOrigin>>,
+}
+
+// We can't use RefCell inside JSTraceable, but Origin doesn't contain JS values and
+// DOMRefCell makes it much harder to write unit tests (due to setting up required TLS).
+no_jsmanaged_fields!(Origin);
+
+impl Origin {
+    /// Create a new origin comprising a unique, opaque identifier.
+    pub fn opaque_identifier() -> Origin {
+        let opaque = UrlOrigin::UID(OpaqueOrigin::new());
+        Origin {
+            inner: Rc::new(RefCell::new(opaque)),
+        }
+    }
+
+    /// Create a new origin for the given URL.
+    pub fn new(url: &Url) -> Origin {
+        Origin {
+            inner: Rc::new(RefCell::new(url.origin())),
+        }
+    }
+
+    pub fn set(&self, origin: UrlOrigin) {
+        *self.inner.borrow_mut() = origin;
+    }
+
+    /// Does this origin represent a host/scheme/port tuple?
+    pub fn is_scheme_host_port_tuple(&self) -> bool {
+        match *self.inner.borrow() {
+            UrlOrigin::Tuple(..) => true,
+            UrlOrigin::UID(..) => false,
+        }
+    }
+
+    /// Return the host associated with this origin.
+    pub fn host(&self) -> Option<Host> {
+        match *self.inner.borrow() {
+            UrlOrigin::Tuple(_, ref host, _) => Some(host.clone()),
+            UrlOrigin::UID(..) => None,
+        }
+    }
+
+    /// https://html.spec.whatwg.org/multipage/#same-origin
+    pub fn same_origin(&self, other: &Origin) -> bool {
+        *self.inner.borrow() == *other.inner.borrow()
+    }
+
+    pub fn copy(&self) -> Origin {
+        Origin {
+            inner: Rc::new(RefCell::new(self.inner.borrow().clone())),
+        }
+    }
+
+    pub fn alias(&self) -> Origin {
+        Origin {
+            inner: self.inner.clone(),
+        }
+    }
+}

components/servo/Cargo.lock

@@ -1752,7 +1752,9 @@ name = "script_tests"
 version = "0.0.1"
 dependencies = [
  "msg 0.0.1",
+ "plugins 0.0.1",
  "script 0.0.1",
+ "url 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "util 0.0.1",
 ]
 

tests/unit/script/Cargo.toml

@@ -11,8 +11,14 @@ doctest = false
 [dependencies.msg]
 path = "../../../components/msg"
 
+[dependencies.plugins]
+path = "../../../components/plugins"
+
 [dependencies.script]
 path = "../../../components/script"
 
 [dependencies.util]
 path = "../../../components/util"
+
+[dependencies]
+url = {version = "0.5.8", features = ["heap_size"]}

tests/unit/script/lib.rs

@@ -2,10 +2,15 @@
  * 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/. */
 
+#![feature(plugin)]
+#![plugin(plugins)]
+
 extern crate msg;
 extern crate script;
+extern crate url;
 extern crate util;
 
+#[cfg(test)] mod origin;
 #[cfg(all(test, target_pointer_width = "64"))] mod size_of;
 #[cfg(test)] mod textinput;
 #[cfg(test)] mod dom {

tests/unit/script/origin.rs

@@ -0,0 +1,105 @@
+/* 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/. */
+
+use script::origin::Origin;
+
+#[test]
+fn same_origin() {
+    let a = Origin::new(&url!("http://example.com/a.html"));
+    let b = Origin::new(&url!("http://example.com/b.html"));
+    assert!(a.same_origin(&b));
+    assert_eq!(a.is_scheme_host_port_tuple(), true);
+}
+
+#[test]
+fn identical_origin() {
+    let a = Origin::new(&url!("http://example.com/a.html"));
+    assert!(a.same_origin(&a));
+}
+
+#[test]
+fn cross_origin() {
+    let a = Origin::new(&url!("http://example.com/a.html"));
+    let b = Origin::new(&url!("http://example.org/b.html"));
+    assert!(!a.same_origin(&b));
+}
+
+#[test]
+fn alias_same_origin() {
+    let a = Origin::new(&url!("http://example.com/a.html"));
+    let b = Origin::new(&url!("http://example.com/b.html"));
+    let c = b.alias();
+    assert!(a.same_origin(&c));
+    assert!(b.same_origin(&b));
+    assert!(c.same_origin(&b));
+    assert_eq!(c.is_scheme_host_port_tuple(), true);
+}
+
+#[test]
+fn alias_cross_origin() {
+    let a = Origin::new(&url!("http://example.com/a.html"));
+    let b = Origin::new(&url!("http://example.org/b.html"));
+    let c = b.alias();
+    assert!(!a.same_origin(&c));
+    assert!(b.same_origin(&c));
+    assert!(c.same_origin(&c));
+}
+
+#[test]
+fn alias_update_same_origin() {
+    let a = Origin::new(&url!("http://example.com/a.html"));
+    let b = Origin::new(&url!("http://example.org/b.html"));
+    let c = b.alias();
+    b.set(url!("http://example.com/c.html").origin());
+    assert!(a.same_origin(&c));
+    assert!(b.same_origin(&c));
+    assert!(c.same_origin(&c));
+}
+
+#[test]
+fn alias_update_cross_origin() {
+    let a = Origin::new(&url!("http://example.com/a.html"));
+    let b = Origin::new(&url!("http://example.com/b.html"));
+    let c = b.alias();
+    b.set(url!("http://example.org/c.html").origin());
+    assert!(!a.same_origin(&c));
+    assert!(b.same_origin(&c));
+    assert!(c.same_origin(&c));
+}
+
+#[test]
+fn alias_chain() {
+    let a = Origin::new(&url!("http://example.com/a.html"));
+    let b = Origin::new(&url!("http://example.com/b.html"));
+    let c = b.copy();
+    let d = c.alias();
+    let e = d.alias();
+    assert!(a.same_origin(&e));
+    assert!(b.same_origin(&e));
+    assert!(c.same_origin(&e));
+    assert!(d.same_origin(&e));
+    assert!(e.same_origin(&e));
+    c.set(url!("http://example.org/c.html").origin());
+    assert!(a.same_origin(&b));
+    assert!(!b.same_origin(&c));
+    assert!(c.same_origin(&d));
+    assert!(d.same_origin(&e));
+    assert!(!e.same_origin(&a));
+}
+
+#[test]
+fn opaque() {
+    let a = Origin::opaque_identifier();
+    let b = Origin::opaque_identifier();
+    assert!(!a.same_origin(&b));
+    assert_eq!(a.is_scheme_host_port_tuple(), false);
+}
+
+#[test]
+fn opaque_clone() {
+    let a = Origin::opaque_identifier();
+    let b = a.alias();
+    assert!(a.same_origin(&b));
+    assert_eq!(a.is_scheme_host_port_tuple(), false);
+}