servo · bors-servo · Oct 4, 2015 · Sep 21, 2015
diff --git a/components/net/storage_task.rs b/components/net/storage_task.rs
@@ -53,6 +53,9 @@ impl StorageManager {
                 StorageTaskMsg::Key(sender, url, storage_type, index) => {
                     self.key(sender, url, storage_type, index)
                 }
+                StorageTaskMsg::Keys(sender, url, storage_type) => {
+                    self.keys(sender, url, storage_type)
+                }
                 StorageTaskMsg::SetItem(sender, url, storage_type, name, value) => {
                     self.set_item(sender, url, storage_type, name, value)
                 }
@@ -106,6 +109,18 @@ impl StorageManager {
                     .map(|key| key.clone())).unwrap();
     }
 
+    fn keys(&self,
+            sender: IpcSender<Vec<DOMString>>,
+            url: Url,
+            storage_type: StorageType) {
+        let origin = self.origin_as_string(url);
+        let data = self.select_data(storage_type);
+        let keys = data.get(&origin)
+                       .map_or(vec![], |entry| entry.keys().cloned().collect());
+
+        sender.send(keys).unwrap();
+    }
+
     /// Sends Some(old_value) in case there was a previous value with the same key name but with different
     /// value name, otherwise sends None
     fn set_item(&mut self,

diff --git a/components/net_traits/storage_task.rs b/components/net_traits/storage_task.rs
@@ -21,6 +21,9 @@ pub enum StorageTaskMsg {
     /// gets the name of the key at the specified index in the associated storage data
     Key(IpcSender<Option<DOMString>>, Url, StorageType, u32),
 
+    /// Gets the available keys in the associated storage data
+    Keys(IpcSender<Vec<DOMString>>, Url, StorageType),
+
     /// gets the value associated with the given key in the associated storage data
     GetItem(IpcSender<Option<DOMString>>, Url, StorageType, DOMString),
 

diff --git a/components/script/dom/storage.rs b/components/script/dom/storage.rs
@@ -116,8 +116,10 @@ impl StorageMethods for Storage {
 
     // https://html.spec.whatwg.org/multipage/#the-storage-interface:supported-property-names
     fn SupportedPropertyNames(&self) -> Vec<DOMString> {
-        // FIXME: unimplemented (https://github.com/servo/servo/issues/7273)
-        vec![]
+        let (sender, receiver) = ipc::channel().unwrap();
+
+        self.get_storage_task().send(StorageTaskMsg::Keys(sender, self.get_url(), self.storage_type)).unwrap();
+        receiver.recv().unwrap()
     }
 
     // check-tidy: no specs after this line

diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json

         "path": "dom/collections/HTMLCollection-supported-property-names.html",
         "url": "/dom/collections/HTMLCollection-supported-property-names.html"
       },
+      {
+        "path": "dom/collections/storage-supported-property-names.html",
+        "url": "/dom/collections/storage-supported-property-names.html"
+      },
       {
         "path": "dom/events/Event-constants.html",
         "url": "/dom/events/Event-constants.html"

   "rev": "0159b3ec9ba5355a3340621226e02ae026effd7f",
   "url_base": "/",
   "version": 2
-}
+}
diff --git a/tests/wpt/web-platform-tests/dom/collections/storage-supported-property-names.html b/tests/wpt/web-platform-tests/dom/collections/storage-supported-property-names.html
@@ -0,0 +1,23 @@
+<!DOCTYPE HTML>
+<meta charset=utf-8>
+<title>Storage Test: Supported property names</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<script>
+    ["localStorage", "sessionStorage"].forEach(function(name) {
+        test(function() {
+            var storage = window[name];
+            storage.clear();
+
+            storage["name"] = "user1";
+            assert_array_equals(Object.getOwnPropertyNames(storage), ['name']);
+        }, "Object.getOwnPropertyNames on " + name + " Storage");
+
+        test(function() {
+            var storage = window[name];
+            storage.clear();
+            assert_array_equals(Object.getOwnPropertyNames(storage), []);
+        }, "Object.getOwnPropertyNames on " + name + " storage with empty collection");
+    });
+</script>