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Iframes can't include an ancestor they know about

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This commit is contained in:
Patrick Shaughnessy 2020-01-31 15:26:12 -05:00
parent ed9b584344
commit 89384ffec3
1 changed files with 24 additions and 1 deletions
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25
components/script/dom/htmliframeelement.rs
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@ -287,7 +287,30 @@ impl HTMLIFrameElement {
let url = self.get_url();
// TODO: check ancestor browsing contexts for same URL
// TODO(#25748):
// By spec, we return early if there's an ancestor browsing context
// "whose active document's url, ignoring fragments, is equal".
// However, asking about ancestor browsing contexts is more nuanced than
// it sounds and not implemented here.
// Within a single origin, we can do it by walking window proxies,
// and this check covers only that single-origin case, protecting
// against simple typo self-includes but nothing more elaborate.
let mut ancestor = window.GetParent();
while let Some(a) = ancestor {
if let Some(ancestor_url) = a.document().map(|d| d.url()) {
if ancestor_url.scheme() == url.scheme() &&
ancestor_url.username() == url.username() &&
ancestor_url.password() == url.password() &&
ancestor_url.host() == url.host() &&
ancestor_url.port() == url.port() &&
ancestor_url.path() == url.path() &&
ancestor_url.query() == url.query()
{
return;
}
}
ancestor = a.parent().map(|p| DomRoot::from_ref(p));
}
let creator_pipeline_id = if url.as_str() == "about:blank" {
Some(window.upcast::<GlobalScope>().pipeline_id())