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LibWeb: Fix crash when setting innerHTML inside iframe srcdoc document

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In particular, there was an assertion failure due to the temporary
parser document's "about base URL" being empty when trying to "parse a
URL" during parsing.

We fix this by copying the context element's document's about base URL
to the temporary parsing document while parsing a fragment.

This fixes a crash when loading search results on https://amazon.com/
This commit is contained in:
Andreas Kling
2024-08-28 16:22:44 +02:00
committed by Andreas Kling
parent 782926601d
commit b64df59cc6
3 changed files with 19 additions and 0 deletions
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4
Userland/Libraries/LibWeb/HTML/Parser/HTMLParser.cpp
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@@ -4273,6 +4273,10 @@ Vector<JS::Handle<DOM::Node>> HTMLParser::parse_html_fragment(DOM::Element& cont
auto temp_document = DOM::Document::create_for_fragment_parsing(context_element.realm());
temp_document->set_document_type(DOM::Document::Type::HTML);
// AD-HOC: We set the about base URL of the document to the same as the context element's document.
// This is required for Document::parse_url() to work inside iframe srcdoc documents.
temp_document->set_about_base_url(context_element.document().about_base_url());
// 2. If the node document of the context element is in quirks mode, then let the Document be in quirks mode.
// Otherwise, the node document of the context element is in limited-quirks mode, then let the Document be in limited-quirks mode.
// Otherwise, leave the Document in no-quirks mode.