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LibWeb: Propagate OOM in Body::fully_read() through its error callback

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Fetched bodies can be on the order of gigabytes, so rather than crashing
when we hit OOM here, we can simply invoke the error callback with a DOM
exception. We use "UnknownError" here as the spec directly supports this
for OOM errors:

    UnknownError: The operation failed for an unknown transient reason
                  (e.g. out of memory).

This is still an ad-hoc implementation. We should be using streams, and
we do have the AOs available to do so. But they need to be massaged to
be compatible with callers of Body::fully_read. And once we do use
streams, this function will become infallible - so making it infallible
here is at least a step in the right direction.
This commit is contained in:
Timothy Flynn 2024-04-26 14:57:40 -04:00 • committed by Andreas Kling
commit 1ffda6a805
Notes: sideshowbarker 2024-07-16 18:03:21 +09:00
10 changed files with 39 additions and 42 deletions
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2
Userland/Libraries/LibWeb/HTML/HTMLLinkElement.cpp
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@ -539,7 +539,7 @@ WebIDL::ExceptionOr<void> HTMLLinkElement::load_fallback_favicon_if_needed(JS::N
// 3. Use response's unsafe response as an icon as if it had been declared using the icon keyword.
if (auto body = response->unsafe_response()->body())
body->fully_read(realm, process_body, process_body_error, global).release_value_but_fixme_should_propagate_errors();
body->fully_read(realm, process_body, process_body_error, global);
};
TRY(Fetch::Fetching::fetch(realm, request, Fetch::Infrastructure::FetchAlgorithms::create(vm, move(fetch_algorithms_input))));