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@@ -13,6 +13,19 @@
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namespace Web::Fetch {
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+// https://fetch.spec.whatwg.org/#bodyinit-safely-extract
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+WebIDL::ExceptionOr<Infrastructure::BodyWithType> safely_extract_body(JS::Realm& realm, BodyInitOrReadbleBytes const& object)
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+{
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+ // 1. If object is a ReadableStream object, then:
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+ if (auto const* stream = object.get_pointer<JS::Handle<Streams::ReadableStream>>()) {
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+ // 1. Assert: object is neither disturbed nor locked.
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+ VERIFY(!((*stream)->is_disturbed() || (*stream)->is_locked()));
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+ }
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+
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+ // 2. Return the result of extracting object.
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+ return extract_body(realm, object);
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+}
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+
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// https://fetch.spec.whatwg.org/#concept-bodyinit-extract
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WebIDL::ExceptionOr<Infrastructure::BodyWithType> extract_body(JS::Realm& realm, BodyInitOrReadbleBytes const& object, bool keepalive)
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{
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