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LibWeb/Fetch: Store Response error message as a String{,View} variant

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The majority of error strings are StringView literals, and it seems
silly to require heap-allocating strings for these.

This idea is stolen from a recent change in fd1fbad :^)
This commit is contained in:
Linus Groh 2023-03-03 18:02:43 +00:00
parent 03f32bdf86
commit 1032ac2453
5 changed files with 45 additions and 37 deletions
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22
Userland/Libraries/LibWeb/Fetch/Infrastructure/HTTP/Responses.cpp
View file

@ -37,16 +37,16 @@ JS::NonnullGCPtr<Response> Response::create(JS::VM& vm)
// A network error is a response whose status is always 0, status message is always
// the empty byte sequence, header list is always empty, and body is always null.
ErrorOr<JS::NonnullGCPtr<Response>> Response::aborted_network_error(JS::VM& vm)
JS::NonnullGCPtr<Response> Response::aborted_network_error(JS::VM& vm)
{
auto response = network_error(vm, TRY("Fetch has been aborted"_string));
auto response = network_error(vm, "Fetch has been aborted"sv);
response->set_aborted(true);
return response;
}
JS::NonnullGCPtr<Response> Response::network_error(JS::VM& vm, String message)
JS::NonnullGCPtr<Response> Response::network_error(JS::VM& vm, Variant<String, StringView> message)
{
dbgln_if(WEB_FETCH_DEBUG, "Fetch: Creating network error response with message: {}", message);
dbgln_if(WEB_FETCH_DEBUG, "Fetch: Creating network error response with message: {}", message.visit([](auto const& s) -> StringView { return s; }));
auto response = Response::create(vm);
response->set_status(0);
response->set_type(Type::Error);
@ -56,15 +56,15 @@ JS::NonnullGCPtr<Response> Response::network_error(JS::VM& vm, String message)
}
// https://fetch.spec.whatwg.org/#appropriate-network-error
ErrorOr<JS::NonnullGCPtr<Response>> Response::appropriate_network_error(JS::VM& vm, FetchParams const& fetch_params)
JS::NonnullGCPtr<Response> Response::appropriate_network_error(JS::VM& vm, FetchParams const& fetch_params)
{
// 1. Assert: fetchParams is canceled.
VERIFY(fetch_params.is_canceled());
// 2. Return an aborted network error if fetchParams is aborted; otherwise return a network error.
return fetch_params.is_aborted()
? TRY(aborted_network_error(vm))
: network_error(vm, TRY("Fetch has been terminated"_string));
? aborted_network_error(vm)
: network_error(vm, "Fetch has been terminated"sv);
}
// https://fetch.spec.whatwg.org/#concept-aborted-network-error
@ -170,6 +170,14 @@ WebIDL::ExceptionOr<JS::NonnullGCPtr<Response>> Response::clone(JS::VM& vm) cons
return new_response;
}
// Non-standard
Optional<StringView> Response::network_error_message() const
{
if (!m_network_error_message.has_value())
return {};
return m_network_error_message->visit([](auto const& s) -> StringView { return s; });
}
FilteredResponse::FilteredResponse(JS::NonnullGCPtr<Response> internal_response, JS::NonnullGCPtr<HeaderList> header_list)
: Response(header_list)
, m_internal_response(internal_response)

10
Userland/Libraries/LibWeb/Fetch/Infrastructure/HTTP/Responses.h
View file

@ -50,9 +50,9 @@ public:
};
[[nodiscard]] static JS::NonnullGCPtr<Response> create(JS::VM&);
static ErrorOr<JS::NonnullGCPtr<Response>> aborted_network_error(JS::VM&);
[[nodiscard]] static JS::NonnullGCPtr<Response> network_error(JS::VM&, String message);
static ErrorOr<JS::NonnullGCPtr<Response>> appropriate_network_error(JS::VM&, FetchParams const&);
[[nodiscard]] static JS::NonnullGCPtr<Response> aborted_network_error(JS::VM&);
[[nodiscard]] static JS::NonnullGCPtr<Response> network_error(JS::VM&, Variant<String, StringView> message);
[[nodiscard]] static JS::NonnullGCPtr<Response> appropriate_network_error(JS::VM&, FetchParams const&);
virtual ~Response() = default;
@ -109,7 +109,7 @@ public:
[[nodiscard]] WebIDL::ExceptionOr<JS::NonnullGCPtr<Response>> clone(JS::VM&) const;
// Non-standard
Optional<String> const& network_error_message() const { return m_network_error_message; }
[[nodiscard]] Optional<StringView> network_error_message() const;
protected:
explicit Response(JS::NonnullGCPtr<HeaderList>);
@ -177,7 +177,7 @@ private:
bool m_has_cross_origin_redirects { false };
// Non-standard
Optional<String> m_network_error_message;
Optional<Variant<String, StringView>> m_network_error_message;
};
// https://fetch.spec.whatwg.org/#concept-filtered-response