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LibWeb: Implement fetch a classic worker script

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Andrew Kaster 2023-11-09 18:08:00 -07:00 • committed by Andreas Kling
parent d7d84ee931
commit 3dbbb5b263
2 changed files with 91 additions and 0 deletions
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82
Userland/Libraries/LibWeb/HTML/Scripting/Fetching.cpp
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@ -13,6 +13,7 @@
#include <LibWeb/Fetch/Infrastructure/HTTP/Headers.h>
#include <LibWeb/Fetch/Infrastructure/HTTP/Requests.h>
#include <LibWeb/Fetch/Infrastructure/HTTP/Responses.h>
#include <LibWeb/Fetch/Infrastructure/URL.h>
#include <LibWeb/HTML/HTMLScriptElement.h>
#include <LibWeb/HTML/PotentialCORSRequest.h>
#include <LibWeb/HTML/Scripting/ClassicScript.h>
@ -32,6 +33,11 @@ OnFetchScriptComplete create_on_fetch_script_complete(JS::Heap& heap, Function<v
return JS::create_heap_function(heap, move(function));
}
PerformTheFetchHook create_perform_the_fetch_hook(JS::Heap& heap, Function<WebIDL::ExceptionOr<void>(JS::NonnullGCPtr<Fetch::Infrastructure::Request>, IsTopLevel, Fetch::Infrastructure::FetchAlgorithms::ProcessResponseConsumeBodyFunction)> function)
{
return JS::create_heap_function(heap, move(function));
}
ScriptFetchOptions default_classic_script_fetch_options()
{
// The default classic script fetch options are a script fetch options whose cryptographic nonce is the empty string,
@ -335,6 +341,82 @@ WebIDL::ExceptionOr<void> fetch_classic_script(JS::NonnullGCPtr<HTMLScriptElemen
return {};
}
// https://html.spec.whatwg.org/multipage/webappapis.html#fetch-a-classic-worker-script
WebIDL::ExceptionOr<void> fetch_classic_worker_script(AK::URL const& url, EnvironmentSettingsObject& fetch_client, Fetch::Infrastructure::Request::Destination destination, EnvironmentSettingsObject& settings_object, PerformTheFetchHook perform_fetch, OnFetchScriptComplete on_complete)
{
auto& realm = settings_object.realm();
auto& vm = realm.vm();
// 1. Let request be a new request whose URL is url, client is fetchClient, destination is destination, initiator type is "other",
// mode is "same-origin", credentials mode is "same-origin", parser metadata is "not parser-inserted",
// and whose use-URL-credentials flag is set.
auto request = Fetch::Infrastructure::Request::create(vm);
request->set_url(url);
request->set_client(&fetch_client);
request->set_destination(destination);
request->set_initiator_type(Fetch::Infrastructure::Request::InitiatorType::Other);
// FIXME: Use proper SameOrigin CORS mode once Origins are set properly in WorkerHost processes
request->set_mode(Fetch::Infrastructure::Request::Mode::NoCORS);
request->set_credentials_mode(Fetch::Infrastructure::Request::CredentialsMode::SameOrigin);
request->set_parser_metadata(Fetch::Infrastructure::Request::ParserMetadata::NotParserInserted);
request->set_use_url_credentials(true);
auto process_response_consume_body = [&settings_object, on_complete = move(on_complete)](auto response, auto body_bytes) {
// 1. Set response to response's unsafe response.
response = response->unsafe_response();
// 2. If either of the following conditions are met:
// - bodyBytes is null or failure; or
// - response's status is not an ok status,
if (body_bytes.template has<Empty>() || body_bytes.template has<Fetch::Infrastructure::FetchAlgorithms::ConsumeBodyFailureTag>() || !Fetch::Infrastructure::is_ok_status(response->status())) {
// then run onComplete given null, and abort these steps.
on_complete->function()(nullptr);
return;
}
// 3. If all of the following are true:
// - response's URL's scheme is an HTTP(S) scheme; and
// - the result of extracting a MIME type from response's header list is not a JavaScript MIME type,
auto maybe_mime_type = MUST(response->header_list()->extract_mime_type());
if (response->url().has_value() && Fetch::Infrastructure::is_http_or_https_scheme(response->url()->scheme()) && (!maybe_mime_type.has_value() || maybe_mime_type->is_javascript())) {
dbgln("Invalid non-javascript mime type for worker script at {}", response->url().value());
// then run onComplete given null, and abort these steps.
on_complete->function()(nullptr);
return;
}
// NOTE: Other fetch schemes are exempted from MIME type checking for historical web-compatibility reasons.
// We might be able to tighten this in the future; see https://github.com/whatwg/html/issues/3255.
// 4. Let sourceText be the result of UTF-8 decoding bodyBytes.
auto decoder = TextCodec::decoder_for("UTF-8"sv);
VERIFY(decoder.has_value());
auto source_text = TextCodec::convert_input_to_utf8_using_given_decoder_unless_there_is_a_byte_order_mark(*decoder, body_bytes.template get<ByteBuffer>()).release_value_but_fixme_should_propagate_errors();
// 5. Let script be the result of creating a classic script using sourceText, settingsObject,
// response's URL, and the default classic script fetch options.
auto response_url = response->url().value_or({});
auto script = ClassicScript::create(response_url.to_deprecated_string(), source_text, settings_object, response_url);
// 6. Run onComplete given script.
on_complete->function()(script);
};
// 2. If performFetch was given, run performFetch with request, true, and with processResponseConsumeBody as defined below.
if (perform_fetch != nullptr) {
TRY(perform_fetch->function()(request, IsTopLevel::Yes, move(process_response_consume_body)));
}
// Otherwise, fetch request with processResponseConsumeBody set to processResponseConsumeBody as defined below.
else {
Fetch::Infrastructure::FetchAlgorithms::Input fetch_algorithms_input {};
fetch_algorithms_input.process_response_consume_body = move(process_response_consume_body);
TRY(Fetch::Fetching::fetch(realm, request, Fetch::Infrastructure::FetchAlgorithms::create(vm, move(fetch_algorithms_input))));
}
return {};
}
// https://html.spec.whatwg.org/multipage/webappapis.html#internal-module-script-graph-fetching-procedure
void fetch_internal_module_script_graph(JS::Realm& realm, JS::ModuleRequest const& module_request, EnvironmentSettingsObject& fetch_client_settings_object, Fetch::Infrastructure::Request::Destination destination, ScriptFetchOptions const& options, Script& referring_script, HashTable<ModuleLocationTuple> const& visited_set, OnFetchScriptComplete on_complete)
{