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- /*
- * Copyright (c) 2022-2023, Linus Groh <linusg@serenityos.org>
- * Copyright (c) 2022-2024, Kenneth Myhra <kennethmyhra@serenityos.org>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
- #include <LibJS/Runtime/Completion.h>
- #include <LibJS/Runtime/TypedArray.h>
- #include <LibWeb/DOMURL/URLSearchParams.h>
- #include <LibWeb/Fetch/BodyInit.h>
- #include <LibWeb/Fetch/Infrastructure/HTTP/Bodies.h>
- #include <LibWeb/FileAPI/Blob.h>
- #include <LibWeb/HTML/FormControlInfrastructure.h>
- #include <LibWeb/HTML/Scripting/TemporaryExecutionContext.h>
- #include <LibWeb/Platform/EventLoopPlugin.h>
- #include <LibWeb/Streams/AbstractOperations.h>
- #include <LibWeb/WebIDL/AbstractOperations.h>
- #include <LibWeb/WebIDL/Buffers.h>
- #include <LibWeb/WebIDL/ExceptionOr.h>
- #include <LibWeb/XHR/FormData.h>
- namespace Web::Fetch {
- // https://fetch.spec.whatwg.org/#bodyinit-safely-extract
- WebIDL::ExceptionOr<Infrastructure::BodyWithType> safely_extract_body(JS::Realm& realm, BodyInitOrReadableBytes const& object)
- {
- // 1. If object is a ReadableStream object, then:
- if (auto const* stream = object.get_pointer<JS::Handle<Streams::ReadableStream>>()) {
- // 1. Assert: object is neither disturbed nor locked.
- VERIFY(!((*stream)->is_disturbed() || (*stream)->is_locked()));
- }
- // 2. Return the result of extracting object.
- return extract_body(realm, object);
- }
- // https://fetch.spec.whatwg.org/#concept-bodyinit-extract
- WebIDL::ExceptionOr<Infrastructure::BodyWithType> extract_body(JS::Realm& realm, BodyInitOrReadableBytes const& object, bool keepalive)
- {
- HTML::TemporaryExecutionContext execution_context { Bindings::host_defined_environment_settings_object(realm), HTML::TemporaryExecutionContext::CallbacksEnabled::Yes };
- auto& vm = realm.vm();
- // 1. Let stream be null.
- JS::GCPtr<Streams::ReadableStream> stream;
- // 2. If object is a ReadableStream object, then set stream to object.
- if (auto const* stream_handle = object.get_pointer<JS::Handle<Streams::ReadableStream>>()) {
- stream = const_cast<Streams::ReadableStream*>(stream_handle->cell());
- }
- // 3. Otherwise, if object is a Blob object, set stream to the result of running object’s get stream.
- else if (auto const* blob_handle = object.get_pointer<JS::Handle<FileAPI::Blob>>()) {
- stream = blob_handle->cell()->get_stream();
- }
- // 4. Otherwise, set stream to a new ReadableStream object, and set up stream with byte reading support.
- else {
- stream = realm.heap().allocate<Streams::ReadableStream>(realm, realm);
- Streams::set_up_readable_stream_controller_with_byte_reading_support(*stream);
- }
- // 5. Assert: stream is a ReadableStream object.
- VERIFY(stream);
- // 6. Let action be null.
- Function<ByteBuffer()> action;
- // 7. Let source be null.
- Infrastructure::Body::SourceType source {};
- // 8. Let length be null.
- Optional<u64> length {};
- // 9. Let type be null.
- Optional<ByteBuffer> type {};
- // 10. Switch on object.
- TRY(object.visit(
- [&](JS::Handle<FileAPI::Blob> const& blob) -> WebIDL::ExceptionOr<void> {
- // Set source to object.
- source = blob;
- // Set length to object’s size.
- length = blob->size();
- // If object’s type attribute is not the empty byte sequence, set type to its value.
- if (!blob->type().is_empty())
- type = MUST(ByteBuffer::copy(blob->type().bytes()));
- return {};
- },
- [&](ReadonlyBytes bytes) -> WebIDL::ExceptionOr<void> {
- // Set source to object.
- source = MUST(ByteBuffer::copy(bytes));
- return {};
- },
- [&](JS::Handle<WebIDL::BufferSource> const& buffer_source) -> WebIDL::ExceptionOr<void> {
- // Set source to a copy of the bytes held by object.
- source = MUST(WebIDL::get_buffer_source_copy(*buffer_source->raw_object()));
- return {};
- },
- [&](JS::Handle<XHR::FormData> const& form_data) -> WebIDL::ExceptionOr<void> {
- // Set action to this step: run the multipart/form-data encoding algorithm, with object’s entry list and UTF-8.
- auto serialized_form_data = MUST(HTML::serialize_to_multipart_form_data(form_data->entry_list()));
- // Set source to object.
- source = serialized_form_data.serialized_data;
- // FIXME: Set length to unclear, see html/6424 for improving this.
- // Set type to `multipart/form-data; boundary=`, followed by the multipart/form-data boundary string generated by the multipart/form-data encoding algorithm.
- type = MUST(ByteBuffer::copy(MUST(String::formatted("multipart/form-data; boundary={}"sv, serialized_form_data.boundary)).bytes()));
- return {};
- },
- [&](JS::Handle<DOMURL::URLSearchParams> const& url_search_params) -> WebIDL::ExceptionOr<void> {
- // Set source to the result of running the application/x-www-form-urlencoded serializer with object’s list.
- auto search_params_string = url_search_params->to_string();
- source = MUST(ByteBuffer::copy(search_params_string.bytes()));
- // Set type to `application/x-www-form-urlencoded;charset=UTF-8`.
- type = MUST(ByteBuffer::copy("application/x-www-form-urlencoded;charset=UTF-8"sv.bytes()));
- return {};
- },
- [&](String const& scalar_value_string) -> WebIDL::ExceptionOr<void> {
- // NOTE: AK::String is always UTF-8.
- // Set source to the UTF-8 encoding of object.
- source = MUST(ByteBuffer::copy(scalar_value_string.bytes()));
- // Set type to `text/plain;charset=UTF-8`.
- type = MUST(ByteBuffer::copy("text/plain;charset=UTF-8"sv.bytes()));
- return {};
- },
- [&](JS::Handle<Streams::ReadableStream> const& stream) -> WebIDL::ExceptionOr<void> {
- // If keepalive is true, then throw a TypeError.
- if (keepalive)
- return WebIDL::SimpleException { WebIDL::SimpleExceptionType::TypeError, "Cannot extract body from stream when keepalive is set"sv };
- // If object is disturbed or locked, then throw a TypeError.
- if (stream->is_disturbed() || stream->is_locked())
- return WebIDL::SimpleException { WebIDL::SimpleExceptionType::TypeError, "Cannot extract body from disturbed or locked stream"sv };
- return {};
- }));
- // 11. If source is a byte sequence, then set action to a step that returns source and length to source’s length.
- // For now, do it synchronously.
- if (source.has<ByteBuffer>()) {
- action = [source = MUST(ByteBuffer::copy(source.get<ByteBuffer>()))]() mutable {
- return move(source);
- };
- length = source.get<ByteBuffer>().size();
- }
- // 12. If action is non-null, then run these steps in parallel:
- if (action) {
- Platform::EventLoopPlugin::the().deferred_invoke([&realm, stream, action = move(action)] {
- HTML::TemporaryExecutionContext execution_context { Bindings::host_defined_environment_settings_object(realm), HTML::TemporaryExecutionContext::CallbacksEnabled::Yes };
- // 1. Run action.
- auto bytes = action();
- // Whenever one or more bytes are available and stream is not errored, enqueue the result of creating a
- // Uint8Array from the available bytes into stream.
- if (!bytes.is_empty() && !stream->is_errored()) {
- auto array_buffer = JS::ArrayBuffer::create(stream->realm(), move(bytes));
- auto chunk = JS::Uint8Array::create(stream->realm(), array_buffer->byte_length(), *array_buffer);
- Streams::readable_stream_enqueue(*stream->controller(), chunk).release_value_but_fixme_should_propagate_errors();
- }
- // When running action is done, close stream.
- stream->close();
- });
- }
- // 13. Let body be a body whose stream is stream, source is source, and length is length.
- auto body = Infrastructure::Body::create(vm, *stream, move(source), move(length));
- // 14. Return (body, type).
- return Infrastructure::BodyWithType { .body = move(body), .type = move(type) };
- }
- }
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