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LibWeb: Implement MessagePort.postMessage closer to the spec

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Use a LocalSocket to represent the connection between two message ports.

The concept of the port message queue is still missing, however. When
that concept is implemented, the "steps" in step 7 of the message port
transfer steps will need to send the serialized data over the connected
socketpair and run in the event loop of the process that holds onto the
other side of the message port. Doing this should allow centralizing the
behavior of postMessage for Window, MessagePorts and Workers.
This commit is contained in:
Andrew Kaster
2023-12-18 17:24:31 -07:00
committed by Andreas Kling
parent c7f7ee2c4b
commit f68c67bf3f
7 changed files with 142 additions and 33 deletions
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6
Userland/Libraries/LibWeb/HTML/StructuredSerialize.cpp
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@@ -1019,7 +1019,7 @@ static bool is_interface_exposed_on_target_realm(u8 name, JS::Realm& realm)
return false;
}
static WebIDL::ExceptionOr<JS::NonnullGCPtr<Bindings::PlatformObject>> create_transferred_value(TransferType name, JS::Realm& target_realm, TransferDataHolder const& transfer_data_holder)
static WebIDL::ExceptionOr<JS::NonnullGCPtr<Bindings::PlatformObject>> create_transferred_value(TransferType name, JS::Realm& target_realm, TransferDataHolder& transfer_data_holder)
{
switch (name) {
case TransferType::MessagePort: {
@@ -1032,7 +1032,7 @@ static WebIDL::ExceptionOr<JS::NonnullGCPtr<Bindings::PlatformObject>> create_tr
}
// https://html.spec.whatwg.org/multipage/structured-data.html#structureddeserializewithtransfer
WebIDL::ExceptionOr<DeserializedTransferRecord> structured_deserialize_with_transfer(JS::VM& vm, SerializedTransferRecord const& serialize_with_transfer_result)
WebIDL::ExceptionOr<DeserializedTransferRecord> structured_deserialize_with_transfer(JS::VM& vm, SerializedTransferRecord& serialize_with_transfer_result)
{
auto& target_realm = *vm.current_realm();
@@ -1068,7 +1068,7 @@ WebIDL::ExceptionOr<DeserializedTransferRecord> structured_deserialize_with_tran
// 4. Otherwise:
else {
// 1. Let interfaceName be transferDataHolder.[[Type]].
u8 const interface_name = transfer_data_holder.data[0];
u8 const interface_name = transfer_data_holder.data.take_first();
// 2. If the interface identified by interfaceName is not exposed in targetRealm, then throw a "DataCloneError" DOMException.
if (!is_interface_exposed_on_target_realm(interface_name, target_realm))