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Ladybird: Add WebSocket server for use by Lagom networking

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Hide its use behind the same flag as RequestServer in WebContent.
This commit is contained in:
Andrew Kaster 2023-08-02 18:13:23 -06:00 • committed by Andreas Kling
parent dd694215bc
commit 7d7c419ce6
15 changed files with 162 additions and 32 deletions
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33
Ladybird/HelperProcess.cpp
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@ -87,36 +87,37 @@ ErrorOr<NonnullRefPtr<WebView::WebContentClient>> launch_web_content_process(Web
return new_client;
}
ErrorOr<NonnullRefPtr<Protocol::RequestClient>> launch_request_server_process(ReadonlySpan<String> candidate_request_server_paths, StringView serenity_resource_root)
template<typename Client>
ErrorOr<NonnullRefPtr<Client>> launch_generic_server_process(ReadonlySpan<String> candidate_server_paths, StringView serenity_resource_root, StringView server_name)
{
int socket_fds[2] {};
TRY(Core::System::socketpair(AF_LOCAL, SOCK_STREAM, 0, socket_fds));
int ui_fd = socket_fds[0];
int rc_fd = socket_fds[1];
int server_fd = socket_fds[1];
int fd_passing_socket_fds[2] {};
TRY(Core::System::socketpair(AF_LOCAL, SOCK_STREAM, 0, fd_passing_socket_fds));
int ui_fd_passing_fd = fd_passing_socket_fds[0];
int rc_fd_passing_fd = fd_passing_socket_fds[1];
int server_fd_passing_fd = fd_passing_socket_fds[1];
if (auto child_pid = TRY(Core::System::fork()); child_pid == 0) {
TRY(Core::System::close(ui_fd));
TRY(Core::System::close(ui_fd_passing_fd));
auto takeover_string = TRY(String::formatted("RequestServer:{}", rc_fd));
auto takeover_string = TRY(String::formatted("{}:{}", server_name, server_fd));
TRY(Core::System::setenv("SOCKET_TAKEOVER"sv, takeover_string, true));
auto fd_passing_socket_string = TRY(String::number(rc_fd_passing_fd));
auto fd_passing_socket_string = TRY(String::number(server_fd_passing_fd));
ErrorOr<void> result;
for (auto const& path : candidate_request_server_paths) {
for (auto const& path : candidate_server_paths) {
if (Core::System::access(path, X_OK).is_error())
continue;
auto arguments = Vector {
auto arguments = Vector<StringView, 5> {
path.bytes_as_string_view(),
"--fd-passing-socket"sv,
fd_passing_socket_string,
@ -130,18 +131,28 @@ ErrorOr<NonnullRefPtr<Protocol::RequestClient>> launch_request_server_process(Re
}
if (result.is_error())
warnln("Could not launch any of {}: {}", candidate_request_server_paths, result.error());
warnln("Could not launch any of {}: {}", candidate_server_paths, result.error());
VERIFY_NOT_REACHED();
}
TRY(Core::System::close(rc_fd));
TRY(Core::System::close(rc_fd_passing_fd));
TRY(Core::System::close(server_fd));
TRY(Core::System::close(server_fd_passing_fd));
auto socket = TRY(Core::LocalSocket::adopt_fd(ui_fd));
TRY(socket->set_blocking(true));
auto new_client = TRY(try_make_ref_counted<Protocol::RequestClient>(move(socket)));
auto new_client = TRY(try_make_ref_counted<Client>(move(socket)));
new_client->set_fd_passing_socket(TRY(Core::LocalSocket::adopt_fd(ui_fd_passing_fd)));
return new_client;
}
ErrorOr<NonnullRefPtr<Protocol::RequestClient>> launch_request_server_process(ReadonlySpan<String> candidate_request_server_paths, StringView serenity_resource_root)
{
return launch_generic_server_process<Protocol::RequestClient>(candidate_request_server_paths, serenity_resource_root, "RequestServer"sv);
}
ErrorOr<NonnullRefPtr<Protocol::WebSocketClient>> launch_web_socket_process(ReadonlySpan<String> candidate_web_socket_paths, StringView serenity_resource_root)
{
return launch_generic_server_process<Protocol::WebSocketClient>(candidate_web_socket_paths, serenity_resource_root, "WebSocket"sv);
}