[WebSocket] Refactor websocket module.

This commit is a huge refactor of the websocket module.
The module is really old, and some design choices had to be
re-evaluated.

The WebSocketClient and WebSocketServer classes are now gone, and
WebSocketPeer can act as either client or server.
The WebSocketMultiplayerPeer class is no longer abstract, and implements
the Multiplayer API on top of the lower level WebSocketPeer.

WebSocketPeer is now a "raw" peer, like StreamPeerTCP and StreamPeerTLS,
so it emits no signal, and just needs polling to update its internal
state.

To use it as a client, simply call WebSocketPeer.coonect_to_url, then
frequently poll the peer until STATE_OPEN is reached and then you can
write or read from it, or STATE_CLOSED and then you can check the
disconnect code and reason).

To implement a server instead, a TCPServer must be created, and the
accepted connections needs to be provided to
WebSocketPeer.accept_stream (which will perform the HTTP handshake).

A full example of a WebSocketServer using TLS will be provided in the
demo repository.

1 files changed, 0 insertions, 159 deletions

diff --git a/modules/websocket/emws_client.cpp b/modules/websocket/emws_client.cpp
deleted file mode 100644
index 933a1f43e9..0000000000
--- a/modules/websocket/emws_client.cpp
+++ /dev/null
@@ -1,159 +0,0 @@
-/*************************************************************************/
-/*  emws_client.cpp                                                      */
-/*************************************************************************/
-/*                       This file is part of:                           */
-/*                           GODOT ENGINE                                */
-/*                      https://godotengine.org                          */
-/*************************************************************************/
-/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
-/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
-/*                                                                       */
-/* Permission is hereby granted, free of charge, to any person obtaining */
-/* a copy of this software and associated documentation files (the       */
-/* "Software"), to deal in the Software without restriction, including   */
-/* without limitation the rights to use, copy, modify, merge, publish,   */
-/* distribute, sublicense, and/or sell copies of the Software, and to    */
-/* permit persons to whom the Software is furnished to do so, subject to */
-/* the following conditions:                                             */
-/*                                                                       */
-/* The above copyright notice and this permission notice shall be        */
-/* included in all copies or substantial portions of the Software.       */
-/*                                                                       */
-/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
-/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
-/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
-/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
-/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
-/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
-/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
-/*************************************************************************/
-
-#ifdef WEB_ENABLED
-
-#include "emws_client.h"
-
-#include "core/config/project_settings.h"
-#include "core/io/ip.h"
-#include "emscripten.h"
-
-void EMWSClient::_esws_on_connect(void *obj, char *proto) {
-	EMWSClient *client = static_cast<EMWSClient *>(obj);
-	client->_is_connecting = false;
-	client->_on_connect(String(proto));
-}
-
-void EMWSClient::_esws_on_message(void *obj, const uint8_t *p_data, int p_data_size, int p_is_string) {
-	EMWSClient *client = static_cast<EMWSClient *>(obj);
-
-	Error err = static_cast<EMWSPeer *>(*client->get_peer(1))->read_msg(p_data, p_data_size, p_is_string == 1);
-	if (err == OK) {
-		client->_on_peer_packet();
-	}
-}
-
-void EMWSClient::_esws_on_error(void *obj) {
-	EMWSClient *client = static_cast<EMWSClient *>(obj);
-	client->_is_connecting = false;
-	client->_on_error();
-}
-
-void EMWSClient::_esws_on_close(void *obj, int code, const char *reason, int was_clean) {
-	EMWSClient *client = static_cast<EMWSClient *>(obj);
-	client->_on_close_request(code, String(reason));
-	client->_is_connecting = false;
-	client->disconnect_from_host();
-	client->_on_disconnect(was_clean != 0);
-}
-
-Error EMWSClient::connect_to_host(String p_host, String p_path, uint16_t p_port, bool p_tls, const Vector<String> p_protocols, const Vector<String> p_custom_headers) {
-	if (_js_id) {
-		godot_js_websocket_destroy(_js_id);
-		_js_id = 0;
-	}
-
-	String proto_string;
-	for (int i = 0; i < p_protocols.size(); i++) {
-		if (i != 0) {
-			proto_string += ",";
-		}
-		proto_string += p_protocols[i];
-	}
-
-	String str = "ws://";
-
-	if (p_custom_headers.size()) {
-		WARN_PRINT_ONCE("Custom headers are not supported in Web platform.");
-	}
-	if (p_tls) {
-		str = "wss://";
-		if (tls_cert.is_valid()) {
-			WARN_PRINT_ONCE("Custom SSL certificate is not supported in Web platform.");
-		}
-	}
-	str += p_host + ":" + itos(p_port) + p_path;
-	_is_connecting = true;
-
-	_js_id = godot_js_websocket_create(this, str.utf8().get_data(), proto_string.utf8().get_data(), &_esws_on_connect, &_esws_on_message, &_esws_on_error, &_esws_on_close);
-	if (!_js_id) {
-		return FAILED;
-	}
-
-	static_cast<Ref<EMWSPeer>>(_peer)->set_sock(_js_id, _in_buf_size, _in_pkt_size, _out_buf_size);
-
-	return OK;
-}
-
-void EMWSClient::poll() {
-}
-
-Ref<WebSocketPeer> EMWSClient::get_peer(int p_peer_id) const {
-	return _peer;
-}
-
-MultiplayerPeer::ConnectionStatus EMWSClient::get_connection_status() const {
-	if (_peer->is_connected_to_host()) {
-		if (_is_connecting) {
-			return CONNECTION_CONNECTING;
-		}
-		return CONNECTION_CONNECTED;
-	}
-
-	return CONNECTION_DISCONNECTED;
-}
-
-void EMWSClient::disconnect_from_host(int p_code, String p_reason) {
-	_peer->close(p_code, p_reason);
-}
-
-IPAddress EMWSClient::get_connected_host() const {
-	ERR_FAIL_V_MSG(IPAddress(), "Not supported in Web export.");
-}
-
-uint16_t EMWSClient::get_connected_port() const {
-	ERR_FAIL_V_MSG(0, "Not supported in Web export.");
-}
-
-int EMWSClient::get_max_packet_size() const {
-	return (1 << _in_buf_size) - PROTO_SIZE;
-}
-
-Error EMWSClient::set_buffers(int p_in_buffer, int p_in_packets, int p_out_buffer, int p_out_packets) {
-	_in_buf_size = nearest_shift(p_in_buffer - 1) + 10;
-	_in_pkt_size = nearest_shift(p_in_packets - 1);
-	_out_buf_size = nearest_shift(p_out_buffer - 1) + 10;
-	return OK;
-}
-
-EMWSClient::EMWSClient() {
-	_peer = Ref<EMWSPeer>(memnew(EMWSPeer));
-}
-
-EMWSClient::~EMWSClient() {
-	disconnect_from_host();
-	_peer = Ref<EMWSPeer>();
-	if (_js_id) {
-		godot_js_websocket_destroy(_js_id);
-	}
-}
-
-#endif // WEB_ENABLED