/*************************************************************************/ /* emws_client.cpp */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2020 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 JAVASCRIPT_ENABLED #include "emws_client.h" #include "core/io/ip.h" #include "core/project_settings.h" #include "emscripten.h" extern "C" { EMSCRIPTEN_KEEPALIVE void _esws_on_connect(void *obj, char *proto) { EMWSClient *client = static_cast<EMWSClient *>(obj); client->_is_connecting = false; client->_on_connect(String(proto)); } EMSCRIPTEN_KEEPALIVE void _esws_on_message(void *obj, 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(); } EMSCRIPTEN_KEEPALIVE void _esws_on_error(void *obj) { EMWSClient *client = static_cast<EMWSClient *>(obj); client->_is_connecting = false; client->_on_error(); } EMSCRIPTEN_KEEPALIVE void _esws_on_close(void *obj, int code, char *reason, int was_clean) { EMWSClient *client = static_cast<EMWSClient *>(obj); client->_on_close_request(code, String(reason)); client->_is_connecting = false; client->_on_disconnect(was_clean != 0); } } Error EMWSClient::connect_to_host(String p_host, String p_path, uint16_t p_port, bool p_ssl, const Vector<String> p_protocols, const Vector<String> p_custom_headers) { 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 in HTML5 platform."); } if (p_ssl) { str = "wss://"; if (ssl_cert.is_valid()) { WARN_PRINT_ONCE("Custom SSL certificate is not supported in HTML5 platform."); } } str += p_host + ":" + itos(p_port) + p_path; _is_connecting = true; /* clang-format off */ int peer_sock = EM_ASM_INT({ var proto_str = UTF8ToString($2); var socket = null; try { if (proto_str) { socket = new WebSocket(UTF8ToString($1), proto_str.split(",")); } else { socket = new WebSocket(UTF8ToString($1)); } } catch (e) { return -1; } var c_ptr = Module.IDHandler.get($0); socket.binaryType = "arraybuffer"; // Connection opened socket.addEventListener("open", function (event) { if (!Module.IDHandler.has($0)) return; // Godot Object is gone! ccall("_esws_on_connect", "void", ["number", "string"], [c_ptr, socket.protocol] ); }); // Listen for messages socket.addEventListener("message", function (event) { if (!Module.IDHandler.has($0)) return; // Godot Object is gone! var buffer; var is_string = 0; if (event.data instanceof ArrayBuffer) { buffer = new Uint8Array(event.data); } else if (event.data instanceof Blob) { alert("Blob type not supported"); return; } else if (typeof event.data === "string") { is_string = 1; var enc = new TextEncoder("utf-8"); buffer = new Uint8Array(enc.encode(event.data)); } else { alert("Unknown message type"); return; } var len = buffer.length*buffer.BYTES_PER_ELEMENT; var out = _malloc(len); HEAPU8.set(buffer, out); ccall("_esws_on_message", "void", ["number", "number", "number", "number"], [c_ptr, out, len, is_string] ); _free(out); }); socket.addEventListener("error", function (event) { if (!Module.IDHandler.has($0)) return; // Godot Object is gone! ccall("_esws_on_error", "void", ["number"], [c_ptr] ); }); socket.addEventListener("close", function (event) { if (!Module.IDHandler.has($0)) return; // Godot Object is gone! var was_clean = 0; if (event.wasClean) was_clean = 1; ccall("_esws_on_close", "void", ["number", "number", "string", "number"], [c_ptr, event.code, event.reason, was_clean] ); }); return Module.IDHandler.add(socket); }, _js_id, str.utf8().get_data(), proto_string.utf8().get_data()); /* clang-format on */ if (peer_sock == -1) return FAILED; static_cast<Ref<EMWSPeer> >(_peer)->set_sock(peer_sock, _in_buf_size, _in_pkt_size); return OK; }; void EMWSClient::poll() { } Ref<WebSocketPeer> EMWSClient::get_peer(int p_peer_id) const { return _peer; } NetworkedMultiplayerPeer::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); }; IP_Address EMWSClient::get_connected_host() const { ERR_FAIL_V_MSG(IP_Address(), "Not supported in HTML5 export."); }; uint16_t EMWSClient::get_connected_port() const { ERR_FAIL_V_MSG(0, "Not supported in HTML5 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); return OK; } EMWSClient::EMWSClient() { _in_buf_size = nearest_shift((int)GLOBAL_GET(WSC_IN_BUF) - 1) + 10; _in_pkt_size = nearest_shift((int)GLOBAL_GET(WSC_IN_PKT) - 1); _is_connecting = false; _peer = Ref<EMWSPeer>(memnew(EMWSPeer)); /* clang-format off */ _js_id = EM_ASM_INT({ return Module.IDHandler.add($0); }, this); /* clang-format on */ }; EMWSClient::~EMWSClient() { disconnect_from_host(); _peer = Ref<EMWSPeer>(); /* clang-format off */ EM_ASM({ Module.IDHandler.remove($0); }, _js_id); /* clang-format on */ }; #endif // JAVASCRIPT_ENABLED