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/*************************************************************************/
/* 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 = DEF_BUF_SHIFT;
_in_pkt_size = DEF_PKT_SHIFT;
_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
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