[Web] Refactor Editor web server.

platform/web/export/editor_http_server.cpp

@@ -0,0 +1,255 @@
+/**************************************************************************/
+/*  editor_http_server.cpp                                                */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* 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.                 */
+/**************************************************************************/
+
+#include "editor_http_server.h"
+
+void EditorHTTPServer::_server_thread_poll(void *data) {
+	EditorHTTPServer *web_server = static_cast<EditorHTTPServer *>(data);
+	while (!web_server->server_quit.get()) {
+		OS::get_singleton()->delay_usec(6900);
+		{
+			MutexLock lock(web_server->server_lock);
+			web_server->_poll();
+		}
+	}
+}
+
+void EditorHTTPServer::_clear_client() {
+	peer = Ref<StreamPeer>();
+	tls = Ref<StreamPeerTLS>();
+	tcp = Ref<StreamPeerTCP>();
+	memset(req_buf, 0, sizeof(req_buf));
+	time = 0;
+	req_pos = 0;
+}
+
+void EditorHTTPServer::_set_internal_certs(Ref<Crypto> p_crypto) {
+	const String cache_path = EditorPaths::get_singleton()->get_cache_dir();
+	const String key_path = cache_path.path_join("html5_server.key");
+	const String crt_path = cache_path.path_join("html5_server.crt");
+	bool regen = !FileAccess::exists(key_path) || !FileAccess::exists(crt_path);
+	if (!regen) {
+		key = Ref<CryptoKey>(CryptoKey::create());
+		cert = Ref<X509Certificate>(X509Certificate::create());
+		if (key->load(key_path) != OK || cert->load(crt_path) != OK) {
+			regen = true;
+		}
+	}
+	if (regen) {
+		key = p_crypto->generate_rsa(2048);
+		key->save(key_path);
+		cert = p_crypto->generate_self_signed_certificate(key, "CN=godot-debug.local,O=A Game Dev,C=XXA", "20140101000000", "20340101000000");
+		cert->save(crt_path);
+	}
+}
+
+void EditorHTTPServer::_send_response() {
+	Vector<String> psa = String((char *)req_buf).split("\r\n");
+	int len = psa.size();
+	ERR_FAIL_COND_MSG(len < 4, "Not enough response headers, got: " + itos(len) + ", expected >= 4.");
+
+	Vector<String> req = psa[0].split(" ", false);
+	ERR_FAIL_COND_MSG(req.size() < 2, "Invalid protocol or status code.");
+
+	// Wrong protocol
+	ERR_FAIL_COND_MSG(req[0] != "GET" || req[2] != "HTTP/1.1", "Invalid method or HTTP version.");
+
+	const int query_index = req[1].find_char('?');
+	const String path = (query_index == -1) ? req[1] : req[1].substr(0, query_index);
+
+	const String req_file = path.get_file();
+	const String req_ext = path.get_extension();
+	const String cache_path = EditorPaths::get_singleton()->get_cache_dir().path_join("web");
+	const String filepath = cache_path.path_join(req_file);
+
+	if (!mimes.has(req_ext) || !FileAccess::exists(filepath)) {
+		String s = "HTTP/1.1 404 Not Found\r\n";
+		s += "Connection: Close\r\n";
+		s += "\r\n";
+		CharString cs = s.utf8();
+		peer->put_data((const uint8_t *)cs.get_data(), cs.size() - 1);
+		return;
+	}
+	const String ctype = mimes[req_ext];
+
+	Ref<FileAccess> f = FileAccess::open(filepath, FileAccess::READ);
+	ERR_FAIL_COND(f.is_null());
+	String s = "HTTP/1.1 200 OK\r\n";
+	s += "Connection: Close\r\n";
+	s += "Content-Type: " + ctype + "\r\n";
+	s += "Access-Control-Allow-Origin: *\r\n";
+	s += "Cross-Origin-Opener-Policy: same-origin\r\n";
+	s += "Cross-Origin-Embedder-Policy: require-corp\r\n";
+	s += "Cache-Control: no-store, max-age=0\r\n";
+	s += "\r\n";
+	CharString cs = s.utf8();
+	Error err = peer->put_data((const uint8_t *)cs.get_data(), cs.size() - 1);
+	if (err != OK) {
+		ERR_FAIL();
+	}
+
+	while (true) {
+		uint8_t bytes[4096];
+		uint64_t read = f->get_buffer(bytes, 4096);
+		if (read == 0) {
+			break;
+		}
+		err = peer->put_data(bytes, read);
+		if (err != OK) {
+			ERR_FAIL();
+		}
+	}
+}
+
+void EditorHTTPServer::_poll() {
+	if (!server->is_listening()) {
+		return;
+	}
+	if (tcp.is_null()) {
+		if (!server->is_connection_available()) {
+			return;
+		}
+		tcp = server->take_connection();
+		peer = tcp;
+		time = OS::get_singleton()->get_ticks_usec();
+	}
+	if (OS::get_singleton()->get_ticks_usec() - time > 1000000) {
+		_clear_client();
+		return;
+	}
+	if (tcp->get_status() != StreamPeerTCP::STATUS_CONNECTED) {
+		return;
+	}
+
+	if (use_tls) {
+		if (tls.is_null()) {
+			tls = Ref<StreamPeerTLS>(StreamPeerTLS::create());
+			peer = tls;
+			if (tls->accept_stream(tcp, TLSOptions::server(key, cert)) != OK) {
+				_clear_client();
+				return;
+			}
+		}
+		tls->poll();
+		if (tls->get_status() == StreamPeerTLS::STATUS_HANDSHAKING) {
+			// Still handshaking, keep waiting.
+			return;
+		}
+		if (tls->get_status() != StreamPeerTLS::STATUS_CONNECTED) {
+			_clear_client();
+			return;
+		}
+	}
+
+	while (true) {
+		char *r = (char *)req_buf;
+		int l = req_pos - 1;
+		if (l > 3 && r[l] == '\n' && r[l - 1] == '\r' && r[l - 2] == '\n' && r[l - 3] == '\r') {
+			_send_response();
+			_clear_client();
+			return;
+		}
+
+		int read = 0;
+		ERR_FAIL_COND(req_pos >= 4096);
+		Error err = peer->get_partial_data(&req_buf[req_pos], 1, read);
+		if (err != OK) {
+			// Got an error
+			_clear_client();
+			return;
+		} else if (read != 1) {
+			// Busy, wait next poll
+			return;
+		}
+		req_pos += read;
+	}
+}
+
+void EditorHTTPServer::stop() {
+	server_quit.set(true);
+	if (server_thread.is_started()) {
+		server_thread.wait_to_finish();
+	}
+	if (server.is_valid()) {
+		server->stop();
+	}
+	_clear_client();
+}
+
+Error EditorHTTPServer::listen(int p_port, IPAddress p_address, bool p_use_tls, String p_tls_key, String p_tls_cert) {
+	MutexLock lock(server_lock);
+	if (server->is_listening()) {
+		return ERR_ALREADY_IN_USE;
+	}
+	use_tls = p_use_tls;
+	if (use_tls) {
+		Ref<Crypto> crypto = Crypto::create();
+		if (crypto.is_null()) {
+			return ERR_UNAVAILABLE;
+		}
+		if (!p_tls_key.is_empty() && !p_tls_cert.is_empty()) {
+			key = Ref<CryptoKey>(CryptoKey::create());
+			Error err = key->load(p_tls_key);
+			ERR_FAIL_COND_V(err != OK, err);
+			cert = Ref<X509Certificate>(X509Certificate::create());
+			err = cert->load(p_tls_cert);
+			ERR_FAIL_COND_V(err != OK, err);
+		} else {
+			_set_internal_certs(crypto);
+		}
+	}
+	Error err = server->listen(p_port, p_address);
+	if (err == OK) {
+		server_quit.set(false);
+		server_thread.start(_server_thread_poll, this);
+	}
+	return err;
+}
+
+bool EditorHTTPServer::is_listening() const {
+	MutexLock lock(server_lock);
+	return server->is_listening();
+}
+
+EditorHTTPServer::EditorHTTPServer() {
+	mimes["html"] = "text/html";
+	mimes["js"] = "application/javascript";
+	mimes["json"] = "application/json";
+	mimes["pck"] = "application/octet-stream";
+	mimes["png"] = "image/png";
+	mimes["svg"] = "image/svg";
+	mimes["wasm"] = "application/wasm";
+	server.instantiate();
+	stop();
+}
+
+EditorHTTPServer::~EditorHTTPServer() {
+	stop();
+}