170 lines
6.0 KiB
C++
170 lines
6.0 KiB
C++
/*******************************************************************************
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* Copyright (C) 2017, 2018 MINRES Technologies GmbH
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*******************************************************************************/
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#include "sysc/sc_comm_singleton.h"
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#include "seasocks/PrintfLogger.h"
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#include "seasocks/ResponseWriter.h"
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#include "seasocks/Server.h"
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#include "seasocks/StringUtil.h"
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#include "seasocks/util/CrackedUriPageHandler.h"
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#include "seasocks/util/Json.h"
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#include "seasocks/util/RootPageHandler.h"
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#include "seasocks/util/StaticResponseHandler.h"
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#include <cerrno>
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#include <csignal>
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#include <cstdio>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <unistd.h>
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namespace sysc {
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using namespace seasocks;
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using namespace std;
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namespace {
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inline void die() {
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perror(nullptr);
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exit(errno);
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}
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}
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sc_comm_singleton::sc_comm_singleton(sc_core::sc_module_name nm)
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: sc_core::sc_module(nm)
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, m_serv(new Server(std::make_shared<PrintfLogger>(Logger::Level::WARNING)))
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, needs_client(false)
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, client_started(false) {
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m_serv->addPageHandler(std::make_shared<DefaultPageHandler>(*this));
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}
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sc_comm_singleton::~sc_comm_singleton() {
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// Join the thread with the main thread
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t.join();
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}
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void sc_comm_singleton::start_of_simulation() {
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// Launch a thread
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t = std::thread(&sc_comm_singleton::thread_func, this);
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if (needs_client) start_client();
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}
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void sc_comm_singleton::end_of_simulation() { get_server().terminate(); }
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void sc_comm_singleton::start_client() {
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if (client_started) return;
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std::stringstream ss;
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#ifndef WIN32
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if (fork() == 0) {
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// daemonizing, see http://www.microhowto.info/howto/cause_a_process_to_become_a_daemon_in_c.html#id2407077
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// Fork, allowing the parent process to terminate.
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pid_t pid = fork();
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if (pid == -1) {
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die();
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} else if (pid != 0) {
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_exit(0);
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}
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// Start a new session for the daemon.
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if (setsid() == -1) die();
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// Fork again, allowing the parent process to terminate.
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signal(SIGHUP, SIG_IGN);
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pid = fork();
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if (pid == -1) {
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die();
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} else if (pid != 0) {
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_exit(0);
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}
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// Set the current working directory to the root directory.
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if (chdir("/") == -1) die();
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// Set the user file creation mask to zero.
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umask(0);
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// Close then reopen standard file descriptors.
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close(STDIN_FILENO);
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close(STDOUT_FILENO);
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close(STDERR_FILENO);
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if (open("/dev/null", O_RDONLY) == -1) die();
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if (open("/dev/null", O_WRONLY) == -1) die();
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if (open("/dev/null", O_RDWR) == -1) die();
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// now do what is needed
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ss << "x-www-browser http://localhost:9090/ws.html"; // Linux
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auto res = system(ss.str().c_str());
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if (res == 0) exit(0);
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ss.str("");
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ss << "xdg-open http://localhost:9090/ws.html"; // Linux
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res = system(ss.str().c_str());
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if (res == 0) exit(0);
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ss.str("");
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ss << "open http://localhost:9090/ws.html"; // MacOS
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res = system(ss.str().c_str());
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exit(0);
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}
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// #else
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// on windows should be open, see https://www.experts-exchange.com/articles/1595/Execute-a-Program-with-C.html
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#endif
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client_started = true;
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}
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void sc_comm_singleton::registerWebSocketHandler(const char *endpoint, std::shared_ptr<WebSocket::Handler> handler,
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bool allowCrossOriginRequests) {
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get_server().addWebSocketHandler(endpoint, handler, allowCrossOriginRequests);
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endpoints.emplace_back(endpoint);
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needs_client = true;
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}
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void sc_comm_singleton::execute(std::function<void()> f) { get_server().execute(f); }
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void sc_comm_singleton::thread_func() { get_server().serve("./html", 9090); }
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Server &sc_comm_singleton::get_server() { return *m_serv.get(); }
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std::shared_ptr<Response> sc_comm_singleton::DefaultPageHandler::handle(const Request &request) {
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if (request.verb() == Request::Verb::Get && request.getRequestUri() == "conf.json") {
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return Response::htmlResponse("{}");
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}
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return Response::unhandled();
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}
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void WsHandler::onConnect(WebSocket *connection) { _connections.insert(connection); }
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void WsHandler::onData(WebSocket *connection, const char *data) {
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if (0 == strcmp("close", data)) {
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connection->close();
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} else if (callback)
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callback(data);
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}
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void WsHandler::onDisconnect(WebSocket *connection) { _connections.erase(connection); }
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} /* namespace sysc */
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