154 lines
4.0 KiB
C++
154 lines
4.0 KiB
C++
/*
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* sc_singleton.cpp
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*
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* Created on: 09.10.2017
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* Author: eyck
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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/Server.h"
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#include "seasocks/StringUtil.h"
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#include "seasocks/util/Json.h"
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#include "seasocks/ResponseWriter.h"
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#include "seasocks/util/RootPageHandler.h"
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#include "seasocks/util/CrackedUriPageHandler.h"
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#include "seasocks/util/StaticResponseHandler.h"
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#include <cstdio>
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#include <csignal>
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#include <sys/stat.h>
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#include <cerrno>
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#include <fcntl.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(){perror(nullptr);exit(errno);}
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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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, 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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start_client();
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}
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void sc_comm_singleton::end_of_simulation() {
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get_server().terminate();
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}
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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,
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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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}
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void sc_comm_singleton::execute(std::function<void()> f) {
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get_server().execute(f);
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}
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void sc_comm_singleton::thread_func() {
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get_server().serve("./html", 9090);
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}
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Server& sc_comm_singleton::get_server() {
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return *m_serv.get();
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}
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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) {
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_connections.insert(connection);
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//connection->send("Connection established");;
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}
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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) {
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_connections.erase(connection);
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}
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} /* namespace sysc */
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