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#include <Ice/Communicator.h>
#include <Ice/Config.h>
#include <Ice/Current.h>
#include <Ice/InputStream.h>
#include <Ice/OutputStream.h>
#include <Ice/Properties.h>
#include <Ice/PropertiesF.h>
#include <boost/lexical_cast.hpp>
#include <boost/uuid/random_generator.hpp>
#include <boost/uuid/uuid_io.hpp>
#include <cerrno>
#include <core.h>
#include <cstring>
#include <ctime>
#include <exception>
#include <factory.impl.h>
#include <fileUtils.h>
#include <memory>
#include <session.h>
#include <string>
#include <string_view>
#include <sys.h>
#include <sys/file.h>
#include <unistd.h>
#include <utility>
namespace IceSpider {
class FileSessions : public Plugin, public SessionManager {
public:
FileSessions(Ice::CommunicatorPtr com, const Ice::PropertiesPtr & props) :
ic(std::move(com)), root(props->getProperty("IceSpider.FileSessions.Path")),
duration(static_cast<Ice::Short>(
props->getPropertyAsIntWithDefault("IceSpider.FileSessions.Duration", 3600)))
{
if (!root.empty() && !std::filesystem::exists(root)) {
std::filesystem::create_directories(root);
}
}
FileSessions(const FileSessions &) = delete;
FileSessions(FileSessions &&) = delete;
~FileSessions() override
{
try {
removeExpired();
}
catch (...) { // NOLINT(bugprone-empty-catch) - Meh :)
}
}
void operator=(const FileSessions &) = delete;
void operator=(FileSessions &&) = delete;
SessionPtr
createSession(const ::Ice::Current &) override
{
auto session = std::make_shared<Session>();
// NOLINTNEXTLINE(clang-analyzer-optin.cplusplus.VirtualCall)
session->id = boost::lexical_cast<std::string>(boost::uuids::random_generator()());
session->duration = duration;
save(session);
return session;
}
SessionPtr
getSession(const ::std::string sessionId, const ::Ice::Current & current) override
{
auto session = load(sessionId);
if (session && isExpired(session)) {
destroySession(sessionId, current);
return nullptr;
}
return session;
}
void
updateSession(const SessionPtr session, const ::Ice::Current &) override
{
save(session);
}
void
destroySession(const ::std::string sessionId, const ::Ice::Current &) override
{
try {
std::filesystem::remove(root / sessionId);
}
catch (const std::exception & e) {
throw SessionError(e.what());
}
}
private:
void
save(const SessionPtr & session)
{
session->lastUsed = time(nullptr);
Ice::OutputStream buf(ic);
buf.write(session);
const auto range = buf.finished();
// NOLINTNEXTLINE(hicpp-signed-bitwise)
AdHoc::FileUtils::FileHandle sessionFile(root / session->id, O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);
sysassert(flock(sessionFile.fh, LOCK_EX), -1);
sysassert(pwrite(sessionFile.fh, range.first, static_cast<size_t>(range.second - range.first), 0), -1);
sysassert(ftruncate(sessionFile.fh, range.second - range.first), -1);
sysassert(flock(sessionFile.fh, LOCK_UN), -1);
}
SessionPtr
load(const std::string & sessionId)
{
auto path = root / sessionId;
if (!std::filesystem::exists(path)) {
return nullptr;
}
try {
AdHoc::FileUtils::MemMap sessionFile(path);
sysassert(flock(sessionFile.fh, LOCK_SH), -1);
auto fbuf = sessionFile.sv<Ice::Byte>();
Ice::InputStream buf(ic, std::make_pair(fbuf.begin(), fbuf.end()));
SessionPtr session;
buf.read(session);
sysassert(flock(sessionFile.fh, LOCK_UN), -1);
return session;
}
catch (const AdHoc::SystemException & e) {
if (e.errNo == ENOENT) {
return nullptr;
}
throw;
}
}
void
removeExpired()
{
if (root.empty() || !std::filesystem::exists(root)) {
return;
}
std::filesystem::directory_iterator dirIter(root);
while (dirIter != std::filesystem::directory_iterator()) {
auto session = load(dirIter->path());
if (session && isExpired(session)) {
FileSessions::destroySession(session->id, Ice::Current());
}
dirIter++;
}
}
[[nodiscard]]
static bool
isExpired(const SessionPtr & session)
{
return (session->lastUsed + session->duration < time(nullptr));
}
template<typename R, typename ER>
R
sysassert(R rtn, ER ertn)
{
if (rtn == ertn) {
throw SessionError(strerror(errno));
}
return rtn;
}
Ice::CommunicatorPtr ic;
const std::filesystem::path root;
const Ice::Short duration;
};
}
NAMEDFACTORY("IceSpider-FileSessions", IceSpider::FileSessions, IceSpider::PluginFactory);
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