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#include <core.h>
#include <session.h>
#include <fcntl.h>
#include <fileUtils.h>
#include <sys.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <factory.impl.h>
#include <boost/filesystem/operations.hpp>
#include <boost/uuid/uuid_generators.hpp>
#include <boost/uuid/uuid_io.hpp>
#include <Ice/OutputStream.h>
#include <Ice/InputStream.h>
#include "Ice/Initialize.h"
namespace IceSpider {
class FileSessions : public Plugin, public SessionManager {
public:
FileSessions(Ice::CommunicatorPtr c, Ice::PropertiesPtr p) :
ic(c),
root(p->getProperty("IceSpider.FileSessions.Path")),
duration(p->getPropertyAsIntWithDefault("IceSpider.FileSessions.Duration", 3600))
{
if (!root.empty())
if (!boost::filesystem::exists(root))
boost::filesystem::create_directories(root);
}
~FileSessions()
{
removeExpired();
}
SessionPtr createSession(const ::Ice::Current &) override
{
auto s = std::make_shared<Session>();
s->id = boost::lexical_cast<std::string>(boost::uuids::random_generator()());
s->duration = duration;
save(s);
return s;
}
SessionPtr getSession(const ::std::string id, const ::Ice::Current & current) override
{
auto s = load(id);
if (s && isExpired(s)) {
destroySession(id, current);
return NULL;
}
return s;
}
void updateSession(const SessionPtr s, const ::Ice::Current &) override
{
save(s);
}
void destroySession(const ::std::string id, const ::Ice::Current &) override
{
try {
boost::filesystem::remove(root / id);
}
catch (const std::exception & e) {
throw SessionError(e.what());
}
}
private:
void save(SessionPtr s)
{
s->lastUsed = time(NULL);
Ice::OutputStream buf(ic);
buf.write(s);
auto range = buf.finished();
AdHoc::FileUtils::FileHandle f(root / s->id, O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);
sysassert(flock(f.fh, LOCK_EX), -1);
sysassert(pwrite(f.fh, range.first, range.second - range.first, 0), -1);
sysassert(ftruncate(f.fh, range.second - range.first), -1);
sysassert(flock(f.fh, LOCK_UN), -1);
}
SessionPtr load(const std::string & id)
{
auto path = root / id;
if (!boost::filesystem::exists(path)) return NULL;
try {
AdHoc::FileUtils::MemMap f(path);
sysassert(flock(f.fh, LOCK_SH), -1);
auto fbuf = (Ice::Byte *)f.data;
Ice::InputStream buf(ic, std::make_pair(fbuf, fbuf + f.getStat().st_size));
SessionPtr s;
buf.read(s);
sysassert(flock(f.fh, LOCK_UN), -1);
return s;
}
catch (const AdHoc::SystemException & e) {
if (e.errNo == ENOENT) {
return NULL;
}
throw;
}
}
void removeExpired()
{
if (root.empty() || !boost::filesystem::exists(root)) return;
boost::filesystem::directory_iterator di(root);
while (di != boost::filesystem::directory_iterator()) {
auto s = load(di->path().leaf().string());
if (s && isExpired(s)) {
destroySession(s->id, Ice::Current());
}
di++;
}
}
bool isExpired(SessionPtr s)
{
return (s->lastUsed + s->duration < time(NULL));
}
template<typename R, typename ER>
R sysassert(R rtn, ER ertn)
{
if (rtn == ertn) {
fprintf(stderr, "%s\n", strerror(errno));
throw SessionError(strerror(errno));
}
return rtn;
}
Ice::CommunicatorPtr ic;
const boost::filesystem::path root;
const Ice::Int duration;
};
}
NAMEDFACTORY("IceSpider-FileSessions", IceSpider::FileSessions, IceSpider::PluginFactory);
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