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#include "http_proxy.h"
#include "http_proxy_sock_impl.h"
namespace NHttp {
using namespace NActors;
template <typename TSocketImpl>
class TIncomingConnectionActor : public TActor<TIncomingConnectionActor<TSocketImpl>>, public TSocketImpl, virtual public THttpConfig {
public:
using TBase = TActor<TIncomingConnectionActor<TSocketImpl>>;
static constexpr bool RecycleRequests = true;
std::shared_ptr<TPrivateEndpointInfo> Endpoint;
SocketAddressType Address;
TList<THttpIncomingRequestPtr> Requests;
THashMap<THttpIncomingRequestPtr, THttpOutgoingResponsePtr> Responses;
THttpIncomingRequestPtr CurrentRequest;
THttpOutgoingResponsePtr CurrentResponse;
TDeque<THttpIncomingRequestPtr> RecycledRequests;
THPTimer InactivityTimer;
static constexpr TDuration InactivityTimeout = TDuration::Minutes(2);
TEvPollerReady* InactivityEvent = nullptr;
TPollerToken::TPtr PollerToken;
TIncomingConnectionActor(
std::shared_ptr<TPrivateEndpointInfo> endpoint,
TIntrusivePtr<TSocketDescriptor> socket,
SocketAddressType address,
THttpIncomingRequestPtr recycledRequest = nullptr)
: TBase(&TIncomingConnectionActor::StateAccepting)
, TSocketImpl(std::move(socket))
, Endpoint(std::move(endpoint))
, Address(address)
{
if (recycledRequest != nullptr) {
RecycledRequests.emplace_back(std::move(recycledRequest));
}
TSocketImpl::SetNonBlock();
}
static constexpr char ActorName[] = "IN_CONNECTION_ACTOR";
void CleanupRequest(THttpIncomingRequestPtr& request) {
if (RecycleRequests) {
request->Clear();
RecycledRequests.push_back(std::move(request));
} else {
request = nullptr;
}
}
void CleanupResponse(THttpOutgoingResponsePtr& response) {
CleanupRequest(response->Request);
// TODO: maybe recycle too?
response = nullptr;
}
TAutoPtr<IEventHandle> AfterRegister(const TActorId& self, const TActorId& parent) override {
return new IEventHandle(self, parent, new TEvents::TEvBootstrap());
}
void Die(const TActorContext& ctx) override {
ctx.Send(Endpoint->Owner, new TEvHttpProxy::TEvHttpConnectionClosed(ctx.SelfID, std::move(RecycledRequests)));
TSocketImpl::Shutdown();
TBase::Die(ctx);
}
protected:
void Bootstrap(const TActorContext& ctx) {
InactivityTimer.Reset();
ctx.Schedule(InactivityTimeout, InactivityEvent = new TEvPollerReady(nullptr, false, false));
LOG_DEBUG_S(ctx, HttpLog, "(#" << TSocketImpl::GetRawSocket() << "," << Address << ") incoming connection opened");
OnAccept(ctx);
}
void OnAccept(const NActors::TActorContext& ctx) {
int res;
bool read = false, write = false;
for (;;) {
if ((res = TSocketImpl::OnAccept(Endpoint, read, write)) != 1) {
if (-res == EAGAIN) {
if (PollerToken && PollerToken->RequestReadNotificationAfterWouldBlock()) {
continue;
}
return; // wait for further notifications
} else {
LOG_ERROR_S(ctx, HttpLog, "(#" << TSocketImpl::GetRawSocket() << "," << Address << ") connection closed - error in Accept: " << strerror(-res));
return Die(ctx);
}
}
break;
}
TBase::Become(&TIncomingConnectionActor::StateConnected);
ctx.Send(ctx.SelfID, new TEvPollerReady(nullptr, true, true));
}
void HandleAccepting(TEvPollerRegisterResult::TPtr ev, const NActors::TActorContext& ctx) {
PollerToken = std::move(ev->Get()->PollerToken);
OnAccept(ctx);
}
void HandleAccepting(NActors::TEvPollerReady::TPtr, const NActors::TActorContext& ctx) {
OnAccept(ctx);
}
void HandleConnected(TEvPollerReady::TPtr event, const TActorContext& ctx) {
if (event->Get()->Read) {
for (;;) {
if (CurrentRequest == nullptr) {
if (RecycleRequests && !RecycledRequests.empty()) {
CurrentRequest = std::move(RecycledRequests.front());
RecycledRequests.pop_front();
CurrentRequest->Address = Address;
CurrentRequest->Endpoint = Endpoint;
} else {
CurrentRequest = new THttpIncomingRequest(Endpoint, Address);
}
}
if (!CurrentRequest->EnsureEnoughSpaceAvailable()) {
LOG_DEBUG_S(ctx, HttpLog, "(#" << TSocketImpl::GetRawSocket() << "," << Address << ") connection closed - not enough space available");
return Die(ctx);
}
ssize_t need = CurrentRequest->Avail();
bool read = false, write = false;
ssize_t res = TSocketImpl::Recv(CurrentRequest->Pos(), need, read, write);
if (res > 0) {
InactivityTimer.Reset();
CurrentRequest->Advance(res);
if (CurrentRequest->IsDone()) {
Requests.emplace_back(CurrentRequest);
CurrentRequest->Timer.Reset();
if (CurrentRequest->IsReady()) {
LOG_DEBUG_S(ctx, HttpLog, "(#" << TSocketImpl::GetRawSocket() << "," << Address << ") -> (" << CurrentRequest->Method << " " << CurrentRequest->URL << ")");
ctx.Send(Endpoint->Proxy, new TEvHttpProxy::TEvHttpIncomingRequest(CurrentRequest));
CurrentRequest = nullptr;
} else if (CurrentRequest->IsError()) {
LOG_DEBUG_S(ctx, HttpLog, "(#" << TSocketImpl::GetRawSocket() << "," << Address << ") -! (" << CurrentRequest->Method << " " << CurrentRequest->URL << ")");
bool success = Respond(CurrentRequest->CreateResponseBadRequest(), ctx);
if (!success) {
return;
}
CurrentRequest = nullptr;
}
}
} else if (-res == EAGAIN || -res == EWOULDBLOCK) {
if (PollerToken) {
if (!read && !write) {
read = true;
}
if (PollerToken->RequestNotificationAfterWouldBlock(read, write)) {
continue;
}
}
break;
} else if (-res == EINTR) {
continue;
} else if (!res) {
// connection closed
LOG_DEBUG_S(ctx, HttpLog, "(#" << TSocketImpl::GetRawSocket() << "," << Address << ") connection closed");
return Die(ctx);
} else {
LOG_ERROR_S(ctx, HttpLog, "(#" << TSocketImpl::GetRawSocket() << "," << Address << ") connection closed - error in Receive: " << strerror(-res));
return Die(ctx);
}
}
}
if (event->Get() == InactivityEvent) {
const TDuration passed = TDuration::Seconds(std::abs(InactivityTimer.Passed()));
if (passed >= InactivityTimeout) {
LOG_DEBUG_S(ctx, HttpLog, "(#" << TSocketImpl::GetRawSocket() << "," << Address << ") connection closed by inactivity timeout");
return Die(ctx); // timeout
} else {
ctx.Schedule(InactivityTimeout - passed, InactivityEvent = new TEvPollerReady(nullptr, false, false));
}
}
if (event->Get()->Write) {
FlushOutput(ctx);
}
}
void HandleConnected(TEvPollerRegisterResult::TPtr ev, const TActorContext& /*ctx*/) {
PollerToken = std::move(ev->Get()->PollerToken);
PollerToken->Request(true, true);
}
void HandleConnected(TEvHttpProxy::TEvHttpOutgoingResponse::TPtr event, const TActorContext& ctx) {
Respond(event->Get()->Response, ctx);
}
bool Respond(THttpOutgoingResponsePtr response, const TActorContext& ctx) {
THttpIncomingRequestPtr request = response->GetRequest();
response->Finish();
LOG_DEBUG_S(ctx, HttpLog, "(#" << TSocketImpl::GetRawSocket() << "," << Address << ") <- (" << response->Status << " " << response->Message << ")");
if (!response->Status.StartsWith('2') && response->Status != "404") {
static constexpr size_t MAX_LOGGED_SIZE = 1024;
LOG_DEBUG_S(ctx, HttpLog,
"(#"
<< TSocketImpl::GetRawSocket()
<< ","
<< Address
<< ") Request: "
<< request->GetObfuscatedData().substr(0, MAX_LOGGED_SIZE));
LOG_DEBUG_S(ctx, HttpLog,
"(#"
<< TSocketImpl::GetRawSocket()
<< ","
<< Address
<< ") Response: "
<< TString(response->GetRawData()).substr(0, MAX_LOGGED_SIZE));
}
THolder<TEvHttpProxy::TEvReportSensors> sensors(BuildIncomingRequestSensors(request, response));
ctx.Send(Endpoint->Owner, sensors.Release());
if (request == Requests.front() && CurrentResponse == nullptr) {
CurrentResponse = response;
return FlushOutput(ctx);
} else {
// we are ahead of our pipeline
Responses.emplace(request, response);
return true;
}
}
bool FlushOutput(const TActorContext& ctx) {
while (CurrentResponse != nullptr) {
size_t size = CurrentResponse->Size();
if (size == 0) {
Y_ABORT_UNLESS(Requests.front() == CurrentResponse->GetRequest());
bool close = CurrentResponse->IsConnectionClose();
Requests.pop_front();
CleanupResponse(CurrentResponse);
if (!Requests.empty()) {
auto it = Responses.find(Requests.front());
if (it != Responses.end()) {
CurrentResponse = it->second;
Responses.erase(it);
continue;
} else {
LOG_ERROR_S(ctx, HttpLog, "(#" << TSocketImpl::GetRawSocket() << "," << Address << ") connection closed - FlushOutput request not found");
Die(ctx);
return false;
}
} else {
if (close) {
LOG_DEBUG_S(ctx, HttpLog, "(#" << TSocketImpl::GetRawSocket() << "," << Address << ") connection closed");
Die(ctx);
return false;
} else {
continue;
}
}
}
bool read = false, write = false;
ssize_t res = TSocketImpl::Send(CurrentResponse->Data(), size, read, write);
if (res > 0) {
CurrentResponse->ChopHead(res);
} else if (-res == EINTR) {
continue;
} else if (-res == EAGAIN || -res == EWOULDBLOCK) {
if (PollerToken) {
if (!read && !write) {
write = true;
}
if (PollerToken->RequestNotificationAfterWouldBlock(read, write)) {
continue;
}
}
break;
} else {
CleanupResponse(CurrentResponse);
LOG_ERROR_S(ctx, HttpLog, "(#" << TSocketImpl::GetRawSocket() << "," << Address << ") connection closed - error in FlushOutput: " << strerror(-res));
Die(ctx);
return false;
}
}
return true;
}
STFUNC(StateAccepting) {
switch (ev->GetTypeRewrite()) {
CFunc(TEvents::TEvBootstrap::EventType, Bootstrap);
HFunc(TEvPollerReady, HandleAccepting);
HFunc(TEvPollerRegisterResult, HandleAccepting);
}
}
STFUNC(StateConnected) {
switch (ev->GetTypeRewrite()) {
HFunc(TEvPollerReady, HandleConnected);
HFunc(TEvHttpProxy::TEvHttpOutgoingResponse, HandleConnected);
HFunc(TEvPollerRegisterResult, HandleConnected);
}
}
};
IActor* CreateIncomingConnectionActor(
std::shared_ptr<TPrivateEndpointInfo> endpoint,
TIntrusivePtr<TSocketDescriptor> socket,
THttpConfig::SocketAddressType address,
THttpIncomingRequestPtr recycledRequest) {
if (endpoint->Secure) {
return new TIncomingConnectionActor<TSecureSocketImpl>(std::move(endpoint), std::move(socket), address, std::move(recycledRequest));
} else {
return new TIncomingConnectionActor<TPlainSocketImpl>(std::move(endpoint), std::move(socket), address, std::move(recycledRequest));
}
}
}
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