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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_net_NullHttpTransaction_h
#define mozilla_net_NullHttpTransaction_h
#include "nsAHttpTransaction.h"
#include "mozilla/Attributes.h"
#include "TimingStruct.h"
// This is the minimal nsAHttpTransaction implementation. A NullHttpTransaction
// can be used to drive connection level semantics (such as SSL handshakes
// tunnels) so that a nsHttpConnection becomes fully established in
// anticipation of a real transaction needing to use it soon.
class nsIHttpActivityObserver;
namespace mozilla { namespace net {
class nsAHttpConnection;
class nsHttpConnectionInfo;
class nsHttpRequestHead;
// 6c445340-3b82-4345-8efa-4902c3b8805a
#define NS_NULLHTTPTRANSACTION_IID \
{ 0x6c445340, 0x3b82, 0x4345, {0x8e, 0xfa, 0x49, 0x02, 0xc3, 0xb8, 0x80, 0x5a }}
class NullHttpTransaction : public nsAHttpTransaction
{
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_NULLHTTPTRANSACTION_IID)
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSAHTTPTRANSACTION
NullHttpTransaction(nsHttpConnectionInfo *ci,
nsIInterfaceRequestor *callbacks,
uint32_t caps);
bool Claim();
// Overload of nsAHttpTransaction methods
bool IsNullTransaction() override final { return true; }
NullHttpTransaction *QueryNullTransaction() override final { return this; }
bool ResponseTimeoutEnabled() const override final {return true; }
PRIntervalTime ResponseTimeout() override final
{
return PR_SecondsToInterval(15);
}
TimingStruct Timings() { return mTimings; }
protected:
virtual ~NullHttpTransaction();
private:
nsresult mStatus;
protected:
uint32_t mCaps;
nsHttpRequestHead *mRequestHead;
private:
// mCapsToClear holds flags that should be cleared in mCaps, e.g. unset
// NS_HTTP_REFRESH_DNS when DNS refresh request has completed to avoid
// redundant requests on the network. The member itself is atomic, but
// access to it from the networking thread may happen either before or
// after the main thread modifies it. To deal with raciness, only unsetting
// bitfields should be allowed: 'lost races' will thus err on the
// conservative side, e.g. by going ahead with a 2nd DNS refresh.
Atomic<uint32_t> mCapsToClear;
bool mIsDone;
bool mClaimed;
TimingStruct mTimings;
protected:
RefPtr<nsAHttpConnection> mConnection;
nsCOMPtr<nsIInterfaceRequestor> mCallbacks;
RefPtr<nsHttpConnectionInfo> mConnectionInfo;
nsCOMPtr<nsIHttpActivityObserver> mActivityDistributor;
};
NS_DEFINE_STATIC_IID_ACCESSOR(NullHttpTransaction, NS_NULLHTTPTRANSACTION_IID)
} // namespace net
} // namespace mozilla
#endif // mozilla_net_NullHttpTransaction_h
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