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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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/. */
#include "mozilla/DebugOnly.h"
#include "nscore.h"
#include "nsRequestObserverProxy.h"
#include "nsIRequest.h"
#include "nsAutoPtr.h"
#include "mozilla/Logging.h"
namespace mozilla {
namespace net {
static LazyLogModule gRequestObserverProxyLog("nsRequestObserverProxy");
#undef LOG
#define LOG(args) MOZ_LOG(gRequestObserverProxyLog, LogLevel::Debug, args)
//-----------------------------------------------------------------------------
// nsARequestObserverEvent internal class...
//-----------------------------------------------------------------------------
nsARequestObserverEvent::nsARequestObserverEvent(nsIRequest *request)
: mRequest(request)
{
NS_PRECONDITION(mRequest, "null pointer");
}
//-----------------------------------------------------------------------------
// nsOnStartRequestEvent internal class...
//-----------------------------------------------------------------------------
class nsOnStartRequestEvent : public nsARequestObserverEvent
{
RefPtr<nsRequestObserverProxy> mProxy;
public:
nsOnStartRequestEvent(nsRequestObserverProxy *proxy,
nsIRequest *request)
: nsARequestObserverEvent(request)
, mProxy(proxy)
{
NS_PRECONDITION(mProxy, "null pointer");
}
virtual ~nsOnStartRequestEvent() {}
NS_IMETHOD Run() override
{
LOG(("nsOnStartRequestEvent::HandleEvent [req=%x]\n", mRequest.get()));
if (!mProxy->mObserver) {
NS_NOTREACHED("already handled onStopRequest event (observer is null)");
return NS_OK;
}
LOG(("handle startevent=%p\n", this));
nsresult rv = mProxy->mObserver->OnStartRequest(mRequest, mProxy->mContext);
if (NS_FAILED(rv)) {
LOG(("OnStartRequest failed [rv=%x] canceling request!\n", rv));
rv = mRequest->Cancel(rv);
NS_ASSERTION(NS_SUCCEEDED(rv), "Cancel failed for request!");
}
return NS_OK;
}
};
//-----------------------------------------------------------------------------
// nsOnStopRequestEvent internal class...
//-----------------------------------------------------------------------------
class nsOnStopRequestEvent : public nsARequestObserverEvent
{
RefPtr<nsRequestObserverProxy> mProxy;
public:
nsOnStopRequestEvent(nsRequestObserverProxy *proxy,
nsIRequest *request)
: nsARequestObserverEvent(request)
, mProxy(proxy)
{
NS_PRECONDITION(mProxy, "null pointer");
}
virtual ~nsOnStopRequestEvent() {}
NS_IMETHOD Run() override
{
LOG(("nsOnStopRequestEvent::HandleEvent [req=%x]\n", mRequest.get()));
nsMainThreadPtrHandle<nsIRequestObserver> observer = mProxy->mObserver;
if (!observer) {
NS_NOTREACHED("already handled onStopRequest event (observer is null)");
return NS_OK;
}
// Do not allow any more events to be handled after OnStopRequest
mProxy->mObserver = 0;
nsresult status = NS_OK;
DebugOnly<nsresult> rv = mRequest->GetStatus(&status);
NS_ASSERTION(NS_SUCCEEDED(rv), "GetStatus failed for request!");
LOG(("handle stopevent=%p\n", this));
(void) observer->OnStopRequest(mRequest, mProxy->mContext, status);
return NS_OK;
}
};
//-----------------------------------------------------------------------------
// nsRequestObserverProxy::nsISupports implementation...
//-----------------------------------------------------------------------------
NS_IMPL_ISUPPORTS(nsRequestObserverProxy,
nsIRequestObserver,
nsIRequestObserverProxy)
//-----------------------------------------------------------------------------
// nsRequestObserverProxy::nsIRequestObserver implementation...
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsRequestObserverProxy::OnStartRequest(nsIRequest *request,
nsISupports *context)
{
MOZ_ASSERT(!context || context == mContext);
LOG(("nsRequestObserverProxy::OnStartRequest [this=%p req=%x]\n", this, request));
nsOnStartRequestEvent *ev =
new nsOnStartRequestEvent(this, request);
if (!ev)
return NS_ERROR_OUT_OF_MEMORY;
LOG(("post startevent=%p\n", ev));
nsresult rv = FireEvent(ev);
if (NS_FAILED(rv))
delete ev;
return rv;
}
NS_IMETHODIMP
nsRequestObserverProxy::OnStopRequest(nsIRequest *request,
nsISupports *context,
nsresult status)
{
MOZ_ASSERT(!context || context == mContext);
LOG(("nsRequestObserverProxy: OnStopRequest [this=%p req=%x status=%x]\n",
this, request, status));
// The status argument is ignored because, by the time the OnStopRequestEvent
// is actually processed, the status of the request may have changed :-(
// To make sure that an accurate status code is always used, GetStatus() is
// called when the OnStopRequestEvent is actually processed (see above).
nsOnStopRequestEvent *ev =
new nsOnStopRequestEvent(this, request);
if (!ev)
return NS_ERROR_OUT_OF_MEMORY;
LOG(("post stopevent=%p\n", ev));
nsresult rv = FireEvent(ev);
if (NS_FAILED(rv))
delete ev;
return rv;
}
//-----------------------------------------------------------------------------
// nsRequestObserverProxy::nsIRequestObserverProxy implementation...
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsRequestObserverProxy::Init(nsIRequestObserver *observer, nsISupports *context)
{
NS_ENSURE_ARG_POINTER(observer);
mObserver = new nsMainThreadPtrHolder<nsIRequestObserver>(observer);
mContext = new nsMainThreadPtrHolder<nsISupports>(context);
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsRequestObserverProxy implementation...
//-----------------------------------------------------------------------------
nsresult
nsRequestObserverProxy::FireEvent(nsARequestObserverEvent *event)
{
nsCOMPtr<nsIEventTarget> mainThread(do_GetMainThread());
return mainThread->Dispatch(event, NS_DISPATCH_NORMAL);
}
} // namespace net
} // namespace mozilla
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