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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 17:32:43 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 17:32:43 +0000
commit6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch)
treea68f146d7fa01f0134297619fbe7e33db084e0aa /netwerk/base/nsAsyncRedirectVerifyHelper.h
parentInitial commit. (diff)
downloadthunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz
thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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1 files changed, 121 insertions, 0 deletions
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+/* -*- Mode: C++; tab-width: 4; 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 nsAsyncRedirectVerifyHelper_h
+#define nsAsyncRedirectVerifyHelper_h
+
+#include "nsIRunnable.h"
+#include "nsIChannelEventSink.h"
+#include "nsIAsyncVerifyRedirectCallback.h"
+#include "nsINamed.h"
+#include "nsCOMPtr.h"
+#include "nsCycleCollectionParticipant.h"
+#include "mozilla/Attributes.h"
+
+class nsIChannel;
+
+namespace mozilla {
+namespace net {
+
+/**
+ * This class simplifies call of OnChannelRedirect of IOService and
+ * the sink bound with the channel being redirected while the result of
+ * redirect decision is returned through the callback.
+ */
+class nsAsyncRedirectVerifyHelper final
+ : public nsIRunnable,
+ public nsINamed,
+ public nsIAsyncVerifyRedirectCallback {
+ NS_DECL_THREADSAFE_ISUPPORTS
+ NS_DECL_NSIRUNNABLE
+ NS_DECL_NSINAMED
+ NS_DECL_NSIASYNCVERIFYREDIRECTCALLBACK
+
+ public:
+ nsAsyncRedirectVerifyHelper() = default;
+
+ /*
+ * Calls AsyncOnChannelRedirect() on the given sink with the given
+ * channels and flags. Keeps track of number of async callbacks to expect.
+ */
+ nsresult DelegateOnChannelRedirect(nsIChannelEventSink* sink,
+ nsIChannel* oldChannel,
+ nsIChannel* newChannel, uint32_t flags);
+
+ /**
+ * Initialize and run the chain of AsyncOnChannelRedirect calls. OldChannel
+ * is QI'ed for nsIAsyncVerifyRedirectCallback. The result of the redirect
+ * decision is passed through this interface back to the oldChannel.
+ *
+ * @param oldChan
+ * channel being redirected, MUST implement
+ * nsIAsyncVerifyRedirectCallback
+ * @param newChan
+ * target of the redirect channel
+ * @param flags
+ * redirect flags
+ * @param mainThreadEventTarget
+ * a labeled event target for dispatching runnables
+ * @param synchronize
+ * set to TRUE if you want the Init method wait synchronously for
+ * all redirect callbacks
+ */
+ nsresult Init(nsIChannel* oldChan, nsIChannel* newChan, uint32_t flags,
+ nsIEventTarget* mainThreadEventTarget,
+ bool synchronize = false);
+
+ protected:
+ nsCOMPtr<nsIChannel> mOldChan;
+ nsCOMPtr<nsIChannel> mNewChan;
+ uint32_t mFlags{0};
+ bool mWaitingForRedirectCallback{false};
+ nsCOMPtr<nsIEventTarget> mCallbackEventTarget;
+ bool mCallbackInitiated{false};
+ int32_t mExpectedCallbacks{0};
+ nsresult mResult{NS_OK}; // value passed to callback
+
+ void InitCallback();
+
+ /**
+ * Calls back to |oldChan| as described in Init()
+ */
+ void ExplicitCallback(nsresult result);
+
+ private:
+ ~nsAsyncRedirectVerifyHelper();
+
+ bool IsOldChannelCanceled();
+};
+
+/*
+ * Helper to make the call-stack handle some control-flow for us
+ */
+class nsAsyncRedirectAutoCallback {
+ public:
+ explicit nsAsyncRedirectAutoCallback(
+ nsIAsyncVerifyRedirectCallback* aCallback)
+ : mCallback(aCallback) {
+ mResult = NS_OK;
+ }
+ ~nsAsyncRedirectAutoCallback() {
+ if (mCallback) mCallback->OnRedirectVerifyCallback(mResult);
+ }
+ /*
+ * Call this is you want it to call back with a different result-code
+ */
+ void SetResult(nsresult aRes) { mResult = aRes; }
+ /*
+ * Call this is you want to avoid the callback
+ */
+ void DontCallback() { mCallback = nullptr; }
+
+ private:
+ nsIAsyncVerifyRedirectCallback* mCallback;
+ nsresult mResult;
+};
+
+} // namespace net
+} // namespace mozilla
+#endif