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58 lines
2.1 KiB
C
58 lines
2.1 KiB
C
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// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef NET_BASE_BACKOFF_ENTRY_SERIALIZER_H_
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#define NET_BASE_BACKOFF_ENTRY_SERIALIZER_H_
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#include <memory>
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#include "base/macros.h"
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#include "base/time/time.h"
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#include "net/base/backoff_entry.h"
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#include "net/base/net_export.h"
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namespace base {
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class Value;
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class TickClock;
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}
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namespace net {
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// Serialize or deserialize a BackoffEntry, so it can persist beyond the
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// lifetime of the browser.
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class NET_EXPORT BackoffEntrySerializer {
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public:
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// Serializes the release time and failure count into a ListValue that can
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// later be passed to Deserialize to re-create the given BackoffEntry. The
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// Policy is not serialized, instead callers must pass an identical Policy*
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// when deserializing. |time_now| should be base::Time::Now(), except for
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// tests that want to simulate time changes. The release time TimeTicks will
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// be converted to an absolute timestamp, thus the time will continue counting
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// down even whilst the device is powered off, and will be partially
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// vulnerable to changes in the system clock time.
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static std::unique_ptr<base::Value> SerializeToValue(
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const BackoffEntry& entry,
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base::Time time_now);
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// Deserializes a ListValue back to a BackoffEntry. |policy| MUST be the same
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// Policy as the serialized entry had. |clock| may be NULL. Both |policy| and
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// |clock| (if not NULL) must enclose lifetime of the returned BackoffEntry.
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// |time_now| should be base::Time::Now(), except for tests that want to
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// simulate time changes. The absolute timestamp that was serialized will be
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// converted back to TimeTicks as best as possible. Returns NULL if
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// deserialization was unsuccessful.
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static std::unique_ptr<BackoffEntry> DeserializeFromValue(
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const base::Value& serialized,
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const BackoffEntry::Policy* policy,
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const base::TickClock* clock,
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base::Time time_now);
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private:
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DISALLOW_IMPLICIT_CONSTRUCTORS(BackoffEntrySerializer);
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};
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} // namespace net
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#endif // NET_BASE_BACKOFF_ENTRY_SERIALIZER_H_
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