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/*
* Copyright (C) 2014-2015 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "NetworkCacheData.h"
#include <wtf/CrossThreadCopier.h>
#include <wtf/SHA1.h>
#include <wtf/StdLibExtras.h>
#include <wtf/text/WTFString.h>
namespace WTF::Persistence {
template<typename> struct Coder;
}
namespace WebKit::NetworkCache {
struct DataKey {
String partition;
String type;
SHA1::Digest identifier;
template <class Encoder> void encodeForPersistence(Encoder& encoder) const
{
encoder << partition << type << identifier;
}
template <class Decoder> static WARN_UNUSED_RETURN bool decodeForPersistence(Decoder& decoder, DataKey& dataKey)
{
return decoder.decode(dataKey.partition) && decoder.decode(dataKey.type) && decoder.decode(dataKey.identifier);
}
};
class Key {
public:
typedef SHA1::Digest HashType;
Key() { }
Key(const Key&);
Key(Key&&) = default;
Key(const String& partition, const String& type, const String& range, const String& identifier, const Salt&);
Key(const DataKey&, const Salt&);
Key& operator=(const Key&);
Key& operator=(Key&&) = default;
Key(WTF::HashTableDeletedValueType);
bool isHashTableDeletedValue() const { return m_identifier.isHashTableDeletedValue(); }
bool isNull() const { return m_identifier.isNull(); }
const String& partition() const { return m_partition; }
const String& identifier() const { return m_identifier; }
const String& type() const { return m_type; }
const String& range() const { return m_range; }
const HashType& hash() const { return m_hash; }
const HashType& partitionHash() const { return m_partitionHash; }
static bool stringToHash(const String&, HashType&);
static size_t hashStringLength() { return 2 * sizeof(m_hash); }
String hashAsString() const { return hashAsString(m_hash); }
String partitionHashAsString() const { return hashAsString(m_partitionHash); }
bool operator==(const Key&) const;
static String partitionToPartitionHashAsString(const String& partition, const Salt&);
Key isolatedCopy() && { return {
crossThreadCopy(WTFMove(m_partition)),
crossThreadCopy(WTFMove(m_type)),
crossThreadCopy(WTFMove(m_identifier)),
crossThreadCopy(WTFMove(m_range)),
m_hash,
m_partitionHash
}; }
Key isolatedCopy() const & { return {
crossThreadCopy(m_partition),
crossThreadCopy(m_type),
crossThreadCopy(m_identifier),
crossThreadCopy(m_range),
m_hash,
m_partitionHash
}; }
private:
friend struct WTF::Persistence::Coder<Key>;
static String hashAsString(const HashType&);
HashType computeHash(const Salt&) const;
HashType computePartitionHash(const Salt&) const;
static HashType partitionToPartitionHash(const String& partition, const Salt&);
Key(String&& partition, String&& type, String&& identifier, String&& range, HashType hash, HashType partitionHash)
: m_partition(WTFMove(partition))
, m_type(WTFMove(type))
, m_identifier(WTFMove(identifier))
, m_range(WTFMove(range))
, m_hash(hash)
, m_partitionHash(partitionHash) { }
String m_partition;
String m_type;
String m_identifier;
String m_range;
HashType m_hash;
HashType m_partitionHash;
};
}
namespace WTF {
struct NetworkCacheKeyHash {
static unsigned hash(const WebKit::NetworkCache::Key& key)
{
static_assert(SHA1::hashSize >= sizeof(unsigned), "Hash size must be greater than sizeof(unsigned)");
return reinterpretCastSpanStartTo<const unsigned>(std::span { key.hash() });
}
static bool equal(const WebKit::NetworkCache::Key& a, const WebKit::NetworkCache::Key& b)
{
return a == b;
}
static const bool safeToCompareToEmptyOrDeleted = false;
};
template<typename T> struct DefaultHash;
template<> struct DefaultHash<WebKit::NetworkCache::Key> : NetworkCacheKeyHash { };
template<> struct HashTraits<WebKit::NetworkCache::Key> : SimpleClassHashTraits<WebKit::NetworkCache::Key> {
static const bool emptyValueIsZero = false;
static const bool hasIsEmptyValueFunction = true;
static bool isEmptyValue(const WebKit::NetworkCache::Key& key) { return key.isNull(); }
};
} // namespace WTF
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