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16fb2ea3b7
Let's not attempt to cache entries that are excessively large. We limit the cache data size to be 1/8 of the total disk cache limit, with a cap of 256 MiB.
82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
/*
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* Copyright (c) 2025-2026, Tim Flynn <trflynn89@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Error.h>
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#include <AK/HashMap.h>
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#include <AK/NonnullRawPtr.h>
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#include <AK/Time.h>
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#include <AK/Types.h>
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#include <LibDatabase/Database.h>
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#include <LibHTTP/HeaderList.h>
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#include <LibRequests/CacheSizes.h>
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namespace HTTP {
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// The cache index is a SQL database containing metadata about each cache entry. An entry in the index is created once
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// the entire cache entry has been successfully written to disk.
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class CacheIndex {
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struct Entry {
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u64 vary_key { 0 };
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String url;
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NonnullRefPtr<HeaderList> request_headers;
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NonnullRefPtr<HeaderList> response_headers;
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u64 data_size { 0 };
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UnixDateTime request_time;
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UnixDateTime response_time;
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UnixDateTime last_access_time;
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};
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public:
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static ErrorOr<CacheIndex> create(Database::Database&);
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ErrorOr<void> create_entry(u64 cache_key, u64 vary_key, String url, NonnullRefPtr<HeaderList> request_headers, NonnullRefPtr<HeaderList> response_headers, u64 data_size, UnixDateTime request_time, UnixDateTime response_time);
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void remove_entry(u64 cache_key, u64 vary_key);
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void remove_entries_exceeding_cache_limit(Function<void(u64 cache_key, u64 vary_key)> on_entry_removed);
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void remove_entries_accessed_since(UnixDateTime, Function<void(u64 cache_key, u64 vary_key)> on_entry_removed);
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Optional<Entry const&> find_entry(u64 cache_key, HeaderList const& request_headers);
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void update_response_headers(u64 cache_key, u64 vary_key, NonnullRefPtr<HeaderList>);
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void update_last_access_time(u64 cache_key, u64 vary_key);
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Requests::CacheSizes estimate_cache_size_accessed_since(UnixDateTime since);
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private:
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struct Statements {
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Database::StatementID insert_entry { 0 };
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Database::StatementID remove_entry { 0 };
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Database::StatementID remove_entries_exceeding_cache_limit { 0 };
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Database::StatementID remove_entries_accessed_since { 0 };
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Database::StatementID select_entries { 0 };
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Database::StatementID update_response_headers { 0 };
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Database::StatementID update_last_access_time { 0 };
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Database::StatementID estimate_cache_size_accessed_since { 0 };
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};
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struct Limits {
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u64 free_disk_space { 0 };
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u64 maximum_disk_cache_size { 0 };
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u64 maximum_disk_cache_entry_size { 0 };
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};
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CacheIndex(Database::Database&, Statements, Limits);
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Optional<Entry&> get_entry(u64 cache_key, u64 vary_key);
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void delete_entry(u64 cache_key, u64 vary_key);
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NonnullRawPtr<Database::Database> m_database;
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Statements m_statements;
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HashMap<u64, Vector<Entry>> m_entries;
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Limits m_limits;
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};
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}
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