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b2c112c41a
This mode allows us to test the HTTP disk cache with two mechanisms: 1. If RequestServer is launched with --http-disk-cache-mode=testing, it will cache requests with a X-Ladybird-Enable-Disk-Cache header. 2. In test mode, RS will include a X-Ladybird-Disk-Cache-Status response header indicating how the response was handled by the cache. There is no standard way for a web request to know what happened with respect to the disk cache, so this fills that hole for testing. This mode is not exposed to users.
66 lines
1.8 KiB
C++
66 lines
1.8 KiB
C++
/*
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* Copyright (c) 2025, 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/LexicalPath.h>
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#include <AK/Optional.h>
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#include <AK/StringView.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 <LibURL/Forward.h>
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#include <RequestServer/Cache/CacheEntry.h>
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#include <RequestServer/Cache/CacheIndex.h>
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namespace RequestServer {
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class DiskCache {
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public:
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enum class Mode {
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Normal,
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// In test mode, we only enable caching of responses on a per-request basis, signified by a request header. The
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// response headers will include some status on how the request was handled.
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Testing,
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};
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static ErrorOr<DiskCache> create(Mode);
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Mode mode() const { return m_mode; }
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struct CacheHasOpenEntry { };
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Variant<Optional<CacheEntryWriter&>, CacheHasOpenEntry> create_entry(Request&);
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Variant<Optional<CacheEntryReader&>, CacheHasOpenEntry> open_entry(Request&);
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Requests::CacheSizes estimate_cache_size_accessed_since(UnixDateTime since) const;
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void remove_entries_accessed_since(UnixDateTime since);
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LexicalPath const& cache_directory() { return m_cache_directory; }
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void cache_entry_closed(Badge<CacheEntry>, CacheEntry const&);
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private:
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DiskCache(Mode, NonnullRefPtr<Database::Database>, LexicalPath cache_directory, CacheIndex);
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enum class CheckReaderEntries {
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No,
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Yes,
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};
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bool check_if_cache_has_open_entry(Request&, u64 cache_key, CheckReaderEntries);
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Mode m_mode;
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NonnullRefPtr<Database::Database> m_database;
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HashMap<u64, Vector<NonnullOwnPtr<CacheEntry>, 1>> m_open_cache_entries;
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HashMap<u64, Vector<WeakPtr<Request>, 1>> m_requests_waiting_completion;
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LexicalPath m_cache_directory;
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CacheIndex m_index;
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};
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}
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