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0d99d54c46
We currently do not handle responses for range requests at all in our HTTP caches. This means if we issue a request for a range of bytes=1-10, that response will be served to a subsequent request for a range of bytes=10-20. This is obviously invalid - so until we handle these requests, just don't cache them for now.
81 lines
3.1 KiB
C++
81 lines
3.1 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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#include <AK/Debug.h>
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#include <LibHTTP/Cache/MemoryCache.h>
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#include <LibHTTP/Cache/Utilities.h>
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namespace HTTP {
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NonnullRefPtr<MemoryCache> MemoryCache::create()
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{
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return adopt_ref(*new MemoryCache());
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}
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// https://httpwg.org/specs/rfc9111.html#constructing.responses.from.caches
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Optional<MemoryCache::Entry const&> MemoryCache::open_entry(URL::URL const& url, StringView method, HeaderList const& request_headers) const
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{
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// When presented with a request, a cache MUST NOT reuse a stored response unless:
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// - the presented target URI (Section 7.1 of [HTTP]) and that of the stored response match, and
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// - the request method associated with the stored response allows it to be used for the presented request, and
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auto serialized_url = serialize_url_for_cache_storage(url);
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auto cache_key = create_cache_key(serialized_url, method);
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auto cache_entry = m_complete_entries.get(cache_key);
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if (!cache_entry.has_value()) {
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dbgln_if(HTTP_MEMORY_CACHE_DEBUG, "\033[31;1mHTTP CACHE MISS!\033[0m {}", url);
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return {};
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}
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// FIXME: - request header fields nominated by the stored response (if any) match those presented (see Section 4.1), and
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(void)request_headers;
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// FIXME: - the stored response does not contain the no-cache directive (Section 5.2.2.4), unless it is successfully validated (Section 4.3), and
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// FIXME: - the stored response is one of the following:
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// + fresh (see Section 4.2), or
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// + allowed to be served stale (see Section 4.2.4), or
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// + successfully validated (see Section 4.3).
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dbgln_if(HTTP_MEMORY_CACHE_DEBUG, "\033[32;1mHTTP CACHE HIT!\033[0m {}", url);
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return cache_entry;
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}
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void MemoryCache::create_entry(URL::URL const& url, StringView method, HeaderList const& request_headers, u32 status_code, ByteString reason_phrase, HeaderList const& response_headers)
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{
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if (!is_cacheable(method, request_headers))
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return;
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if (!is_cacheable(status_code, response_headers))
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return;
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auto serialized_url = serialize_url_for_cache_storage(url);
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auto cache_key = create_cache_key(serialized_url, method);
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auto response_headers_copy = HeaderList::create();
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store_header_and_trailer_fields(response_headers_copy, response_headers);
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Entry cache_entry {
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.status_code = status_code,
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.reason_phrase = move(reason_phrase),
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.response_headers = move(response_headers_copy),
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.response_body = {},
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};
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m_pending_entries.set(cache_key, move(cache_entry));
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}
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void MemoryCache::finalize_entry(URL::URL const& url, StringView method, ByteBuffer response_body)
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{
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auto serialized_url = serialize_url_for_cache_storage(url);
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auto cache_key = create_cache_key(serialized_url, method);
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if (auto cache_entry = m_pending_entries.take(cache_key); cache_entry.has_value()) {
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cache_entry->response_body = move(response_body);
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m_complete_entries.set(cache_key, cache_entry.release_value());
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}
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}
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}
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