preflight_cache.cc | Explore in Territory

// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "services/network/cors/preflight_cache.h"

#include <iterator>
#include <string>

#include "base/metrics/histogram_macros.h"
#include "base/rand_util.h"
#include "base/time/time.h"
#include "base/values.h"
#include "net/base/registry_controlled_domains/registry_controlled_domain.h"
#include "net/log/net_log_event_type.h"
#include "net/log/net_log_with_source.h"
#include "services/network/data_remover_util.h"
#include "services/network/public/mojom/clear_data_filter.mojom.h"
#include "url/gurl.h"

namespace network::cors {

namespace {

constexpr size_t kMaxCacheEntries = …;
constexpr size_t kMaxKeyLength = …;
constexpr size_t kPurgeUnit = …;

// These values are persisted to logs. Entries should not be renumbered and
// numeric values should never be reused.
enum class CacheMetric { … };

base::Value::Dict NetLogCacheStatusParams(const CacheMetric metric) { … }

void RecordCacheMetricNetLog(CacheMetric metric,
                             const net::NetLogWithSource& net_log) { … }

}  // namespace

PreflightCache::PreflightCache() = default;
PreflightCache::~PreflightCache() = default;

void PreflightCache::AppendEntry(
    const url::Origin& origin,
    const GURL& url,
    const net::NetworkIsolationKey& network_isolation_key,
    mojom::IPAddressSpace target_ip_address_space,
    std::unique_ptr<PreflightResult> preflight_result) { … }

bool PreflightCache::CheckIfRequestCanSkipPreflight(
    const url::Origin& origin,
    const GURL& url,
    const net::NetworkIsolationKey& network_isolation_key,
    mojom::IPAddressSpace target_ip_address_space,
    mojom::CredentialsMode credentials_mode,
    const std::string& method,
    const net::HttpRequestHeaders& request_headers,
    bool is_revalidating,
    const net::NetLogWithSource& net_log,
    bool acam_preflight_spec_conformant) { … }

// Clear browsing history time ranges allow for last 1hr, 24hr, 7d, 4w,
// and all time.
// The PreflightCache does not contain a timestamp for when the entry was
// added to the cache, and since Chrome caps the Access-Control-Max-Age header
// value for CORS-preflight responses to 2hrs it doesn't make sense to add the
// granularity to remove only entries created in the last 1hr.
// Always clears the whole PreflightCache regardless the range selected for
// Clear Browsing history
void PreflightCache::ClearCache(mojom::ClearDataFilterPtr url_filter) { … }

size_t PreflightCache::CountEntriesForTesting() const { … }

bool PreflightCache::DoesEntryExistForTesting(
    const url::Origin& origin,
    const std::string& url,
    const net::NetworkIsolationKey& network_isolation_key,
    mojom::IPAddressSpace target_ip_address_space) { … }

void PreflightCache::MayPurgeForTesting(size_t max_entries, size_t purge_unit) { … }

void PreflightCache::MayPurge(size_t max_entries, size_t purge_unit) { … }

}  // namespace network::cors
chromium/services/network/cors/preflight_cache.cc
