chromium/chrome/browser/dips/cookie_access_filter.cc

// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "chrome/browser/dips/cookie_access_filter.h"

#include "chrome/browser/dips/dips_utils.h"

CookieAccessFilter::CookieAccessFilter() = default;
CookieAccessFilter::~CookieAccessFilter() = default;

void CookieAccessFilter::AddAccess(const GURL& url, CookieOperation op) { … }

// This method attempts to match every entry of this->accesses_ with a member of
// `urls`, in order. Other URLs will be treated as kNone.
//
// Imagine `urls` contains 5 unique URLs [A, B, C, D, E] and this->accesses_
// contains [(B, kRead), (D, kWrite)]; then this will store in `result`: [kNone,
// kRead, kNone, kWrite, kNone].
//
// It's complicated by the fact that AddAccess() can be called multiple times
// redundantly for a single URL visit, so it must coalesce them (see
// crbug.com/1335510); yet it's theoretically possible for one URL to be visited
// multiple times, even consecutively, in a single redirect chain.
//
// To handle that corner case (imperfectly), if the same URL appears multiple
// times in a row, it will get the same SiteDataAccessType for all of them.
bool CookieAccessFilter::Filter(const std::vector<GURL>& urls,
                                std::vector<SiteDataAccessType>* result) const { … }