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// Copyright 2021 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "services/network/cors/cors_util.h"
#include "net/http/http_util.h"
#include "services/network/public/cpp/cors/cors.h"
namespace network {
namespace cors {
std::vector<std::string> CorsUnsafeNotForbiddenRequestHeaderNames(
const net::HttpRequestHeaders::HeaderVector& headers,
bool is_revalidating) {
std::vector<std::string> header_names;
std::vector<std::string> potentially_unsafe_names;
constexpr size_t kSafeListValueSizeMax = 1024;
size_t safe_list_value_size = 0;
for (const auto& header : headers) {
if (!net::HttpUtil::IsSafeHeader(header.key, header.value))
continue;
const std::string name = base::ToLowerASCII(header.key);
if (is_revalidating) {
if (name == "if-modified-since" || name == "if-none-match" ||
name == "cache-control") {
continue;
}
}
if (!IsCorsSafelistedHeader(name, header.value)) {
header_names.push_back(name);
} else {
potentially_unsafe_names.push_back(name);
safe_list_value_size += header.value.size();
}
}
if (safe_list_value_size > kSafeListValueSizeMax) {
header_names.insert(header_names.end(), potentially_unsafe_names.begin(),
potentially_unsafe_names.end());
}
return header_names;
}
} // namespace cors
} // namespace network
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