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// Copyright 2012 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.
#import "ios/web/history_state_util.h"
#include "base/logging.h"
#include "url/gurl.h"
namespace web {
namespace history_state_util {
bool IsHistoryStateChangeValid(const GURL& currentUrl,
const GURL& toUrl) {
// These two checks are very important to the security of the page. We cannot
// allow the page to change the state to an invalid URL.
CHECK(currentUrl.is_valid());
CHECK(toUrl.is_valid());
return toUrl.GetOrigin() == currentUrl.GetOrigin();
}
GURL GetHistoryStateChangeUrl(const GURL& currentUrl,
const GURL& baseUrl,
const std::string& destination) {
if (!baseUrl.is_valid())
return GURL();
GURL toUrl = baseUrl.Resolve(destination);
if (!toUrl.is_valid() || !IsHistoryStateChangeValid(currentUrl, toUrl))
return GURL();
return toUrl;
}
} // namespace history_state_util
} // namespace web
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