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// Copyright 2014 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 "components/sessions/ios/ios_serialized_navigation_driver.h"
#include "base/memory/singleton.h"
#include "components/sessions/serialized_navigation_entry.h"
#include "ios/web/public/referrer.h"
namespace sessions {
namespace {
const int kObsoleteReferrerPolicyAlways = 0;
const int kObsoleteReferrerPolicyDefault = 1;
const int kObsoleteReferrerPolicyNever = 2;
const int kObsoleteReferrerPolicyOrigin = 3;
} // namespace
// static
SerializedNavigationDriver* SerializedNavigationDriver::Get() {
return IOSSerializedNavigationDriver::GetInstance();
}
// static
IOSSerializedNavigationDriver*
IOSSerializedNavigationDriver::GetInstance() {
return Singleton<IOSSerializedNavigationDriver,
LeakySingletonTraits<IOSSerializedNavigationDriver>>::get();
}
IOSSerializedNavigationDriver::IOSSerializedNavigationDriver() {
}
IOSSerializedNavigationDriver::~IOSSerializedNavigationDriver() {
}
int IOSSerializedNavigationDriver::GetDefaultReferrerPolicy() const {
return web::ReferrerPolicyDefault;
}
bool IOSSerializedNavigationDriver::MapReferrerPolicyToOldValues(
int referrer_policy,
int* mapped_referrer_policy) const {
switch (referrer_policy) {
case web::ReferrerPolicyAlways:
case web::ReferrerPolicyDefault:
// "always" and "default" are the same value in all versions.
*mapped_referrer_policy = referrer_policy;
return true;
case web::ReferrerPolicyOrigin:
// "origin" exists in the old encoding.
*mapped_referrer_policy = kObsoleteReferrerPolicyOrigin;
return true;
default:
// Everything else is mapped to never.
*mapped_referrer_policy = kObsoleteReferrerPolicyNever;
return false;
}
}
bool IOSSerializedNavigationDriver::MapReferrerPolicyToNewValues(
int referrer_policy,
int* mapped_referrer_policy) const {
switch (referrer_policy) {
case kObsoleteReferrerPolicyAlways:
case kObsoleteReferrerPolicyDefault:
// "always" and "default" are the same value in all versions.
*mapped_referrer_policy = referrer_policy;
return true;
default:
// Since we don't know what encoding was used, we map the rest to "never".
*mapped_referrer_policy = web::ReferrerPolicyNever;
return false;
}
}
std::string
IOSSerializedNavigationDriver::GetSanitizedPageStateForPickle(
const SerializedNavigationEntry* navigation) const {
return std::string();
}
void IOSSerializedNavigationDriver::Sanitize(
SerializedNavigationEntry* navigation) const {
web::Referrer referrer(
navigation->referrer_url_,
static_cast<web::ReferrerPolicy>(navigation->referrer_policy_));
if (!navigation->virtual_url_.SchemeIsHTTPOrHTTPS() ||
!referrer.url.SchemeIsHTTPOrHTTPS()) {
referrer.url = GURL();
} else {
if (referrer.policy < 0 || referrer.policy > web::ReferrerPolicyLast) {
NOTREACHED();
referrer.policy = web::ReferrerPolicyNever;
}
bool is_downgrade = referrer.url.SchemeIsSecure() &&
!navigation->virtual_url_.SchemeIsSecure();
switch (referrer.policy) {
case web::ReferrerPolicyDefault:
if (is_downgrade)
referrer.url = GURL();
break;
case web::ReferrerPolicyNoReferrerWhenDowngrade:
if (is_downgrade)
referrer.url = GURL();
case web::ReferrerPolicyAlways:
break;
case web::ReferrerPolicyNever:
referrer.url = GURL();
break;
case web::ReferrerPolicyOrigin:
referrer.url = referrer.url.GetOrigin();
break;
case web::ReferrerPolicyOriginWhenCrossOrigin:
if (navigation->virtual_url_.GetOrigin() != referrer.url.GetOrigin())
referrer.url = referrer.url.GetOrigin();
break;
}
}
// Reset the referrer if it has changed.
if (navigation->referrer_url_ != referrer.url) {
navigation->referrer_url_ = GURL();
navigation->referrer_policy_ = GetDefaultReferrerPolicy();
}
}
std::string IOSSerializedNavigationDriver::StripReferrerFromPageState(
const std::string& page_state) const {
return std::string();
}
} // namespace sessions
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