components/sessions/ios/ios_serialized_navigation_driver.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "components/sessions/ios/ios_serialized_navigation_driver.h"
   6
   7 #include "base/memory/singleton.h"
   8 #include "components/sessions/serialized_navigation_entry.h"
   9 #include "ios/web/public/referrer.h"
  10
  11 namespace sessions {
  12
  13 namespace {
  14 const int kObsoleteReferrerPolicyAlways = 0;
  15 const int kObsoleteReferrerPolicyDefault = 1;
  16 const int kObsoleteReferrerPolicyNever = 2;
  17 const int kObsoleteReferrerPolicyOrigin = 3;
  18 }  // namespace
  19
  20 // static
  21 SerializedNavigationDriver* SerializedNavigationDriver::Get() {
  22   return IOSSerializedNavigationDriver::GetInstance();
  23 }
  24
  25 // static
  26 IOSSerializedNavigationDriver*
  27 IOSSerializedNavigationDriver::GetInstance() {
  28   return base::Singleton<
  29       IOSSerializedNavigationDriver,
  30       base::LeakySingletonTraits<IOSSerializedNavigationDriver>>::get();
  31 }
  32
  33 IOSSerializedNavigationDriver::IOSSerializedNavigationDriver() {
  34 }
  35
  36 IOSSerializedNavigationDriver::~IOSSerializedNavigationDriver() {
  37 }
  38
  39 int IOSSerializedNavigationDriver::GetDefaultReferrerPolicy() const {
  40   return web::ReferrerPolicyDefault;
  41 }
  42
  43 bool IOSSerializedNavigationDriver::MapReferrerPolicyToOldValues(
  44     int referrer_policy,
  45     int* mapped_referrer_policy) const {
  46   switch (referrer_policy) {
  47     case web::ReferrerPolicyAlways:
  48     case web::ReferrerPolicyDefault:
  49       // "always" and "default" are the same value in all versions.
  50       *mapped_referrer_policy = referrer_policy;
  51       return true;
  52
  53     case web::ReferrerPolicyOrigin:
  54       // "origin" exists in the old encoding.
  55       *mapped_referrer_policy = kObsoleteReferrerPolicyOrigin;
  56       return true;
  57
  58     default:
  59       // Everything else is mapped to never.
  60       *mapped_referrer_policy = kObsoleteReferrerPolicyNever;
  61       return false;
  62   }
  63 }
  64
  65 bool IOSSerializedNavigationDriver::MapReferrerPolicyToNewValues(
  66     int referrer_policy,
  67     int* mapped_referrer_policy) const {
  68   switch (referrer_policy) {
  69     case kObsoleteReferrerPolicyAlways:
  70     case kObsoleteReferrerPolicyDefault:
  71       // "always" and "default" are the same value in all versions.
  72       *mapped_referrer_policy = referrer_policy;
  73       return true;
  74
  75     default:
  76       // Since we don't know what encoding was used, we map the rest to "never".
  77       *mapped_referrer_policy = web::ReferrerPolicyNever;
  78       return false;
  79   }
  80 }
  81
  82 std::string
  83 IOSSerializedNavigationDriver::GetSanitizedPageStateForPickle(
  84     const SerializedNavigationEntry* navigation) const {
  85   return std::string();
  86 }
  87
  88 void IOSSerializedNavigationDriver::Sanitize(
  89     SerializedNavigationEntry* navigation) const {
  90   web::Referrer referrer(
  91       navigation->referrer_url_,
  92       static_cast<web::ReferrerPolicy>(navigation->referrer_policy_));
  93
  94   if (!navigation->virtual_url_.SchemeIsHTTPOrHTTPS() ||
  95       !referrer.url.SchemeIsHTTPOrHTTPS()) {
  96     referrer.url = GURL();
  97   } else {
  98     if (referrer.policy < 0 || referrer.policy > web::ReferrerPolicyLast) {
  99       NOTREACHED();
 100       referrer.policy = web::ReferrerPolicyNever;
 101     }
 102     bool is_downgrade = referrer.url.SchemeIsCryptographic() &&
 103                         !navigation->virtual_url_.SchemeIsCryptographic();
 104     switch (referrer.policy) {
 105       case web::ReferrerPolicyDefault:
 106         if (is_downgrade)
 107           referrer.url = GURL();
 108         break;
 109       case web::ReferrerPolicyNoReferrerWhenDowngrade:
 110         if (is_downgrade)
 111           referrer.url = GURL();
 112       case web::ReferrerPolicyAlways:
 113         break;
 114       case web::ReferrerPolicyNever:
 115         referrer.url = GURL();
 116         break;
 117       case web::ReferrerPolicyOrigin:
 118         referrer.url = referrer.url.GetOrigin();
 119         break;
 120       case web::ReferrerPolicyOriginWhenCrossOrigin:
 121         if (navigation->virtual_url_.GetOrigin() != referrer.url.GetOrigin())
 122           referrer.url = referrer.url.GetOrigin();
 123         break;
 124     }
 125   }
 126
 127   // Reset the referrer if it has changed.
 128   if (navigation->referrer_url_ != referrer.url) {
 129     navigation->referrer_url_ = GURL();
 130     navigation->referrer_policy_ = GetDefaultReferrerPolicy();
 131   }
 132 }
 133
 134 std::string IOSSerializedNavigationDriver::StripReferrerFromPageState(
 135       const std::string& page_state) const {
 136   return std::string();
 137 }
 138
 139 }  // namespace sessions