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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 "chrome/browser/push_messaging/push_messaging_app_identifier.h"
#include <string.h>
#include "base/guid.h"
#include "base/logging.h"
#include "base/prefs/pref_service.h"
#include "base/prefs/scoped_user_pref_update.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/values.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/pref_names.h"
#include "components/pref_registry/pref_registry_syncable.h"
const char kPushMessagingAppIdentifierPrefix[] = "wp:";
namespace {
// sizeof is strlen + 1 since it's null-terminated.
const size_t kPrefixLength = sizeof(kPushMessagingAppIdentifierPrefix) - 1;
const char kSeparator = '#'; // Ok as only the origin of the url is used.
const size_t kGuidLength = 36; // "%08X-%04X-%04X-%04X-%012llX"
std::string MakePrefValue(const GURL& origin,
int64_t service_worker_registration_id) {
return origin.spec() + kSeparator
+ base::Int64ToString(service_worker_registration_id);
}
bool GetOriginAndSWRFromPrefValue(
const std::string& pref_value, GURL* origin,
int64_t* service_worker_registration_id) {
std::vector<std::string> parts;
base::SplitString(pref_value, kSeparator, &parts);
if (parts.size() != 2)
return false;
if (!base::StringToInt64(parts[1], service_worker_registration_id))
return false;
*origin = GURL(parts[0]);
return origin->is_valid();
}
} // namespace
// static
void PushMessagingAppIdentifier::RegisterProfilePrefs(
user_prefs::PrefRegistrySyncable* registry) {
registry->RegisterDictionaryPref(prefs::kPushMessagingAppIdentifierMap);
}
// static
PushMessagingAppIdentifier PushMessagingAppIdentifier::Generate(
const GURL& origin, int64_t service_worker_registration_id)
{
std::string guid = base::GenerateGUID();
CHECK(!guid.empty());
std::string app_id = kPushMessagingAppIdentifierPrefix + origin.spec()
+ kSeparator + guid;
PushMessagingAppIdentifier app_identifier(app_id, origin,
service_worker_registration_id);
app_identifier.DCheckValid();
return app_identifier;
}
// static
PushMessagingAppIdentifier PushMessagingAppIdentifier::FindByAppId(
Profile* profile, const std::string& app_id) {
if (!base::StartsWith(app_id, kPushMessagingAppIdentifierPrefix,
base::CompareCase::INSENSITIVE_ASCII)) {
return PushMessagingAppIdentifier();
}
// Since we now know this is a Push Messaging app_id, check the case hasn't
// been mangled (crbug.com/461867).
DCHECK_EQ(kPushMessagingAppIdentifierPrefix, app_id.substr(0, kPrefixLength));
DCHECK_GE(app_id.size(), kPrefixLength + kGuidLength);
DCHECK_EQ(app_id.substr(app_id.size() - kGuidLength),
base::StringToUpperASCII(
app_id.substr(app_id.size() - kGuidLength)));
const base::DictionaryValue* map =
profile->GetPrefs()->GetDictionary(prefs::kPushMessagingAppIdentifierMap);
std::string map_value;
if (!map->GetStringWithoutPathExpansion(app_id, &map_value))
return PushMessagingAppIdentifier();
GURL origin;
int64_t service_worker_registration_id;
if (!GetOriginAndSWRFromPrefValue(map_value, &origin,
&service_worker_registration_id)) {
NOTREACHED();
return PushMessagingAppIdentifier();
}
PushMessagingAppIdentifier app_identifier(app_id, origin,
service_worker_registration_id);
app_identifier.DCheckValid();
return app_identifier;
}
// static
PushMessagingAppIdentifier PushMessagingAppIdentifier::FindByServiceWorker(
Profile* profile, const GURL& origin,
int64_t service_worker_registration_id)
{
const base::StringValue pref_value =
base::StringValue(MakePrefValue(origin, service_worker_registration_id));
const base::DictionaryValue* map =
profile->GetPrefs()->GetDictionary(prefs::kPushMessagingAppIdentifierMap);
for (auto it = base::DictionaryValue::Iterator(*map); !it.IsAtEnd();
it.Advance()) {
if (it.value().Equals(&pref_value))
return FindByAppId(profile, it.key());
}
return PushMessagingAppIdentifier();
}
// static
std::vector<PushMessagingAppIdentifier> PushMessagingAppIdentifier::GetAll(
Profile* profile) {
std::vector<PushMessagingAppIdentifier> result;
const base::DictionaryValue* map =
profile->GetPrefs()->GetDictionary(prefs::kPushMessagingAppIdentifierMap);
for (auto it = base::DictionaryValue::Iterator(*map); !it.IsAtEnd();
it.Advance()) {
result.push_back(FindByAppId(profile, it.key()));
}
return result;
}
PushMessagingAppIdentifier::PushMessagingAppIdentifier()
: origin_(GURL::EmptyGURL()),
service_worker_registration_id_(-1) {
}
PushMessagingAppIdentifier::PushMessagingAppIdentifier(
const std::string& app_id,
const GURL& origin,
int64_t service_worker_registration_id)
: app_id_(app_id),
origin_(origin),
service_worker_registration_id_(service_worker_registration_id) {
}
PushMessagingAppIdentifier::~PushMessagingAppIdentifier() {
}
void PushMessagingAppIdentifier::PersistToPrefs(Profile* profile) const {
DCheckValid();
DictionaryPrefUpdate update(profile->GetPrefs(),
prefs::kPushMessagingAppIdentifierMap);
base::DictionaryValue* map = update.Get();
// Delete any stale entry with the same origin and Service Worker
// registration id (hence we ensure there is a 1:1 not 1:many mapping).
PushMessagingAppIdentifier old = FindByServiceWorker(
profile, origin_, service_worker_registration_id_);
if (!old.is_null())
map->RemoveWithoutPathExpansion(old.app_id_, nullptr /* out_value */);
map->SetStringWithoutPathExpansion(
app_id_, MakePrefValue(origin_, service_worker_registration_id_));
}
void PushMessagingAppIdentifier::DeleteFromPrefs(Profile* profile) const {
DCheckValid();
DictionaryPrefUpdate update(profile->GetPrefs(),
prefs::kPushMessagingAppIdentifierMap);
base::DictionaryValue* map = update.Get();
map->RemoveWithoutPathExpansion(app_id_, nullptr /* out_value */);
}
void PushMessagingAppIdentifier::DCheckValid() const {
DCHECK_GE(service_worker_registration_id_, 0);
DCHECK(origin_.is_valid());
DCHECK_EQ(origin_.GetOrigin(), origin_);
// "wp:"
DCHECK_EQ(kPushMessagingAppIdentifierPrefix,
app_id_.substr(0, kPrefixLength));
// Optional (origin.spec() + '#')
if (app_id_.size() != kPrefixLength + kGuidLength) {
const size_t suffix_length = 1 /* kSeparator */ + kGuidLength;
DCHECK(app_id_.size() > kPrefixLength + suffix_length);
DCHECK_EQ(origin_, GURL(app_id_.substr(
kPrefixLength, app_id_.size() - kPrefixLength - suffix_length)));
DCHECK_EQ(std::string(1, kSeparator),
app_id_.substr(app_id_.size() - suffix_length, 1));
}
// GUID
DCHECK(base::IsValidGUID(app_id_.substr(app_id_.size() - kGuidLength)));
}
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