variations_service.cc revision ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/metrics/variations/variations_service.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <set> 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/base64.h" 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/build_time.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/command_line.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/memory/scoped_ptr.h" 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/metrics/histogram.h" 14868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)#include "base/metrics/sparse_histogram.h" 152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "base/prefs/pref_registry_simple.h" 162a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "base/prefs/pref_service.h" 177dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch#include "base/sha1.h" 187dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch#include "base/strings/string_number_conversions.h" 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/version.h" 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/browser_process.h" 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/browser/metrics/proto/trials_seed.pb.h" 22558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch#include "chrome/browser/metrics/variations/variations_seed_processor.h" 23c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#include "chrome/browser/net/network_time_tracker.h" 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/common/chrome_switches.h" 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/common/metrics/variations/variations_util.h" 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/common/pref_names.h" 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "content/public/browser/browser_thread.h" 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "content/public/common/url_fetcher.h" 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "net/base/load_flags.h" 30868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)#include "net/base/net_errors.h" 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "net/base/network_change_notifier.h" 322a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "net/base/url_util.h" 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "net/http/http_response_headers.h" 342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "net/http/http_status_code.h" 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "net/http/http_util.h" 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "net/url_request/url_fetcher.h" 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "net/url_request/url_request_status.h" 38eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#include "url/gurl.h" 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 40c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#if defined(OS_CHROMEOS) 41c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#include "chrome/browser/chromeos/settings/cros_settings.h" 42c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#endif 43c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace chrome_variations { 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace { 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Default server of Variations seed info. 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const char kDefaultVariationsServerURL[] = 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) "https://clients4.google.com/chrome-variations/seed"; 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const int kMaxRetrySeedFetch = 5; 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 532a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// TODO(mad): To be removed when we stop updating the NetworkTimeTracker. 542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// For the HTTP date headers, the resolution of the server time is 1 second. 552a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)const int64 kServerTimeResolutionMs = 1000; 562a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 572a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// Wrapper around channel checking, used to enable channel mocking for 582a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// testing. If the current browser channel is not UNKNOWN, this will return 592a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// that channel value. Otherwise, if the fake channel flag is provided, this 602a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// will return the fake channel. Failing that, this will return the UNKNOWN 612a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// channel. 62ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben MurdochStudy_Channel GetChannelForVariations() { 63ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch switch (chrome::VersionInfo::GetChannel()) { 64ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch case chrome::VersionInfo::CHANNEL_CANARY: 65ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch return Study_Channel_CANARY; 66ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch case chrome::VersionInfo::CHANNEL_DEV: 67ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch return Study_Channel_DEV; 68ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch case chrome::VersionInfo::CHANNEL_BETA: 69ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch return Study_Channel_BETA; 70ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch case chrome::VersionInfo::CHANNEL_STABLE: 71ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch return Study_Channel_STABLE; 72ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch case chrome::VersionInfo::CHANNEL_UNKNOWN: 73ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch break; 74ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch } 75ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch const std::string forced_channel = 762a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) CommandLine::ForCurrentProcess()->GetSwitchValueASCII( 772a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) switches::kFakeVariationsChannel); 782a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (forced_channel == "stable") 79ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch return Study_Channel_STABLE; 80ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch if (forced_channel == "beta") 81ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch return Study_Channel_BETA; 82ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch if (forced_channel == "dev") 83ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch return Study_Channel_DEV; 84ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch if (forced_channel == "canary") 85ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch return Study_Channel_CANARY; 86ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch DVLOG(1) << "Invalid channel provided: " << forced_channel; 87ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch return Study_Channel_UNKNOWN; 882a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 892a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 90c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// Returns a string that will be used for the value of the 'osname' URL param 91c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// to the variations server. 92c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)std::string GetPlatformString() { 93c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#if defined(OS_WIN) 94c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) return "win"; 9590dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles)#elif defined(OS_IOS) 9690dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) return "ios"; 97c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#elif defined(OS_MACOSX) 98c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) return "mac"; 99c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#elif defined(OS_CHROMEOS) 100c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) return "chromeos"; 101c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#elif defined(OS_ANDROID) 102c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) return "android"; 103c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#elif defined(OS_LINUX) || defined(OS_BSD) || defined(OS_SOLARIS) 104c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) // Default BSD and SOLARIS to Linux to not break those builds, although these 105c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) // platforms are not officially supported by Chrome. 106c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) return "linux"; 107c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#else 108c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#error Unknown platform 109c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#endif 110c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)} 111c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Converts |date_time| in Study date format to base::Time. 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)base::Time ConvertStudyDateToBaseTime(int64 date_time) { 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::Time::UnixEpoch() + base::TimeDelta::FromSeconds(date_time); 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 117c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// Gets the restrict parameter from |local_state| or from Chrome OS settings in 118c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// the case of that platform. 119c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)std::string GetRestrictParameterPref(PrefService* local_state) { 120c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) std::string parameter; 121c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#if defined(OS_CHROMEOS) 122c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) chromeos::CrosSettings::Get()->GetString( 123c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) chromeos::kVariationsRestrictParameter, ¶meter); 124c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#else 125c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) if (local_state) 126c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) parameter = local_state->GetString(prefs::kVariationsRestrictParameter); 127c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#endif 128c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) return parameter; 129c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)} 130c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 1317dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch// Computes a hash of the serialized variations seed data. 1327dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdochstd::string HashSeed(const std::string& seed_data) { 1337dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch const std::string sha1 = base::SHA1HashString(seed_data); 1347dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch return base::HexEncode(sha1.data(), sha1.size()); 1357dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch} 1367dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 137868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)enum ResourceRequestsAllowedState { 138868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) RESOURCE_REQUESTS_ALLOWED, 139868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) RESOURCE_REQUESTS_NOT_ALLOWED, 140868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) RESOURCE_REQUESTS_ALLOWED_NOTIFIED, 141868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) RESOURCE_REQUESTS_ALLOWED_ENUM_SIZE, 142868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)}; 143868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) 144868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)// Records UMA histogram with the current resource requests allowed state. 145868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)void RecordRequestsAllowedHistogram(ResourceRequestsAllowedState state) { 146868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) UMA_HISTOGRAM_ENUMERATION("Variations.ResourceRequestsAllowed", state, 147868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) RESOURCE_REQUESTS_ALLOWED_ENUM_SIZE); 148868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)} 149868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) 1507dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdochenum VariationSeedEmptyState { 1517dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch VARIATIONS_SEED_NOT_EMPTY, 1527dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch VARIATIONS_SEED_EMPTY, 1537dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch VARIATIONS_SEED_CORRUPT, 1547dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch VARIATIONS_SEED_EMPTY_ENUM_SIZE, 1557dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch}; 1567dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 1577dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdochvoid RecordVariationSeedEmptyHistogram(VariationSeedEmptyState state) { 1587dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch UMA_HISTOGRAM_ENUMERATION("Variations.SeedEmpty", state, 1597dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch VARIATIONS_SEED_EMPTY_ENUM_SIZE); 1607dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch} 1617dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 1625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace 1635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1642a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)VariationsService::VariationsService(PrefService* local_state) 1652a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) : local_state_(local_state), 1662a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) variations_server_url_(GetVariationsServerURL(local_state)), 1675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) create_trials_from_seed_called_(false), 1687d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) initial_request_completed_(false), 1695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) resource_request_allowed_notifier_( 1705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) new ResourceRequestAllowedNotifier) { 1715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) resource_request_allowed_notifier_->Init(this); 1725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 174c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)VariationsService::VariationsService(ResourceRequestAllowedNotifier* notifier, 175c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) PrefService* local_state) 176c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) : local_state_(local_state), 1772a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) variations_server_url_(GetVariationsServerURL(NULL)), 1785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) create_trials_from_seed_called_(false), 1797d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) initial_request_completed_(false), 1805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) resource_request_allowed_notifier_(notifier) { 1815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) resource_request_allowed_notifier_->Init(this); 1825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)VariationsService::~VariationsService() { 1855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1872a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)bool VariationsService::CreateTrialsFromSeed() { 1885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) create_trials_from_seed_called_ = true; 1895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) TrialsSeed seed; 1917dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch if (!LoadTrialsSeedFromPref(&seed)) 1925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 1935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1942a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const int64 date_value = local_state_->GetInt64(prefs::kVariationsSeedDate); 1955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const base::Time seed_date = base::Time::FromInternalValue(date_value); 1965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const base::Time build_time = base::GetBuildTime(); 1975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Use the build time for date checks if either the seed date is invalid or 1985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the build time is newer than the seed date. 1995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::Time reference_date = seed_date; 2005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (seed_date.is_null() || seed_date < build_time) 2015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) reference_date = build_time; 2025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const chrome::VersionInfo current_version_info; 2045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!current_version_info.is_valid()) 2055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 2065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 207ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch const base::Version current_version(current_version_info.Version()); 208ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch if (!current_version.IsValid()) 209ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch return false; 210ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch 211558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch VariationsSeedProcessor().CreateTrialsFromSeed( 212558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch seed, g_browser_process->GetApplicationLocale(), reference_date, 213ba5b9a6411cb1792fd21f0a078d7a25cd1ceec16Ben Murdoch current_version, GetChannelForVariations()); 2142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Log the "freshness" of the seed that was just used. The freshness is the 2162a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // time between the last successful seed download and now. 2172a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const int64 last_fetch_time_internal = 2182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) local_state_->GetInt64(prefs::kVariationsLastFetchTime); 2192a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (last_fetch_time_internal) { 2202a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const base::Time now = base::Time::Now(); 2212a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const base::TimeDelta delta = 2222a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) now - base::Time::FromInternalValue(last_fetch_time_internal); 2232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Log the value in number of minutes. 2242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) UMA_HISTOGRAM_CUSTOM_COUNTS("Variations.SeedFreshness", delta.InMinutes(), 2252a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1, base::TimeDelta::FromDays(30).InMinutes(), 50); 2265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 2295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void VariationsService::StartRepeatedVariationsSeedFetch() { 2325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI)); 2335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Check that |CreateTrialsFromSeed| was called, which is necessary to 2355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // retrieve the serial number that will be sent to the server. 2365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(create_trials_from_seed_called_); 2375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 238c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) DCHECK(!request_scheduler_.get()); 239c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) // Note that the act of instantiating the scheduler will start the fetch, if 240c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) // the scheduler deems appropriate. Using Unretained is fine here since the 241c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) // lifespan of request_scheduler_ is guaranteed to be shorter than that of 242c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) // this service. 243c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) request_scheduler_.reset(VariationsRequestScheduler::Create( 244c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) base::Bind(&VariationsService::FetchVariationsSeed, 245c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) base::Unretained(this)), local_state_)); 246c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) request_scheduler_->Start(); 2472a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 2482a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 2502a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)GURL VariationsService::GetVariationsServerURL(PrefService* local_state) { 2512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) std::string server_url_string(CommandLine::ForCurrentProcess()-> 2522a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) GetSwitchValueASCII(switches::kVariationsServerURL)); 2532a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (server_url_string.empty()) 2542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) server_url_string = kDefaultVariationsServerURL; 2552a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) GURL server_url = GURL(server_url_string); 256c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 257c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) const std::string restrict_param = GetRestrictParameterPref(local_state); 258c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) if (!restrict_param.empty()) { 259c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) server_url = net::AppendOrReplaceQueryParameter(server_url, 260c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) "restrict", 261c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) restrict_param); 2622a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 263c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 264c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) server_url = net::AppendOrReplaceQueryParameter(server_url, "osname", 265c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) GetPlatformString()); 266c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 2672a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK(server_url.is_valid()); 2682a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return server_url; 2692a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 2702a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2712a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#if defined(OS_WIN) 2722a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void VariationsService::StartGoogleUpdateRegistrySync() { 2732a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) registry_syncer_.RequestRegistrySync(); 2745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2752a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#endif 2765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void VariationsService::SetCreateTrialsFromSeedCalledForTesting(bool called) { 2785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) create_trials_from_seed_called_ = called; 2795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2812a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// static 2822a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)std::string VariationsService::GetDefaultVariationsServerURLForTesting() { 2832a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return kDefaultVariationsServerURL; 2842a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 2852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2862a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// static 2872a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void VariationsService::RegisterPrefs(PrefRegistrySimple* registry) { 2882a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) registry->RegisterStringPref(prefs::kVariationsSeed, std::string()); 2897dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch registry->RegisterStringPref(prefs::kVariationsSeedHash, std::string()); 2902a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) registry->RegisterInt64Pref(prefs::kVariationsSeedDate, 2912a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) base::Time().ToInternalValue()); 2922a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) registry->RegisterInt64Pref(prefs::kVariationsLastFetchTime, 0); 2932a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) registry->RegisterStringPref(prefs::kVariationsRestrictParameter, 2942a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) std::string()); 2952a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 2962a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 2972a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// static 2982a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)VariationsService* VariationsService::Create(PrefService* local_state) { 299c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#if !defined(GOOGLE_CHROME_BUILD) 3002a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Unless the URL was provided, unsupported builds should return NULL to 3012a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // indicate that the service should not be used. 3022a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (!CommandLine::ForCurrentProcess()->HasSwitch( 303b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) switches::kVariationsServerURL)) { 304b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) DVLOG(1) << "Not creating VariationsService in unofficial build without --" 305b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) << switches::kVariationsServerURL << " specified."; 3062a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return NULL; 307b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) } 3082a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#endif 3092a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return new VariationsService(local_state); 3102a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 3112a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void VariationsService::DoActualFetch() { 3135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pending_seed_request_.reset(net::URLFetcher::Create( 3142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 0, variations_server_url_, net::URLFetcher::GET, this)); 3155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pending_seed_request_->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES | 3165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) net::LOAD_DO_NOT_SAVE_COOKIES); 3175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pending_seed_request_->SetRequestContext( 3185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) g_browser_process->system_request_context()); 3192a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) pending_seed_request_->SetMaxRetriesOn5xx(kMaxRetrySeedFetch); 3205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!variations_serial_number_.empty()) { 3215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pending_seed_request_->AddExtraRequestHeader("If-Match:" + 3225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) variations_serial_number_); 3235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pending_seed_request_->Start(); 3255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 326868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) const base::TimeTicks now = base::TimeTicks::Now(); 327868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) base::TimeDelta time_since_last_fetch; 328868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) // Record a time delta of 0 (default value) if there was no previous fetch. 329868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) if (!last_request_started_time_.is_null()) 330868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) time_since_last_fetch = now - last_request_started_time_; 331868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) UMA_HISTOGRAM_CUSTOM_COUNTS("Variations.TimeSinceLastFetchAttempt", 332868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) time_since_last_fetch.InMinutes(), 0, 333868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) base::TimeDelta::FromDays(7).InMinutes(), 50); 334868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) last_request_started_time_ = now; 3355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void VariationsService::FetchVariationsSeed() { 3385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI)); 3395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!resource_request_allowed_notifier_->ResourceRequestsAllowed()) { 341868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) RecordRequestsAllowedHistogram(RESOURCE_REQUESTS_NOT_ALLOWED); 3425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DVLOG(1) << "Resource requests were not allowed. Waiting for notification."; 3435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 3445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 346868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) RecordRequestsAllowedHistogram(RESOURCE_REQUESTS_ALLOWED); 3475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DoActualFetch(); 3485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void VariationsService::OnURLFetchComplete(const net::URLFetcher* source) { 3515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK_EQ(pending_seed_request_.get(), source); 3527d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) 3537d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) const bool is_first_request = !initial_request_completed_; 3547d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) initial_request_completed_ = true; 3557d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) 3565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The fetcher will be deleted when the request is handled. 3572a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) scoped_ptr<const net::URLFetcher> request(pending_seed_request_.release()); 358868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) const net::URLRequestStatus& request_status = request->GetStatus(); 359868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) if (request_status.status() != net::URLRequestStatus::SUCCESS) { 360868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) UMA_HISTOGRAM_SPARSE_SLOWLY("Variations.FailedRequestErrorCode", 361868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) -request_status.error()); 362868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) DVLOG(1) << "Variations server request failed with error: " 363868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) << request_status.error() << ": " 364868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) << net::ErrorToString(request_status.error()); 3657d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) // It's common for the very first fetch attempt to fail (e.g. the network 3667d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) // may not yet be available). In such a case, try again soon, rather than 3677d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) // waiting the full time interval. 3687d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) if (is_first_request) 3697d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) request_scheduler_->ScheduleFetchShortly(); 3705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 3715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Log the response code. 3742a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const int response_code = request->GetResponseCode(); 375868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) UMA_HISTOGRAM_SPARSE_SLOWLY("Variations.SeedFetchResponseCode", 376868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) response_code); 3775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const base::TimeDelta latency = 3795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::TimeTicks::Now() - last_request_started_time_; 3805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3812a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) base::Time response_date; 3822a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (response_code == net::HTTP_OK || 3832a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) response_code == net::HTTP_NOT_MODIFIED) { 3842a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) bool success = request->GetResponseHeaders()->GetDateValue(&response_date); 3852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK(success || response_date.is_null()); 3862a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3872a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (!response_date.is_null()) { 388c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) NetworkTimeTracker::BuildNotifierUpdateCallback().Run( 3892a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) response_date, 3902a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) base::TimeDelta::FromMilliseconds(kServerTimeResolutionMs), 3912a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) latency); 3922a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 3932a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 3942a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3952a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (response_code != net::HTTP_OK) { 3962a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DVLOG(1) << "Variations server request returned non-HTTP_OK response code: " 3972a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) << response_code; 3982a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (response_code == net::HTTP_NOT_MODIFIED) { 3995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) UMA_HISTOGRAM_MEDIUM_TIMES("Variations.FetchNotModifiedLatency", latency); 4002a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) RecordLastFetchTime(); 4012a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } else { 4025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) UMA_HISTOGRAM_MEDIUM_TIMES("Variations.FetchOtherLatency", latency); 4032a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 4045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 4055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) UMA_HISTOGRAM_MEDIUM_TIMES("Variations.FetchSuccessLatency", latency); 4075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string seed_data; 4095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool success = request->GetResponseAsString(&seed_data); 4105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(success); 4115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4127dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch StoreSeedData(seed_data, response_date); 4135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void VariationsService::OnResourceRequestsAllowed() { 4165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Note that this only attempts to fetch the seed at most once per period 4175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // (kSeedFetchPeriodHours). This works because 4185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // |resource_request_allowed_notifier_| only calls this method if an 4195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // attempt was made earlier that fails (which implies that the period had 4205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // elapsed). After a successful attempt is made, the notifier will know not 4215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // to call this method again until another failed attempt occurs. 422868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) RecordRequestsAllowedHistogram(RESOURCE_REQUESTS_ALLOWED_NOTIFIED); 4235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DVLOG(1) << "Retrying fetch."; 4245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DoActualFetch(); 425c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 426c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) // This service must have created a scheduler in order for this to be called. 427c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) DCHECK(request_scheduler_.get()); 428c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) request_scheduler_->Reset(); 4295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool VariationsService::StoreSeedData(const std::string& seed_data, 4327dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch const base::Time& seed_date) { 4332a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (seed_data.empty()) { 4342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) VLOG(1) << "Variations Seed data from server is empty, rejecting the seed."; 4352a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return false; 4362a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 4372a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 4385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Only store the seed data if it parses correctly. 4395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) TrialsSeed seed; 4405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!seed.ParseFromString(seed_data)) { 4415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) VLOG(1) << "Variations Seed data from server is not in valid proto format, " 4425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << "rejecting the seed."; 4435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 4445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string base64_seed_data; 4475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!base::Base64Encode(seed_data, &base64_seed_data)) { 4485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) VLOG(1) << "Variations Seed data from server fails Base64Encode, rejecting " 4495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << "the seed."; 4505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 4515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4537dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch local_state_->SetString(prefs::kVariationsSeed, base64_seed_data); 4547dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch local_state_->SetString(prefs::kVariationsSeedHash, HashSeed(seed_data)); 4557dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch local_state_->SetInt64(prefs::kVariationsSeedDate, 4567dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch seed_date.ToInternalValue()); 4575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) variations_serial_number_ = seed.serial_number(); 4582a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 4592a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) RecordLastFetchTime(); 4602a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 4615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 4625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4647dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdochbool VariationsService::LoadTrialsSeedFromPref(TrialsSeed* seed) { 4657dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch const std::string base64_seed_data = 4667dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch local_state_->GetString(prefs::kVariationsSeed); 4677dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch if (base64_seed_data.empty()) { 4687dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch RecordVariationSeedEmptyHistogram(VARIATIONS_SEED_EMPTY); 4692a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return false; 4707dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch } 4715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4727dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch const std::string hash_from_pref = 4737dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch local_state_->GetString(prefs::kVariationsSeedHash); 4742a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // If the decode process fails, assume the pref value is corrupt and clear it. 4752a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) std::string seed_data; 4765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!base::Base64Decode(base64_seed_data, &seed_data) || 4777dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch (!hash_from_pref.empty() && HashSeed(seed_data) != hash_from_pref) || 4785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) !seed->ParseFromString(seed_data)) { 4797dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch VLOG(1) << "Variations seed data in local pref is corrupt, clearing the " 4805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) << "pref."; 4817dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch local_state_->ClearPref(prefs::kVariationsSeed); 4827dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch local_state_->ClearPref(prefs::kVariationsSeedDate); 4837dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch local_state_->ClearPref(prefs::kVariationsSeedHash); 4847dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch RecordVariationSeedEmptyHistogram(VARIATIONS_SEED_CORRUPT); 4855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 4865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) variations_serial_number_ = seed->serial_number(); 4887dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch RecordVariationSeedEmptyHistogram(VARIATIONS_SEED_NOT_EMPTY); 4895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 4905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4922a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void VariationsService::RecordLastFetchTime() { 4932a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // local_state_ is NULL in tests, so check it first. 4942a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (local_state_) { 4952a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) local_state_->SetInt64(prefs::kVariationsLastFetchTime, 4962a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) base::Time::Now().ToInternalValue()); 4972a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 4982a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 4992a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 5005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace chrome_variations 501