| // Copyright 2016 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/network_session_configurator/browser/network_session_configurator.h" |
| |
| #include <map> |
| #include <unordered_set> |
| |
| #include "base/command_line.h" |
| #include "base/feature_list.h" |
| #include "base/metrics/field_trial.h" |
| #include "base/metrics/histogram_macros.h" |
| #include "base/strings/string_number_conversions.h" |
| #include "base/strings/string_piece.h" |
| #include "base/strings/string_split.h" |
| #include "base/strings/string_util.h" |
| #include "build/build_config.h" |
| #include "components/network_session_configurator/common/network_features.h" |
| #include "components/network_session_configurator/common/network_switches.h" |
| #include "components/variations/variations_associated_data.h" |
| #include "net/base/host_mapping_rules.h" |
| #include "net/http/http_stream_factory.h" |
| #include "net/quic/chromium/quic_utils_chromium.h" |
| #include "net/quic/core/quic_packets.h" |
| #include "net/spdy/core/spdy_protocol.h" |
| |
| namespace { |
| |
| // Map from name to value for all parameters associate with a field trial. |
| using VariationParameters = std::map<std::string, std::string>; |
| |
| const char kTCPFastOpenFieldTrialName[] = "TCPFastOpen"; |
| const char kTCPFastOpenHttpsEnabledGroupName[] = "HttpsEnabled"; |
| |
| const char kQuicFieldTrialName[] = "QUIC"; |
| const char kQuicFieldTrialEnabledGroupName[] = "Enabled"; |
| const char kQuicFieldTrialHttpsEnabledGroupName[] = "HttpsEnabled"; |
| |
| // Field trial for HTTP/2. |
| const char kHttp2FieldTrialName[] = "HTTP2"; |
| const char kHttp2FieldTrialDisablePrefix[] = "Disable"; |
| |
| // Gets the value of the specified command line switch, as an integer. If unable |
| // to convert it to an int (It's not an int, or the switch is not present) |
| // returns 0. |
| int GetSwitchValueAsInt(const base::CommandLine& command_line, |
| const std::string& switch_name) { |
| int value; |
| if (!base::StringToInt(command_line.GetSwitchValueASCII(switch_name), |
| &value)) { |
| return 0; |
| } |
| return value; |
| } |
| |
| // Returns the value associated with |key| in |params| or "" if the |
| // key is not present in the map. |
| const std::string& GetVariationParam( |
| const std::map<std::string, std::string>& params, |
| const std::string& key) { |
| std::map<std::string, std::string>::const_iterator it = params.find(key); |
| if (it == params.end()) |
| return base::EmptyString(); |
| |
| return it->second; |
| } |
| |
| void ConfigureTCPFastOpenParams(const base::CommandLine& command_line, |
| base::StringPiece tfo_trial_group, |
| net::HttpNetworkSession::Params* params) { |
| if (command_line.HasSwitch(switches::kEnableTcpFastOpen)) { |
| params->tcp_fast_open_mode = |
| net::HttpNetworkSession::Params::TcpFastOpenMode::ENABLED_FOR_ALL; |
| } else if (tfo_trial_group == kTCPFastOpenHttpsEnabledGroupName) { |
| params->tcp_fast_open_mode = |
| net::HttpNetworkSession::Params::TcpFastOpenMode::ENABLED_FOR_SSL_ONLY; |
| } |
| } |
| |
| net::SettingsMap GetHttp2Settings( |
| const VariationParameters& http2_trial_params) { |
| net::SettingsMap http2_settings; |
| |
| const std::string settings_string = |
| GetVariationParam(http2_trial_params, "http2_settings"); |
| |
| base::StringPairs key_value_pairs; |
| if (!base::SplitStringIntoKeyValuePairs(settings_string, ':', ',', |
| &key_value_pairs)) { |
| return http2_settings; |
| } |
| |
| for (auto key_value : key_value_pairs) { |
| uint32_t key; |
| if (!base::StringToUint(key_value.first, &key)) |
| continue; |
| uint32_t value; |
| if (!base::StringToUint(key_value.second, &value)) |
| continue; |
| http2_settings[static_cast<net::SpdySettingsIds>(key)] = value; |
| } |
| |
| return http2_settings; |
| } |
| |
| bool ConfigureWebsocketOverHttp2( |
| const base::CommandLine& command_line, |
| const VariationParameters& http2_trial_params) { |
| if (command_line.HasSwitch(switches::kEnableWebsocketOverHttp2)) |
| return true; |
| |
| const std::string websocket_value = |
| GetVariationParam(http2_trial_params, "websocket_over_http2"); |
| return websocket_value == "true"; |
| } |
| |
| void ConfigureHttp2Params(const base::CommandLine& command_line, |
| base::StringPiece http2_trial_group, |
| const VariationParameters& http2_trial_params, |
| net::HttpNetworkSession::Params* params) { |
| if (http2_trial_group.starts_with(kHttp2FieldTrialDisablePrefix)) { |
| params->enable_http2 = false; |
| return; |
| } |
| params->http2_settings = GetHttp2Settings(http2_trial_params); |
| params->enable_websocket_over_http2 = |
| ConfigureWebsocketOverHttp2(command_line, http2_trial_params); |
| } |
| |
| bool ShouldEnableQuic(base::StringPiece quic_trial_group, |
| const VariationParameters& quic_trial_params, |
| bool is_quic_force_disabled, |
| bool is_quic_force_enabled) { |
| if (is_quic_force_disabled) |
| return false; |
| if (is_quic_force_enabled) |
| return true; |
| |
| return quic_trial_group.starts_with(kQuicFieldTrialEnabledGroupName) || |
| quic_trial_group.starts_with(kQuicFieldTrialHttpsEnabledGroupName) || |
| base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, "enable_quic"), "true"); |
| } |
| |
| bool ShouldMarkQuicBrokenWhenNetworkBlackholes( |
| const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, |
| "mark_quic_broken_when_network_blackholes"), |
| "true"); |
| } |
| |
| bool ShouldRetryWithoutAltSvcOnQuicErrors( |
| const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, |
| "retry_without_alt_svc_on_quic_errors"), |
| "true"); |
| } |
| |
| bool ShouldSupportIetfFormatQuicAltSvc( |
| const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, "support_ietf_format_quic_altsvc"), |
| "true"); |
| } |
| |
| net::QuicTagVector GetQuicConnectionOptions( |
| const VariationParameters& quic_trial_params) { |
| VariationParameters::const_iterator it = |
| quic_trial_params.find("connection_options"); |
| if (it == quic_trial_params.end()) { |
| return net::QuicTagVector(); |
| } |
| |
| return net::ParseQuicConnectionOptions(it->second); |
| } |
| |
| net::QuicTagVector GetQuicClientConnectionOptions( |
| const VariationParameters& quic_trial_params) { |
| VariationParameters::const_iterator it = |
| quic_trial_params.find("client_connection_options"); |
| if (it == quic_trial_params.end()) { |
| return net::QuicTagVector(); |
| } |
| |
| return net::ParseQuicConnectionOptions(it->second); |
| } |
| |
| bool ShouldQuicCloseSessionsOnIpChange( |
| const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, "close_sessions_on_ip_change"), |
| "true"); |
| } |
| |
| int GetQuicIdleConnectionTimeoutSeconds( |
| const VariationParameters& quic_trial_params) { |
| int value; |
| if (base::StringToInt(GetVariationParam(quic_trial_params, |
| "idle_connection_timeout_seconds"), |
| &value)) { |
| return value; |
| } |
| return 0; |
| } |
| |
| int GetQuicReducedPingTimeoutSeconds( |
| const VariationParameters& quic_trial_params) { |
| int value; |
| if (base::StringToInt( |
| GetVariationParam(quic_trial_params, "reduced_ping_timeout_seconds"), |
| &value)) { |
| return value; |
| } |
| return 0; |
| } |
| |
| int GetQuicMaxTimeBeforeCryptoHandshakeSeconds( |
| const VariationParameters& quic_trial_params) { |
| int value; |
| if (base::StringToInt( |
| GetVariationParam(quic_trial_params, |
| "max_time_before_crypto_handshake_seconds"), |
| &value)) { |
| return value; |
| } |
| return 0; |
| } |
| |
| int GetQuicMaxIdleTimeBeforeCryptoHandshakeSeconds( |
| const VariationParameters& quic_trial_params) { |
| int value; |
| if (base::StringToInt( |
| GetVariationParam(quic_trial_params, |
| "max_idle_time_before_crypto_handshake_seconds"), |
| &value)) { |
| return value; |
| } |
| return 0; |
| } |
| |
| bool ShouldQuicRaceCertVerification( |
| const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, "race_cert_verification"), "true"); |
| } |
| |
| bool ShouldQuicEstimateInitialRtt( |
| const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, "estimate_initial_rtt"), "true"); |
| } |
| |
| bool ShouldQuicHeadersIncludeH2StreamDependencies( |
| const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, |
| "headers_include_h2_stream_dependency"), |
| "true"); |
| } |
| |
| bool ShouldQuicConnectUsingDefaultNetwork( |
| const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, "connect_using_default_network"), |
| "true"); |
| } |
| |
| bool ShouldQuicMigrateSessionsOnNetworkChange( |
| const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, |
| "migrate_sessions_on_network_change"), |
| "true"); |
| } |
| |
| bool ShouldQuicMigrateSessionsEarly( |
| const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, "migrate_sessions_early"), "true"); |
| } |
| |
| bool ShouldQuicMigrateSessionsOnNetworkChangeV2( |
| const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, |
| "migrate_sessions_on_network_change_v2"), |
| "true"); |
| } |
| |
| bool ShouldQuicMigrateSessionsEarlyV2( |
| const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, "migrate_sessions_early_v2"), |
| "true"); |
| } |
| |
| int GetQuicMaxTimeOnNonDefaultNetworkSeconds( |
| const VariationParameters& quic_trial_params) { |
| int value; |
| if (base::StringToInt( |
| GetVariationParam(quic_trial_params, |
| "max_time_on_non_default_network_seconds"), |
| &value)) { |
| return value; |
| } |
| return 0; |
| } |
| |
| int GetQuicMaxNumMigrationsToNonDefaultNetworkOnPathDegrading( |
| const VariationParameters& quic_trial_params) { |
| int value; |
| if (base::StringToInt( |
| GetVariationParam( |
| quic_trial_params, |
| "max_migrations_to_non_default_network_on_path_degrading"), |
| &value)) { |
| return value; |
| } |
| return 0; |
| } |
| |
| bool ShouldQuicAllowServerMigration( |
| const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, "allow_server_migration"), "true"); |
| } |
| |
| base::flat_set<std::string> GetQuicHostWhitelist( |
| const VariationParameters& quic_trial_params) { |
| std::string host_whitelist = |
| GetVariationParam(quic_trial_params, "host_whitelist"); |
| std::vector<std::string> host_vector = base::SplitString( |
| host_whitelist, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL); |
| return base::flat_set<std::string>(std::move(host_vector)); |
| } |
| |
| size_t GetQuicMaxPacketLength(const VariationParameters& quic_trial_params) { |
| unsigned value; |
| if (base::StringToUint( |
| GetVariationParam(quic_trial_params, "max_packet_length"), &value)) { |
| return value; |
| } |
| return 0; |
| } |
| |
| net::QuicTransportVersionVector GetQuicVersions( |
| const VariationParameters& quic_trial_params) { |
| return network_session_configurator::ParseQuicVersions( |
| GetVariationParam(quic_trial_params, "quic_version")); |
| } |
| |
| bool ShouldEnableServerPushCancelation( |
| const VariationParameters& quic_trial_params) { |
| return base::LowerCaseEqualsASCII( |
| GetVariationParam(quic_trial_params, "enable_server_push_cancellation"), |
| "true"); |
| } |
| |
| void ConfigureQuicParams(base::StringPiece quic_trial_group, |
| const VariationParameters& quic_trial_params, |
| bool is_quic_force_disabled, |
| bool is_quic_force_enabled, |
| const std::string& quic_user_agent_id, |
| net::HttpNetworkSession::Params* params) { |
| params->enable_quic = |
| ShouldEnableQuic(quic_trial_group, quic_trial_params, |
| is_quic_force_disabled, is_quic_force_enabled); |
| params->mark_quic_broken_when_network_blackholes = |
| ShouldMarkQuicBrokenWhenNetworkBlackholes(quic_trial_params); |
| |
| params->enable_server_push_cancellation = |
| ShouldEnableServerPushCancelation(quic_trial_params); |
| |
| params->retry_without_alt_svc_on_quic_errors = |
| ShouldRetryWithoutAltSvcOnQuicErrors(quic_trial_params); |
| |
| params->support_ietf_format_quic_altsvc = |
| ShouldSupportIetfFormatQuicAltSvc(quic_trial_params); |
| |
| if (params->enable_quic) { |
| params->quic_connection_options = |
| GetQuicConnectionOptions(quic_trial_params); |
| params->quic_client_connection_options = |
| GetQuicClientConnectionOptions(quic_trial_params); |
| params->quic_close_sessions_on_ip_change = |
| ShouldQuicCloseSessionsOnIpChange(quic_trial_params); |
| int idle_connection_timeout_seconds = |
| GetQuicIdleConnectionTimeoutSeconds(quic_trial_params); |
| if (idle_connection_timeout_seconds != 0) { |
| params->quic_idle_connection_timeout_seconds = |
| idle_connection_timeout_seconds; |
| } |
| int reduced_ping_timeout_seconds = |
| GetQuicReducedPingTimeoutSeconds(quic_trial_params); |
| if (reduced_ping_timeout_seconds > 0 && |
| reduced_ping_timeout_seconds < net::kPingTimeoutSecs) { |
| params->quic_reduced_ping_timeout_seconds = reduced_ping_timeout_seconds; |
| } |
| int max_time_before_crypto_handshake_seconds = |
| GetQuicMaxTimeBeforeCryptoHandshakeSeconds(quic_trial_params); |
| if (max_time_before_crypto_handshake_seconds > 0) { |
| params->quic_max_time_before_crypto_handshake_seconds = |
| max_time_before_crypto_handshake_seconds; |
| } |
| int max_idle_time_before_crypto_handshake_seconds = |
| GetQuicMaxIdleTimeBeforeCryptoHandshakeSeconds(quic_trial_params); |
| if (max_idle_time_before_crypto_handshake_seconds > 0) { |
| params->quic_max_idle_time_before_crypto_handshake_seconds = |
| max_idle_time_before_crypto_handshake_seconds; |
| } |
| params->quic_race_cert_verification = |
| ShouldQuicRaceCertVerification(quic_trial_params); |
| params->quic_estimate_initial_rtt = |
| ShouldQuicEstimateInitialRtt(quic_trial_params); |
| params->quic_headers_include_h2_stream_dependency = |
| ShouldQuicHeadersIncludeH2StreamDependencies(quic_trial_params); |
| params->quic_connect_using_default_network = |
| ShouldQuicConnectUsingDefaultNetwork(quic_trial_params); |
| params->quic_migrate_sessions_on_network_change = |
| ShouldQuicMigrateSessionsOnNetworkChange(quic_trial_params); |
| params->quic_migrate_sessions_early = |
| ShouldQuicMigrateSessionsEarly(quic_trial_params); |
| params->quic_migrate_sessions_on_network_change_v2 = |
| ShouldQuicMigrateSessionsOnNetworkChangeV2(quic_trial_params); |
| params->quic_migrate_sessions_early_v2 = |
| ShouldQuicMigrateSessionsEarlyV2(quic_trial_params); |
| int max_time_on_non_default_network_seconds = |
| GetQuicMaxTimeOnNonDefaultNetworkSeconds(quic_trial_params); |
| if (max_time_on_non_default_network_seconds > 0) { |
| params->quic_max_time_on_non_default_network = |
| base::TimeDelta::FromSeconds(max_time_on_non_default_network_seconds); |
| } |
| int max_migrations_to_non_default_network_on_path_degrading = |
| GetQuicMaxNumMigrationsToNonDefaultNetworkOnPathDegrading( |
| quic_trial_params); |
| if (max_migrations_to_non_default_network_on_path_degrading > 0) { |
| params->quic_max_migrations_to_non_default_network_on_path_degrading = |
| max_migrations_to_non_default_network_on_path_degrading; |
| } |
| params->quic_allow_server_migration = |
| ShouldQuicAllowServerMigration(quic_trial_params); |
| params->quic_host_whitelist = GetQuicHostWhitelist(quic_trial_params); |
| } |
| |
| size_t max_packet_length = GetQuicMaxPacketLength(quic_trial_params); |
| if (max_packet_length != 0) { |
| params->quic_max_packet_length = max_packet_length; |
| } |
| |
| params->quic_user_agent_id = quic_user_agent_id; |
| |
| net::QuicTransportVersionVector supported_versions = |
| GetQuicVersions(quic_trial_params); |
| if (!supported_versions.empty()) |
| params->quic_supported_versions = supported_versions; |
| } |
| |
| } // anonymous namespace |
| |
| namespace network_session_configurator { |
| |
| net::QuicTransportVersionVector ParseQuicVersions( |
| const std::string& quic_versions) { |
| net::QuicTransportVersionVector supported_versions; |
| net::QuicTransportVersionVector all_supported_versions = |
| net::AllSupportedTransportVersions(); |
| |
| for (const base::StringPiece& version : base::SplitStringPiece( |
| quic_versions, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL)) { |
| auto it = all_supported_versions.begin(); |
| while (it != all_supported_versions.end()) { |
| if (net::QuicVersionToString(*it) == version) { |
| supported_versions.push_back(*it); |
| // Remove the supported version to deduplicate versions extracted from |
| // |quic_versions|. |
| all_supported_versions.erase(it); |
| break; |
| } |
| it++; |
| } |
| } |
| return supported_versions; |
| } |
| |
| void ParseCommandLineAndFieldTrials(const base::CommandLine& command_line, |
| bool is_quic_force_disabled, |
| const std::string& quic_user_agent_id, |
| net::HttpNetworkSession::Params* params) { |
| is_quic_force_disabled |= command_line.HasSwitch(switches::kDisableQuic); |
| bool is_quic_force_enabled = command_line.HasSwitch(switches::kEnableQuic); |
| |
| std::string quic_trial_group = |
| base::FieldTrialList::FindFullName(kQuicFieldTrialName); |
| VariationParameters quic_trial_params; |
| if (!variations::GetVariationParams(kQuicFieldTrialName, &quic_trial_params)) |
| quic_trial_params.clear(); |
| ConfigureQuicParams(quic_trial_group, quic_trial_params, |
| is_quic_force_disabled, is_quic_force_enabled, |
| quic_user_agent_id, params); |
| |
| std::string http2_trial_group = |
| base::FieldTrialList::FindFullName(kHttp2FieldTrialName); |
| VariationParameters http2_trial_params; |
| if (!variations::GetVariationParams(kHttp2FieldTrialName, |
| &http2_trial_params)) |
| http2_trial_params.clear(); |
| ConfigureHttp2Params(command_line, http2_trial_group, http2_trial_params, |
| params); |
| |
| const std::string tfo_trial_group = |
| base::FieldTrialList::FindFullName(kTCPFastOpenFieldTrialName); |
| ConfigureTCPFastOpenParams(command_line, tfo_trial_group, params); |
| |
| // Command line flags override field trials. |
| if (command_line.HasSwitch(switches::kDisableHttp2)) |
| params->enable_http2 = false; |
| |
| if (params->enable_quic) { |
| if (command_line.HasSwitch(switches::kQuicConnectionOptions)) { |
| params->quic_connection_options = net::ParseQuicConnectionOptions( |
| command_line.GetSwitchValueASCII(switches::kQuicConnectionOptions)); |
| } |
| |
| if (command_line.HasSwitch(switches::kQuicMaxPacketLength)) { |
| unsigned value; |
| if (base::StringToUint( |
| command_line.GetSwitchValueASCII(switches::kQuicMaxPacketLength), |
| &value)) { |
| params->quic_max_packet_length = value; |
| } |
| } |
| |
| if (command_line.HasSwitch(switches::kQuicVersion)) { |
| net::QuicTransportVersionVector supported_versions = |
| network_session_configurator::ParseQuicVersions( |
| command_line.GetSwitchValueASCII(switches::kQuicVersion)); |
| if (!supported_versions.empty()) |
| params->quic_supported_versions = supported_versions; |
| } |
| |
| if (command_line.HasSwitch(switches::kOriginToForceQuicOn)) { |
| std::string origins = |
| command_line.GetSwitchValueASCII(switches::kOriginToForceQuicOn); |
| for (const std::string& host_port : base::SplitString( |
| origins, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL)) { |
| if (host_port == "*") |
| params->origins_to_force_quic_on.insert(net::HostPortPair()); |
| net::HostPortPair quic_origin = |
| net::HostPortPair::FromString(host_port); |
| if (!quic_origin.IsEmpty()) |
| params->origins_to_force_quic_on.insert(quic_origin); |
| } |
| } |
| } |
| |
| // Parameters only controlled by command line. |
| if (command_line.HasSwitch(switches::kEnableUserAlternateProtocolPorts)) { |
| params->enable_user_alternate_protocol_ports = true; |
| } |
| if (command_line.HasSwitch(switches::kIgnoreCertificateErrors)) { |
| params->ignore_certificate_errors = true; |
| } |
| UMA_HISTOGRAM_BOOLEAN( |
| "Net.Certificate.IgnoreErrors", |
| command_line.HasSwitch(switches::kIgnoreCertificateErrors)); |
| if (command_line.HasSwitch(switches::kTestingFixedHttpPort)) { |
| params->testing_fixed_http_port = |
| GetSwitchValueAsInt(command_line, switches::kTestingFixedHttpPort); |
| } |
| if (command_line.HasSwitch(switches::kTestingFixedHttpsPort)) { |
| params->testing_fixed_https_port = |
| GetSwitchValueAsInt(command_line, switches::kTestingFixedHttpsPort); |
| } |
| |
| if (command_line.HasSwitch(switches::kHostRules)) { |
| params->host_mapping_rules.SetRulesFromString( |
| command_line.GetSwitchValueASCII(switches::kHostRules)); |
| } |
| |
| params->enable_token_binding = |
| base::FeatureList::IsEnabled(features::kTokenBinding); |
| } |
| |
| net::URLRequestContextBuilder::HttpCacheParams::Type ChooseCacheType( |
| const base::CommandLine& command_line) { |
| #if !defined(OS_ANDROID) |
| if (command_line.HasSwitch(switches::kUseSimpleCacheBackend)) { |
| const std::string opt_value = |
| command_line.GetSwitchValueASCII(switches::kUseSimpleCacheBackend); |
| if (base::LowerCaseEqualsASCII(opt_value, "off")) |
| return net::URLRequestContextBuilder::HttpCacheParams::DISK_BLOCKFILE; |
| if (opt_value.empty() || base::LowerCaseEqualsASCII(opt_value, "on")) |
| return net::URLRequestContextBuilder::HttpCacheParams::DISK_SIMPLE; |
| } |
| const std::string experiment_name = |
| base::FieldTrialList::FindFullName("SimpleCacheTrial"); |
| if (base::StartsWith(experiment_name, "Disable", |
| base::CompareCase::INSENSITIVE_ASCII)) { |
| return net::URLRequestContextBuilder::HttpCacheParams::DISK_BLOCKFILE; |
| } |
| if (base::StartsWith(experiment_name, "ExperimentYes", |
| base::CompareCase::INSENSITIVE_ASCII)) { |
| return net::URLRequestContextBuilder::HttpCacheParams::DISK_SIMPLE; |
| } |
| #endif // #if !defined(OS_ANDROID) |
| |
| #if defined(OS_ANDROID) || defined(OS_LINUX) || defined(OS_CHROMEOS) |
| return net::URLRequestContextBuilder::HttpCacheParams::DISK_SIMPLE; |
| #else |
| return net::URLRequestContextBuilder::HttpCacheParams::DISK_BLOCKFILE; |
| #endif |
| } |
| |
| } // namespace network_session_configurator |
