| // Copyright (c) 2012 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 "net/http/http_network_session.h" |
| |
| #include <inttypes.h> |
| |
| #include <utility> |
| |
| #include "base/atomic_sequence_num.h" |
| #include "base/compiler_specific.h" |
| #include "base/debug/stack_trace.h" |
| #include "base/logging.h" |
| #include "base/strings/string_number_conversions.h" |
| #include "base/strings/string_util.h" |
| #include "base/strings/stringprintf.h" |
| #include "base/trace_event/memory_allocator_dump.h" |
| #include "base/trace_event/memory_dump_request_args.h" |
| #include "base/trace_event/process_memory_dump.h" |
| #include "base/values.h" |
| #include "net/http/http_auth_handler_factory.h" |
| #include "net/http/http_response_body_drainer.h" |
| #include "net/http/http_stream_factory.h" |
| #include "net/http/url_security_manager.h" |
| #include "net/proxy_resolution/proxy_resolution_service.h" |
| #include "net/quic/quic_crypto_client_stream_factory.h" |
| #include "net/quic/quic_stream_factory.h" |
| #include "net/socket/client_socket_factory.h" |
| #include "net/socket/client_socket_pool_manager_impl.h" |
| #include "net/socket/next_proto.h" |
| #include "net/socket/ssl_client_socket.h" |
| #include "net/spdy/spdy_session_pool.h" |
| #include "net/third_party/quic/core/crypto/quic_random.h" |
| #include "net/third_party/quic/core/quic_packets.h" |
| #include "net/third_party/quic/core/quic_tag.h" |
| #include "net/third_party/quic/core/quic_utils.h" |
| #include "net/third_party/quic/platform/impl/quic_chromium_clock.h" |
| |
| namespace net { |
| |
| namespace { |
| |
| std::unique_ptr<ClientSocketPoolManager> CreateSocketPoolManager( |
| HttpNetworkSession::SocketPoolType pool_type, |
| const HttpNetworkSession::Context& context, |
| SSLClientSessionCache* ssl_client_session_cache, |
| WebSocketEndpointLockManager* websocket_endpoint_lock_manager) { |
| // TODO(yutak): Differentiate WebSocket pool manager and allow more |
| // simultaneous connections for WebSockets. |
| return std::make_unique<ClientSocketPoolManagerImpl>( |
| context.net_log, |
| context.client_socket_factory ? context.client_socket_factory |
| : ClientSocketFactory::GetDefaultFactory(), |
| context.socket_performance_watcher_factory, |
| context.network_quality_estimator, context.host_resolver, |
| context.cert_verifier, context.channel_id_service, |
| context.transport_security_state, context.cert_transparency_verifier, |
| context.ct_policy_enforcer, ssl_client_session_cache, |
| context.ssl_config_service, websocket_endpoint_lock_manager, |
| context.proxy_delegate, pool_type); |
| } |
| |
| } // unnamed namespace |
| |
| // The maximum receive window sizes for HTTP/2 sessions and streams. |
| const int32_t kSpdySessionMaxRecvWindowSize = 15 * 1024 * 1024; // 15 MB |
| const int32_t kSpdyStreamMaxRecvWindowSize = 6 * 1024 * 1024; // 6 MB |
| |
| namespace { |
| |
| // Keep all HTTP2 parameters in |http2_settings|, even the ones that are not |
| // implemented, to be sent to the server. |
| // Set default values for settings that |http2_settings| does not specify. |
| spdy::SettingsMap AddDefaultHttp2Settings(spdy::SettingsMap http2_settings) { |
| // Set default values only if |http2_settings| does not have |
| // a value set for given setting. |
| auto it = http2_settings.find(spdy::SETTINGS_HEADER_TABLE_SIZE); |
| if (it == http2_settings.end()) |
| http2_settings[spdy::SETTINGS_HEADER_TABLE_SIZE] = kSpdyMaxHeaderTableSize; |
| |
| it = http2_settings.find(spdy::SETTINGS_MAX_CONCURRENT_STREAMS); |
| if (it == http2_settings.end()) |
| http2_settings[spdy::SETTINGS_MAX_CONCURRENT_STREAMS] = |
| kSpdyMaxConcurrentPushedStreams; |
| |
| it = http2_settings.find(spdy::SETTINGS_INITIAL_WINDOW_SIZE); |
| if (it == http2_settings.end()) |
| http2_settings[spdy::SETTINGS_INITIAL_WINDOW_SIZE] = |
| kSpdyStreamMaxRecvWindowSize; |
| |
| return http2_settings; |
| } |
| |
| } // unnamed namespace |
| |
| HttpNetworkSession::Params::Params() |
| : enable_server_push_cancellation(false), |
| ignore_certificate_errors(false), |
| testing_fixed_http_port(0), |
| testing_fixed_https_port(0), |
| enable_user_alternate_protocol_ports(false), |
| enable_spdy_ping_based_connection_checking(true), |
| enable_http2(true), |
| spdy_session_max_recv_window_size(kSpdySessionMaxRecvWindowSize), |
| time_func(&base::TimeTicks::Now), |
| enable_http2_alternative_service(false), |
| enable_websocket_over_http2(false), |
| enable_quic(false), |
| enable_quic_proxies_for_https_urls(false), |
| quic_max_packet_length(quic::kDefaultMaxPacketSize), |
| quic_max_server_configs_stored_in_properties(0u), |
| quic_enable_socket_recv_optimization(false), |
| mark_quic_broken_when_network_blackholes(false), |
| retry_without_alt_svc_on_quic_errors(true), |
| support_ietf_format_quic_altsvc(false), |
| quic_close_sessions_on_ip_change(false), |
| quic_goaway_sessions_on_ip_change(false), |
| quic_idle_connection_timeout_seconds(kIdleConnectionTimeoutSeconds), |
| quic_reduced_ping_timeout_seconds(quic::kPingTimeoutSecs), |
| quic_max_time_before_crypto_handshake_seconds( |
| quic::kMaxTimeForCryptoHandshakeSecs), |
| quic_max_idle_time_before_crypto_handshake_seconds( |
| quic::kInitialIdleTimeoutSecs), |
| quic_migrate_sessions_on_network_change_v2(false), |
| quic_migrate_sessions_early_v2(false), |
| quic_retry_on_alternate_network_before_handshake(false), |
| quic_max_time_on_non_default_network( |
| base::TimeDelta::FromSeconds(kMaxTimeOnNonDefaultNetworkSecs)), |
| quic_max_migrations_to_non_default_network_on_write_error( |
| kMaxMigrationsToNonDefaultNetworkOnWriteError), |
| quic_max_migrations_to_non_default_network_on_path_degrading( |
| kMaxMigrationsToNonDefaultNetworkOnPathDegrading), |
| quic_allow_server_migration(false), |
| quic_allow_remote_alt_svc(true), |
| quic_race_stale_dns_on_connection(false), |
| quic_go_away_on_path_degrading(false), |
| quic_disable_bidirectional_streams(false), |
| quic_force_hol_blocking(false), |
| quic_race_cert_verification(false), |
| quic_estimate_initial_rtt(false), |
| quic_headers_include_h2_stream_dependency(false), |
| enable_channel_id(false), |
| http_09_on_non_default_ports_enabled(false), |
| disable_idle_sockets_close_on_memory_pressure(false) { |
| quic_supported_versions.push_back(quic::QUIC_VERSION_43); |
| } |
| |
| HttpNetworkSession::Params::Params(const Params& other) = default; |
| |
| HttpNetworkSession::Params::~Params() = default; |
| |
| HttpNetworkSession::Context::Context() |
| : client_socket_factory(nullptr), |
| host_resolver(nullptr), |
| cert_verifier(nullptr), |
| channel_id_service(nullptr), |
| transport_security_state(nullptr), |
| cert_transparency_verifier(nullptr), |
| ct_policy_enforcer(nullptr), |
| proxy_resolution_service(nullptr), |
| proxy_delegate(nullptr), |
| ssl_config_service(nullptr), |
| http_auth_handler_factory(nullptr), |
| net_log(nullptr), |
| socket_performance_watcher_factory(nullptr), |
| network_quality_estimator(nullptr), |
| #if BUILDFLAG(ENABLE_REPORTING) |
| reporting_service(nullptr), |
| network_error_logging_service(nullptr), |
| #endif |
| quic_clock(nullptr), |
| quic_random(nullptr), |
| quic_crypto_client_stream_factory( |
| QuicCryptoClientStreamFactory::GetDefaultFactory()) { |
| } |
| |
| HttpNetworkSession::Context::Context(const Context& other) = default; |
| |
| HttpNetworkSession::Context::~Context() = default; |
| |
| // TODO(mbelshe): Move the socket factories into HttpStreamFactory. |
| HttpNetworkSession::HttpNetworkSession(const Params& params, |
| const Context& context) |
| : net_log_(context.net_log), |
| http_server_properties_(context.http_server_properties), |
| cert_verifier_(context.cert_verifier), |
| http_auth_handler_factory_(context.http_auth_handler_factory), |
| #if BUILDFLAG(ENABLE_REPORTING) |
| reporting_service_(context.reporting_service), |
| network_error_logging_service_(context.network_error_logging_service), |
| #endif |
| proxy_resolution_service_(context.proxy_resolution_service), |
| ssl_config_service_(context.ssl_config_service), |
| ssl_client_session_cache_(SSLClientSessionCache::Config()), |
| push_delegate_(nullptr), |
| quic_stream_factory_( |
| context.net_log, |
| context.host_resolver, |
| context.ssl_config_service, |
| context.client_socket_factory |
| ? context.client_socket_factory |
| : ClientSocketFactory::GetDefaultFactory(), |
| context.http_server_properties, |
| context.cert_verifier, |
| context.ct_policy_enforcer, |
| context.transport_security_state, |
| context.cert_transparency_verifier, |
| context.socket_performance_watcher_factory, |
| context.quic_crypto_client_stream_factory, |
| context.quic_random ? context.quic_random |
| : quic::QuicRandom::GetInstance(), |
| context.quic_clock ? context.quic_clock |
| : quic::QuicChromiumClock::GetInstance(), |
| params.quic_max_packet_length, |
| params.quic_user_agent_id, |
| params.quic_max_server_configs_stored_in_properties > 0, |
| params.quic_close_sessions_on_ip_change, |
| params.quic_goaway_sessions_on_ip_change, |
| params.mark_quic_broken_when_network_blackholes, |
| params.quic_idle_connection_timeout_seconds, |
| params.quic_reduced_ping_timeout_seconds, |
| params.quic_max_time_before_crypto_handshake_seconds, |
| params.quic_max_idle_time_before_crypto_handshake_seconds, |
| params.quic_migrate_sessions_on_network_change_v2, |
| params.quic_migrate_sessions_early_v2, |
| params.quic_retry_on_alternate_network_before_handshake, |
| params.quic_max_time_on_non_default_network, |
| params.quic_max_migrations_to_non_default_network_on_write_error, |
| params.quic_max_migrations_to_non_default_network_on_path_degrading, |
| params.quic_allow_server_migration, |
| params.quic_race_stale_dns_on_connection, |
| params.quic_go_away_on_path_degrading, |
| params.quic_race_cert_verification, |
| params.quic_estimate_initial_rtt, |
| params.quic_headers_include_h2_stream_dependency, |
| params.quic_connection_options, |
| params.quic_client_connection_options, |
| params.quic_enable_socket_recv_optimization), |
| spdy_session_pool_(context.host_resolver, |
| context.ssl_config_service, |
| context.http_server_properties, |
| context.transport_security_state, |
| params.quic_supported_versions, |
| params.enable_spdy_ping_based_connection_checking, |
| params.support_ietf_format_quic_altsvc, |
| params.spdy_session_max_recv_window_size, |
| AddDefaultHttp2Settings(params.http2_settings), |
| params.greased_http2_frame, |
| params.time_func, |
| context.network_quality_estimator), |
| http_stream_factory_(std::make_unique<HttpStreamFactory>(this)), |
| params_(params), |
| context_(context) { |
| DCHECK(proxy_resolution_service_); |
| DCHECK(ssl_config_service_); |
| CHECK(http_server_properties_); |
| |
| normal_socket_pool_manager_ = CreateSocketPoolManager( |
| NORMAL_SOCKET_POOL, context, &ssl_client_session_cache_, |
| &websocket_endpoint_lock_manager_); |
| websocket_socket_pool_manager_ = CreateSocketPoolManager( |
| WEBSOCKET_SOCKET_POOL, context, &ssl_client_session_cache_, |
| &websocket_endpoint_lock_manager_); |
| |
| if (params_.enable_http2) { |
| next_protos_.push_back(kProtoHTTP2); |
| } |
| |
| next_protos_.push_back(kProtoHTTP11); |
| |
| http_server_properties_->SetMaxServerConfigsStoredInProperties( |
| params.quic_max_server_configs_stored_in_properties); |
| |
| if (!params_.disable_idle_sockets_close_on_memory_pressure) { |
| memory_pressure_listener_.reset( |
| new base::MemoryPressureListener(base::BindRepeating( |
| &HttpNetworkSession::OnMemoryPressure, base::Unretained(this)))); |
| } |
| } |
| |
| HttpNetworkSession::~HttpNetworkSession() { |
| DCHECK_CALLED_ON_VALID_THREAD(thread_checker_); |
| response_drainers_.clear(); |
| // TODO(bnc): CloseAllSessions() is also called in SpdySessionPool destructor, |
| // one of the two calls should be removed. |
| spdy_session_pool_.CloseAllSessions(); |
| } |
| |
| void HttpNetworkSession::AddResponseDrainer( |
| std::unique_ptr<HttpResponseBodyDrainer> drainer) { |
| DCHECK(!base::ContainsKey(response_drainers_, drainer.get())); |
| HttpResponseBodyDrainer* drainer_ptr = drainer.get(); |
| response_drainers_[drainer_ptr] = std::move(drainer); |
| } |
| |
| void HttpNetworkSession::RemoveResponseDrainer( |
| HttpResponseBodyDrainer* drainer) { |
| DCHECK(base::ContainsKey(response_drainers_, drainer)); |
| response_drainers_[drainer].release(); |
| response_drainers_.erase(drainer); |
| } |
| |
| TransportClientSocketPool* HttpNetworkSession::GetTransportSocketPool( |
| SocketPoolType pool_type) { |
| return GetSocketPoolManager(pool_type)->GetTransportSocketPool(); |
| } |
| |
| TransportClientSocketPool* HttpNetworkSession::GetSocketPoolForSOCKSProxy( |
| SocketPoolType pool_type, |
| const ProxyServer& socks_proxy) { |
| return GetSocketPoolManager(pool_type)->GetSocketPoolForSOCKSProxy( |
| socks_proxy); |
| } |
| |
| TransportClientSocketPool* HttpNetworkSession::GetSocketPoolForHTTPLikeProxy( |
| SocketPoolType pool_type, |
| const ProxyServer& http_proxy) { |
| return GetSocketPoolManager(pool_type)->GetSocketPoolForHTTPLikeProxy( |
| http_proxy); |
| } |
| |
| TransportClientSocketPool* HttpNetworkSession::GetSocketPoolForSSLWithProxy( |
| SocketPoolType pool_type, |
| const ProxyServer& proxy_server) { |
| return GetSocketPoolManager(pool_type)->GetSocketPoolForSSLWithProxy( |
| proxy_server); |
| } |
| |
| std::unique_ptr<base::Value> HttpNetworkSession::SocketPoolInfoToValue() const { |
| // TODO(yutak): Should merge values from normal pools and WebSocket pools. |
| return normal_socket_pool_manager_->SocketPoolInfoToValue(); |
| } |
| |
| std::unique_ptr<base::Value> HttpNetworkSession::SpdySessionPoolInfoToValue() |
| const { |
| return spdy_session_pool_.SpdySessionPoolInfoToValue(); |
| } |
| |
| std::unique_ptr<base::Value> HttpNetworkSession::QuicInfoToValue() const { |
| std::unique_ptr<base::DictionaryValue> dict(new base::DictionaryValue()); |
| dict->Set("sessions", quic_stream_factory_.QuicStreamFactoryInfoToValue()); |
| dict->SetBoolean("quic_enabled", IsQuicEnabled()); |
| |
| auto connection_options(std::make_unique<base::ListValue>()); |
| for (const auto& option : params_.quic_connection_options) |
| connection_options->AppendString(quic::QuicTagToString(option)); |
| dict->Set("connection_options", std::move(connection_options)); |
| |
| auto supported_versions(std::make_unique<base::ListValue>()); |
| for (const auto& version : params_.quic_supported_versions) |
| supported_versions->AppendString(QuicVersionToString(version)); |
| dict->Set("supported_versions", std::move(supported_versions)); |
| |
| auto origins_to_force_quic_on(std::make_unique<base::ListValue>()); |
| for (const auto& origin : params_.origins_to_force_quic_on) |
| origins_to_force_quic_on->AppendString(origin.ToString()); |
| dict->Set("origins_to_force_quic_on", std::move(origins_to_force_quic_on)); |
| |
| dict->SetInteger("max_packet_length", params_.quic_max_packet_length); |
| dict->SetInteger("max_server_configs_stored_in_properties", |
| params_.quic_max_server_configs_stored_in_properties); |
| dict->SetInteger("idle_connection_timeout_seconds", |
| params_.quic_idle_connection_timeout_seconds); |
| dict->SetInteger("reduced_ping_timeout_seconds", |
| params_.quic_reduced_ping_timeout_seconds); |
| dict->SetBoolean("mark_quic_broken_when_network_blackholes", |
| params_.mark_quic_broken_when_network_blackholes); |
| dict->SetBoolean("retry_without_alt_svc_on_quic_errors", |
| params_.retry_without_alt_svc_on_quic_errors); |
| dict->SetBoolean("race_cert_verification", |
| params_.quic_race_cert_verification); |
| dict->SetBoolean("disable_bidirectional_streams", |
| params_.quic_disable_bidirectional_streams); |
| dict->SetBoolean("close_sessions_on_ip_change", |
| params_.quic_close_sessions_on_ip_change); |
| dict->SetBoolean("goaway_sessions_on_ip_change", |
| params_.quic_goaway_sessions_on_ip_change); |
| dict->SetBoolean("migrate_sessions_on_network_change_v2", |
| params_.quic_migrate_sessions_on_network_change_v2); |
| dict->SetBoolean("migrate_sessions_early_v2", |
| params_.quic_migrate_sessions_early_v2); |
| dict->SetBoolean("retry_on_alternate_network_before_handshake", |
| params_.quic_retry_on_alternate_network_before_handshake); |
| dict->SetInteger("max_time_on_non_default_network_seconds", |
| params_.quic_max_time_on_non_default_network.InSeconds()); |
| dict->SetInteger( |
| "max_num_migrations_to_non_default_network_on_write_error", |
| params_.quic_max_migrations_to_non_default_network_on_write_error); |
| dict->SetInteger( |
| "max_num_migrations_to_non_default_network_on_path_degrading", |
| params_.quic_max_migrations_to_non_default_network_on_path_degrading); |
| dict->SetBoolean("allow_server_migration", |
| params_.quic_allow_server_migration); |
| dict->SetBoolean("race_stale_dns_on_connection", |
| params_.quic_race_stale_dns_on_connection); |
| dict->SetBoolean("go_away_on_path_degrading", |
| params_.quic_go_away_on_path_degrading); |
| dict->SetBoolean("estimate_initial_rtt", params_.quic_estimate_initial_rtt); |
| dict->SetBoolean("force_hol_blocking", params_.quic_force_hol_blocking); |
| dict->SetBoolean("server_push_cancellation", |
| params_.enable_server_push_cancellation); |
| |
| return std::move(dict); |
| } |
| |
| void HttpNetworkSession::CloseAllConnections() { |
| normal_socket_pool_manager_->FlushSocketPoolsWithError(ERR_ABORTED); |
| websocket_socket_pool_manager_->FlushSocketPoolsWithError(ERR_ABORTED); |
| spdy_session_pool_.CloseCurrentSessions(ERR_ABORTED); |
| quic_stream_factory_.CloseAllSessions(ERR_ABORTED, quic::QUIC_INTERNAL_ERROR); |
| } |
| |
| void HttpNetworkSession::CloseIdleConnections() { |
| normal_socket_pool_manager_->CloseIdleSockets(); |
| websocket_socket_pool_manager_->CloseIdleSockets(); |
| spdy_session_pool_.CloseCurrentIdleSessions(); |
| } |
| |
| bool HttpNetworkSession::IsProtocolEnabled(NextProto protocol) const { |
| switch (protocol) { |
| case kProtoUnknown: |
| NOTREACHED(); |
| return false; |
| case kProtoHTTP11: |
| return true; |
| case kProtoHTTP2: |
| return params_.enable_http2; |
| case kProtoQUIC: |
| return IsQuicEnabled(); |
| } |
| NOTREACHED(); |
| return false; |
| } |
| |
| void HttpNetworkSession::SetServerPushDelegate( |
| std::unique_ptr<ServerPushDelegate> push_delegate) { |
| DCHECK(push_delegate); |
| if (!params_.enable_server_push_cancellation || push_delegate_) |
| return; |
| |
| push_delegate_ = std::move(push_delegate); |
| spdy_session_pool_.set_server_push_delegate(push_delegate_.get()); |
| quic_stream_factory_.set_server_push_delegate(push_delegate_.get()); |
| } |
| |
| void HttpNetworkSession::GetAlpnProtos(NextProtoVector* alpn_protos) const { |
| *alpn_protos = next_protos_; |
| } |
| |
| void HttpNetworkSession::GetSSLConfig(const HttpRequestInfo& request, |
| SSLConfig* server_config, |
| SSLConfig* proxy_config) const { |
| ssl_config_service_->GetSSLConfig(server_config); |
| GetAlpnProtos(&server_config->alpn_protos); |
| server_config->ignore_certificate_errors = params_.ignore_certificate_errors; |
| *proxy_config = *server_config; |
| if (request.privacy_mode == PRIVACY_MODE_ENABLED) { |
| server_config->channel_id_enabled = false; |
| } else { |
| server_config->channel_id_enabled = params_.enable_channel_id; |
| proxy_config->channel_id_enabled = params_.enable_channel_id; |
| } |
| } |
| |
| void HttpNetworkSession::DumpMemoryStats( |
| base::trace_event::ProcessMemoryDump* pmd, |
| const std::string& parent_absolute_name) const { |
| std::string name = base::StringPrintf("net/http_network_session_0x%" PRIxPTR, |
| reinterpret_cast<uintptr_t>(this)); |
| base::trace_event::MemoryAllocatorDump* http_network_session_dump = |
| pmd->GetAllocatorDump(name); |
| if (http_network_session_dump == nullptr) { |
| http_network_session_dump = pmd->CreateAllocatorDump(name); |
| normal_socket_pool_manager_->DumpMemoryStats( |
| pmd, http_network_session_dump->absolute_name()); |
| spdy_session_pool_.DumpMemoryStats( |
| pmd, http_network_session_dump->absolute_name()); |
| if (http_stream_factory_) { |
| http_stream_factory_->DumpMemoryStats( |
| pmd, http_network_session_dump->absolute_name()); |
| } |
| quic_stream_factory_.DumpMemoryStats( |
| pmd, http_network_session_dump->absolute_name()); |
| ssl_client_session_cache_.DumpMemoryStats(pmd, name); |
| } |
| |
| // Create an empty row under parent's dump so size can be attributed correctly |
| // if |this| is shared between URLRequestContexts. |
| base::trace_event::MemoryAllocatorDump* empty_row_dump = |
| pmd->CreateAllocatorDump(base::StringPrintf( |
| "%s/http_network_session", parent_absolute_name.c_str())); |
| pmd->AddOwnershipEdge(empty_row_dump->guid(), |
| http_network_session_dump->guid()); |
| } |
| |
| bool HttpNetworkSession::IsQuicEnabled() const { |
| return params_.enable_quic; |
| } |
| |
| void HttpNetworkSession::DisableQuic() { |
| params_.enable_quic = false; |
| } |
| |
| void HttpNetworkSession::ClearSSLSessionCache() { |
| ssl_client_session_cache_.Flush(); |
| } |
| |
| ClientSocketPoolManager* HttpNetworkSession::GetSocketPoolManager( |
| SocketPoolType pool_type) { |
| switch (pool_type) { |
| case NORMAL_SOCKET_POOL: |
| return normal_socket_pool_manager_.get(); |
| case WEBSOCKET_SOCKET_POOL: |
| return websocket_socket_pool_manager_.get(); |
| default: |
| NOTREACHED(); |
| break; |
| } |
| return NULL; |
| } |
| |
| void HttpNetworkSession::OnMemoryPressure( |
| base::MemoryPressureListener::MemoryPressureLevel memory_pressure_level) { |
| DCHECK(!params_.disable_idle_sockets_close_on_memory_pressure); |
| |
| switch (memory_pressure_level) { |
| case base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE: |
| break; |
| |
| case base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_MODERATE: |
| case base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL: |
| CloseIdleConnections(); |
| break; |
| } |
| } |
| |
| } // namespace net |
