blob: 42b8ab7e7a297756ec0d53a30f71f54847648666 [file] [log] [blame]
// Copyright 2017 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 "ios/components/io_thread/ios_io_thread.h"
#include <stddef.h>
#include <utility>
#include <vector>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/command_line.h"
#include "base/compiler_specific.h"
#include "base/debug/leak_tracker.h"
#include "base/environment.h"
#include "base/logging.h"
#include "base/macros.h"
#include "base/metrics/field_trial.h"
#include "base/single_thread_task_runner.h"
#include "base/stl_util.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/task/post_task.h"
#include "base/threading/thread.h"
#include "base/time/time.h"
#include "base/trace_event/trace_event.h"
#include "components/network_session_configurator/browser/network_session_configurator.h"
#include "components/prefs/pref_service.h"
#include "components/proxy_config/ios/proxy_service_factory.h"
#include "components/proxy_config/pref_proxy_config_tracker.h"
#include "components/variations/variations_associated_data.h"
#include "components/version_info/version_info.h"
#include "ios/web/public/user_agent.h"
#include "ios/web/public/web_client.h"
#include "ios/web/public/web_task_traits.h"
#include "ios/web/public/web_thread.h"
#include "net/base/logging_network_change_observer.h"
#include "net/cert/cert_verifier.h"
#include "net/cert/ct_policy_enforcer.h"
#include "net/cert/ct_verifier.h"
#include "net/cert/multi_log_ct_verifier.h"
#include "net/cert/multi_threaded_cert_verifier.h"
#include "net/cookies/cookie_monster.h"
#include "net/cookies/cookie_store.h"
#include "net/dns/host_cache.h"
#include "net/dns/host_resolver.h"
#include "net/http/http_auth_filter.h"
#include "net/http/http_auth_handler_factory.h"
#include "net/http/http_auth_preferences.h"
#include "net/http/http_network_layer.h"
#include "net/http/http_server_properties_impl.h"
#include "net/log/net_log.h"
#include "net/log/net_log_event_type.h"
#include "net/proxy_resolution/pac_file_fetcher_impl.h"
#include "net/proxy_resolution/proxy_config_service.h"
#include "net/proxy_resolution/proxy_resolution_service.h"
#include "net/socket/tcp_client_socket.h"
#include "net/spdy/spdy_session.h"
#include "net/ssl/channel_id_service.h"
#include "net/ssl/default_channel_id_store.h"
#include "net/ssl/ssl_config_service_defaults.h"
#include "net/url_request/data_protocol_handler.h"
#include "net/url_request/file_protocol_handler.h"
#include "net/url_request/static_http_user_agent_settings.h"
#include "net/url_request/url_request_context.h"
#include "net/url_request/url_request_context_builder.h"
#include "net/url_request/url_request_context_getter.h"
#include "net/url_request/url_request_job_factory_impl.h"
#include "url/url_constants.h"
#if !defined(__has_feature) || !__has_feature(objc_arc)
#error "This file requires ARC support."
#endif
// The IOSIOThread object must outlive any tasks posted to the IO thread
// before the Quit task, so base::Bind() calls are not refcounted.
namespace io_thread {
namespace {
const char kSupportedAuthSchemes[] = "basic,digest,ntlm";
} // namespace
// Used for the "system" URLRequestContext.
class SystemURLRequestContext : public net::URLRequestContext {
public:
SystemURLRequestContext() = default;
private:
~SystemURLRequestContext() override { AssertNoURLRequests(); }
};
std::unique_ptr<net::HostResolver> CreateGlobalHostResolver(
net::NetLog* net_log) {
TRACE_EVENT0("startup", "IOSIOThread::CreateGlobalHostResolver");
// TODO(crbug.com/934402): Use a shared HostResolverManager instead of a
// single global HostResolver for iOS.
std::unique_ptr<net::HostResolver> global_host_resolver =
net::HostResolver::CreateStandaloneResolver(net_log);
return global_host_resolver;
}
class SystemURLRequestContextGetter : public net::URLRequestContextGetter {
public:
explicit SystemURLRequestContextGetter(IOSIOThread* io_thread);
// Implementation for net::UrlRequestContextGetter.
net::URLRequestContext* GetURLRequestContext() override;
scoped_refptr<base::SingleThreadTaskRunner> GetNetworkTaskRunner()
const override;
// Tells the getter that the URLRequestContext is about to be shut down.
void Shutdown();
protected:
~SystemURLRequestContextGetter() override;
private:
IOSIOThread* io_thread_; // Weak pointer, owned by ApplicationContext.
scoped_refptr<base::SingleThreadTaskRunner> network_task_runner_;
base::debug::LeakTracker<SystemURLRequestContextGetter> leak_tracker_;
};
SystemURLRequestContextGetter::SystemURLRequestContextGetter(
IOSIOThread* io_thread)
: io_thread_(io_thread),
network_task_runner_(
base::CreateSingleThreadTaskRunnerWithTraits({web::WebThread::IO})) {}
SystemURLRequestContextGetter::~SystemURLRequestContextGetter() {}
net::URLRequestContext* SystemURLRequestContextGetter::GetURLRequestContext() {
DCHECK_CURRENTLY_ON(web::WebThread::IO);
if (!io_thread_)
return nullptr;
DCHECK(io_thread_->globals()->system_request_context.get());
return io_thread_->globals()->system_request_context.get();
}
scoped_refptr<base::SingleThreadTaskRunner>
SystemURLRequestContextGetter::GetNetworkTaskRunner() const {
return network_task_runner_;
}
void SystemURLRequestContextGetter::Shutdown() {
DCHECK_CURRENTLY_ON(web::WebThread::IO);
io_thread_ = nullptr;
NotifyContextShuttingDown();
}
IOSIOThread::Globals::SystemRequestContextLeakChecker::
SystemRequestContextLeakChecker(Globals* globals)
: globals_(globals) {
DCHECK(globals_);
}
IOSIOThread::Globals::SystemRequestContextLeakChecker::
~SystemRequestContextLeakChecker() {
if (globals_->system_request_context.get())
globals_->system_request_context->AssertNoURLRequests();
}
IOSIOThread::Globals::Globals() : system_request_context_leak_checker(this) {}
IOSIOThread::Globals::~Globals() {}
// |local_state| is passed in explicitly in order to (1) reduce implicit
// dependencies and (2) make IOSIOThread more flexible for testing.
IOSIOThread::IOSIOThread(PrefService* local_state, net::NetLog* net_log)
: net_log_(net_log), globals_(nullptr), weak_factory_(this) {
pref_proxy_config_tracker_ =
ProxyServiceFactory::CreatePrefProxyConfigTrackerOfLocalState(
local_state);
system_proxy_config_service_ = ProxyServiceFactory::CreateProxyConfigService(
pref_proxy_config_tracker_.get());
web::WebThread::SetIOThreadDelegate(this);
}
IOSIOThread::~IOSIOThread() {
// This isn't needed for production code, but in tests, IOSIOThread may
// be multiply constructed.
web::WebThread::SetIOThreadDelegate(nullptr);
pref_proxy_config_tracker_->DetachFromPrefService();
DCHECK(!globals_);
}
IOSIOThread::Globals* IOSIOThread::globals() {
DCHECK_CURRENTLY_ON(web::WebThread::IO);
return globals_;
}
void IOSIOThread::SetGlobalsForTesting(Globals* globals) {
DCHECK_CURRENTLY_ON(web::WebThread::IO);
DCHECK(!globals || !globals_);
globals_ = globals;
}
net::NetLog* IOSIOThread::net_log() {
return net_log_;
}
void IOSIOThread::ChangedToOnTheRecord() {
DCHECK_CURRENTLY_ON(web::WebThread::UI);
base::PostTaskWithTraits(
FROM_HERE, {web::WebThread::IO},
base::BindOnce(&IOSIOThread::ChangedToOnTheRecordOnIOThread,
base::Unretained(this)));
}
net::URLRequestContextGetter* IOSIOThread::system_url_request_context_getter() {
DCHECK_CURRENTLY_ON(web::WebThread::UI);
if (!system_url_request_context_getter_.get()) {
// If we're in unit_tests, IOSIOThread may not be run.
if (!web::WebThread::IsThreadInitialized(web::WebThread::IO))
return nullptr;
system_url_request_context_getter_ =
new SystemURLRequestContextGetter(this);
}
return system_url_request_context_getter_.get();
}
void IOSIOThread::Init() {
TRACE_EVENT0("startup", "IOSIOThread::Init");
DCHECK_CURRENTLY_ON(web::WebThread::IO);
DCHECK(!globals_);
globals_ = new Globals;
// Add an observer that will emit network change events to the NetLog.
// Assuming NetworkChangeNotifier dispatches in FIFO order, we should be
// logging the network change before other IO thread consumers respond to it.
network_change_observer_ =
std::make_unique<net::LoggingNetworkChangeObserver>(net_log_);
globals_->system_network_delegate = CreateSystemNetworkDelegate();
globals_->host_resolver = CreateGlobalHostResolver(net_log_);
globals_->cert_verifier = net::CertVerifier::CreateDefault();
globals_->transport_security_state.reset(new net::TransportSecurityState());
globals_->cert_transparency_verifier.reset(new net::MultiLogCTVerifier());
globals_->ct_policy_enforcer.reset(new net::DefaultCTPolicyEnforcer());
globals_->ssl_config_service.reset(new net::SSLConfigServiceDefaults());
CreateDefaultAuthHandlerFactory();
globals_->http_server_properties.reset(new net::HttpServerPropertiesImpl());
// In-memory cookie store.
// TODO(crbug.com/801910): Hook up logging by passing in a non-null netlog.
globals_->system_cookie_store.reset(
new net::CookieMonster(nullptr /* store */, nullptr /* netlog */));
// In-memory channel ID store.
globals_->http_user_agent_settings.reset(new net::StaticHttpUserAgentSettings(
std::string(),
web::GetWebClient()->GetUserAgent(web::UserAgentType::MOBILE)));
params_.ignore_certificate_errors = false;
params_.enable_user_alternate_protocol_ports = false;
std::string quic_user_agent_id = GetChannelString();
if (!quic_user_agent_id.empty())
quic_user_agent_id.push_back(' ');
quic_user_agent_id.append(
version_info::GetProductNameAndVersionForUserAgent());
quic_user_agent_id.push_back(' ');
quic_user_agent_id.append(web::BuildOSCpuInfo());
// Set up field trials, ignoring debug command line options.
network_session_configurator::ParseCommandLineAndFieldTrials(
base::CommandLine(base::CommandLine::NO_PROGRAM),
/*is_quic_force_disabled=*/false, quic_user_agent_id, &params_);
globals_->system_proxy_resolution_service =
ProxyServiceFactory::CreateProxyResolutionService(
net_log_, nullptr, globals_->system_network_delegate.get(),
std::move(system_proxy_config_service_),
true /* quick_check_enabled */);
globals_->system_request_context.reset(
ConstructSystemRequestContext(globals_, params_, net_log_));
}
void IOSIOThread::CleanUp() {
system_url_request_context_getter_->Shutdown();
system_url_request_context_getter_ = nullptr;
// Release objects that the net::URLRequestContext could have been pointing
// to.
// This must be reset before the NetLog is destroyed.
network_change_observer_.reset();
system_proxy_config_service_.reset();
delete globals_;
globals_ = nullptr;
base::debug::LeakTracker<SystemURLRequestContextGetter>::CheckForLeaks();
}
void IOSIOThread::CreateDefaultAuthHandlerFactory() {
std::vector<std::string> supported_schemes =
base::SplitString(kSupportedAuthSchemes, ",", base::TRIM_WHITESPACE,
base::SPLIT_WANT_NONEMPTY);
globals_->http_auth_preferences =
std::make_unique<net::HttpAuthPreferences>();
globals_->http_auth_handler_factory =
net::HttpAuthHandlerRegistryFactory::Create(
globals_->http_auth_preferences.get(), supported_schemes);
}
void IOSIOThread::ClearHostCache() {
DCHECK_CURRENTLY_ON(web::WebThread::IO);
net::HostCache* host_cache = globals_->host_resolver->GetHostCache();
if (host_cache)
host_cache->clear();
}
const net::HttpNetworkSession::Params& IOSIOThread::NetworkSessionParams()
const {
return params_;
}
void IOSIOThread::ChangedToOnTheRecordOnIOThread() {
DCHECK_CURRENTLY_ON(web::WebThread::IO);
// Clear the host cache to avoid showing entries from the OTR session
// in about:net-internals.
ClearHostCache();
}
net::URLRequestContext* IOSIOThread::ConstructSystemRequestContext(
IOSIOThread::Globals* globals,
const net::HttpNetworkSession::Params& params,
net::NetLog* net_log) {
net::URLRequestContext* context = new SystemURLRequestContext;
context->set_net_log(net_log);
context->set_host_resolver(globals->host_resolver.get());
context->set_cert_verifier(globals->cert_verifier.get());
context->set_transport_security_state(
globals->transport_security_state.get());
context->set_cert_transparency_verifier(
globals->cert_transparency_verifier.get());
context->set_ssl_config_service(globals->ssl_config_service.get());
context->set_http_auth_handler_factory(
globals->http_auth_handler_factory.get());
context->set_proxy_resolution_service(
globals->system_proxy_resolution_service.get());
context->set_ct_policy_enforcer(globals->ct_policy_enforcer.get());
net::URLRequestJobFactoryImpl* system_job_factory =
new net::URLRequestJobFactoryImpl();
// Data URLs are always loaded through the system request context on iOS
// (due to UIWebView limitations).
bool set_protocol = system_job_factory->SetProtocolHandler(
url::kDataScheme, std::make_unique<net::DataProtocolHandler>());
DCHECK(set_protocol);
globals->system_url_request_job_factory.reset(system_job_factory);
context->set_job_factory(globals->system_url_request_job_factory.get());
context->set_cookie_store(globals->system_cookie_store.get());
context->set_network_delegate(globals->system_network_delegate.get());
context->set_http_user_agent_settings(
globals->http_user_agent_settings.get());
context->set_http_server_properties(globals->http_server_properties.get());
net::HttpNetworkSession::Context system_context;
net::URLRequestContextBuilder::SetHttpNetworkSessionComponents(
context, &system_context);
globals->system_http_network_session.reset(
new net::HttpNetworkSession(params, system_context));
globals->system_http_transaction_factory.reset(
new net::HttpNetworkLayer(globals->system_http_network_session.get()));
context->set_http_transaction_factory(
globals->system_http_transaction_factory.get());
return context;
}
} // namespace io_thread