Cherry pick PR #3979: Add disable_h2 and matching h5vcc.settings (#3981)

Refer to the original PR: #3979 This adds a command-line switch `disable_h2` that disables the HTTP/2 protocol (spdy), and a matching `h5vcc.settings` parameter 'HTTP2' (with backing by `PersistentSettings`) for run-time disabling of HTTP/2 and spdy. Similar to 'QUIC' and 'HTTP3', the setting takes effect immediately for new connections only. This also ensures that when the command-line parameter `disable_quic` or the new `disable_h2` is used, that that can not be overuled later with `5vcc.settings` or from the corresponding `PersistentSetting`. b/205134049 Co-authored-by: Jelle Foks <[email protected]>
youtube · Aug 13, 2024 · 0fb823c · 0fb823c
1 parent 57b4e9b
commit 0fb823c
Show file tree

Hide file tree

Showing 9 changed files with 79 additions and 12 deletions.
diff --git a/cobalt/h5vcc/h5vcc_settings.cc b/cobalt/h5vcc/h5vcc_settings.cc
@@ -57,6 +57,7 @@ bool H5vccSettings::Set(const std::string& name, SetValueType value) const {
   const char kMediaCodecBlockList[] = "MediaCodecBlockList";
   const char kNavigatorUAData[] = "NavigatorUAData";
   const char kQUIC[] = "QUIC";
+  const char kHTTP2[] = "HTTP2";
   const char kHTTP3[] = "HTTP3";
   const char kSkiaRasterizer[] = "SkiaRasterizer";
 
@@ -70,11 +71,6 @@ bool H5vccSettings::Set(const std::string& name, SetValueType value) const {
     return true;
   }
 
-  if (set_web_setting_func_ && value.IsType<int32>() &&
-      set_web_setting_func_.Run(name, value.AsType<int32>())) {
-    return true;
-  }
-
   if (name.rfind(kMediaPrefix, 0) == 0 && value.IsType<int32>()) {
     return media_module_
                ? media_module_->SetConfiguration(
@@ -100,6 +96,17 @@ bool H5vccSettings::Set(const std::string& name, SetValueType value) const {
     }
   }
 
+  if (name.compare(kHTTP2) == 0 && value.IsType<int32>()) {
+    if (!persistent_settings_ || !network_module_) {
+      return false;
+    } else {
+      persistent_settings_->Set(network::kHttp2EnabledPersistentSettingsKey,
+                                base::Value(value.AsType<int32>() != 0));
+      network_module_->SetEnableHttp2FromPersistentSettings();
+      return true;
+    }
+  }
+
   if (name.compare(kHTTP3) == 0 && value.IsType<int32>()) {
     if (!persistent_settings_ || !network_module_) {
       return false;
@@ -153,6 +160,11 @@ bool H5vccSettings::Set(const std::string& name, SetValueType value) const {
     return true;
   }
 #endif
+  if (set_web_setting_func_ && value.IsType<int32>() &&
+      set_web_setting_func_.Run(name, value.AsType<int32>())) {
+    return true;
+  }
+
   return false;
 }
 

diff --git a/cobalt/network/network_module.cc b/cobalt/network/network_module.cc
@@ -120,6 +120,20 @@ void NetworkModule::SetEnableQuicFromPersistentSettings() {
   }
 }
 
+void NetworkModule::SetEnableHttp2FromPersistentSettings() {
+  // Called on initialization and when the persistent setting is changed.
+  if (options_.persistent_settings != nullptr) {
+    base::Value value;
+    options_.persistent_settings->Get(kHttp2EnabledPersistentSettingsKey,
+                                      &value);
+    bool enable_http2 = value.GetIfBool().value_or(true);
+    task_runner()->PostTask(
+        FROM_HERE,
+        base::Bind(&URLRequestContext::SetEnableHttp2,
+                   base::Unretained(url_request_context_.get()), enable_http2));
+  }
+}
+
 void NetworkModule::SetEnableHttp3FromPersistentSettings() {
   // Called on initialization and when the persistent setting is changed.
   if (options_.persistent_settings != nullptr) {
@@ -233,6 +247,7 @@ void NetworkModule::Initialize(const std::string& user_agent_string,
       url_request_context_.get(), thread_.get());
 
   SetEnableQuicFromPersistentSettings();
+  SetEnableHttp2FromPersistentSettings();
   SetEnableHttp3FromPersistentSettings();
 }
 

diff --git a/cobalt/network/network_module.h b/cobalt/network/network_module.h
@@ -59,6 +59,7 @@ enum ClientHintHeadersCallType : int32_t {
 constexpr int32_t kEnabledClientHintHeaders = (kCallTypeLoader | kCallTypeXHR);
 
 const char kQuicEnabledPersistentSettingsKey[] = "QUICEnabled";
+const char kHttp2EnabledPersistentSettingsKey[] = "HTTP2Enabled";
 const char kHttp3EnabledPersistentSettingsKey[] = "HTTP3Enabled";
 
 class NetworkSystem;
@@ -130,6 +131,7 @@ class NetworkModule : public base::CurrentThread::DestructionObserver {
   void SetProxy(const std::string& custom_proxy_rules);
 
   void SetEnableQuicFromPersistentSettings();
+  void SetEnableHttp2FromPersistentSettings();
   void SetEnableHttp3FromPersistentSettings();
 
   // Adds the Client Hint Headers to the provided URLFetcher if enabled.

diff --git a/cobalt/network/switches.cc b/cobalt/network/switches.cc
@@ -44,6 +44,9 @@ const char kDisableInAppDial[] = "disable_in_app_dial";
 // Switch to disable use of the Quic network protocol.
 const char kDisableQuic[] = "disable_quic";
 
+// Switch to disable use of the HTTP/2 (SPDY) network protocol.
+const char kDisableHttp2[] = "disable_h2";
+
 
 }  // namespace switches
 }  // namespace network

diff --git a/cobalt/network/switches.h b/cobalt/network/switches.h
@@ -28,6 +28,7 @@ extern const char kMaxNetworkDelayHelp[];
 extern const char kDisableInAppDial[];
 #endif  // ENABLE_DEBUG_COMMAND_LINE_SWITCHES
 extern const char kDisableQuic[];
+extern const char kDisableHttp2[];
 
 }  // namespace switches
 }  // namespace network

diff --git a/cobalt/network/url_request_context.cc b/cobalt/network/url_request_context.cc
@@ -209,17 +209,17 @@ URLRequestContext::URLRequestContext(
       quic::ParsedQuicVersionVector{quic::ParsedQuicVersion::Q046()};
   url_request_context_builder->set_quic_context(std::move(quic_context));
 
+  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   bool quic_enabled =
-      configuration::Configuration::GetInstance()->CobaltEnableQuic();
-  if (quic_enabled) {
-    base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
-    quic_enabled = !command_line->HasSwitch(switches::kDisableQuic);
-  }
+      configuration::Configuration::GetInstance()->CobaltEnableQuic() &&
+      !command_line->HasSwitch(switches::kDisableQuic);
+  bool spdy_enabled = !command_line->HasSwitch(switches::kDisableHttp2);
 
-  url_request_context_builder->SetSpdyAndQuicEnabled(/*spdy_enabled=*/true,
+  url_request_context_builder->SetSpdyAndQuicEnabled(spdy_enabled,
                                                      quic_enabled);
 
   net::HttpNetworkSessionParams params;
+  params.enable_http2 = spdy_enabled;
   params.enable_quic = quic_enabled;
   params.use_quic_for_unknown_origins = quic_enabled;
 
@@ -329,7 +329,20 @@ void URLRequestContext::SetProxy(const std::string& proxy_rules) {
 
 void URLRequestContext::SetEnableQuic(bool enable_quic) {
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
-  url_request_context_->http_network_session()->SetEnableQuic(enable_quic);
+  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
+  bool quic_commandline_enabled =
+      !command_line->HasSwitch(switches::kDisableQuic);
+  url_request_context_->http_network_session()->SetEnableQuic(
+      enable_quic && quic_commandline_enabled);
+}
+
+void URLRequestContext::SetEnableHttp2(bool enable_http2) {
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
+  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
+  bool http2_commandline_enabled =
+      !command_line->HasSwitch(switches::kDisableHttp2);
+  url_request_context_->http_network_session()->SetEnableHttp2(
+      enable_http2 && http2_commandline_enabled);
 }
 
 bool URLRequestContext::using_http_cache() { return using_http_cache_; }

diff --git a/cobalt/network/url_request_context.h b/cobalt/network/url_request_context.h
@@ -60,6 +60,7 @@ class URLRequestContext {
   void SetProxy(const std::string& custom_proxy_rules);
 
   void SetEnableQuic(bool enable_quic);
+  void SetEnableHttp2(bool enable_http2);
 
   bool using_http_cache();
 

diff --git a/net/http/http_network_session.cc b/net/http/http_network_session.cc
@@ -373,6 +373,25 @@ void HttpNetworkSession::DisableQuic() {
 void HttpNetworkSession::SetEnableQuic(bool enable_quic) {
   params_.enable_quic = enable_quic;
 }
+void HttpNetworkSession::SetEnableHttp2(bool enable_http2) {
+  if (params_.enable_http2 == enable_http2) {
+    return;
+  }
+  params_.enable_http2 = enable_http2;
+
+  if (params_.enable_http2) {
+    next_protos_.push_back(kProtoHTTP2);
+    if (base::FeatureList::IsEnabled(features::kAlpsForHttp2)) {
+      // Enable ALPS for HTTP/2 with empty data.
+      application_settings_[kProtoHTTP2] = {};
+    }
+  } else {
+    if (next_protos_.back() == kProtoHTTP2) {
+      next_protos_.pop_back();
+    }
+    application_settings_.erase(kProtoHTTP2);
+  }
+}
 
 bool HttpNetworkSession::UseQuicForUnknownOrigin() const {
   return params_.use_quic_for_unknown_origins;

diff --git a/net/http/http_network_session.h b/net/http/http_network_session.h
@@ -315,6 +315,7 @@ class NET_EXPORT HttpNetworkSession {
 
 #if defined(STARBOARD)
   void SetEnableQuic(bool enable_quic);
+  void SetEnableHttp2(bool enable_http2);
 
   // Whether to try QUIC connection for origins without alt-svc on record.
   bool UseQuicForUnknownOrigin() const;