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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/devtools/chrome_devtools_session.h"
#include <memory>
#include <string_view>
#include <type_traits>
#include "base/command_line.h"
#include "base/metrics/histogram_functions.h"
#include "base/metrics/metrics_hashes.h"
#include "base/strings/string_number_conversions.h"
#include "build/build_config.h"
#include "chrome/browser/browser_features.h"
#include "chrome/browser/devtools/protocol/autofill_handler.h"
#include "chrome/browser/devtools/protocol/browser_handler.h"
#include "chrome/browser/devtools/protocol/cast_handler.h"
#include "chrome/browser/devtools/protocol/emulation_handler.h"
#include "chrome/browser/devtools/protocol/extensions_handler.h"
#include "chrome/browser/devtools/protocol/page_handler.h"
#include "chrome/browser/devtools/protocol/pwa_handler.h"
#include "chrome/browser/devtools/protocol/security_handler.h"
#include "chrome/browser/devtools/protocol/storage_handler.h"
#include "chrome/browser/devtools/protocol/system_info_handler.h"
#include "chrome/browser/devtools/protocol/target_handler.h"
#include "chrome/common/chrome_switches.h"
#include "content/public/browser/devtools_agent_host.h"
#include "content/public/browser/devtools_agent_host_client.h"
#include "content/public/browser/devtools_agent_host_client_channel.h"
#include "content/public/browser/devtools_manager_delegate.h"
#include "third_party/inspector_protocol/crdtp/dispatch.h"
#if BUILDFLAG(IS_CHROMEOS)
#include "chrome/browser/devtools/protocol/window_manager_handler.h"
#endif
namespace {
template <typename Handler>
bool IsDomainAvailableToUntrustedClient() {
return std::disjunction_v<std::is_same<Handler, PageHandler>,
std::is_same<Handler, EmulationHandler>,
std::is_same<Handler, TargetHandler>>;
}
} // namespace
ChromeDevToolsSession::ChromeDevToolsSession(
content::DevToolsAgentHostClientChannel* channel)
: dispatcher_(this), client_channel_(channel) {
content::DevToolsAgentHost* agent_host = channel->GetAgentHost();
if (agent_host->GetWebContents() &&
agent_host->GetType() == content::DevToolsAgentHost::kTypePage) {
if (IsDomainAvailableToUntrustedClient<PageHandler>() ||
channel->GetClient()->IsTrusted()) {
page_handler_ = std::make_unique<PageHandler>(
agent_host, agent_host->GetWebContents(), &dispatcher_);
}
if (IsDomainAvailableToUntrustedClient<SecurityHandler>() ||
channel->GetClient()->IsTrusted()) {
security_handler_ = std::make_unique<SecurityHandler>(
agent_host->GetWebContents(), &dispatcher_);
}
if (IsDomainAvailableToUntrustedClient<CastHandler>() ||
channel->GetClient()->IsTrusted()) {
cast_handler_ = std::make_unique<CastHandler>(
agent_host->GetWebContents(), &dispatcher_);
}
if (IsDomainAvailableToUntrustedClient<StorageHandler>() ||
channel->GetClient()->IsTrusted()) {
storage_handler_ = std::make_unique<StorageHandler>(
agent_host->GetWebContents(), &dispatcher_);
}
}
if (agent_host->GetWebContents() &&
(agent_host->GetType() == content::DevToolsAgentHost::kTypePage ||
agent_host->GetType() == content::DevToolsAgentHost::kTypeFrame)) {
if (IsDomainAvailableToUntrustedClient<AutofillHandler>() ||
channel->GetClient()->IsTrusted()) {
autofill_handler_ =
std::make_unique<AutofillHandler>(&dispatcher_, agent_host->GetId());
}
}
if (IsDomainAvailableToUntrustedClient<ExtensionsHandler>() ||
channel->GetClient()->IsTrusted()) {
extensions_handler_ = std::make_unique<ExtensionsHandler>(
&dispatcher_, agent_host->GetId(),
channel->GetClient()->AllowUnsafeOperations() &&
base::CommandLine::ForCurrentProcess()->HasSwitch(
::switches::kEnableUnsafeExtensionDebugging) &&
agent_host->GetType() == content::DevToolsAgentHost::kTypeBrowser);
}
if (IsDomainAvailableToUntrustedClient<EmulationHandler>() ||
channel->GetClient()->IsTrusted()) {
emulation_handler_ =
std::make_unique<EmulationHandler>(agent_host, &dispatcher_);
}
if (IsDomainAvailableToUntrustedClient<TargetHandler>() ||
channel->GetClient()->IsTrusted()) {
target_handler_ = std::make_unique<TargetHandler>(
&dispatcher_, channel->GetClient()->IsTrusted(),
channel->GetClient()->MayReadLocalFiles());
}
if (IsDomainAvailableToUntrustedClient<BrowserHandler>() ||
channel->GetClient()->IsTrusted()) {
browser_handler_ =
std::make_unique<BrowserHandler>(&dispatcher_, agent_host->GetId());
}
if (IsDomainAvailableToUntrustedClient<SystemInfoHandler>() ||
channel->GetClient()->IsTrusted()) {
system_info_handler_ = std::make_unique<SystemInfoHandler>(&dispatcher_);
}
if ((agent_host->GetType() == content::DevToolsAgentHost::kTypeBrowser ||
agent_host->GetType() == content::DevToolsAgentHost::kTypePage) &&
channel->GetClient()->AllowUnsafeOperations()) {
if (IsDomainAvailableToUntrustedClient<PWAHandler>() ||
channel->GetClient()->IsTrusted()) {
pwa_handler_ =
std::make_unique<PWAHandler>(&dispatcher_, agent_host->GetId());
}
}
#if BUILDFLAG(IS_CHROMEOS)
window_manager_handler_ =
std::make_unique<WindowManagerHandler>(&dispatcher_);
#endif
}
ChromeDevToolsSession::~ChromeDevToolsSession() = default;
base::HistogramBase::Sample32 GetCommandUmaId(std::string_view command_name) {
return static_cast<base::HistogramBase::Sample32>(
base::HashMetricName(command_name));
}
void ChromeDevToolsSession::HandleCommand(
base::span<const uint8_t> message,
content::DevToolsManagerDelegate::NotHandledCallback callback) {
crdtp::Dispatchable dispatchable(crdtp::SpanFrom(message));
DCHECK(dispatchable.ok()); // Checked by content::DevToolsSession.
crdtp::UberDispatcher::DispatchResult dispatched =
dispatcher_.Dispatch(dispatchable);
auto command_uma_id = GetCommandUmaId(std::string_view(
reinterpret_cast<const char*>(dispatchable.Method().data()),
dispatchable.Method().size()));
std::string client_type = client_channel_->GetClient()->GetTypeForMetrics();
DCHECK(client_type == "DevTools" || client_type == "Extension" ||
client_type == "RemoteDebugger" || client_type == "Other");
base::UmaHistogramSparse("DevTools.CDPCommandFrom" + client_type,
command_uma_id);
if (!dispatched.MethodFound()) {
std::move(callback).Run(message);
return;
}
pending_commands_[dispatchable.CallId()] = std::move(callback);
dispatched.Run();
}
// The following methods handle responses or notifications coming from
// the browser to the client.
void ChromeDevToolsSession::SendProtocolResponse(
int call_id,
std::unique_ptr<protocol::Serializable> message) {
pending_commands_.erase(call_id);
client_channel_->DispatchProtocolMessageToClient(message->Serialize());
}
void ChromeDevToolsSession::SendProtocolNotification(
std::unique_ptr<protocol::Serializable> message) {
client_channel_->DispatchProtocolMessageToClient(message->Serialize());
}
void ChromeDevToolsSession::FlushProtocolNotifications() {}
void ChromeDevToolsSession::FallThrough(int call_id,
crdtp::span<uint8_t> method,
crdtp::span<uint8_t> message) {
auto callback = std::move(pending_commands_[call_id]);
pending_commands_.erase(call_id);
std::move(callback).Run(message);
}
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