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// 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.
#ifndef CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_SESSION_H_
#define CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_SESSION_H_
#include <list>
#include <map>
#include <memory>
#include <string>
#include "base/containers/flat_map.h"
#include "base/containers/span.h"
#include "base/memory/weak_ptr.h"
#include "content/browser/devtools/protocol/forward.h"
#include "content/public/browser/devtools_agent_host_client_channel.h"
#include "content/public/browser/devtools_external_agent_proxy.h"
#include "mojo/public/cpp/bindings/associated_receiver.h"
#include "mojo/public/cpp/bindings/associated_remote.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "third_party/blink/public/mojom/devtools/devtools_agent.mojom.h"
namespace content {
class DevToolsAgentHostClient;
class DevToolsAgentHostImpl;
class DevToolsExternalAgentProxyDelegate;
namespace protocol {
class DevToolsDomainHandler;
}
class DevToolsSession : public protocol::FrontendChannel,
public blink::mojom::DevToolsSessionHost,
public DevToolsExternalAgentProxy,
public content::DevToolsAgentHostClientChannel {
public:
DevToolsSession(DevToolsAgentHostClient* client,
const std::string& session_id);
~DevToolsSession() override;
void SetAgentHost(DevToolsAgentHostImpl* agent_host);
void SetRuntimeResumeCallback(base::OnceClosure runtime_resume);
bool IsWaitingForDebuggerOnStart() const;
void Dispose();
// content::DevToolsAgentHostClientChannel implementation.
content::DevToolsAgentHost* GetAgentHost() override;
content::DevToolsAgentHostClient* GetClient() override;
DevToolsSession* GetRootSession();
// Browser-only sessions do not talk to mojom::DevToolsAgent, but instead
// handle all protocol messages locally in the browser process.
void SetBrowserOnly(bool browser_only);
void AddHandler(std::unique_ptr<protocol::DevToolsDomainHandler> handler);
void TurnIntoExternalProxy(DevToolsExternalAgentProxyDelegate* delegate);
void AttachToAgent(blink::mojom::DevToolsAgent* agent,
bool force_using_io_session);
void DispatchProtocolMessage(base::span<const uint8_t> message);
void SuspendSendingMessagesToAgent();
void ResumeSendingMessagesToAgent();
void ClearPendingMessages(bool did_crash);
using HandlersMap =
base::flat_map<std::string,
std::unique_ptr<protocol::DevToolsDomainHandler>>;
HandlersMap& handlers() { return handlers_; }
DevToolsSession* AttachChildSession(const std::string& session_id,
DevToolsAgentHostImpl* agent_host,
DevToolsAgentHostClient* client);
void DetachChildSession(const std::string& session_id);
bool HasChildSession(const std::string& session_id);
private:
struct PendingMessage {
int call_id;
std::string method;
std::vector<uint8_t> payload;
PendingMessage() = delete;
PendingMessage(const PendingMessage&) = delete;
PendingMessage& operator=(const PendingMessage&) = delete;
PendingMessage(PendingMessage&&);
PendingMessage(int call_id,
crdtp::span<uint8_t> method,
crdtp::span<uint8_t> payload);
~PendingMessage();
};
void MojoConnectionDestroyed();
void DispatchToAgent(const PendingMessage& message);
void HandleCommand(base::span<const uint8_t> message);
void HandleCommandInternal(crdtp::Dispatchable dispatchable,
base::span<const uint8_t> message);
void DispatchProtocolMessageInternal(crdtp::Dispatchable dispatchable,
base::span<const uint8_t> message);
// protocol::FrontendChannel implementation.
void SendProtocolResponse(
int call_id,
std::unique_ptr<protocol::Serializable> message) override;
void SendProtocolNotification(
std::unique_ptr<protocol::Serializable> message) override;
void FlushProtocolNotifications() override;
void FallThrough(int call_id,
crdtp::span<uint8_t> method,
crdtp::span<uint8_t> message) override;
// content::DevToolsAgentHostClientChannel implementation.
void DispatchProtocolMessageToClient(std::vector<uint8_t> message) override;
// blink::mojom::DevToolsSessionHost implementation.
void DispatchProtocolResponse(
blink::mojom::DevToolsMessagePtr message,
int call_id,
blink::mojom::DevToolsSessionStatePtr updates) override;
void DispatchProtocolNotification(
blink::mojom::DevToolsMessagePtr message,
blink::mojom::DevToolsSessionStatePtr updates) override;
// DevToolsExternalAgentProxy implementation.
void DispatchOnClientHost(base::span<const uint8_t> message) override;
void ConnectionClosed() override;
// Merges the |updates| received from the renderer into session_state_cookie_.
void ApplySessionStateUpdates(blink::mojom::DevToolsSessionStatePtr updates);
mojo::AssociatedReceiver<blink::mojom::DevToolsSessionHost> receiver_{this};
mojo::AssociatedRemote<blink::mojom::DevToolsSession> session_;
mojo::Remote<blink::mojom::DevToolsSession> io_session_;
bool use_io_session_{false};
DevToolsAgentHostImpl* agent_host_ = nullptr;
DevToolsAgentHostClient* client_;
bool browser_only_ = false;
HandlersMap handlers_;
std::unique_ptr<protocol::UberDispatcher> dispatcher_;
bool suspended_sending_messages_to_agent_ = false;
// Messages that were sent to the agent or queued after suspending.
std::list<PendingMessage> pending_messages_;
// Pending messages that were sent and are thus waiting for a response.
base::flat_map<int, std::list<PendingMessage>::iterator>
waiting_for_response_;
// |session_state_cookie_| always corresponds to a state before
// any of the waiting for response messages have been handled.
// |session_state_cookie_| is nullptr before first attach.
blink::mojom::DevToolsSessionStatePtr session_state_cookie_;
DevToolsSession* root_session_ = nullptr;
std::string session_id_; // empty if this is the root session.
base::flat_map<std::string, DevToolsSession*> child_sessions_;
base::OnceClosure runtime_resume_;
DevToolsExternalAgentProxyDelegate* proxy_delegate_ = nullptr;
base::WeakPtrFactory<DevToolsSession> weak_factory_{this};
};
} // namespace content
#endif // CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_SESSION_H_
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