Port WebSockets to Mojo IPC

content/browser/websockets/websocket_manager.h

+// Copyright 2013 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_WEBSOCKETS_WEBSOCKET_MANAGER_H_
+#define CONTENT_BROWSER_WEBSOCKETS_WEBSOCKET_MANAGER_H_
+
+#include <set>
+
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "base/timer/timer.h"
+#include "content/browser/websockets/websocket_impl.h"
+#include "content/common/content_export.h"
+
+namespace content {
+class StoragePartition;
+
+// The WebSocketManager is a per child process instance that manages the
+// lifecycle of WebSocketImpl objects. It is responsible for creating
+// WebSocketImpl objects for each WebSocketRequest and throttling the number of
+// WebSocketImpl objects in use.
+class CONTENT_EXPORT WebSocketManager
+    : NON_EXPORTED_BASE(public WebSocketImpl::Delegate) {
+ public:
+  static void CreateWebSocket(int process_id, mojom::WebSocketRequest request);
+
+ protected:
+  class Handle;
+  friend class base::DeleteHelper<WebSocketManager>;
+
+  // May be constructed on any thread.
+  WebSocketManager(int process_id, StoragePartition* storage_partition);
+
+  // All other methods must run on the IO thread.
+
+  ~WebSocketManager() override;
+  void DoCreateWebSocket(mojom::WebSocketRequest request);
+  base::TimeDelta CalculateDelay() const;
+  void ThrottlingPeriodTimerCallback();
+
+  // This is virtual to support testing.
+  virtual WebSocketImpl* CreateWebSocketImpl(WebSocketImpl::Delegate* delegate,
+                                             mojom::WebSocketRequest request,
+                                             base::TimeDelta delay);
+
+  // WebSocketImpl::Delegate methods:
+  int GetClientProcessId() override;
+  StoragePartition* GetStoragePartition() override;
+  void OnReceivedResponseFromServer(WebSocketImpl* impl) override;
+  void OnLostConnectionToClient(WebSocketImpl* impl) override;
+
+  int process_id_;
+  StoragePartition* storage_partition_;
+
+  std::set<WebSocketImpl*> impls_;
+
+  // Timer and counters for per-renderer WebSocket throttling.
+  base::RepeatingTimer throttling_period_timer_;
+
+  // The current number of pending connections.
+  int num_pending_connections_;
+
+  // The number of handshakes that failed in the current and previous time
+  // period.
+  int64_t num_current_succeeded_connections_;
+  int64_t num_previous_succeeded_connections_;
+
+  // The number of handshakes that succeeded in the current and previous time
+  // period.
+  int64_t num_current_failed_connections_;
+  int64_t num_previous_failed_connections_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebSocketManager);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_WEBSOCKETS_WEBSOCKET_MANAGER_H_