ios: add CrNet

ios/crnet/crnet_environment.h

+// Copyright 2014 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 IOS_CRNET_CRNET_ENVIRONMENT_H_
+#define IOS_CRNET_CRNET_ENVIRONMENT_H_
+
+#include "base/files/file_path.h"
+#include "base/message_loop/message_loop.h"
+#include "base/synchronization/waitable_event.h"
+#include "base/threading/thread.h"
+#import "ios/crnet/CrNet.h"
+#include "ios/crnet/crnet_net_log.h"
+#include "net/url_request/url_request.h"
+#include "net/url_request/url_request_context.h"
+
+namespace net {
+class HttpCache;
+class NetworkChangeNotifier;
+class ProxyConfigService;
+class SdchManager;
+class URLRequestContextGetter;
+}
+
+class CrNetHttpProtocolHandlerDelegate;
+
+// CrNetEnvironment contains all the network stack configuration
+// and initialization.
+class CrNetEnvironment {
+ public:
+  // Must be called on the main thread.
+  static void Initialize();
+
+  // |user_agent_product_name| will be used to generate the user-agent.
+  CrNetEnvironment(std::string user_agent_product_name);
+  ~CrNetEnvironment();
+
+  // Installs this CrNet environment so requests are intercepted.
+  // Can only be called once; to enable/disable CrNet at runtime, use
+  // SetHTTPProtocolHandlerRegistered.
+  void Install();
+
+  // Installs this CrNet environment into the supplied
+  // NSURLSessionConfiguration. Settings are inherited from the shared
+  // NSURLSessionConfiguration, which Install() affects.
+  void InstallIntoSessionConfiguration(NSURLSessionConfiguration* config);
+
+  // The full user-agent.
+  std::string user_agent();
+
+  // Returns the global request context getter for use in the network stack.
+  //
+  // The request context gathers all the settings needed to do an actual network
+  // request (cache type and path, cookies store, proxy setting ...).
+  // Chrome network stacks supports multiple active contexts, and this is used
+  // for example to separate Incognito data from the main profile data.
+  // CrNetEnvironment only implement one request context for now, but it can be
+  // extended in the future.
+  net::URLRequestContextGetter* GetMainContextGetter();
+
+  // Enables or disables the HTTP protocol handler.
+  //
+  // When the HTTP protocol handler is registered, it will be used for all the
+  // network requests the application does (including requests from UIWebView).
+  void SetHTTPProtocolHandlerRegistered(bool registered);
+
+  // Creates a new net log (overwrites existing file with this name). If
+  // actively logging, this call is ignored.
+  void StartNetLog(base::FilePath::StringType file_name, bool log_bytes);
+  // Stops logging and flushes file. If not currently logging this call is
+  // ignored.
+  void StopNetLog();
+  // Closes all existing SPDY sessions with ERR_ABORTED.
+  void CloseAllSpdySessions();
+
+  // Sets the block used to determine whether or not CrNet should handle the
+  // request. If this is not set, CrNet will handle all requests.
+  // Must not be called while requests are in progress.
+  void SetRequestFilterBlock(RequestFilterBlock block);
+
+  // Setters and getters for |spdy_enabled_|, |quic_enabled_|, and
+  // |forced_quic_origin_|. These only have any effect before Install() is
+  // called.
+  void set_spdy_enabled(bool enabled) { spdy_enabled_ = enabled; }
+  void set_quic_enabled(bool enabled) { quic_enabled_ = enabled; }
+  void set_alternate_protocol_threshold(double threshold) {
+    alternate_protocol_threshold_ = threshold;
+  }
+
+  bool spdy_enabled() const { return spdy_enabled_; }
+  bool quic_enabled() const { return quic_enabled_; }
+  double alternate_protocol_threshold() const {
+    return alternate_protocol_threshold_;
+  }
+
+  // Clears the network stack's disk cache.
+  void ClearCache(ClearCacheCallback callback);
+
+ private:
+  // Runs a closure on the network thread.
+  void PostToNetworkThread(const tracked_objects::Location& from_here,
+                           const base::Closure& task);
+
+  // Performs initialization tasks that must happen on the network thread.
+  void InitializeOnNetworkThread();
+
+  // Runs a closure on the file user blocking thread.
+  void PostToFileUserBlockingThread(const tracked_objects::Location& from_here,
+                                    const base::Closure& task);
+
+  // Helper methods that start/stop net-internals logging on the file
+  // user blocking thread.
+  void StartNetLogInternal(base::FilePath::StringType file_name,
+      bool log_bytes);
+  void StopNetLogInternal();
+
+  // Returns the HttpNeteworkSession object from the passed in
+  // URLRequestContext or NULL if none exists.
+  net::HttpNetworkSession* GetHttpNetworkSession(
+      net::URLRequestContext* context);
+
+  // Helper method that closes all current SPDY sessions on the network IO
+  // thread.
+  void CloseAllSpdySessionsInternal();
+
+  bool spdy_enabled_;
+  bool quic_enabled_;
+  double alternate_protocol_threshold_;
+
+  // Helper method that clears the cache on the network thread.
+  void ClearCacheOnNetworkThread(ClearCacheCallback callback);
+
+  static CrNetEnvironment* chrome_net_;
+  scoped_ptr<base::Thread> network_io_thread_;
+  scoped_ptr<base::Thread> network_cache_thread_;
+  scoped_ptr<base::Thread> file_thread_;
+  scoped_ptr<base::Thread> file_user_blocking_thread_;
+  scoped_ptr<net::SdchManager> sdch_manager_;
+  scoped_ptr<net::NetworkChangeNotifier> network_change_notifier_;
+  scoped_ptr<net::ProxyConfigService> proxy_config_service_;
+  scoped_ptr<net::HttpServerProperties> http_server_properties_;
+  scoped_refptr<net::URLRequestContextGetter> main_context_getter_;
+  scoped_ptr<net::URLRequestContext> main_context_;
+  scoped_ptr<CrNetHttpProtocolHandlerDelegate> http_protocol_handler_delegate_;
+  std::string user_agent_product_name_;
+  base::Lock net_log_lock_;
+  bool net_log_started_;
+  scoped_ptr<CrNetNetLog> net_log_;
+
+  DISALLOW_COPY_AND_ASSIGN(CrNetEnvironment);
+};
+
+#endif  // IOS_CRNET_CRNET_ENVIRONMENT_H_