[iOS] Upstream //ios/net

ios/net/request_tracker.mm

+// Copyright 2012 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.
+
+#include "ios/net/request_tracker.h"
+
+#include "base/logging.h"
+#import "ios/net/clients/crn_forwarding_network_client.h"
+#import "ios/net/clients/crn_forwarding_network_client_factory.h"
+
+namespace net {
+
+namespace {
+
+// Reference to the single instance of the RequestTrackerFactory.
+RequestTracker::RequestTrackerFactory* g_request_tracker_factory = nullptr;
+
+// Array of network client factories that should be added to any new request
+// tracker.
+class GlobalNetworkClientFactories {
+ public:
+  static GlobalNetworkClientFactories* GetInstance() {
+    if (!g_global_network_client_factories)
+      g_global_network_client_factories = new GlobalNetworkClientFactories;
+    return g_global_network_client_factories;
+  }
+
+  // Gets the factories.
+  NSArray* GetFactories() {
+    DCHECK(thread_checker_.CalledOnValidThread());
+    return factories_.get();
+  }
+
+  // Adds a factory.
+  void AddFactory(CRNForwardingNetworkClientFactory* factory) {
+    DCHECK(thread_checker_.CalledOnValidThread());
+    DCHECK_EQ(NSNotFound, [factories_ indexOfObject:factory]);
+    DCHECK(!IsSelectorOverriden(factory, @selector(clientHandlingRequest:)));
+    DCHECK(!IsSelectorOverriden(factory,
+                                @selector(clientHandlingResponse:request:)));
+    DCHECK(!IsSelectorOverriden(
+               factory, @selector(clientHandlingRedirect:url:response:)));
+    [factories_ addObject:factory];
+  }
+
+  // Returns true if |factory| re-implements |selector|.
+  // Only used for debugging.
+  bool IsSelectorOverriden(CRNForwardingNetworkClientFactory* factory,
+                           SEL selector) {
+    return
+        [factory methodForSelector:selector] !=
+        [CRNForwardingNetworkClientFactory instanceMethodForSelector:selector];
+  }
+
+ private:
+  GlobalNetworkClientFactories() : factories_([[NSMutableArray alloc] init]) {}
+
+  base::scoped_nsobject<NSMutableArray> factories_;
+  base::ThreadChecker thread_checker_;
+
+  static GlobalNetworkClientFactories* g_global_network_client_factories;
+};
+
+GlobalNetworkClientFactories*
+    GlobalNetworkClientFactories::g_global_network_client_factories = nullptr;
+
+}  // namespace
+
+// static
+void RequestTracker::SetRequestTrackerFactory(RequestTrackerFactory* factory) {
+  g_request_tracker_factory = factory;
+}
+
+// static
+bool RequestTracker::GetRequestTracker(NSURLRequest* request,
+                                       base::WeakPtr<RequestTracker>* tracker) {
+  DCHECK(request);
+  DCHECK(tracker);
+  DCHECK(!tracker->get());
+  if (!g_request_tracker_factory) {
+    return true;
+  }
+  return g_request_tracker_factory->GetRequestTracker(request, tracker);
+}
+
+void RequestTracker::AddNetworkClientFactory(
+    CRNForwardingNetworkClientFactory* factory) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK([[factory clientClass]
+      isSubclassOfClass:[CRNForwardingNetworkClient class]]);
+  // Sanity check: We don't already have a factory of the type being added.
+  DCHECK([client_factories_ indexOfObjectPassingTest:^BOOL(id obj,
+                                                           NSUInteger idx,
+                                                           BOOL* stop) {
+      return [obj clientClass] == [factory clientClass];
+  }] == NSNotFound);
+  [client_factories_ addObject:factory];
+  if ([factory requiresOrdering]) {
+    [client_factories_ sortUsingSelector:@selector(orderRelativeTo:)];
+  }
+}
+
+// static
+void RequestTracker::AddGlobalNetworkClientFactory(
+    CRNForwardingNetworkClientFactory* factory) {
+  GlobalNetworkClientFactories::GetInstance()->AddFactory(factory);
+}
+
+RequestTracker::RequestTracker()
+    : client_factories_([[NSMutableArray alloc] init]),
+      initialized_(false),
+      cache_mode_(CACHE_NORMAL),
+      weak_ptr_factory_(this) {
+  // RequestTracker can be created from the main thread and used from another
+  // thread.
+  thread_checker_.DetachFromThread();
+}
+
+RequestTracker::~RequestTracker() {
+}
+
+base::WeakPtr<RequestTracker> RequestTracker::GetWeakPtr() {
+  return weak_ptr_factory_.GetWeakPtr();
+}
+
+void RequestTracker::InvalidateWeakPtrs() {
+  weak_ptr_factory_.InvalidateWeakPtrs();
+}
+
+void RequestTracker::Init() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK(!initialized_);
+  initialized_ = true;
+  for (CRNForwardingNetworkClientFactory* factory in
+           GlobalNetworkClientFactories::GetInstance()->GetFactories()) {
+    AddNetworkClientFactory(factory);
+  }
+}
+
+// static
+NSArray* RequestTracker::GlobalClientsHandlingAnyRequest() {
+  NSMutableArray* applicable_clients = [NSMutableArray array];
+  for (CRNForwardingNetworkClientFactory* factory in
+           GlobalNetworkClientFactories::GetInstance()->GetFactories()) {
+    CRNForwardingNetworkClient* client = [factory clientHandlingAnyRequest];
+    if (client)
+      [applicable_clients addObject:client];
+  }
+  return applicable_clients;
+}
+
+NSArray* RequestTracker::ClientsHandlingAnyRequest() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK(initialized_);
+  NSMutableArray* applicable_clients = [NSMutableArray array];
+  for (CRNForwardingNetworkClientFactory* factory in client_factories_.get()) {
+    CRNForwardingNetworkClient* client = [factory clientHandlingAnyRequest];
+    if (client)
+      [applicable_clients addObject:client];
+  }
+  return applicable_clients;
+}
+
+NSArray* RequestTracker::ClientsHandlingRequest(const URLRequest& request) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK(initialized_);
+  NSMutableArray* applicable_clients = [NSMutableArray array];
+  for (CRNForwardingNetworkClientFactory* factory in client_factories_.get()) {
+    CRNForwardingNetworkClient* client =
+        [factory clientHandlingRequest:request];
+    if (client)
+      [applicable_clients addObject:client];
+  }
+  return applicable_clients;
+}
+
+NSArray* RequestTracker::ClientsHandlingRequestAndResponse(
+    const URLRequest& request,
+    NSURLResponse* response) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK(initialized_);
+  NSMutableArray* applicable_clients = [NSMutableArray array];
+  for (CRNForwardingNetworkClientFactory* factory in client_factories_.get()) {
+    CRNForwardingNetworkClient* client =
+        [factory clientHandlingResponse:response request:request];
+    if (client)
+      [applicable_clients addObject:client];
+  }
+  return applicable_clients;
+}
+
+NSArray* RequestTracker::ClientsHandlingRedirect(
+    const URLRequest& request,
+    const GURL& new_url,
+    NSURLResponse* redirect_response) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK(initialized_);
+  NSMutableArray* applicable_clients = [NSMutableArray array];
+  for (CRNForwardingNetworkClientFactory* factory in client_factories_.get()) {
+    CRNForwardingNetworkClient* client =
+        [factory clientHandlingRedirect:request
+                                    url:new_url
+                               response:redirect_response];
+    if (client)
+      [applicable_clients addObject:client];
+  }
+  return applicable_clients;
+}
+
+RequestTracker::CacheMode RequestTracker::GetCacheMode() const {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  return cache_mode_;
+}
+
+void RequestTracker::SetCacheMode(RequestTracker::CacheMode mode) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  cache_mode_ = mode;
+}
+
+}  // namespace net