1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CHROME_BROWSER_INTRANET_REDIRECT_DETECTOR_H_ 6 #define CHROME_BROWSER_INTRANET_REDIRECT_DETECTOR_H_ 7 8 #include <set> 9 #include <string> 10 #include <vector> 11 12 #include "base/memory/weak_ptr.h" 13 #include "content/public/browser/notification_observer.h" 14 #include "content/public/browser/notification_registrar.h" 15 #include "net/base/network_change_notifier.h" 16 #include "net/dns/host_resolver_proc.h" 17 #include "net/url_request/url_fetcher_delegate.h" 18 #include "url/gurl.h" 19 20 class PrefRegistrySimple; 21 22 // This object is responsible for determining whether the user is on a network 23 // that redirects requests for intranet hostnames to another site, and if so, 24 // tracking what that site is (including across restarts via a pref). For 25 // example, the user's ISP might convert a request for "http://query/" into a 26 // 302 redirect to "http://isp.domain.com/search?q=query" in order to display 27 // custom pages on typos, nonexistent sites, etc. 28 // 29 // We use this information in the OmniboxNavigationObserver to avoid displaying 30 // infobars for these cases. Our infobars are designed to allow users to get at 31 // intranet sites when they were erroneously taken to a search result page. In 32 // these cases, however, users would be shown a confusing and useless infobar 33 // when they really did mean to do a search. 34 // 35 // Consumers should call RedirectOrigin(), which is guaranteed to synchronously 36 // return a value at all times (even during startup or in unittest mode). If no 37 // redirection is in place, the returned GURL will be empty. 38 class IntranetRedirectDetector 39 : public net::URLFetcherDelegate, 40 public net::NetworkChangeNotifier::IPAddressObserver { 41 public: 42 // Only the main browser process loop should call this, when setting up 43 // g_browser_process->intranet_redirect_detector_. No code other than the 44 // IntranetRedirectDetector itself should actually use 45 // g_browser_process->intranet_redirect_detector() (which shouldn't be hard, 46 // since there aren't useful public functions on this object for consumers to 47 // access anyway). 48 IntranetRedirectDetector(); 49 virtual ~IntranetRedirectDetector(); 50 51 // Returns the current redirect origin. This will be empty if no redirection 52 // is in place. 53 static GURL RedirectOrigin(); 54 55 static void RegisterPrefs(PrefRegistrySimple* registry); 56 57 private: 58 typedef std::set<net::URLFetcher*> Fetchers; 59 60 // Called when the seven second startup sleep or the one second network 61 // switch sleep has finished. Runs any pending fetch. 62 void FinishSleep(); 63 64 // net::URLFetcherDelegate 65 virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE; 66 67 // NetworkChangeNotifier::IPAddressObserver 68 virtual void OnIPAddressChanged() OVERRIDE; 69 70 GURL redirect_origin_; 71 Fetchers fetchers_; 72 std::vector<GURL> resulting_origins_; 73 bool in_sleep_; // True if we're in the seven-second "no fetching" period 74 // that begins at browser start, or the one-second "no 75 // fetching" period that begins after network switches. 76 base::WeakPtrFactory<IntranetRedirectDetector> weak_ptr_factory_; 77 78 DISALLOW_COPY_AND_ASSIGN(IntranetRedirectDetector); 79 }; 80 81 #endif // CHROME_BROWSER_INTRANET_REDIRECT_DETECTOR_H_ 82