1 // Copyright (c) 2011 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 #pragma once 8 9 #include <set> 10 #include <string> 11 #include <vector> 12 13 #include "chrome/common/net/url_fetcher.h" 14 #include "content/common/notification_observer.h" 15 #include "content/common/notification_registrar.h" 16 #include "googleurl/src/gurl.h" 17 #include "net/base/host_resolver_proc.h" 18 #include "net/base/network_change_notifier.h" 19 20 class PrefService; 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 AlternateNavURLFetcher 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 URLFetcher::Delegate, 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 ~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(PrefService* prefs); 56 57 // The number of characters the fetcher will use for its randomly-generated 58 // hostnames. 59 static const size_t kNumCharsInHostnames; 60 61 private: 62 typedef std::set<URLFetcher*> Fetchers; 63 64 // Called when the seven second startup sleep or the one second network 65 // switch sleep has finished. Runs any pending fetch. 66 void FinishSleep(); 67 68 // URLFetcher::Delegate 69 virtual void OnURLFetchComplete(const URLFetcher* source, 70 const GURL& url, 71 const net::URLRequestStatus& status, 72 int response_code, 73 const ResponseCookies& cookies, 74 const std::string& data); 75 76 // NetworkChangeNotifier::IPAddressObserver 77 virtual void OnIPAddressChanged(); 78 79 GURL redirect_origin_; 80 ScopedRunnableMethodFactory<IntranetRedirectDetector> fetcher_factory_; 81 Fetchers fetchers_; 82 std::vector<GURL> resulting_origins_; 83 bool in_sleep_; // True if we're in the seven-second "no fetching" period 84 // that begins at browser start, or the one-second "no 85 // fetching" period that begins after network switches. 86 87 DISALLOW_COPY_AND_ASSIGN(IntranetRedirectDetector); 88 }; 89 90 // This is for use in testing, where we don't want our fetches to actually go 91 // over the network. It captures the requests and causes them to fail. 92 class IntranetRedirectHostResolverProc : public net::HostResolverProc { 93 public: 94 explicit IntranetRedirectHostResolverProc(net::HostResolverProc* previous); 95 96 virtual int Resolve(const std::string& host, 97 net::AddressFamily address_family, 98 net::HostResolverFlags host_resolver_flags, 99 net::AddressList* addrlist, 100 int* os_error); 101 }; 102 103 #endif // CHROME_BROWSER_INTRANET_REDIRECT_DETECTOR_H_ 104