| // Copyright (c) 2011 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 CHROME_BROWSER_INTRANET_REDIRECT_DETECTOR_H_ |
| #define CHROME_BROWSER_INTRANET_REDIRECT_DETECTOR_H_ |
| #pragma once |
| |
| #include <set> |
| #include <string> |
| #include <vector> |
| |
| #include "chrome/common/net/url_fetcher.h" |
| #include "content/common/notification_observer.h" |
| #include "content/common/notification_registrar.h" |
| #include "googleurl/src/gurl.h" |
| #include "net/base/host_resolver_proc.h" |
| #include "net/base/network_change_notifier.h" |
| |
| class PrefService; |
| |
| // This object is responsible for determining whether the user is on a network |
| // that redirects requests for intranet hostnames to another site, and if so, |
| // tracking what that site is (including across restarts via a pref). For |
| // example, the user's ISP might convert a request for "http://query/" into a |
| // 302 redirect to "http://isp.domain.com/search?q=query" in order to display |
| // custom pages on typos, nonexistent sites, etc. |
| // |
| // We use this information in the AlternateNavURLFetcher to avoid displaying |
| // infobars for these cases. Our infobars are designed to allow users to get at |
| // intranet sites when they were erroneously taken to a search result page. In |
| // these cases, however, users would be shown a confusing and useless infobar |
| // when they really did mean to do a search. |
| // |
| // Consumers should call RedirectOrigin(), which is guaranteed to synchronously |
| // return a value at all times (even during startup or in unittest mode). If no |
| // redirection is in place, the returned GURL will be empty. |
| class IntranetRedirectDetector |
| : public URLFetcher::Delegate, |
| public net::NetworkChangeNotifier::IPAddressObserver { |
| public: |
| // Only the main browser process loop should call this, when setting up |
| // g_browser_process->intranet_redirect_detector_. No code other than the |
| // IntranetRedirectDetector itself should actually use |
| // g_browser_process->intranet_redirect_detector() (which shouldn't be hard, |
| // since there aren't useful public functions on this object for consumers to |
| // access anyway). |
| IntranetRedirectDetector(); |
| ~IntranetRedirectDetector(); |
| |
| // Returns the current redirect origin. This will be empty if no redirection |
| // is in place. |
| static GURL RedirectOrigin(); |
| |
| static void RegisterPrefs(PrefService* prefs); |
| |
| // The number of characters the fetcher will use for its randomly-generated |
| // hostnames. |
| static const size_t kNumCharsInHostnames; |
| |
| private: |
| typedef std::set<URLFetcher*> Fetchers; |
| |
| // Called when the seven second startup sleep or the one second network |
| // switch sleep has finished. Runs any pending fetch. |
| void FinishSleep(); |
| |
| // URLFetcher::Delegate |
| virtual void OnURLFetchComplete(const URLFetcher* source, |
| const GURL& url, |
| const net::URLRequestStatus& status, |
| int response_code, |
| const ResponseCookies& cookies, |
| const std::string& data); |
| |
| // NetworkChangeNotifier::IPAddressObserver |
| virtual void OnIPAddressChanged(); |
| |
| GURL redirect_origin_; |
| ScopedRunnableMethodFactory<IntranetRedirectDetector> fetcher_factory_; |
| Fetchers fetchers_; |
| std::vector<GURL> resulting_origins_; |
| bool in_sleep_; // True if we're in the seven-second "no fetching" period |
| // that begins at browser start, or the one-second "no |
| // fetching" period that begins after network switches. |
| |
| DISALLOW_COPY_AND_ASSIGN(IntranetRedirectDetector); |
| }; |
| |
| // This is for use in testing, where we don't want our fetches to actually go |
| // over the network. It captures the requests and causes them to fail. |
| class IntranetRedirectHostResolverProc : public net::HostResolverProc { |
| public: |
| explicit IntranetRedirectHostResolverProc(net::HostResolverProc* previous); |
| |
| virtual int Resolve(const std::string& host, |
| net::AddressFamily address_family, |
| net::HostResolverFlags host_resolver_flags, |
| net::AddressList* addrlist, |
| int* os_error); |
| }; |
| |
| #endif // CHROME_BROWSER_INTRANET_REDIRECT_DETECTOR_H_ |