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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "chrome/browser/url_fetcher.h"
class PrefService;
// This object is responsible for updating the Google URL exactly once (when
// first constructed) and tracking the currently known value, which is also
// saved to a pref.
class GoogleURLTracker : public URLFetcher::Delegate {
public:
// Only the main browser process loop should call this, when setting up
// g_browser_process->google_url_tracker_. No code other than the
// GoogleURLTracker itself should actually use
// g_browser_process->google_url_tracker() (which shouldn't be hard, since
// there aren't useful public functions on this object for consumers to access
// anyway).
GoogleURLTracker();
// This returns the current Google URL. If this is the first call to it in
// this session, it also kicks off a timer to fetch the correct Google URL;
// when that fetch completes, it will fire NOTIFY_GOOGLE_URL_UPDATED.
//
// This is the only function most code should ever call.
//
// This will return a valid URL even in unittest mode.
static GURL GoogleURL();
static void RegisterPrefs(PrefService* prefs);
private:
FRIEND_TEST(GoogleURLTrackerTest, CheckAndConvertURL);
// Determines if |url| is an appropriate source for a new Google base URL, and
// update |base_url| to the appropriate base URL if so. Returns whether the
// check succeeded (and thus whether |base_url| was actually updated).
static bool CheckAndConvertToGoogleBaseURL(const GURL& url, GURL* base_url);
// Starts the fetch of the up-to-date Google URL.
void StartFetch();
// URLFetcher::Delegate
virtual void OnURLFetchComplete(const URLFetcher *source,
const GURL& url,
const URLRequestStatus& status,
int response_code,
const ResponseCookies& cookies,
const std::string& data);
static const char kDefaultGoogleHomepage[];
GURL google_url_;
ScopedRunnableMethodFactory<GoogleURLTracker> fetcher_factory_;
scoped_ptr<URLFetcher> fetcher_;
DISALLOW_EVIL_CONSTRUCTORS(GoogleURLTracker);
};
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