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// Copyright 2012 The Chromium Authors
// 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_
#include <map>
#include <memory>
#include <string>
#include <vector>
#include "base/memory/weak_ptr.h"
#include "build/build_config.h"
#include "components/pref_registry/pref_registry_syncable.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "services/network/public/cpp/network_connection_tracker.h"
#include "services/network/public/mojom/host_resolver.mojom.h"
#include "url/gurl.h"
namespace network {
class SimpleURLLoader;
}
class PrefRegistrySimple;
#if !(BUILDFLAG(IS_MAC) || BUILDFLAG(IS_WIN) || BUILDFLAG(IS_LINUX) || \
BUILDFLAG(IS_CHROMEOS))
#error "IntranetRedirectDetector should only be built on Desktop platforms."
#endif
// 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 OmniboxNavigationObserver 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 network::NetworkConnectionTracker::NetworkConnectionObserver,
public network::mojom::DnsConfigChangeManagerClient {
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(const IntranetRedirectDetector&) = delete;
IntranetRedirectDetector& operator=(const IntranetRedirectDetector&) = delete;
~IntranetRedirectDetector() override;
// Returns the current redirect origin. This will be empty if no redirection
// is in place.
static GURL RedirectOrigin();
static void RegisterPrefs(PrefRegistrySimple* registry);
private:
// Called on connection or config change to ensure detector runs again (after
// a delay).
void Restart();
// Called when the startup or restart sleep has finished. Runs any pending
// fetch.
void FinishSleep();
// Invoked from SimpleURLLoader after download is complete.
void OnSimpleLoaderComplete(network::SimpleURLLoader* source,
std::unique_ptr<std::string> response_body);
// NetworkConnectionTracker::NetworkConnectionObserver
void OnConnectionChanged(network::mojom::ConnectionType type) override;
// network::mojom::DnsConfigChangeManagerClient
void OnDnsConfigChanged() override;
void SetupDnsConfigClient();
void OnDnsConfigClientConnectionError();
// Whether the IntranetRedirectDetector is enabled by policy. Disabled by
// default.
bool IsEnabledByPolicy();
GURL redirect_origin_;
std::map<network::SimpleURLLoader*, std::unique_ptr<network::SimpleURLLoader>>
simple_loaders_;
std::vector<GURL> resulting_origins_;
bool in_sleep_ = true; // 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.
mojo::Receiver<network::mojom::DnsConfigChangeManagerClient>
dns_config_client_receiver_{this};
base::WeakPtrFactory<IntranetRedirectDetector> weak_ptr_factory_{this};
};
#endif // CHROME_BROWSER_INTRANET_REDIRECT_DETECTOR_H_
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