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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "chrome/browser/intranet_redirect_detector.h" | 5 #include "chrome/browser/intranet_redirect_detector.h" |
| 6 | 6 |
| 7 #include "base/bind.h" | 7 #include "base/bind.h" |
| 8 #include "base/command_line.h" | 8 #include "base/command_line.h" |
| 9 #include "base/rand_util.h" | 9 #include "base/rand_util.h" |
| 10 #include "base/stl_util.h" | 10 #include "base/stl_util.h" |
| 11 #include "base/utf_string_conversions.h" | 11 #include "base/utf_string_conversions.h" |
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| 26 : redirect_origin_(g_browser_process->local_state()->GetString( | 26 : redirect_origin_(g_browser_process->local_state()->GetString( |
| 27 prefs::kLastKnownIntranetRedirectOrigin)), | 27 prefs::kLastKnownIntranetRedirectOrigin)), |
| 28 ALLOW_THIS_IN_INITIALIZER_LIST(weak_factory_(this)), | 28 ALLOW_THIS_IN_INITIALIZER_LIST(weak_factory_(this)), |
| 29 in_sleep_(true) { | 29 in_sleep_(true) { |
| 30 // Because this function can be called during startup, when kicking off a URL | 30 // Because this function can be called during startup, when kicking off a URL |
| 31 // fetch can eat up 20 ms of time, we delay seven seconds, which is hopefully | 31 // fetch can eat up 20 ms of time, we delay seven seconds, which is hopefully |
| 32 // long enough to be after startup, but still get results back quickly. | 32 // long enough to be after startup, but still get results back quickly. |
| 33 // Ideally, instead of this timer, we'd do something like "check if the | 33 // Ideally, instead of this timer, we'd do something like "check if the |
| 34 // browser is starting up, and if so, come back later", but there is currently | 34 // browser is starting up, and if so, come back later", but there is currently |
| 35 // no function to do this. | 35 // no function to do this. |
| 36 static const int kStartFetchDelaySeconds = 7; | 36 static const int kStartFetchDelayMS = 7000; |
| 37 MessageLoop::current()->PostDelayedTask(FROM_HERE, | 37 MessageLoop::current()->PostDelayedTask(FROM_HERE, |
| 38 base::Bind(&IntranetRedirectDetector::FinishSleep, | 38 base::Bind(&IntranetRedirectDetector::FinishSleep, |
| 39 weak_factory_.GetWeakPtr()), | 39 weak_factory_.GetWeakPtr()), |
| 40 base::TimeDelta::FromSeconds(kStartFetchDelaySeconds)); | 40 kStartFetchDelayMS); |
| 41 | 41 |
| 42 net::NetworkChangeNotifier::AddIPAddressObserver(this); | 42 net::NetworkChangeNotifier::AddIPAddressObserver(this); |
| 43 } | 43 } |
| 44 | 44 |
| 45 IntranetRedirectDetector::~IntranetRedirectDetector() { | 45 IntranetRedirectDetector::~IntranetRedirectDetector() { |
| 46 net::NetworkChangeNotifier::RemoveIPAddressObserver(this); | 46 net::NetworkChangeNotifier::RemoveIPAddressObserver(this); |
| 47 STLDeleteElements(&fetchers_); | 47 STLDeleteElements(&fetchers_); |
| 48 } | 48 } |
| 49 | 49 |
| 50 // static | 50 // static |
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| 147 if (in_sleep_) | 147 if (in_sleep_) |
| 148 return; | 148 return; |
| 149 | 149 |
| 150 // Since presumably many programs open connections after network changes, | 150 // Since presumably many programs open connections after network changes, |
| 151 // delay this a little bit. | 151 // delay this a little bit. |
| 152 in_sleep_ = true; | 152 in_sleep_ = true; |
| 153 static const int kNetworkSwitchDelayMS = 1000; | 153 static const int kNetworkSwitchDelayMS = 1000; |
| 154 MessageLoop::current()->PostDelayedTask(FROM_HERE, | 154 MessageLoop::current()->PostDelayedTask(FROM_HERE, |
| 155 base::Bind(&IntranetRedirectDetector::FinishSleep, | 155 base::Bind(&IntranetRedirectDetector::FinishSleep, |
| 156 weak_factory_.GetWeakPtr()), | 156 weak_factory_.GetWeakPtr()), |
| 157 base::TimeDelta::FromMilliseconds(kNetworkSwitchDelayMS)); | 157 kNetworkSwitchDelayMS); |
| 158 } | 158 } |
| 159 | 159 |
| 160 IntranetRedirectHostResolverProc::IntranetRedirectHostResolverProc( | 160 IntranetRedirectHostResolverProc::IntranetRedirectHostResolverProc( |
| 161 net::HostResolverProc* previous) | 161 net::HostResolverProc* previous) |
| 162 : net::HostResolverProc(previous) { | 162 : net::HostResolverProc(previous) { |
| 163 } | 163 } |
| 164 | 164 |
| 165 int IntranetRedirectHostResolverProc::Resolve( | 165 int IntranetRedirectHostResolverProc::Resolve( |
| 166 const std::string& host, | 166 const std::string& host, |
| 167 net::AddressFamily address_family, | 167 net::AddressFamily address_family, |
| 168 net::HostResolverFlags host_resolver_flags, | 168 net::HostResolverFlags host_resolver_flags, |
| 169 net::AddressList* addrlist, | 169 net::AddressList* addrlist, |
| 170 int* os_error) { | 170 int* os_error) { |
| 171 // We'd love to just ask the IntranetRedirectDetector, but we may not be on | 171 // We'd love to just ask the IntranetRedirectDetector, but we may not be on |
| 172 // the same thread. So just use the heuristic that any all-lowercase a-z | 172 // the same thread. So just use the heuristic that any all-lowercase a-z |
| 173 // hostname with the right number of characters is likely from the detector | 173 // hostname with the right number of characters is likely from the detector |
| 174 // (and thus should be blocked). | 174 // (and thus should be blocked). |
| 175 return ((host.length() == IntranetRedirectDetector::kNumCharsInHostnames) && | 175 return ((host.length() == IntranetRedirectDetector::kNumCharsInHostnames) && |
| 176 (host.find_first_not_of("abcdefghijklmnopqrstuvwxyz") == | 176 (host.find_first_not_of("abcdefghijklmnopqrstuvwxyz") == |
| 177 std::string::npos)) ? | 177 std::string::npos)) ? |
| 178 net::ERR_NAME_NOT_RESOLVED : | 178 net::ERR_NAME_NOT_RESOLVED : |
| 179 ResolveUsingPrevious(host, address_family, host_resolver_flags, addrlist, | 179 ResolveUsingPrevious(host, address_family, host_resolver_flags, addrlist, |
| 180 os_error); | 180 os_error); |
| 181 } | 181 } |
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