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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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/prefs/pref_registry_simple.h" | 9 #include "base/prefs/pref_registry_simple.h" |
10 #include "base/prefs/pref_service.h" | 10 #include "base/prefs/pref_service.h" |
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28 prefs::kLastKnownIntranetRedirectOrigin)), | 28 prefs::kLastKnownIntranetRedirectOrigin)), |
29 weak_factory_(this), | 29 weak_factory_(this), |
30 in_sleep_(true) { | 30 in_sleep_(true) { |
31 // Because this function can be called during startup, when kicking off a URL | 31 // Because this function can be called during startup, when kicking off a URL |
32 // fetch can eat up 20 ms of time, we delay seven seconds, which is hopefully | 32 // fetch can eat up 20 ms of time, we delay seven seconds, which is hopefully |
33 // long enough to be after startup, but still get results back quickly. | 33 // long enough to be after startup, but still get results back quickly. |
34 // Ideally, instead of this timer, we'd do something like "check if the | 34 // Ideally, instead of this timer, we'd do something like "check if the |
35 // browser is starting up, and if so, come back later", but there is currently | 35 // browser is starting up, and if so, come back later", but there is currently |
36 // no function to do this. | 36 // no function to do this. |
37 static const int kStartFetchDelaySeconds = 7; | 37 static const int kStartFetchDelaySeconds = 7; |
38 MessageLoop::current()->PostDelayedTask(FROM_HERE, | 38 base::MessageLoop::current()->PostDelayedTask(FROM_HERE, |
39 base::Bind(&IntranetRedirectDetector::FinishSleep, | 39 base::Bind(&IntranetRedirectDetector::FinishSleep, |
40 weak_factory_.GetWeakPtr()), | 40 weak_factory_.GetWeakPtr()), |
41 base::TimeDelta::FromSeconds(kStartFetchDelaySeconds)); | 41 base::TimeDelta::FromSeconds(kStartFetchDelaySeconds)); |
42 | 42 |
43 net::NetworkChangeNotifier::AddIPAddressObserver(this); | 43 net::NetworkChangeNotifier::AddIPAddressObserver(this); |
44 } | 44 } |
45 | 45 |
46 IntranetRedirectDetector::~IntranetRedirectDetector() { | 46 IntranetRedirectDetector::~IntranetRedirectDetector() { |
47 net::NetworkChangeNotifier::RemoveIPAddressObserver(this); | 47 net::NetworkChangeNotifier::RemoveIPAddressObserver(this); |
48 STLDeleteElements(&fetchers_); | 48 STLDeleteElements(&fetchers_); |
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152 | 152 |
153 void IntranetRedirectDetector::OnIPAddressChanged() { | 153 void IntranetRedirectDetector::OnIPAddressChanged() { |
154 // If a request is already scheduled, do not scheduled yet another one. | 154 // If a request is already scheduled, do not scheduled yet another one. |
155 if (in_sleep_) | 155 if (in_sleep_) |
156 return; | 156 return; |
157 | 157 |
158 // Since presumably many programs open connections after network changes, | 158 // Since presumably many programs open connections after network changes, |
159 // delay this a little bit. | 159 // delay this a little bit. |
160 in_sleep_ = true; | 160 in_sleep_ = true; |
161 static const int kNetworkSwitchDelayMS = 1000; | 161 static const int kNetworkSwitchDelayMS = 1000; |
162 MessageLoop::current()->PostDelayedTask(FROM_HERE, | 162 base::MessageLoop::current()->PostDelayedTask(FROM_HERE, |
163 base::Bind(&IntranetRedirectDetector::FinishSleep, | 163 base::Bind(&IntranetRedirectDetector::FinishSleep, |
164 weak_factory_.GetWeakPtr()), | 164 weak_factory_.GetWeakPtr()), |
165 base::TimeDelta::FromMilliseconds(kNetworkSwitchDelayMS)); | 165 base::TimeDelta::FromMilliseconds(kNetworkSwitchDelayMS)); |
166 } | 166 } |
167 | 167 |
168 IntranetRedirectHostResolverProc::IntranetRedirectHostResolverProc( | 168 IntranetRedirectHostResolverProc::IntranetRedirectHostResolverProc( |
169 net::HostResolverProc* previous) | 169 net::HostResolverProc* previous) |
170 : net::HostResolverProc(previous) { | 170 : net::HostResolverProc(previous) { |
171 } | 171 } |
172 | 172 |
173 int IntranetRedirectHostResolverProc::Resolve( | 173 int IntranetRedirectHostResolverProc::Resolve( |
174 const std::string& host, | 174 const std::string& host, |
175 net::AddressFamily address_family, | 175 net::AddressFamily address_family, |
176 net::HostResolverFlags host_resolver_flags, | 176 net::HostResolverFlags host_resolver_flags, |
177 net::AddressList* addrlist, | 177 net::AddressList* addrlist, |
178 int* os_error) { | 178 int* os_error) { |
179 // We'd love to just ask the IntranetRedirectDetector, but we may not be on | 179 // We'd love to just ask the IntranetRedirectDetector, but we may not be on |
180 // the same thread. So just use the heuristic that any all-lowercase a-z | 180 // the same thread. So just use the heuristic that any all-lowercase a-z |
181 // hostname with the right number of characters is likely from the detector | 181 // hostname with the right number of characters is likely from the detector |
182 // (and thus should be blocked). | 182 // (and thus should be blocked). |
183 return ((host.length() == IntranetRedirectDetector::kNumCharsInHostnames) && | 183 return ((host.length() == IntranetRedirectDetector::kNumCharsInHostnames) && |
184 (host.find_first_not_of("abcdefghijklmnopqrstuvwxyz") == | 184 (host.find_first_not_of("abcdefghijklmnopqrstuvwxyz") == |
185 std::string::npos)) ? | 185 std::string::npos)) ? |
186 net::ERR_NAME_NOT_RESOLVED : | 186 net::ERR_NAME_NOT_RESOLVED : |
187 ResolveUsingPrevious(host, address_family, host_resolver_flags, addrlist, | 187 ResolveUsingPrevious(host, address_family, host_resolver_flags, addrlist, |
188 os_error); | 188 os_error); |
189 } | 189 } |
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