QUIC - wait for disk cache to load server config if the server is among
[chromium-blink-merge.git] / net / proxy / proxy_config_service_win.h
blobce17e05700b1e1db53f1ce254004f8e1c123f3c4
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
3 // found in the LICENSE file.
5 #ifndef NET_PROXY_PROXY_CONFIG_SERVICE_WIN_H_
6 #define NET_PROXY_PROXY_CONFIG_SERVICE_WIN_H_
8 #include <windows.h>
9 #include <winhttp.h>
11 #include <vector>
13 #include "base/compiler_specific.h"
14 #include "base/gtest_prod_util.h"
15 #include "net/proxy/polling_proxy_config_service.h"
17 namespace base {
18 namespace win {
19 class RegKey;
21 } // namespace base.
23 namespace net {
25 // Implementation of ProxyConfigService that retrieves the system proxy
26 // settings.
28 // It works by calling WinHttpGetIEProxyConfigForCurrentUser() to fetch the
29 // Internet Explorer proxy settings.
31 // We use two different strategies to notice when the configuration has
32 // changed:
34 // (1) Watch the internet explorer settings registry keys for changes. When
35 // one of the registry keys pertaining to proxy settings has changed, we
36 // call WinHttpGetIEProxyConfigForCurrentUser() again to read the
37 // configuration's new value.
39 // (2) Do regular polling every 10 seconds during network activity to see if
40 // WinHttpGetIEProxyConfigForCurrentUser() returns something different.
42 // Ideally strategy (1) should be sufficient to pick up all of the changes.
43 // However we still do the regular polling as a precaution in case the
44 // implementation details of WinHttpGetIEProxyConfigForCurrentUser() ever
45 // change, or in case we got it wrong (and are not checking all possible
46 // registry dependencies).
47 class NET_EXPORT_PRIVATE ProxyConfigServiceWin
48 : public PollingProxyConfigService {
49 public:
50 ProxyConfigServiceWin();
51 ~ProxyConfigServiceWin() override;
53 // Overrides a function from PollingProxyConfigService.
54 void AddObserver(Observer* observer) override;
56 private:
57 FRIEND_TEST_ALL_PREFIXES(ProxyConfigServiceWinTest, SetFromIEConfig);
58 typedef std::vector<base::win::RegKey*> RegKeyList;
60 // Registers change observers on the registry keys relating to proxy settings.
61 void StartWatchingRegistryForChanges();
63 // Creates a new key and appends it to |keys_to_watch_|. If the key fails to
64 // be created, it is not appended to the list and we return false.
65 bool AddKeyToWatchList(HKEY rootkey, const wchar_t* subkey);
67 // This is called whenever one of the registry keys we are watching change.
68 void OnObjectSignaled(base::win::RegKey* key);
70 static void GetCurrentProxyConfig(ProxyConfig* config);
72 // Set |config| using the proxy configuration values of |ie_config|.
73 static void SetFromIEConfig(
74 ProxyConfig* config,
75 const WINHTTP_CURRENT_USER_IE_PROXY_CONFIG& ie_config);
77 RegKeyList keys_to_watch_;
80 } // namespace net
82 #endif // NET_PROXY_PROXY_CONFIG_SERVICE_WIN_H_