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Side by Side Diff: net/dns/host_resolver.h

Issue 1898033006: DNS: Add stubs for persisting data across restarts (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: *silently glares at editor, reuploads with proper spacing* Created 4 years, 4 months ago
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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 #ifndef NET_DNS_HOST_RESOLVER_H_ 5 #ifndef NET_DNS_HOST_RESOLVER_H_
6 #define NET_DNS_HOST_RESOLVER_H_ 6 #define NET_DNS_HOST_RESOLVER_H_
7 7
8 #include <stddef.h> 8 #include <stddef.h>
9 #include <stdint.h> 9 #include <stdint.h>
10 10
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179 virtual void SetDnsClientEnabled(bool enabled); 179 virtual void SetDnsClientEnabled(bool enabled);
180 180
181 // Returns the HostResolverCache |this| uses, or NULL if there isn't one. 181 // Returns the HostResolverCache |this| uses, or NULL if there isn't one.
182 // Used primarily to clear the cache and for getting debug information. 182 // Used primarily to clear the cache and for getting debug information.
183 virtual HostCache* GetHostCache(); 183 virtual HostCache* GetHostCache();
184 184
185 // Returns the current DNS configuration |this| is using, as a Value, or 185 // Returns the current DNS configuration |this| is using, as a Value, or
186 // nullptr if it's configured to always use the system host resolver. 186 // nullptr if it's configured to always use the system host resolver.
187 virtual std::unique_ptr<base::Value> GetDnsConfigAsValue() const; 187 virtual std::unique_ptr<base::Value> GetDnsConfigAsValue() const;
188 188
189 typedef base::Callback<void(std::unique_ptr<const base::Value>)>
190 PersistCallback;
191 // Configures the HostResolver to be able to persist data (e.g. observed
192 // performance) between sessions. |persist_callback| is a callback that will
193 // be called when the HostResolver wants to persist data; |old_data| is the
194 // data last persisted by the resolver on the previous session.
195 virtual void InitializePersistence(
196 const PersistCallback& persist_callback,
197 std::unique_ptr<const base::Value> old_data);
198
189 // Creates a HostResolver implementation that queries the underlying system. 199 // Creates a HostResolver implementation that queries the underlying system.
190 // (Except if a unit-test has changed the global HostResolverProc using 200 // (Except if a unit-test has changed the global HostResolverProc using
191 // ScopedHostResolverProc to intercept requests to the system). 201 // ScopedHostResolverProc to intercept requests to the system).
192 static std::unique_ptr<HostResolver> CreateSystemResolver( 202 static std::unique_ptr<HostResolver> CreateSystemResolver(
193 const Options& options, 203 const Options& options,
194 NetLog* net_log); 204 NetLog* net_log);
195 205
196 // As above, but uses default parameters. 206 // As above, but uses default parameters.
197 static std::unique_ptr<HostResolver> CreateDefaultResolver(NetLog* net_log); 207 static std::unique_ptr<HostResolver> CreateDefaultResolver(NetLog* net_log);
198 208
199 protected: 209 protected:
200 HostResolver(); 210 HostResolver();
201 211
202 private: 212 private:
203 DISALLOW_COPY_AND_ASSIGN(HostResolver); 213 DISALLOW_COPY_AND_ASSIGN(HostResolver);
204 }; 214 };
205 215
206 } // namespace net 216 } // namespace net
207 217
208 #endif // NET_DNS_HOST_RESOLVER_H_ 218 #endif // NET_DNS_HOST_RESOLVER_H_
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