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1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2006-2008 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_BASE_HOST_RESOLVER_H_ | 5 #ifndef NET_BASE_HOST_RESOLVER_H_ |
6 #define NET_BASE_HOST_RESOLVER_H_ | 6 #define NET_BASE_HOST_RESOLVER_H_ |
7 | 7 |
8 #include <string> | 8 #include <string> |
9 | 9 |
10 #include "base/ref_counted.h" | 10 #include "base/ref_counted.h" |
11 #include "googleurl/src/gurl.h" | 11 #include "googleurl/src/gurl.h" |
12 #include "net/base/completion_callback.h" | 12 #include "net/base/completion_callback.h" |
13 | 13 |
14 class MessageLoop; | 14 class MessageLoop; |
15 | 15 |
16 namespace net { | 16 namespace net { |
17 | 17 |
18 class AddressList; | 18 class AddressList; |
19 | 19 |
20 // This class represents the task of resolving hostnames (or IP address | 20 // This class represents the task of resolving hostnames (or IP address |
21 // literal) to an AddressList object. | 21 // literal) to an AddressList object. |
22 // | 22 // |
23 // HostResolver can handle multiple requests at a time, so when cancelling a | 23 // HostResolver can handle multiple requests at a time, so when cancelling a |
24 // request the RequestHandle that was returned by Resolve() needs to be | 24 // request the RequestHandle that was returned by Resolve() needs to be |
25 // given. A simpler alternative for consumers that only have 1 outstanding | 25 // given. A simpler alternative for consumers that only have 1 outstanding |
26 // request at a time is to create a SingleRequestHostResolver wrapper around | 26 // request at a time is to create a SingleRequestHostResolver wrapper around |
27 // HostResolver (which will automatically cancel the single request when it | 27 // HostResolver (which will automatically cancel the single request when it |
28 // goes out of scope). | 28 // goes out of scope). |
29 class HostResolver : public base::RefCounted<HostResolver> { | 29 class HostResolver : public base::RefCountedThreadSafe<HostResolver> { |
30 public: | 30 public: |
31 // The parameters for doing a Resolve(). |hostname| and |port| are required, | 31 // The parameters for doing a Resolve(). |hostname| and |port| are required, |
32 // the rest are optional (and have reasonable defaults). | 32 // the rest are optional (and have reasonable defaults). |
33 class RequestInfo { | 33 class RequestInfo { |
34 public: | 34 public: |
35 RequestInfo(const std::string& hostname, int port) | 35 RequestInfo(const std::string& hostname, int port) |
36 : hostname_(hostname), | 36 : hostname_(hostname), |
37 port_(port), | 37 port_(port), |
38 allow_cached_response_(true), | 38 allow_cached_response_(true), |
39 is_speculative_(false) {} | 39 is_speculative_(false) {} |
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168 }; | 168 }; |
169 | 169 |
170 // Creates a HostResolver implementation that queries the underlying system. | 170 // Creates a HostResolver implementation that queries the underlying system. |
171 // (Except if a unit-test has changed the global HostResolverProc using | 171 // (Except if a unit-test has changed the global HostResolverProc using |
172 // ScopedHostResolverProc to intercept requests to the system). | 172 // ScopedHostResolverProc to intercept requests to the system). |
173 HostResolver* CreateSystemHostResolver(); | 173 HostResolver* CreateSystemHostResolver(); |
174 | 174 |
175 } // namespace net | 175 } // namespace net |
176 | 176 |
177 #endif // NET_BASE_HOST_RESOLVER_H_ | 177 #endif // NET_BASE_HOST_RESOLVER_H_ |
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