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. 4 5 #ifndef NET_BASE_MAPPED_HOST_RESOLVER_H_ 6 #define NET_BASE_MAPPED_HOST_RESOLVER_H_ 7 #pragma once 8 9 #include <string> 10 11 #include "base/memory/scoped_ptr.h" 12 #include "net/base/host_mapping_rules.h" 13 #include "net/base/host_resolver.h" 14 15 namespace net { 16 17 // This class wraps an existing HostResolver instance, but modifies the 18 // request before passing it off to |impl|. This is different from 19 // MockHostResolver which does the remapping at the HostResolverProc 20 // layer, so it is able to preserve the effectiveness of the cache. 21 class MappedHostResolver : public HostResolver { 22 public: 23 // Creates a MappedHostResolver that forwards all of its requests through 24 // |impl|. It takes ownership of |impl|. 25 explicit MappedHostResolver(HostResolver* impl); 26 virtual ~MappedHostResolver(); 27 28 // Adds a rule to this mapper. The format of the rule can be one of: 29 // 30 // "MAP" <hostname_pattern> <replacement_host> [":" <replacement_port>] 31 // "EXCLUDE" <hostname_pattern> 32 // 33 // The <replacement_host> can be either a hostname, or an IP address literal. 34 // 35 // Returns true if the rule was successfully parsed and added. AddRuleFromString(const std::string & rule_string)36 bool AddRuleFromString(const std::string& rule_string) { 37 return rules_.AddRuleFromString(rule_string); 38 } 39 40 // Takes a comma separated list of rules, and assigns them to this resolver. SetRulesFromString(const std::string & rules_string)41 void SetRulesFromString(const std::string& rules_string) { 42 rules_.SetRulesFromString(rules_string); 43 } 44 45 // HostResolver methods: 46 virtual int Resolve(const RequestInfo& info, 47 AddressList* addresses, 48 CompletionCallback* callback, 49 RequestHandle* out_req, 50 const BoundNetLog& net_log); 51 virtual void CancelRequest(RequestHandle req); 52 virtual void AddObserver(Observer* observer); 53 virtual void RemoveObserver(Observer* observer); 54 virtual HostResolverImpl* GetAsHostResolverImpl(); 55 56 private: 57 scoped_ptr<HostResolver> impl_; 58 59 HostMappingRules rules_; 60 }; 61 62 } // namespace net 63 64 #endif // NET_BASE_MAPPED_HOST_RESOLVER_H_ 65