mirror of https://github.com/aria2/aria2
83 lines
2.5 KiB
C
83 lines
2.5 KiB
C
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/* <!-- copyright */
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/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2006 Tatsuhiro Tsujikawa
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link the code of portions of this program with the
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* OpenSSL library under certain conditions as described in each
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* individual source file, and distribute linked combinations
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* including the two.
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* You must obey the GNU General Public License in all respects
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* for all of the code used other than OpenSSL. If you modify
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* file(s) with this exception, you may extend this exception to your
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* version of the file(s), but you are not obligated to do so. If you
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* do not wish to do so, delete this exception statement from your
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* version. If you delete this exception statement from all source
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* files in the program, then also delete it here.
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*/
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/* copyright --> */
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#ifndef _D_DNS_CACHE_H_
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#define _D_DNS_CACHE_H_
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#include "common.h"
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#include <map>
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class DNSCache {
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public:
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virtual ~DNSCache() {}
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virtual string find(const string& hostname) = 0;
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virtual void put(const string& hostname, const string& ipaddr) = 0;
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};
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typedef SharedHandle<DNSCache> DNSCacheHandle;
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typedef SingletonHolder<DNSCacheHandle> DNSCacheSingletonHolder;
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class SimpleDNSCache : public DNSCache {
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private:
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map<string, string> _table;
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public:
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SimpleDNSCache() {}
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virtual ~SimpleDNSCache() {}
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virtual string find(const string& hostname)
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{
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return _table[hostname];
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}
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virtual void put(const string& hostname, const string& ipaddr)
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{
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_table[hostname] = ipaddr;
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}
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};
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class NullDNSCache : public DNSCache {
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public:
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virtual ~NullDNSCache() {}
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virtual string find(const string& hostname) { return ""; }
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virtual void put(const string& hostname, const string& ipaddr) {}
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};
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#endif // _D_DNS_CACHE_H_
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