mirror of https://github.com/aria2/aria2
89 lines
3.8 KiB
C++
89 lines
3.8 KiB
C++
/* <!-- 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_HTTP_INITIATE_CONNECTION_COMMAND_H
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#define D_HTTP_INITIATE_CONNECTION_COMMAND_H
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#include "InitiateConnectionCommand.h"
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namespace aria2 {
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// HttpInitiateConnectionCommand determines remote host to connect and
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// resolves IP address from that hostname and creates subsequent
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// command. Usually, remote host is the host in URI. If proxy is
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// used, remote host becomes proxy server. This command searches
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// pooled socket using resolved IP addresses and use pooled socket if
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// available. The following chart shows what Command is followed
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// after this command based on conditions.
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//
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// HttpInitiateConnectionCommand
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// |
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// | proxy is used?
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// +----------------+
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// | |
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// | | pooled socket?
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// | +------------> HttpRequestCommand
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// | | tunnel?
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// | +------------> HttpProxyRequestCommand
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// | | otherwise
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// | +------------> HttpRequestCommand
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// | direct connection
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// +-----------------------------> HttpRequestCommand
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//
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// HttpInitiateConnectionCommand::execute() returns true when DNS is
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// in synchronous mode and address resolution was complete. When DNS
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// is in asynchronous mode, it may return false: This means address
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// resolution is in progress. After address resolution completed,
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// calling execute() returns true.
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class HttpInitiateConnectionCommand : public InitiateConnectionCommand {
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protected:
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virtual std::unique_ptr<Command> createNextCommand
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(const std::string& hostname, const std::string& addr, uint16_t port,
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const std::vector<std::string>& resolvedAddresses,
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const std::shared_ptr<Request>& proxyRequest);
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public:
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HttpInitiateConnectionCommand(cuid_t cuid, const std::shared_ptr<Request>& req,
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const std::shared_ptr<FileEntry>& fileEntry,
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RequestGroup* requestGroup,
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DownloadEngine* e);
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virtual ~HttpInitiateConnectionCommand();
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};
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} // namespace aria2
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#endif // D_HTTP_INITIATE_CONNECTION_COMMAND_H
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