download.cpp

很好用的网络封装库,不熟悉网络编程的人也可以使用。使用风格良好的标准c++编写。

//
// download.cpp
//
// $Id: //poco/1.3/Net/samples/download/src/download.cpp#1 $
//
// This sample demonstrates the URIStreamOpener class.
//
// Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#include "Poco/URIStreamOpener.h"
#include "Poco/StreamCopier.h"
#include "Poco/Path.h"
#include "Poco/URI.h"
#include "Poco/Exception.h"
#include "Poco/Net/HTTPStreamFactory.h"
#include "Poco/Net/FTPStreamFactory.h"
#include <memory>
#include <iostream>


using Poco::URIStreamOpener;
using Poco::StreamCopier;
using Poco::Path;
using Poco::URI;
using Poco::Exception;
using Poco::Net::HTTPStreamFactory;
using Poco::Net::FTPStreamFactory;


int main(int argc, char** argv)
{
	HTTPStreamFactory::registerFactory();
	FTPStreamFactory::registerFactory();
	
	if (argc != 2)
	{
		Path p(argv[0]);
		std::cerr << "usage: " << p.getBaseName() << " <uri>" << std::endl;
		std::cerr << "       Download <uri> to standard output." << std::endl;
		std::cerr << "       Works with http, ftp and file URIs." << std::endl;
		return 1;
	}

	try
	{
		URI uri(argv[1]);
		std::auto_ptr<std::istream> pStr(URIStreamOpener::defaultOpener().open(uri));
		StreamCopier::copyStream(*pStr.get(), std::cout);
	}
	catch (Exception& exc)
	{
		std::cerr << exc.displayText() << std::endl;
		return 1;
	}
		
	return 0;
}