mdd/thirdparty/curlpp/examples/example10.cpp

/*
 *    Copyright (c) <2002-2005> <Jean-Philippe Barrette-LaPierre>
 *    
 *    Permission is hereby granted, free of charge, to any person obtaining
 *    a copy of this software and associated documentation files 
 *    (curlpp), to deal in the Software without restriction, 
 *    including without limitation the rights to use, copy, modify, merge,
 *    publish, distribute, sublicense, and/or sell copies of the Software,
 *    and to permit persons to whom the Software is furnished to do so, 
 *    subject to the following conditions:
 *    
 *    The above copyright notice and this permission notice shall be included
 *    in all copies or substantial portions of the Software.
 *    
 *    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 AND NONINFRINGEMENT. 
 *    IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 
 *    CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 
 *    TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 *    SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

/**
* \file
* WriteFunction option using functor.
* Writing to FILE*
* 
*/


#include <cstdlib>
#include <cstdio>
#include <cstring>

#include <curlpp/cURLpp.hpp>
#include <curlpp/Easy.hpp>
#include <curlpp/Options.hpp>
#include <curlpp/Exception.hpp>

#define MAX_FILE_LENGTH 20000

size_t 
FileCallback(FILE *f, char* ptr, size_t size, size_t nmemb)
{
	return fwrite(ptr, size, nmemb, f);
};


int main(int argc, char *argv[])
{
	if(argc != 3)
	{
		std::cerr << argv[0] << ": Wrong number of arguments" << std::endl 
			<< argv[0] << ": Usage: " << " url file" 
			<< std::endl;

		return EXIT_FAILURE;
	}

	char *url = argv[1];
	char *filename = argv[2];
	FILE * file = fopen(filename, "w");
	if (!file)
	{
		std::cerr << "Error opening " << filename << std::endl;
		return EXIT_FAILURE;
	}

	try
	{
		curlpp::Cleanup cleaner;
		curlpp::Easy request;

		// Set the writer callback to enable cURL to write result in a memory area
		using namespace std::placeholders;
		curlpp::options::WriteFunction *test = new curlpp::options::WriteFunction(std::bind(&FileCallback, file, _1, _2, _3));
		request.setOpt(test);

		// Setting the URL to retrive.
		request.setOpt(new curlpp::options::Url(url));
		request.setOpt(new curlpp::options::Verbose(true));
		request.perform();

		return EXIT_SUCCESS;
	}

	catch ( curlpp::LogicError & e )
	{
		std::cout << e.what() << std::endl;
	}

	catch ( curlpp::RuntimeError & e )
	{
		std::cout << e.what() << std::endl;
	}

	return EXIT_FAILURE;
}