C++ Network Library Code

//          Copyright Dean Michael Berris 2008.
// Distributed under the Boost Software License, Version 1.0.
//    (See accompanying file LICENSE_1_0.txt or copy at
//          http://www.boost.org/LICENSE_1_0.txt)

//[ http_client_main
/*`
  This application takes a URL as a command line argument and prints
  the resource to the console.
*/
#include <boost/program_options.hpp>
#include <boost/network/protocol/http.hpp>
#include <string>
#include <iostream>

namespace po = boost::program_options;
using namespace std;

int main(int argc, char * argv[]) {
    po::options_description options("Allowed options");
    string output_filename, source;
    bool show_headers;
    options.add_options()
        ("help,h", "produce help message")
        ("headers,H", "print headers")
        ("source,s", po::value<string>(&source), "source URL")
        ;

    po::positional_options_description positional_options;
    positional_options.add("source", 1);
    po::variables_map vm;
    try {
        po::store(po::command_line_parser(argc, argv).options(options).positional(positional_options).run(),
            vm);
        po::notify(vm);
    } catch(exception & e) {
        cout << "Error: " << e.what() << endl;
        cout << options << endl;
        return EXIT_FAILURE;
    };

    if (vm.count("help")) {
        cout << options << endl;
        return EXIT_SUCCESS;
    };

    if (vm.count("source") < 1) {
        cout << "Error: Source URL required." << endl;
        cout << options << endl;
        return EXIT_FAILURE;
    };

    show_headers = vm.count("headers") ? true : false ;

    try {
        using namespace boost::network;

        http::request request(source);
        http::client client;
        http::response response;
        response = client.get(request);

        if (show_headers) {
            headers_range<http::response>::type headers_ = headers(response);
            boost::range_iterator<headers_range<http::response>::type>::type header, past_end;
            header = begin(headers_);
            past_end = end(headers_);
            while (header != past_end) {
                cout << header->first << ": " << header->second << endl;
                ++header;
            };
            cout << endl;
        };

        cout << body(response) << endl;
        
    } catch (exception & e) {
        cout << "Error: " << e.what() << endl;
        return EXIT_FAILURE;
    };

    return EXIT_SUCCESS;
}
//]