cpp-netlib v0.9.3

Home | Table of contents | What's new | Getting started | Examples | In depth | Reference

« previous | up | next »

Atom feed reader

The next examples show some simple, more practical applications using the HTTP client. The first one reads a simple Atom feed and prints the titles of each entry to the console.

The code

#include "atom.hpp"
#include <boost/network/protocol/http/client.hpp>
#include <boost/foreach.hpp>
#include <iostream>

int main(int argc, char * argv[]) {
    using namespace boost::network;

    if (argc != 2) {
        std::cout << "Usage: " << argv[0] << " <url>" << std::endl;
        return 1;
    }

    try {
        http::client client;
        http::client::request request(argv[1]);
        request << header("Connection", "close");
        http::client::response response = client.get(request);
        atom::feed feed(response);

        std::cout << "Feed: " << feed.title()
                  << " (" << feed.subtitle() << ")" << std::endl;
        BOOST_FOREACH(const atom::entry &entry, feed) {
            std::cout << entry.title()
                      << " (" << entry.published() << ")" << std::endl;
        }
    }
    catch (std::exception &e) {
        std::cerr << e.what() << std::endl;
    }

    return 0;
}

Building and running atom_reader

$ cd ~/cpp-netlib-build
$ make atom_reader

And to run the example from the command line to access the feed that lists of all the commits on cpp-netlib’s master branch:

$ ./example/atom_reader https://github.com/cpp-netlib/cpp-netlib/commits/master.atom

Diving into the code

Most of this will now be familiar. The response is passed to the constructor to the atom::feed class, which parses the resultant XML. To keep this example as simple as possible, rapidxml, a header-only XML parser library, was used to parse the response.

A similar example using RSS feeds exists in libs/network/example/rss.

« previous | up | next »