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.
#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;
}
$ 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
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.