Wie man den Host aus einer URL in C++ mit Boost::URL parst

Wenn du eine URL wie diese hast:

snippet.cpp

std::string myURL = "https://subdomain.example.com/api/test";

std::string myURL = "https://subdomain.example.com/api/test";

kannst du den Hostnamen daraus mit Boost::URL parsen (du benötigst mindestens Boost 1.81.0, frühere Boost-Versionen haben kein Boost.URL) mit

snippet2.cpp

boost::urls::url_view url(myURL);
std::string host = url.host();

std::cout << host << std::endl; // Prints "subdomain.example.com"

boost::urls::url_view url(myURL);
std::string host = url.host();

std::cout << host << std::endl; // Prints "subdomain.example.com"

Vollständiges Beispiel:

urlhost.cpp

#include <string>
#include <iostream>

#include <boost/url.hpp>

int main() {
    std::string myURL = "https://subdomain.example.com/api/test";

    boost::urls::url_view url(myURL);
    std::string host = url.host();

    std::cout << host << std::endl; // Prints "subdomain.example.com"
}

#include <string>
#include <iostream>

#include <boost/url.hpp>

int main() {
    std::string myURL = "https://subdomain.example.com/api/test";

    boost::urls::url_view url(myURL);
    std::string host = url.host();

    std::cout << host << std::endl; // Prints "subdomain.example.com"
}

Kompilieren mit

build_urlhost.sh

g++ -o urlhost urlhost.cpp -lboost_url

g++ -o urlhost urlhost.cpp -lboost_url