std::regex URL parser
Posted by Anonymous on Tue 23rd Jan 2024 13:52
raw | new post

#include <regex>
#include <iostream>

/* be aware of https://stackoverflow.com/questions/39645660/stdregex-to-match-begin-end-of-string */
int main(int ac, char *av[]
{
  std::string Input{"myurl://foo:80/bar"};
  std::regex Pattern{"^(.+?)://(((.+?)(:(.+?))?@)?((.+?)(?::([0-9]+)){0,1}))(/(.*?))?$",
        std::regex_constants::ECMAScript};
  std::smatch Matches;

  if (std::regex_search(Input, Matches,
                        Pattern)) {
    std::cout << Matches.size()
              << " submatches found!";
    for (size_t i{0}; i < Matches.size(); ++i) {
      std::cout << "\n\nSubmatch " << i << ": "
                << Matches[i] << "\n  Length: "
                << Matches[i].length()
                << "\n  First Character: "
                << *Matches[i].first
                << "\n  Position: "
                << Matches.position(i) << std::endl;
    }
  }
  return 0;
}