clap.rs

App::new("rsurl")
          .version(crate_version!())
          .author(crate_authors!())
          .setting(AppSettings::AllowMissingPositional)
          .about("Http requests from the command line.")
          .arg(
              Arg::with_name("body")
                  .short("b")
                  .value_name("FILE")
                  .required(false),
          )
          .arg(
              Arg::with_name("method")
                  .possible_values(&Method::variants())
                  .required(false)
                  .default_value("GET"),
          )
          .arg(
              Arg::with_name("url")
                  .help("the request url")
                  .required(true)
                  .takes_value(true),
          )
          .get_matches()