Function connect

3rdparty/libprocess/src/http.cpp:1514–1566

Future<Connection> connect(
    const network::Address& address,
    Scheme scheme,
    const Option<string>& peer_hostname)
{
  SocketImpl::Kind kind;

  switch (scheme) {
    case Scheme::HTTP:
    case Scheme::HTTP_UNIX:
      kind = SocketImpl::Kind::POLL;
      break;
#ifdef USE_SSL_SOCKET
    case Scheme::HTTPS:
      kind = SocketImpl::Kind::SSL;
      break;
#endif
  }

  Try<network::Socket> socket = network::Socket::create(
      address.family(),
      kind);

  if (socket.isError()) {
    return Failure("Failed to create socket: " + socket.error());
  }

  Future<Nothing> connected = [&]() {
    switch (scheme) {
      case Scheme::HTTP:
      case Scheme::HTTP_UNIX:
        return socket->connect(address);
#ifdef USE_SSL_SOCKET
      case Scheme::HTTPS:
        return socket->connect(
            address,
            network::openssl::create_tls_client_config(peer_hostname));
#endif
    }
    UNREACHABLE();
  }();

  return connected
    .then([socket, address]() -> Future<Connection> {
      Try<network::Address> localAddress = socket->address();
      if (localAddress.isError()) {
        return Failure("Failed to get socket's local address: " +
            localAddress.error());
      }

      return Connection(socket.get(), localAddress.get(), address);
    });
}


Future<Connection> connect(