dns-updater/ip/resolver/basic_http/service.go

package basic_http

import (
	"io"
	"net"
	"net/http"
	"strings"
)

type Service struct {
	ServiceName string
	Url         string
	Headers     http.Header
}

func (s Service) Name() string {
	return s.ServiceName
}

func (s Service) Lookup() (net.IP, error) {
	req, err := http.NewRequest("GET", s.Url, nil)
	if err != nil {
		return nil, err
	}

	req.Header = s.Headers

	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		return nil, err
	}

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		return nil, err
	}

	// Trim spaces and stuff.
	ip_str := strings.TrimSpace(string(body))

	return net.ParseIP(ip_str), err
}