Dynamic DNS update script

ddns.go

@@ -0,0 +1,80 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"os"
+	"strings"
+)
+
+const (
+	updateUrl = "https://api.porkbun.com/api/json/v3/dns/editByNameType/awstinchubb.com/A"
+	getUrl    = "https://api.porkbun.com/api/json/v3/dns/retrieveByNameType/awstinchubb.com/A"
+	apiKey    = "DDNS_API_KEY"
+	secretKey = "DDNS_SECRET_KEY"
+)
+
+type Record struct {
+	Id      string
+	Name    string
+	Type    string
+	Content string
+	Ttl     string
+	Prio    string
+	Notes   string
+}
+
+type ResponseBody struct {
+	Status     string
+	Cloudflare string
+	Records    []Record
+}
+
+func main() {
+	ip := getIp()
+	record := getRecord()
+
+	if ip != record.Content {
+		updateRecord(ip)
+	}
+}
+
+func getRecord() Record {
+	body := strings.NewReader(fmt.Sprintf("{\"secretapikey\": \"%s\", \"apikey\": \"%s\"}", os.Getenv(secretKey), os.Getenv(apiKey)))
+
+	resp, err := http.Post(getUrl, "application/json", body)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer resp.Body.Close()
+
+	resBodyBites, err := io.ReadAll(resp.Body)
+	var resBody ResponseBody
+	json.Unmarshal(resBodyBites, &resBody)
+	return resBody.Records[0]
+}
+
+func updateRecord(ipAddr string) {
+	body := strings.NewReader(fmt.Sprintf("{\"secretapikey\": \"%s\", \"apikey\": \"%s\", \"content\": \"%s\", \"ttl\": \"600\"}", os.Getenv(secretKey), os.Getenv(apiKey), ipAddr))
+	fmt.Println(body)
+
+	resp, err := http.Post(updateUrl, "application/json", body)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer resp.Body.Close()
+}
+
+func getIp() string {
+	resp, err := http.Get("https://icanhazip.com")
+
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer resp.Body.Close()
+	resBodyBites, err := io.ReadAll(resp.Body)
+	return strings.TrimSpace(string(resBodyBites))
+}