initial commit

.gitignore

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+.env
+/.idea/

go.mod

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+module gitlab.com/durfy/durpdns
+
+go 1.24.1
+
+require (
+	github.com/caarlos0/env/v6 v6.10.1
+	github.com/cloudflare/cloudflare-go/v4 v4.1.0
+	github.com/joho/godotenv v1.5.1
+)
+
+require (
+	github.com/tidwall/gjson v1.14.4 // indirect
+	github.com/tidwall/match v1.1.1 // indirect
+	github.com/tidwall/pretty v1.2.1 // indirect
+	github.com/tidwall/sjson v1.2.5 // indirect
+)

go.sum

@@ -0,0 +1,16 @@
+github.com/caarlos0/env/v6 v6.10.1 h1:t1mPSxNpei6M5yAeu1qtRdPAK29Nbcf/n3G7x+b3/II=
+github.com/caarlos0/env/v6 v6.10.1/go.mod h1:hvp/ryKXKipEkcuYjs9mI4bBCg+UI0Yhgm5Zu0ddvwc=
+github.com/cloudflare/cloudflare-go/v4 v4.1.0 h1:1SjQZaPbUe23fSoCuMuN7EblVo+RIldNGd4pfkPCpW4=
+github.com/cloudflare/cloudflare-go/v4 v4.1.0/go.mod h1:XcYpLe7Mf6FN87kXzEWVnJ6z+vskW/k6eUqgqfhFE9k=
+github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
+github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
+github.com/tidwall/gjson v1.14.2/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
+github.com/tidwall/gjson v1.14.4 h1:uo0p8EbA09J7RQaflQ1aBRffTR7xedD2bcIVSYxLnkM=
+github.com/tidwall/gjson v1.14.4/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
+github.com/tidwall/match v1.1.1 h1:+Ho715JplO36QYgwN9PGYNhgZvoUSc9X2c80KVTi+GA=
+github.com/tidwall/match v1.1.1/go.mod h1:eRSPERbgtNPcGhD8UCthc6PmLEQXEWd3PRB5JTxsfmM=
+github.com/tidwall/pretty v1.2.0/go.mod h1:ITEVvHYasfjBbM0u2Pg8T2nJnzm8xPwvNhhsoaGGjNU=
+github.com/tidwall/pretty v1.2.1 h1:qjsOFOWWQl+N3RsoF5/ssm1pHmJJwhjlSbZ51I6wMl4=
+github.com/tidwall/pretty v1.2.1/go.mod h1:ITEVvHYasfjBbM0u2Pg8T2nJnzm8xPwvNhhsoaGGjNU=
+github.com/tidwall/sjson v1.2.5 h1:kLy8mja+1c9jlljvWTlSazM7cKDRfJuR/bOJhcY5NcY=
+github.com/tidwall/sjson v1.2.5/go.mod h1:Fvgq9kS/6ociJEDnK0Fk1cpYF4FIW6ZF7LAe+6jwd28=

main.go

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+package main
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"github.com/caarlos0/env/v6"
+	"github.com/cloudflare/cloudflare-go/v4"
+	"github.com/cloudflare/cloudflare-go/v4/dns"
+	"github.com/cloudflare/cloudflare-go/v4/option"
+	"github.com/joho/godotenv"
+	"io"
+	"log"
+	"net/http"
+	"time"
+)
+
+type IPResponse struct {
+	IPAddress   string `json:"YourFuckingIPAddress"`
+	Location    string `json:"YourFuckingLocation"`
+	Hostname    string `json:"YourFuckingHostname"`
+	ISP         string `json:"YourFuckingISP"`
+	TorExit     bool   `json:"YourFuckingTorExit"`
+	City        string `json:"YourFuckingCity"`
+	Country     string `json:"YourFuckingCountry"`
+	CountryCode string `json:"YourFuckingCountryCode"`
+}
+
+type Config struct {
+	CloudflareZoneID string `env:"CLOUDFLARE_ZONE_ID"`
+	CloudFlareAPIKey string `env:"CLOUDFLARE_API_KEY"`
+	CloudflareEmail  string `env:"CLOUDFLARE_EMAIL"`
+}
+
+func main() {
+
+	err := godotenv.Load(".env")
+	if err != nil {
+		log.Fatal("Failed to load env file")
+		return
+	}
+
+	config := &Config{}
+	err = env.Parse(config)
+	if err != nil {
+		log.Fatal("Failed to load env file")
+		return
+	}
+
+	if config.CloudflareEmail == "" || config.CloudFlareAPIKey == "" || config.CloudflareZoneID == "" {
+		log.Fatal("Email, API and ZoneID need to be set")
+		return
+	}
+
+	client := cloudflare.NewClient(
+		option.WithAPIKey(config.CloudFlareAPIKey),
+		option.WithAPIEmail(config.CloudflareEmail),
+	)
+
+	ExistingIP, err := getIP()
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	fmt.Println("Your public IP address is:", ExistingIP.IPAddress)
+
+do:
+	for {
+		CurrentIP, err := getIP()
+		if err != nil {
+			fmt.Println(err)
+			break
+		}
+
+		if ExistingIP.IPAddress != CurrentIP.IPAddress {
+			ExistingIP = CurrentIP
+			fmt.Println(
+				"Your public IP address has updated:",
+				ExistingIP.IPAddress,
+			)
+
+			err := updateDNSRecords(
+				client,
+				config.CloudflareZoneID,
+				CurrentIP.IPAddress,
+			)
+			if err != nil {
+				fmt.Println(err)
+				break
+			}
+
+		} else {
+			fmt.Println("Your public IP address has not changed.")
+		}
+
+		time.Sleep(10 * time.Second)
+		continue do
+	}
+}
+
+func getIP() (*IPResponse, error) {
+
+	var ip IPResponse
+	resp, err := http.Get("https://myip.wtf/json")
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	data, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	err = json.Unmarshal(data, &ip)
+	return &ip, err
+}
+
+func getDNSRecords(
+	client *cloudflare.Client,
+	zoneID string,
+) (*[]dns.RecordResponse, error) {
+	dnslist, err := client.DNS.Records.List(
+		context.TODO(),
+		dns.RecordListParams{
+			ZoneID: cloudflare.F(zoneID),
+		},
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	var records []dns.RecordResponse
+	for _, item := range dnslist.Result {
+
+		if item.Type == "A" {
+			records = append(records, item)
+		}
+	}
+	return &records, nil
+}
+
+func updateDNSRecords(
+	client *cloudflare.Client,
+	zoneID string,
+	ipAddress string,
+) error {
+	records, err := getDNSRecords(client, zoneID)
+	if err != nil {
+		return err
+	}
+
+	for _, record := range *records {
+
+		NewDNS := dns.ARecordParam{
+			Comment: cloudflare.F(record.Comment),
+			Content: cloudflare.F(ipAddress),
+			Name:    cloudflare.F(record.Name),
+			Proxied: cloudflare.F(record.Proxied),
+			TTL:     cloudflare.F(record.TTL),
+			Type:    cloudflare.F(dns.ARecordTypeA),
+		}
+
+		_, err = client.DNS.Records.Edit(
+			context.TODO(), record.ID, dns.RecordEditParams{
+				ZoneID: cloudflare.F(zoneID),
+				Record: NewDNS,
+			},
+		)
+		if err != nil {
+			return err
+		}
+
+		fmt.Printf("Updated IP address for %s\n", record.Name)
+	}
+	return nil
+}