Updated to 3 providers to add more reliability

main.go

@@ -3,6 +3,7 @@ package main
 import (
 	"context"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"github.com/caarlos0/env/v6"
 	"github.com/cloudflare/cloudflare-go/v4"
@@ -12,11 +13,14 @@ import (
 	"io"
 	"log"
 	"net/http"
+	"regexp"
 	"time"
 )
 
-type IPResponse struct {
-	IPAddress   string `json:"YourFuckingIPAddress"`
+var ipPattern = `^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$`
+
+type WTFIPResponse struct {
+	IP          string `json:"YourFuckingIPAddress"`
 	Location    string `json:"YourFuckingLocation"`
 	Hostname    string `json:"YourFuckingHostname"`
 	ISP         string `json:"YourFuckingISP"`
@@ -26,10 +30,111 @@ type IPResponse struct {
 	CountryCode string `json:"YourFuckingCountryCode"`
 }
 
+type IpifyResponse struct {
+	IP string `json:"ip"`
+}
+
+type IpInfoResponse struct {
+	IP       string `json:"ip"`
+	Hostname string `json:"hostname"`
+	City     string `json:"city"`
+	Region   string `json:"region"`
+	Country  string `json:"country"`
+	Loc      string `json:"loc"`
+	Org      string `json:"org"`
+	Postal   string `json:"postal"`
+	Timezone string `json:"timezone"`
+	Readme   string `json:"readme"`
+}
+type Response struct {
+	IPAddress string
+}
+
+type ResponseInterface interface {
+	getIP() Response
+}
+
+func (r *WTFIPResponse) getIP() Response {
+	return Response{IPAddress: r.IP}
+}
+func (r *IpInfoResponse) getIP() Response {
+	return Response{IPAddress: r.IP}
+}
+func (r *IpifyResponse) getIP() Response {
+	return Response{IPAddress: r.IP}
+}
+
+func NewIpifyProvider() *IpProvider {
+	return &IpProvider{
+		url:  "https://api.ipify.org?format=json",
+		resp: new(IpifyResponse),
+		client: http.Client{
+			Timeout: 5 * time.Second,
+		},
+	}
+}
+
+func NewIpInfoProvider() *IpProvider {
+	return &IpProvider{
+		url:  "https://ipinfo.io/json",
+		resp: new(IpInfoResponse),
+		client: http.Client{
+			Timeout: 5 * time.Second,
+		},
+	}
+}
+
+func NewWTFProvider() *IpProvider {
+	return &IpProvider{
+		url:  "https://myip.wtf/json",
+		resp: new(WTFIPResponse),
+		client: http.Client{
+			Timeout: 5 * time.Second,
+		},
+	}
+}
+
+type IpProvider struct {
+	url    string
+	resp   interface{}
+	client http.Client
+}
+
+func (p *IpProvider) get() *Response {
+
+	body, err := p.client.Get(p.url)
+	if err != nil {
+		return nil
+	}
+	defer body.Body.Close()
+
+	data, err := io.ReadAll(body.Body)
+	if err != nil {
+		return nil
+	}
+
+	err = json.Unmarshal(data, &p.resp)
+	if err != nil {
+		return nil
+	}
+
+	resp := p.resp.(ResponseInterface).getIP()
+	pattern := regexp.MustCompile(ipPattern)
+
+	if !pattern.MatchString(resp.IPAddress) {
+		return nil
+	}
+
+	return &resp
+}
+
 type Config struct {
 	CloudflareZoneID string `env:"CLOUDFLARE_ZONE_ID"`
 	CloudFlareAPIKey string `env:"CLOUDFLARE_API_KEY"`
 	CloudflareEmail  string `env:"CLOUDFLARE_EMAIL"`
+	IpProviders      []*IpProvider
+	Client           *cloudflare.Client
+	Timeout          time.Duration
 }
 
 func main() {
@@ -40,7 +145,9 @@ func main() {
 		return
 	}
 
-	config := &Config{}
+	config := &Config{
+		Timeout: 5 * time.Second,
+	}
 	err = env.Parse(config)
 	if err != nil {
 		log.Fatal("Failed to load env file")
@@ -52,81 +159,107 @@ func main() {
 		return
 	}
 
-	client := cloudflare.NewClient(
+	config.Client = cloudflare.NewClient(
 		option.WithAPIKey(config.CloudFlareAPIKey),
 		option.WithAPIEmail(config.CloudflareEmail),
 	)
 
-	ExistingIP, err := getIP()
-	if err != nil {
-		fmt.Println(err)
-		return
-	}
+	config.IpProviders = append(
+		config.IpProviders,
+		NewWTFProvider(),
+	)
+	config.IpProviders = append(
+		config.IpProviders,
+		NewIpifyProvider(),
+	)
+	config.IpProviders = append(
+		config.IpProviders,
+		NewIpInfoProvider(),
+	)
+
+	ExistingIP, err := GetIPAddress(config)
+
+	fmt.Printf("The current IP address is: %s\n", ExistingIP)
 
 	err = updateDNSRecords(
-		client,
-		config.CloudflareZoneID,
-		ExistingIP.IPAddress,
+		config,
+		ExistingIP,
 	)
 	if err != nil {
 		fmt.Println(err)
 	}
 
-	fmt.Println("Your public IP address is:", ExistingIP.IPAddress)
-
 do:
 	for {
-		CurrentIP, err := getIP()
+		CurrentIP, err := GetIPAddress(config)
 		if err != nil {
 			fmt.Println(err)
 			continue do
 		}
 
-		if ExistingIP.IPAddress != CurrentIP.IPAddress {
+		if ExistingIP == CurrentIP {
+			time.Sleep(config.Timeout)
+			continue do
+		}
+
 		ExistingIP = CurrentIP
-			fmt.Println(
-				"Your public IP address has updated:",
-				ExistingIP.IPAddress,
+		fmt.Printf(
+			"Your IP address has changed: %s\n",
+			CurrentIP,
 		)
 
-			err := updateDNSRecords(
-				client,
-				config.CloudflareZoneID,
-				CurrentIP.IPAddress,
+		err = updateDNSRecords(
+			config,
+			CurrentIP,
 		)
 		if err != nil {
 			fmt.Println(err)
-				break
 		}
 
-		} else {
-			fmt.Println("Your public IP address has not changed.")
-		}
-
-		time.Sleep(10 * time.Second)
+		time.Sleep(config.Timeout)
 		continue do
 	}
 }
 
-func getIP() (*IPResponse, error) {
+func GetIPAddress(config *Config) (string, error) {
 
-	client := &http.Client{
-		Timeout: time.Second * 5,
-	}
-	var ip IPResponse
-	resp, err := client.Get("https://myip.wtf/json")
-	if err != nil {
-		return nil, err
-	}
-	defer resp.Body.Close()
+	responses := []*Response{}
 
-	data, err := io.ReadAll(resp.Body)
-	if err != nil {
-		return nil, err
+	for _, provider := range config.IpProviders {
+		resp := provider.get()
+		responses = append(responses, resp)
 	}
 
-	err = json.Unmarshal(data, &ip)
-	return &ip, err
+	// Count the occurrences of each IPAddress
+	counts := map[string]int{}
+	for _, r := range responses {
+		if r != nil {
+			IP := r.IPAddress
+			if count, ok := counts[IP]; ok {
+				counts[IP] = count + 1
+			} else {
+				counts[IP] = 1
+			}
+		}
+	}
+
+	// Find the IPAddress that repeats the most
+	maxCount := 0
+	CurrentIP := ""
+	for IP, count := range counts {
+		if count > maxCount {
+			maxCount = count
+			CurrentIP = IP
+		}
+	}
+
+	pattern := regexp.MustCompile(ipPattern)
+
+	if !pattern.MatchString(CurrentIP) {
+		return "", errors.New("Did not find a valid IP")
+	}
+
+	return CurrentIP, nil
 }
 
 func getDNSRecords(
@@ -154,17 +287,23 @@ func getDNSRecords(
 }
 
 func updateDNSRecords(
-	client *cloudflare.Client,
-	zoneID string,
+	config *Config,
 	ipAddress string,
 ) error {
-	records, err := getDNSRecords(client, zoneID)
+	records, err := getDNSRecords(
+		config.Client,
+		config.CloudflareZoneID,
+	)
 	if err != nil {
 		return err
 	}
 
 	for _, record := range *records {
 
+		if record.Content == ipAddress {
+			continue
+		}
+
 		NewDNS := dns.ARecordParam{
 			Comment: cloudflare.F(record.Comment),
 			Content: cloudflare.F(ipAddress),
@@ -174,9 +313,9 @@ func updateDNSRecords(
 			Type:    cloudflare.F(dns.ARecordTypeA),
 		}
 
-		_, err = client.DNS.Records.Edit(
+		_, err = config.Client.DNS.Records.Edit(
 			context.TODO(), record.ID, dns.RecordEditParams{
-				ZoneID: cloudflare.F(zoneID),
+				ZoneID: cloudflare.F(config.CloudflareZoneID),
 				Record: NewDNS,
 			},
 		)