Add v4.ident.me resolver

public_resolvers/ifconfigme.go

@@ -1,28 +1,17 @@
 package public_resolvers
 
 import (
-	"context"
-	"fmt"
-	"io"
-	"net"
 	"net/http"
 	"time"
 )
 
 const (
 	IfConfigMeTag = "ifconfig.me"
-)
-
-type Doer interface {
-	Do(*http.Request) (*http.Response, error)
-}
-
-var (
 	ifConfigMeUrl = "https://ifconfig.me"
 )
 
 type IfConfigMe struct {
-	client Doer
+	baseResolver
 }
 
 func NewDefaultIfConfigMe() *IfConfigMe {
@@ -31,32 +20,11 @@ func NewDefaultIfConfigMe() *IfConfigMe {
 	})
 }
 
-func NewIfConfigMe(c Doer) *IfConfigMe {
-	return &IfConfigMe{client: c}
-}
-
-func (i IfConfigMe) ResolvePublicIp(ctx context.Context) (net.IP, error) {
-	req, err := http.NewRequestWithContext(ctx, http.MethodGet, ifConfigMeUrl, nil)
-	if err != nil {
-		return net.IP{}, fmt.Errorf("error creating ifconfig request: %w", err)
-	}
-
-	resp, err := i.client.Do(req)
-	if err != nil {
-		return net.IP{}, err
-	}
-	defer func() {
-		_ = resp.Body.Close()
-	}()
-
-	if resp.StatusCode != http.StatusOK {
-		return net.IP{}, fmt.Errorf("unexpected response code %d", resp.StatusCode)
-	}
-
-	ipText, err := io.ReadAll(resp.Body)
-	if err != nil {
-		return net.IP{}, fmt.Errorf("error reading body: %w", err)
-	}
-
-	return net.ParseIP(string(ipText)), nil
+func NewIfConfigMe(client Doer) *IfConfigMe {
+	return &IfConfigMe{
+		baseResolver: baseResolver{
+			client: client,
+			url:    ifConfigMeUrl,
+		},
+	}
 }