Added icanhazip resolver

public_resolvers/icanhazip.go

@@ -0,0 +1,31 @@
+package public_resolvers
+
+import (
+	"net/http"
+	"time"
+)
+
+const (
+	IcanhazipTag = "icanhazip"
+	IcanhazipUrl = "https://v4.icanhazip.com/"
+)
+
+type Icanhazip struct {
+	baseResolver
+}
+
+func NewIcanhazipDefault() *Icanhazip {
+	return NewIcanhazip(&http.Client{
+		Timeout: 10 * time.Second,
+	})
+}
+
+func NewIcanhazip(client Doer) *Icanhazip {
+	return &Icanhazip{
+		baseResolver: baseResolver{
+			client:   client,
+			url:      v4IdentMeUrl,
+			ipParser: defaultIpParser,
+		},
+	}
+}