ip/resolver: add some more resolvers

ip/resolver/manager.go

@@ -50,4 +50,15 @@ func init() {
 		ServiceName: "icanhazip",
 		Url:         "https://icanhazip.com",
 	})
+
+	Provide(&httpres.Service{
+		ServiceName: "ipify",
+		Url:         "https://api.ipify.org",
+	})
+
+	Provide(&httpres.Service{
+		ServiceName: "myip",
+		Url:         "https://api.myip.com",
+		Decoder:     MyIPDecoder,
+	})
 }

ip/resolver/myip.go

@@ -0,0 +1,20 @@
+package resolver
+
+import (
+	"encoding/json"
+	"io"
+)
+
+func MyIPDecoder(r io.Reader) ([]byte, error) {
+	var v struct {
+		Ip      string `json:"ip"`
+		Country string `json:"country"`
+		Cc      string `json:"cc"`
+	}
+	var val []byte
+	err := json.NewDecoder(r).Decode(&v)
+	if err == nil {
+		val = []byte(v.Ip)
+	}
+	return val, err
+}