move addr extractor to misc

server/extractor.go

@@ -2,25 +2,12 @@ package server
 
 import (
 	"fmt"
-	"net"
 	"reflect"
 	"strings"
 
 	"github.com/micro/go-micro/registry"
 )
 
-var (
-	privateBlocks []*net.IPNet
-)
-
-func init() {
-	for _, b := range []string{"10.0.0.0/8", "172.16.0.0/12", "192.168.0.0/16"} {
-		if _, block, err := net.ParseCIDR(b); err == nil {
-			privateBlocks = append(privateBlocks, block)
-		}
-	}
-}
-
 func extractValue(v reflect.Type, d int) *registry.Value {
 	if d == 3 {
 		return nil
@@ -128,55 +115,3 @@ func extractSubValue(typ reflect.Type) *registry.Value {
 	}
 	return extractValue(reqType, 0)
 }
-
-func extractAddress(addr string) (string, error) {
-	if len(addr) > 0 && (addr != "0.0.0.0" && addr != "[::]") {
-		return addr, nil
-	}
-
-	addrs, err := net.InterfaceAddrs()
-	if err != nil {
-		return "", fmt.Errorf("Failed to get interface addresses! Err: %v", err)
-	}
-
-	var ipAddr []byte
-
-	for _, rawAddr := range addrs {
-		var ip net.IP
-		switch addr := rawAddr.(type) {
-		case *net.IPAddr:
-			ip = addr.IP
-		case *net.IPNet:
-			ip = addr.IP
-		default:
-			continue
-		}
-
-		if ip.To4() == nil {
-			continue
-		}
-
-		if !isPrivateIP(ip.String()) {
-			continue
-		}
-
-		ipAddr = ip
-		break
-	}
-
-	if ipAddr == nil {
-		return "", fmt.Errorf("No private IP address found, and explicit IP not provided")
-	}
-
-	return net.IP(ipAddr).String(), nil
-}
-
-func isPrivateIP(ipAddr string) bool {
-	ip := net.ParseIP(ipAddr)
-	for _, priv := range privateBlocks {
-		if priv.Contains(ip) {
-			return true
-		}
-	}
-	return false
-}