fix: acl matcher parsing, refactor

internal/acl/config.go

@@ -133,20 +133,16 @@ func (c *Config) IPAllowed(ip net.IP) bool {
 	}
 
 	ipAndStr := &maxmind.IPInfo{IP: ip, Str: ipStr}
-	for _, m := range c.Allow {
-		if m(ipAndStr) {
+	if c.Allow.Match(ipAndStr) {
 		c.log(ipAndStr, true)
 		c.cacheRecord(ipAndStr, true)
 		return true
 	}
-	}
-	for _, m := range c.Deny {
-		if m(ipAndStr) {
+	if c.Deny.Match(ipAndStr) {
 		c.log(ipAndStr, false)
 		c.cacheRecord(ipAndStr, false)
 		return false
 	}
-	}
 
 	c.log(ipAndStr, c.defaultAllow)
 	c.cacheRecord(ipAndStr, c.defaultAllow)

internal/acl/matcher.go

@@ -1,6 +1,7 @@
 package acl
 
 import (
+	"errors"
 	"net"
 	"strings"
 
@@ -8,7 +9,11 @@ import (
 	"github.com/yusing/go-proxy/internal/maxmind"
 )
 
-type Matcher func(*maxmind.IPInfo) bool
+type MatcherFunc func(*maxmind.IPInfo) bool
+
+type Matcher struct {
+	match MatcherFunc
+}
 
 type Matchers []Matcher
 
@@ -29,68 +34,69 @@ var errMatcherFormat = gperr.Multiline().AddLines(
 )
 
 var (
-	errSyntax               = gperr.New("syntax error")
-	errInvalidIP            = gperr.New("invalid IP")
-	errInvalidCIDR          = gperr.New("invalid CIDR")
-	errMaxMindNotConfigured = gperr.New("MaxMind not configured")
+	errSyntax               = errors.New("syntax error")
+	errInvalidIP            = errors.New("invalid IP")
+	errInvalidCIDR          = errors.New("invalid CIDR")
+	errMaxMindNotConfigured = errors.New("MaxMind not configured")
 )
 
-func ParseMatcher(s string) (Matcher, gperr.Error) {
+func (matcher *Matcher) Parse(s string) error {
 	parts := strings.Split(s, ":")
 	if len(parts) != 2 {
-		return nil, errSyntax
+		return errSyntax
 	}
 
 	switch parts[0] {
 	case MatcherTypeIP:
 		ip := net.ParseIP(parts[1])
 		if ip == nil {
-			return nil, errInvalidIP
+			return errInvalidIP
 		}
-		return matchIP(ip), nil
+		matcher.match = matchIP(ip)
 	case MatcherTypeCIDR:
 		_, net, err := net.ParseCIDR(parts[1])
 		if err != nil {
-			return nil, errInvalidCIDR
+			return errInvalidCIDR
 		}
-		return matchCIDR(net), nil
+		matcher.match = matchCIDR(net)
 	case MatcherTypeTimeZone:
 		if !maxmind.HasInstance() {
-			return nil, errMaxMindNotConfigured
+			return errMaxMindNotConfigured
 		}
-		return matchTimeZone(parts[1]), nil
+		matcher.match = matchTimeZone(parts[1])
 	case MatcherTypeCountry:
 		if !maxmind.HasInstance() {
-			return nil, errMaxMindNotConfigured
+			return errMaxMindNotConfigured
 		}
-		return matchISOCode(parts[1]), nil
+		matcher.match = matchISOCode(parts[1])
 	default:
-		return nil, errSyntax
+		return errSyntax
 	}
+	return nil
 }
 
 func (matchers Matchers) Match(ip *maxmind.IPInfo) bool {
 	for _, m := range matchers {
-		if m(ip) {
+		if m.match(ip) {
 			return true
 		}
 	}
 	return false
 }
 
-func matchIP(ip net.IP) Matcher {
+func matchIP(ip net.IP) MatcherFunc {
 	return func(ip2 *maxmind.IPInfo) bool {
 		return ip.Equal(ip2.IP)
 	}
 }
 
-func matchCIDR(n *net.IPNet) Matcher {
+func matchCIDR(n *net.IPNet) MatcherFunc {
 	return func(ip *maxmind.IPInfo) bool {
 		return n.Contains(ip.IP)
 	}
 }
 
-func matchTimeZone(tz string) Matcher {
+func matchTimeZone(tz string) MatcherFunc {
 	return func(ip *maxmind.IPInfo) bool {
 		city, ok := maxmind.LookupCity(ip)
 		if !ok {
@@ -100,7 +106,7 @@ func matchTimeZone(tz string) Matcher {
 	}
 }
 
-func matchISOCode(iso string) Matcher {
+func matchISOCode(iso string) MatcherFunc {
 	return func(ip *maxmind.IPInfo) bool {
 		city, ok := maxmind.LookupCity(ip)
 		if !ok {