fix: bypass rules should not check first

internal/route/rules/rules.go

@@ -2,8 +2,6 @@ package rules
 
 import (
 	"net/http"
-
-	"github.com/yusing/go-proxy/internal/logging"
 )
 
 type (
@@ -48,76 +46,58 @@ type (
 
 // BuildHandler returns a http.HandlerFunc that implements the rules.
 //
-//	Bypass rules are executed first
 //	if a bypass rule matches,
 //	the request is passed to the upstream and no more rules are executed.
 //
-//	Other rules are executed later
 //	if no rule matches, the default rule is executed
 //	if no rule matches and default rule is not set,
 //	the request is passed to the upstream.
 func (rules Rules) BuildHandler(up http.Handler) http.HandlerFunc {
-	// move bypass rules to the front.
-	bypassRules := make(Rules, 0, len(rules))
-	otherRules := make(Rules, 0, len(rules))
+	var (
+		defaultRule      Rule
+		defaultRuleIndex int
+	)
 
-	var defaultRule Rule
-
-	for _, rule := range rules {
-		switch {
-		case rule.Do.isBypass():
-			bypassRules = append(bypassRules, rule)
-		case rule.Name == "default":
+	for i, rule := range rules {
+		if rule.Name == "default" {
 			defaultRule = rule
-		default:
-			otherRules = append(otherRules, rule)
+			defaultRuleIndex = i
+			break
 		}
 	}
 
+	rules = append(rules[:defaultRuleIndex], rules[defaultRuleIndex+1:]...)
+
 	// free allocated empty slices
 	// before encapsulating them into the handlerFunc.
-	if len(bypassRules) == 0 {
-		bypassRules = []Rule{}
-	}
-	if len(otherRules) == 0 {
-		otherRules = []Rule{}
+	if len(rules) == 0 {
+		if defaultRule.Do.isBypass() {
+			return up.ServeHTTP
+		}
+		rules = []Rule{}
 	}
 
 	return func(w http.ResponseWriter, r *http.Request) {
-		for _, rule := range bypassRules {
-			if rule.On.check(r) {
-				logging.Debug().
-					Str("rule", rule.Name).
-					Msg("matched: bypass")
-				up.ServeHTTP(w, r)
-				return
-			}
-		}
 		hasMatch := false
-		for _, rule := range otherRules {
+		for _, rule := range rules {
 			if rule.On.check(r) {
-				logging.Debug().
-					Str("rule", rule.Name).
-					Msgf("matched proceed=%t", rule.Do.exec.proceed)
-				hasMatch = true
+				if rule.Do.isBypass() {
+					up.ServeHTTP(w, r)
+					return
+				}
 				rule.Do.exec.HandlerFunc(w, r)
 				if !rule.Do.exec.proceed {
 					return
 				}
+				hasMatch = true
 			}
 		}
+
 		if hasMatch || defaultRule.Do.isBypass() {
-			logging.Debug().
-				Str("rule", defaultRule.Name).
-				Msg("matched: bypass")
 			up.ServeHTTP(w, r)
 			return
 		}
 
-		logging.Debug().
-			Str("rule", defaultRule.Name).
-			Msg("matched: default")
-
 		defaultRule.Do.exec.HandlerFunc(w, r)
 	}
 }