feat: independent limiter for user/inbound

docs/configuration/limiter/index.md

@@ -13,10 +13,12 @@
         "user-a",
         "user-b"
       ],
+      "auth_user_independent": false,
       "inbound": [
         "in-a",
         "in-b"
-      ]
+      ],
+      "inbound_independent": false
     }
   ]
 }
@@ -39,12 +41,16 @@ The tag of the limiter, used in route rule.
 
 #### auth_user
 
-Global limiter for a group of usernames, see each inbound for details.
+Apply limiter for a group of usernames, see each inbound for details.
+
+#### auth_user_independent
+
+Make each auth_user's limiter independent. If disabled, the same limiter will be shared.
 
 #### inbound
 
-Global limiter for a group of inbounds.
+Apply limiter for a group of inbounds.
 
-!!! info ""
+#### inbound_independent
 
-    All the auth_users, inbounds and route rule with limiter tag share the same limiter. To take effect independently, configure limiters seperately.
+Make each inbound's limiter independent. If disabled, the same limiter will be shared.

docs/configuration/limiter/index.zh.md

@@ -13,10 +13,12 @@
         "user-a",
         "user-b"
       ],
+      "auth_user_independent": false,
       "inbound": [
         "in-a",
         "in-b"
-      ]
+      ],
+      "inbound_independent": false
     }
   ]
 }
@@ -39,12 +41,16 @@
 
 #### auth_user
 
-用户组全局限速，参阅入站设置。
+用户组限速，参阅入站设置。
+
+#### auth_user_independent
+
+使每个用户有单独的限速。关闭时将共享限速。
 
 #### inbound
 
-入站组全局限速。
+入站组限速。
 
-!!! info ""
+#### inbound_independent
 
-    所有用户、入站和有限速标签的路由规则共享同一个限速。为了独立生效，请分别配置限速器。
+使每个入站有单独的限速。关闭时将共享限速。

limiter/builder.go

@@ -59,26 +59,29 @@ func (m *defaultManager) createLimiter(ctx context.Context, option option.Limite
 	if download == 0 && upload == 0 {
 		return E.New("download/upload, at least one must be set")
 	}
-	l := newLimiter(download, upload)
-	valid := false
-	if len(option.Tag) > 0 {
-		valid = true
-		m.mp[limiterKey{prefixTag, option.Tag}] = l
+	if option.Tag == "" && len(option.AuthUser) == 0 && len(option.Inbound) == 0 {
+		return E.New("tag/user/inbound, at least one must be set")
 	}
-	if len(option.AuthUser) > 0 {
-		valid = true
-		for _, user := range option.AuthUser {
-			m.mp[limiterKey{prefixUser, user}] = l
-		}
+	var sharedLimiter *limiter
+	if option.Tag != "" || !option.AuthUserIndependent || !option.InboundIndependent {
+		sharedLimiter = newLimiter(download, upload)
 	}
-	if len(option.Inbound) > 0 {
-		valid = true
-		for _, inbound := range option.Inbound {
-			m.mp[limiterKey{prefixInbound, inbound}] = l
+	if option.Tag != "" {
+		m.mp[limiterKey{prefixTag, option.Tag}] = sharedLimiter
+	}
+	for _, user := range option.AuthUser {
+		if option.AuthUserIndependent {
+			m.mp[limiterKey{prefixUser, user}] = newLimiter(download, upload)
+		} else {
+			m.mp[limiterKey{prefixUser, user}] = sharedLimiter
 		}
 	}
-	if !valid {
-		return E.New("tag/user/inbound, at least one must be set")
+	for _, inbound := range option.Inbound {
+		if option.InboundIndependent {
+			m.mp[limiterKey{prefixInbound, inbound}] = newLimiter(download, upload)
+		} else {
+			m.mp[limiterKey{prefixInbound, inbound}] = sharedLimiter
+		}
 	}
 	return
 }

option/limiter.go

@@ -1,9 +1,11 @@
 package option
 
 type Limiter struct {
-	Tag      string           `json:"tag"`
-	Download string           `json:"download,omitempty"`
-	Upload   string           `json:"upload,omitempty"`
-	AuthUser Listable[string] `json:"auth_user,omitempty"`
-	Inbound  Listable[string] `json:"inbound,omitempty"`
+	Tag                 string           `json:"tag"`
+	Download            string           `json:"download,omitempty"`
+	Upload              string           `json:"upload,omitempty"`
+	AuthUser            Listable[string] `json:"auth_user,omitempty"`
+	AuthUserIndependent bool             `json:"auth_user_independent,omitempty"`
+	Inbound             Listable[string] `json:"inbound,omitempty"`
+	InboundIndependent  bool             `json:"inbound_independent,omitempty"`
 }