87 lines
2.0 KiB
Go
87 lines
2.0 KiB
Go
package middleware
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import (
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"encoding/json"
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"errors"
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"fmt"
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"net/http"
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"hfb_sys/backend/pkg/response"
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"github.com/gin-gonic/gin"
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"github.com/redis/go-redis/v9"
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)
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// RequirePermission 检查当前管理员是否拥有指定权限。
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// 超级管理员（拥有 super_admin 角色的管理员）自动放行。
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func RequirePermission(permCode string, rdb *redis.Client) gin.HandlerFunc {
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return func(c *gin.Context) {
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if checkPermission(c, permCode, rdb) {
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c.Next()
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}
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}
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}
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func RequirePermissionIf(permCode string, rdb *redis.Client, predicate func(*gin.Context) bool) gin.HandlerFunc {
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return func(c *gin.Context) {
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if predicate == nil || !predicate(c) {
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c.Next()
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return
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}
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if checkPermission(c, permCode, rdb) {
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c.Next()
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}
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}
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}
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func checkPermission(c *gin.Context, permCode string, rdb *redis.Client) bool {
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value, ok := c.Get(ContextAdminID)
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if !ok {
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response.Unauthorized(c, "缺少管理员上下文")
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c.Abort()
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return false
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}
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adminID, ok := value.(uint64)
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if !ok {
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response.Unauthorized(c, "管理员上下文无效")
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c.Abort()
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return false
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}
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codes, err := getPermCodes(c, rdb, adminID)
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if err != nil {
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response.Error(c, http.StatusInternalServerError, "perm_check_failed", "权限校验服务暂时不可用")
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c.Abort()
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return false
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}
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for _, code := range codes {
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if code == permCode || code == "*" {
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return true
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}
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}
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response.Error(c, http.StatusForbidden, "forbidden", "没有操作权限")
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c.Abort()
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return false
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}
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func getPermCodes(c *gin.Context, rdb *redis.Client, adminID uint64) ([]string, error) {
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if rdb == nil {
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return nil, errors.New("redis unavailable")
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}
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key := fmt.Sprintf("admin:perms:%d", adminID)
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raw, err := rdb.Get(c.Request.Context(), key).Result()
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if errors.Is(err, redis.Nil) {
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return nil, nil // 缓存未命中，视为无权限
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}
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if err != nil {
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return nil, err
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}
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var codes []string
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if err := json.Unmarshal([]byte(raw), &codes); err != nil {
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return nil, err
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}
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return codes, nil
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}
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