qoder生成项目

middleware/auth.go

@@ -0,0 +1,93 @@
+package middleware
+
+import (
+	"net/http"
+	"strings"
+
+	"goblog/handlers"
+
+	"github.com/gin-gonic/gin"
+	"github.com/golang-jwt/jwt/v5"
+)
+
+// JWT 认证中间件
+func JWTAuth() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		authHeader := c.GetHeader("Authorization")
+		if authHeader == "" {
+			c.JSON(http.StatusUnauthorized, gin.H{"error": "缺少认证令牌"})
+			c.Abort()
+			return
+		}
+
+		parts := strings.SplitN(authHeader, " ", 2)
+		if !(len(parts) == 2 && parts[0] == "Bearer") {
+			c.JSON(http.StatusUnauthorized, gin.H{"error": "认证格式错误"})
+			c.Abort()
+			return
+		}
+
+		tokenString := parts[1]
+		claims := &handlers.Claims{}
+
+		token, err := jwt.ParseWithClaims(tokenString, claims, func(token *jwt.Token) (interface{}, error) {
+			return handlers.JWTSecret(), nil
+		})
+
+		if err != nil || !token.Valid {
+			c.JSON(http.StatusUnauthorized, gin.H{"error": "无效的令牌"})
+			c.Abort()
+			return
+		}
+
+		c.Set("userID", claims.UserID)
+		c.Set("username", claims.Username)
+		c.Set("role", claims.Role)
+		c.Next()
+	}
+}
+
+// 管理员权限中间件
+func AdminRequired() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		role, exists := c.Get("role")
+		if !exists || role != "admin" {
+			c.JSON(http.StatusForbidden, gin.H{"error": "需要管理员权限"})
+			c.Abort()
+			return
+		}
+		c.Next()
+	}
+}
+
+// 可选认证中间件（用于某些既支持游客又支持登录用户的接口）
+func OptionalAuth() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		authHeader := c.GetHeader("Authorization")
+		if authHeader == "" {
+			c.Next()
+			return
+		}
+
+		parts := strings.SplitN(authHeader, " ", 2)
+		if len(parts) != 2 || parts[0] != "Bearer" {
+			c.Next()
+			return
+		}
+
+		tokenString := parts[1]
+		claims := &handlers.Claims{}
+
+		token, err := jwt.ParseWithClaims(tokenString, claims, func(token *jwt.Token) (interface{}, error) {
+			return handlers.JWTSecret(), nil
+		})
+
+		if err == nil && token.Valid {
+			c.Set("userID", claims.UserID)
+			c.Set("username", claims.Username)
+			c.Set("role", claims.Role)
+		}
+
+		c.Next()
+	}
+}