Initial commit: 商品售卖网站

backend/internal/api/middlewares/auth.go

@@ -0,0 +1,79 @@
+package middlewares
+
+import (
+	"net/http"
+	"strings"
+
+	"sale/internal/utils"
+
+	"github.com/gin-gonic/gin"
+)
+
+func AuthMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		authHeader := c.GetHeader("Authorization")
+		if authHeader == "" {
+			c.JSON(http.StatusUnauthorized, gin.H{"error": "Authorization header is required"})
+			c.Abort()
+			return
+		}
+
+		parts := strings.SplitN(authHeader, " ", 2)
+		if len(parts) != 2 || parts[0] != "Bearer" {
+			c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid authorization header format"})
+			c.Abort()
+			return
+		}
+
+		claims, err := utils.ParseToken(parts[1])
+		if err != nil {
+			c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid or expired token"})
+			c.Abort()
+			return
+		}
+
+		c.Set("user_id", claims.UserID)
+		c.Set("role", claims.Role)
+		c.Next()
+	}
+}
+
+func RoleMiddleware(roles ...string) gin.HandlerFunc {
+	roleMap := make(map[string]bool)
+	for _, r := range roles {
+		roleMap[r] = true
+	}
+
+	return func(c *gin.Context) {
+		role, exists := c.Get("role")
+		if !exists {
+			c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
+			c.Abort()
+			return
+		}
+
+		if !roleMap[role.(string)] {
+			c.JSON(http.StatusForbidden, gin.H{"error": "Permission denied"})
+			c.Abort()
+			return
+		}
+
+		c.Next()
+	}
+}
+
+func CORSMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
+		c.Writer.Header().Set("Access-Control-Allow-Credentials", "true")
+		c.Writer.Header().Set("Access-Control-Allow-Headers", "Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization, accept, origin, Cache-Control, X-Requested-With")
+		c.Writer.Header().Set("Access-Control-Allow-Methods", "POST, OPTIONS, GET, PUT, DELETE")
+
+		if c.Request.Method == "OPTIONS" {
+			c.AbortWithStatus(204)
+			return
+		}
+
+		c.Next()
+	}
+}