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niumalll/go-backend/middleware/auth.go

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package middleware
import (
"net/http"
"strings"
"github.com/gin-gonic/gin"
"niumall-go/utils"
)
// AuthMiddleware authenticates requests using JWT
func AuthMiddleware() gin.HandlerFunc {
return func(c *gin.Context) {
// Get authorization header
authHeader := c.GetHeader("Authorization")
if authHeader == "" {
c.JSON(http.StatusUnauthorized, gin.H{"error": "Authorization header required"})
c.Abort()
return
}
// Check if header has Bearer prefix
if !strings.HasPrefix(authHeader, "Bearer ") {
c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid authorization header format"})
c.Abort()
return
}
// Extract token
tokenString := strings.TrimPrefix(authHeader, "Bearer ")
// Parse and validate token
claims, err := utils.ParseJWT(tokenString)
if err != nil {
c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid or expired token"})
c.Abort()
return
}
// Set user UUID in context for use in handlers
c.Set("user_uuid", claims.UUID)
c.Next()
}
}