JWT proto with login & registration

internal/auth/middleware.go

@@ -0,0 +1,34 @@
+package auth
+
+import (
+	"net/http"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+)
+
+func AuthMiddleware(jwtSecret []byte) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		authHeader := c.GetHeader("Authorization")
+		if authHeader == "" {
+			c.AbortWithStatusJSON(http.StatusUnauthorized, ErrorResponse{Error: "authorization header required"})
+			return
+		}
+
+		parts := strings.SplitN(authHeader, " ", 2)
+		if len(parts) != 2 || parts[0] != "Bearer" {
+			c.AbortWithStatusJSON(http.StatusUnauthorized, ErrorResponse{Error: "invalid authorization header format"})
+			return
+		}
+
+		claims, err := ValidateToken(parts[1], jwtSecret)
+		if err != nil {
+			c.AbortWithStatusJSON(http.StatusUnauthorized, ErrorResponse{Error: "invalid or expired token"})
+			return
+		}
+
+		c.Set("user_id", claims.UserID)
+		c.Set("email", claims.Email)
+		c.Next()
+	}
+}