Various fixes (#5)

* Fixes #1

* Fixes #2

* Fixes #3

* Fixes #4

middleware/cache.go

@@ -0,0 +1,10 @@
+package middleware
+
+import "github.com/gin-gonic/gin"
+
+func Cache() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		c.Header("Cache-Control", "public, max-age=60")
+		c.Next()
+	}
+}

middleware/session.go

@@ -18,7 +18,7 @@ func Session(db *gorm.DB) gin.HandlerFunc {
 				Identifier: sessionIdentifier,
 			}
 			res := db.Where(&ses).First(&ses)
-			if res.Error == nil {
+			if res.Error == nil && !ses.HasExpired() {
 				c.Set(UserIDKey, ses.UserID)
 			} else {
 				log.Println(res.Error)