feat!: listen to both http & https (#4536)

Co-authored-by: Andy Hsu <i@nn.ci>

server/middlewares/https.go

@@ -0,0 +1,21 @@
+package middlewares
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/alist-org/alist/v3/internal/conf"
+	"github.com/gin-gonic/gin"
+)
+
+func ForceHttps(c *gin.Context) {
+	if c.Request.TLS == nil {
+		host := c.Request.Host
+		// change port to https port
+		host = strings.Replace(host, fmt.Sprintf(":%d", conf.Conf.Port), fmt.Sprintf(":%d", conf.Conf.HttpsPort), 1)
+		c.Redirect(302, "https://"+host+c.Request.RequestURI)
+		c.Abort()
+		return
+	}
+	c.Next()
+}