Adding upstream version 2.52.6.

Signed-off-by: Daniel Baumann <daniel@debian.org>

middleware/expvar/expvar.go

@@ -0,0 +1,35 @@
+package expvar
+
+import (
+	"strings"
+
+	"github.com/gofiber/fiber/v2"
+
+	"github.com/valyala/fasthttp/expvarhandler"
+)
+
+// New creates a new middleware handler
+func New(config ...Config) fiber.Handler {
+	// Set default config
+	cfg := configDefault(config...)
+
+	// Return new handler
+	return func(c *fiber.Ctx) error {
+		// Don't execute middleware if Next returns true
+		if cfg.Next != nil && cfg.Next(c) {
+			return c.Next()
+		}
+
+		path := c.Path()
+		// We are only interested in /debug/vars routes
+		if len(path) < 11 || !strings.HasPrefix(path, "/debug/vars") {
+			return c.Next()
+		}
+		if path == "/debug/vars" {
+			expvarhandler.ExpvarHandler(c.Context())
+			return nil
+		}
+
+		return c.Redirect("/debug/vars", fiber.StatusFound)
+	}
+}