Adding upstream version 2.52.6.

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

middleware/recover/recover.go

@@ -0,0 +1,45 @@
+package recover //nolint:predeclared // TODO: Rename to some non-builtin
+
+import (
+	"fmt"
+	"os"
+	"runtime/debug"
+
+	"github.com/gofiber/fiber/v2"
+)
+
+func defaultStackTraceHandler(_ *fiber.Ctx, e interface{}) {
+	_, _ = os.Stderr.WriteString(fmt.Sprintf("panic: %v\n%s\n", e, debug.Stack())) //nolint:errcheck // This will never fail
+}
+
+// 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) (err error) { //nolint:nonamedreturns // Uses recover() to overwrite the error
+		// Don't execute middleware if Next returns true
+		if cfg.Next != nil && cfg.Next(c) {
+			return c.Next()
+		}
+
+		// Catch panics
+		defer func() {
+			if r := recover(); r != nil {
+				if cfg.EnableStackTrace {
+					cfg.StackTraceHandler(c, r)
+				}
+
+				var ok bool
+				if err, ok = r.(error); !ok {
+					// Set error that will call the global error handler
+					err = fmt.Errorf("%v", r)
+				}
+			}
+		}()
+
+		// Return err if exist, else move to next handler
+		return c.Next()
+	}
+}