working commit

app/router/recovermw.go

@@ -0,0 +1,43 @@
+/*
+ * Copyright 2026 Oleg Borodin <onborodin@gmail.com>
+ */
+package router
+
+import (
+	"net/http"
+	"runtime/debug"
+	"time"
+)
+
+func NewRecoveryMiddleware(print func(string, ...any)) MiddlewareFunc {
+	mw := func(next Handler) Handler {
+		return newRecoveryHandler(next, print)
+	}
+	return mw
+}
+
+type recoveryHandler struct {
+	next  Handler
+	print func(string, ...any)
+}
+
+func newRecoveryHandler(next Handler, print func(string, ...any)) *recoveryHandler {
+	return &recoveryHandler{
+		next:  next,
+		print: print,
+	}
+}
+
+func (hand recoveryHandler) ServeHTTP(rctx *Context) {
+	exitFunc := func() {
+		err := recover()
+		if err != nil {
+			rctx.Writer.WriteHeader(http.StatusInternalServerError)
+			stack := string(debug.Stack())
+			timestamp := time.Now().Format(time.RFC3339)
+			hand.print("%s %v ; %s\n", timestamp, err, stack)
+		}
+	}
+	defer exitFunc()
+	hand.next.ServeHTTP(rctx)
+}